Jump to content
  • William Maley
    William Maley

    German Prosecutors Raid Various Diamler Offices In Emission Investigation

    Sign in to follow this  

      More diesel problems, this time for Daimler

    Volkswagen isn't the only automaker that has the attention of German prosecutors. Yesterday, prosecutors carried out raids at various Daimler (parent company of Mercedes-Benz) buildings. This is part of an investigation into fraud related to false advertising and the possible manipulation of emissions with diesel powered vehicles.

    The Stuttgart public prosecutor's office told Reuters the raids were carried out "against known and unknown employees at Daimler, who are suspected of fraud and misleading advertising connected to manipulated emissions treatment of diesel passenger cars."

    23 prosecutors and around 230 staff, including police and state criminal authorities, searched 11 sites to look for evidence to help build a case.

    Diamler confirmed the raids to Reuters and said it was "cooperating with authorities."

    The company is also under investigation by the U.S. Justice Department for emission discrepancies with diesel vehicles.

    Source: Reuters

    Sign in to follow this  


    User Feedback

    Recommended Comments

    Yep.  I would have to think if they were hiding something it would have been found by now.  They have been selling diesels pretty much non stop the past 40 years.  And they seem to over engineer everything they make.  Whether they find something or not, or fine them or not, I think Mercedes is about to run far away from diesel anyway.  They see the future as battery power, and the Euro countries want electric cars, I just hope those countries have clean power plants, because if they burn coal and natural gas to make the electricity to power millions of cars that is pretty pointless.

    Share this comment


    Link to comment
    Share on other sites


    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.
    Note: Your post will require moderator approval before it will be visible.

    Guest
    Add a comment...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.




  • Similar Content

    • By Drew Dowdell
      After a brief hiatus, Ram is reintroducing the EcoDiesel for the 2020 Ram 1500 and in doing so, snatches away the torque crown held briefly by GM with their inline 6-cylinder diesel. 
      The 3.0 L V6 Diesel in the 2020 Ram produces 480 lb-ft of torque at 1,600 rpm, 20 more than the 460 in the GM Inline-6, while horsepower increases to 260 hp at 3,600 rpm, a bit lower than the GM's 277 hp and the Ford Powerstroke 250 hp.   The EcoDiesel is a DOHC V6 and achieves these numbers with a new generation water-cooled variable geometry turbo charger, higher compression ratio, redesigned cylinder heads, lightweight aluminum alloy pistons, and a redesigned EGR system. 
      The EcoDiesel will be available in all models and configurations, including for the first time, the Ram Rebel.  The 2019 Ram 1500 Classic is offered with the previous generation of this engine. 
      The engine will be produced at FCA's facility in Ferrara, Italy. 
       

      View full article
    • By Drew Dowdell
      After a brief hiatus, Ram is reintroducing the EcoDiesel for the 2020 Ram 1500 and in doing so, snatches away the torque crown held briefly by GM with their inline 6-cylinder diesel. 
      The 3.0 L V6 Diesel in the 2020 Ram produces 480 lb-ft of torque at 1,600 rpm, 20 more than the 460 in the GM Inline-6, while horsepower increases to 260 hp at 3,600 rpm, a bit lower than the GM's 277 hp and the Ford Powerstroke 250 hp.   The EcoDiesel is a DOHC V6 and achieves these numbers with a new generation water-cooled variable geometry turbo charger, higher compression ratio, redesigned cylinder heads, lightweight aluminum alloy pistons, and a redesigned EGR system. 
      The EcoDiesel will be available in all models and configurations, including for the first time, the Ram Rebel.  The 2019 Ram 1500 Classic is offered with the previous generation of this engine. 
      The engine will be produced at FCA's facility in Ferrara, Italy. 
       
    • By Drew Dowdell
      GM released power figures today for the new inline 6-cylinder diesel engine that will be available in the Chevrolet Silverado and GMC Sierra.  Available at the same price as the 6.2 liter model, GM promises the new engine will change perceptions about diesel performance and refinement.  GM recently announced the delay of the 3.0-liter diesel until the 2020 model year due to emissions certification delays. 
      Paired with a 10-speed automatic transmission, the diesel produces an SAE-certified 277 horsepower and 460 lb-ft of torque with 95 percent of that torque being available at just 1,250 RPM.  Torque peak comes at 1500 rpm and peak horsepower at 3750 rpm.
      The powertrain is setup to offer diesel exhaust braking to help slow the vehicle when the truck is in tow-haul mode, limiting the number of applications of the brakes to save on brake wear. The engine also has a user selective start-stop function to save additional fuel in city driving. 
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
      Manufacturing Location (of globally sourced parts)
      Flint, Mich.  
       
       
      Chevy Press release on page 2


      2020 CHEVROLET SILVERADO’S NEW, ADVANCED 3.0L DURAMAX TURBO-DIESEL REDEFINES EXPECTATIONS
      No-compromise engine delivers refinement, performance and efficiency
      2019-06-03
      DETROIT — The all-new 2020 Chevrolet Silverado’s available 3.0L Duramax inline-six turbo-diesel engine adds choice and versatility for full-size truck customers, offering class-leading torque and horsepower in addition to focusing on fuel economy and capability. It is the first-ever inline-six turbo-diesel offered in Chevrolet’s full-size light-duty trucks.
      Chevrolet engineers started with a clean-sheet design and developed an all-new engine that leverages the efficiency and refinement advantages of the inline six-cylinder architecture and incorporates advanced combustion and emissions technologies to optimize performance and efficiency. It is priced identically to the 6.2L V-8 as a $2,495 premium over a 5.3L V-8 model or $3,890 over a 2.7L Turbo model.
      “From the moment the engine is started, to its idle, acceleration and highway cruising, the 3.0L Duramax performance will change perceptions of what a diesel engine can offer in refinement,” said Nicola Menarini, director for Diesel Truck Engine Program Execution. “With advanced technologies that draw on global diesel expertise, it’s a no-compromise choice for those who want the capability and driving range of a diesel in a light-duty truck.”
      Available on LT, RST, LTZ and High Country models, the 3.0L Duramax diesel rounds out the new Silverado’s range of six propulsion choices, each tailored to suit customers’ needs for performance, efficiency, technology and value. It is rated at an SAE-certified 277 horsepower and 460 lb-ft of torque delivering 95 percent of peak torque at just 1,250 rpm. Peak torque is sustained from 1,500 rpm through 3,000 rpm, providing a powerfully smooth and satisfying driving experience.
      The 3.0L Duramax is paired with GM’s 10L80 10-speed automatic transmission, featuring a centrifugal pendulum absorber torque converter that reduces vibrations to improve smoothness, reinforcing its performance, efficiency and refinement. This combination also offers exhaust braking, which uses the diesel engine’s compression to help slow the vehicle, requiring fewer brake applications by the driver when in Tow Haul mode.
      Innovative Engine Technologies
      The inline six-cylinder architecture offers inherent efficiency and refinement, but the team expanded with smart technology choices to help improve efficiency and weight while optimizing the truck experience. A lightweight aluminum block and cylinder head reduce overall mass, and Active Thermal Management enhances efficiency and cold-weather warm-up. Ceramic glow plugs also help with shorter heat-up times and a quicker cold start, meaning the engine block heater is not needed until -22 degrees F.
      Towing is an important part of owning a truck, and customers can gain additional confidence thanks to the exhaust brake available in tow-haul mode. The water charge air cooler, coupled with low pressure EGR, reduces time to torque. The variable geometry turbocharger helps provide a greater balance of performance and efficiency, and an electronically variable intake manifold helps optimize performance across the rpm band.
      Inherently efficient and balanced
      Compared to a DOHC V-6, the inline-six architecture offers greater efficiency from the reduced friction of operating only two camshafts and their associated valvetrain components. The I6 configuration offers the perfect balance of primary and secondary forces, without the need for balancing shafts.
      “In addition to reduced friction, the architecture enables smooth operation,” Menarini said. “The new Duramax 3.0L elevates the 2019 Silverado with one of the most refined and efficient diesel engines in the segment.”
      Along with supporting elements such as a tuned air induction system and other noise-attenuating elements, the 3.0L Duramax delivers exceptional quietness and smoothness at all engine speeds.
      All-aluminum construction and tough rotating assembly
      The 3.0L Duramax cylinder block is made of a cast aluminum alloy that provides the strength required to support the high combustion pressures that occur within a diesel engine, while also offering an approximately 25 percent mass savings over a comparable cast iron engine block. Iron cylinder liners are used within the aluminum block to insure truck durability.
      There are seven nodular iron main bearing caps that help ensure the block’s strength under those high combustion pressures, while also enabling accurate location of the rotating assembly. A deep-skirt block design, where the block casting extends below the crankshaft centerline, also contributes to the engine’s stiffness and refinement. It’s complemented by a stiffness-enhancing aluminum lower crankcase extension attached to the main bearing caps.
      The rotating assembly consists of a forged steel crankshaft, forged steel connecting rods and hypereutectic aluminum pistons. The alloys in the respective castings for the rods and pistons make them lightweight and durable. Silicon is blended with the aluminum for heat resistance and tolerance within the piston cylinders, which enhances performance and makes the engine quiet.
      A thick piston crown — the top of the piston — and reinforced top ring add strength to support the tremendous cylinder pressures enabled by turbocharging and the engine’s high 15.0:1 compression ratio.
      DOHC Cylinder Head and Rear Cam Drive
      Overhead camshafts offer a direct, efficient means of operating the valves, while four valves per cylinder activated by maintenance-free finger followers with hydraulic lash adjusters increase airflow in and out of the engine. This arrangement is integrated on the Duramax 3.0L’s lightweight aluminum cylinder head, which is topped with a lightweight composite cam cover that incorporates the crankcase ventilation and oil separation systems.
      A pair of lightweight, assembled camshafts actuates 28.35 mm diameter (1.12-inch) intake and 24.55 mm diameter (0.97-inch) exhaust valves. The camshaft drivetrain is uniquely located at the rear (flywheel side) of the engine, for greater refinement and packaging considerations for the comparatively long inline-six. A crankshaft-driven chain drives the high-pressure direct-injection fuel pump, while a chain driven by the fuel pump drives both intake and exhaust camshafts. A smaller belt drives the variable flow oil pump from the crankshaft.
      Additional Technology Highlights
      Variable geometry turbocharging enables the Duramax 3.0L engine to deliver class-leading horsepower with minimal effect on overall efficiency. The system uses closed loop controlled vanes position and sophisticated electronic controls to automatically adjust boost pressure to the desired value based on engine running conditions and instantaneous power demand. The liquid-cooled turbocharger features a low-friction ball-bearing shaft and is mounted close to the exhaust outlet of the engine for quicker spool-up of the turbine and quicker light-off of the exhaust catalyst. A water-to-air intercooling system produces a cooler higher density air charge for greater power. Maximum boost pressure is 43,5 psi (300 Kpa) absolute.
      Low-pressure EGR: The Duramax 3.0L utilizes new low-pressure Exhaust Gas Recirculation to optimize performance and efficiency. The EGR system diverts some of the engine-out exhaust gas and mixes it back into the fresh intake air stream, which is drawn into the cylinder head for combustion. That lowers combustion temperatures and rates.
      Traditionally, EGR systems in diesel applications recirculate exhaust gases between the two high-pressure points, the exhaust manifold(s) and intake manifold. However, it generally requires efficiency-robbing assistance from the turbocharger or other supporting elements to achieve the pressure differential required for sufficient EGR flow rates.
      The new low-pressure system adds to the high-pressure system, supporting continual adjustment of exhaust backpressure for more efficient operation. It recirculates gases between the low-pressure points in the exhaust system (downstream of the particulate filter) and after the compressor inlet.
      When the low-pressure EGR is activated by an electronically controlled valve, the engine burns exhaust gas that has already passed through the particulate filter. That increases the turbocharger’s efficiency, which helps overall vehicle efficiency without deteriorating the rate of particulate matter emitted by the engine.
      A variable intake manifold offers dual air intake pathways for each cylinder. Electronically controlled flaps — one for each cylinder — shorten or lengthen the airflow to each cylinder. This optimizes the airflow into the engine and improves performance and responsiveness across the rpm band, particularly at lower engine speeds.
      A variable-pressure oiling system with a continuously variable-displacement vane oil pump enhances efficiency by optimizing oil pressure as a function of engine speed and load. With it, the oil supply is matched to the engine requirements rather than the excessive supply of a conventional, fixed-displacement oil pump. The engine uses low-friction Diesel Dexos 0W20 oil.
      Oil jets located in the block are employed for performance and temperature control. They target the inner core of the piston with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, allowing the engine to produce more power and enhance long-term durability than engines without the technology.
      Active Thermal Management helps the engine warm up quickly to achieve and maintain its optimal engine temperature for performance and efficiency over the entire engine operating range. The system uses a three-actuator rotary valve system to distribute coolant through the engine in a targeted manner. It sends heat where it’s needed to warm up the engine to reduce friction and heat the passenger cabin or cools when needed for high-power operation. The Duramax 3.0L also features split cooling between the block and head.
      Common rail direct fuel injection of 2,500 bar (36,250 psi) helps generates class-leading horsepower and torque. The system’s pressure is generated by an engine-driven twin-piston pump sending fuel to solenoid-activated injectors with nine-hole nozzles that support precise metering of the fuel for a smooth idle and lower combustion noise. The fuel system is capable of multiple injections per combustion cycle — up to 10 times per injector — for more consistent and stable combustion performance that translates into smoothness and refinement, particularly at idle.   
      Electronic throttle valve: The Duramax 3.0L features an electronic throttle valve to regulate intake manifold pressure in order to optimize exhaust gas recirculation rates. It also contributes to a smooth engine shutdown via a more controlled method of airflow reduction.
      Ceramic glow plugs used in the Duramax 3.0L heat up more quickly and hotter than conventional metal-based glow plugs, helping the engine start and heat up more quickly in cold weather. The Duramax 3.0L achieves unassisted and assisted starting temperatures of -22 F (-30 C) and -40 F (-40 C) respectively.
      Stop/start technology helps optimize efficiency in city driving. The driver-selectable system shuts off the engine at stoplights and other stop-and-go situations. The engine automatically restarts when the driver takes their foot off the brake.
      ABOUT CHEVROLET
      Founded in 1911 in Detroit, Chevrolet is one of the world's largest car brands, doing business in more than 100 countries and selling more than 4.0 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.
      # # #
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
       

      View full article
    • By Drew Dowdell
      GM released power figures today for the new inline 6-cylinder diesel engine that will be available in the Chevrolet Silverado and GMC Sierra.  Available at the same price as the 6.2 liter model, GM promises the new engine will change perceptions about diesel performance and refinement.  GM recently announced the delay of the 3.0-liter diesel until the 2020 model year due to emissions certification delays. 
      Paired with a 10-speed automatic transmission, the diesel produces an SAE-certified 277 horsepower and 460 lb-ft of torque with 95 percent of that torque being available at just 1,250 RPM.  Torque peak comes at 1500 rpm and peak horsepower at 3750 rpm.
      The powertrain is setup to offer diesel exhaust braking to help slow the vehicle when the truck is in tow-haul mode, limiting the number of applications of the brakes to save on brake wear. The engine also has a user selective start-stop function to save additional fuel in city driving. 
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
      Manufacturing Location (of globally sourced parts)
      Flint, Mich.  
       
       
      Chevy Press release on page 2


      2020 CHEVROLET SILVERADO’S NEW, ADVANCED 3.0L DURAMAX TURBO-DIESEL REDEFINES EXPECTATIONS
      No-compromise engine delivers refinement, performance and efficiency
      2019-06-03
      DETROIT — The all-new 2020 Chevrolet Silverado’s available 3.0L Duramax inline-six turbo-diesel engine adds choice and versatility for full-size truck customers, offering class-leading torque and horsepower in addition to focusing on fuel economy and capability. It is the first-ever inline-six turbo-diesel offered in Chevrolet’s full-size light-duty trucks.
      Chevrolet engineers started with a clean-sheet design and developed an all-new engine that leverages the efficiency and refinement advantages of the inline six-cylinder architecture and incorporates advanced combustion and emissions technologies to optimize performance and efficiency. It is priced identically to the 6.2L V-8 as a $2,495 premium over a 5.3L V-8 model or $3,890 over a 2.7L Turbo model.
      “From the moment the engine is started, to its idle, acceleration and highway cruising, the 3.0L Duramax performance will change perceptions of what a diesel engine can offer in refinement,” said Nicola Menarini, director for Diesel Truck Engine Program Execution. “With advanced technologies that draw on global diesel expertise, it’s a no-compromise choice for those who want the capability and driving range of a diesel in a light-duty truck.”
      Available on LT, RST, LTZ and High Country models, the 3.0L Duramax diesel rounds out the new Silverado’s range of six propulsion choices, each tailored to suit customers’ needs for performance, efficiency, technology and value. It is rated at an SAE-certified 277 horsepower and 460 lb-ft of torque delivering 95 percent of peak torque at just 1,250 rpm. Peak torque is sustained from 1,500 rpm through 3,000 rpm, providing a powerfully smooth and satisfying driving experience.
      The 3.0L Duramax is paired with GM’s 10L80 10-speed automatic transmission, featuring a centrifugal pendulum absorber torque converter that reduces vibrations to improve smoothness, reinforcing its performance, efficiency and refinement. This combination also offers exhaust braking, which uses the diesel engine’s compression to help slow the vehicle, requiring fewer brake applications by the driver when in Tow Haul mode.
      Innovative Engine Technologies
      The inline six-cylinder architecture offers inherent efficiency and refinement, but the team expanded with smart technology choices to help improve efficiency and weight while optimizing the truck experience. A lightweight aluminum block and cylinder head reduce overall mass, and Active Thermal Management enhances efficiency and cold-weather warm-up. Ceramic glow plugs also help with shorter heat-up times and a quicker cold start, meaning the engine block heater is not needed until -22 degrees F.
      Towing is an important part of owning a truck, and customers can gain additional confidence thanks to the exhaust brake available in tow-haul mode. The water charge air cooler, coupled with low pressure EGR, reduces time to torque. The variable geometry turbocharger helps provide a greater balance of performance and efficiency, and an electronically variable intake manifold helps optimize performance across the rpm band.
      Inherently efficient and balanced
      Compared to a DOHC V-6, the inline-six architecture offers greater efficiency from the reduced friction of operating only two camshafts and their associated valvetrain components. The I6 configuration offers the perfect balance of primary and secondary forces, without the need for balancing shafts.
      “In addition to reduced friction, the architecture enables smooth operation,” Menarini said. “The new Duramax 3.0L elevates the 2019 Silverado with one of the most refined and efficient diesel engines in the segment.”
      Along with supporting elements such as a tuned air induction system and other noise-attenuating elements, the 3.0L Duramax delivers exceptional quietness and smoothness at all engine speeds.
      All-aluminum construction and tough rotating assembly
      The 3.0L Duramax cylinder block is made of a cast aluminum alloy that provides the strength required to support the high combustion pressures that occur within a diesel engine, while also offering an approximately 25 percent mass savings over a comparable cast iron engine block. Iron cylinder liners are used within the aluminum block to insure truck durability.
      There are seven nodular iron main bearing caps that help ensure the block’s strength under those high combustion pressures, while also enabling accurate location of the rotating assembly. A deep-skirt block design, where the block casting extends below the crankshaft centerline, also contributes to the engine’s stiffness and refinement. It’s complemented by a stiffness-enhancing aluminum lower crankcase extension attached to the main bearing caps.
      The rotating assembly consists of a forged steel crankshaft, forged steel connecting rods and hypereutectic aluminum pistons. The alloys in the respective castings for the rods and pistons make them lightweight and durable. Silicon is blended with the aluminum for heat resistance and tolerance within the piston cylinders, which enhances performance and makes the engine quiet.
      A thick piston crown — the top of the piston — and reinforced top ring add strength to support the tremendous cylinder pressures enabled by turbocharging and the engine’s high 15.0:1 compression ratio.
      DOHC Cylinder Head and Rear Cam Drive
      Overhead camshafts offer a direct, efficient means of operating the valves, while four valves per cylinder activated by maintenance-free finger followers with hydraulic lash adjusters increase airflow in and out of the engine. This arrangement is integrated on the Duramax 3.0L’s lightweight aluminum cylinder head, which is topped with a lightweight composite cam cover that incorporates the crankcase ventilation and oil separation systems.
      A pair of lightweight, assembled camshafts actuates 28.35 mm diameter (1.12-inch) intake and 24.55 mm diameter (0.97-inch) exhaust valves. The camshaft drivetrain is uniquely located at the rear (flywheel side) of the engine, for greater refinement and packaging considerations for the comparatively long inline-six. A crankshaft-driven chain drives the high-pressure direct-injection fuel pump, while a chain driven by the fuel pump drives both intake and exhaust camshafts. A smaller belt drives the variable flow oil pump from the crankshaft.
      Additional Technology Highlights
      Variable geometry turbocharging enables the Duramax 3.0L engine to deliver class-leading horsepower with minimal effect on overall efficiency. The system uses closed loop controlled vanes position and sophisticated electronic controls to automatically adjust boost pressure to the desired value based on engine running conditions and instantaneous power demand. The liquid-cooled turbocharger features a low-friction ball-bearing shaft and is mounted close to the exhaust outlet of the engine for quicker spool-up of the turbine and quicker light-off of the exhaust catalyst. A water-to-air intercooling system produces a cooler higher density air charge for greater power. Maximum boost pressure is 43,5 psi (300 Kpa) absolute.
      Low-pressure EGR: The Duramax 3.0L utilizes new low-pressure Exhaust Gas Recirculation to optimize performance and efficiency. The EGR system diverts some of the engine-out exhaust gas and mixes it back into the fresh intake air stream, which is drawn into the cylinder head for combustion. That lowers combustion temperatures and rates.
      Traditionally, EGR systems in diesel applications recirculate exhaust gases between the two high-pressure points, the exhaust manifold(s) and intake manifold. However, it generally requires efficiency-robbing assistance from the turbocharger or other supporting elements to achieve the pressure differential required for sufficient EGR flow rates.
      The new low-pressure system adds to the high-pressure system, supporting continual adjustment of exhaust backpressure for more efficient operation. It recirculates gases between the low-pressure points in the exhaust system (downstream of the particulate filter) and after the compressor inlet.
      When the low-pressure EGR is activated by an electronically controlled valve, the engine burns exhaust gas that has already passed through the particulate filter. That increases the turbocharger’s efficiency, which helps overall vehicle efficiency without deteriorating the rate of particulate matter emitted by the engine.
      A variable intake manifold offers dual air intake pathways for each cylinder. Electronically controlled flaps — one for each cylinder — shorten or lengthen the airflow to each cylinder. This optimizes the airflow into the engine and improves performance and responsiveness across the rpm band, particularly at lower engine speeds.
      A variable-pressure oiling system with a continuously variable-displacement vane oil pump enhances efficiency by optimizing oil pressure as a function of engine speed and load. With it, the oil supply is matched to the engine requirements rather than the excessive supply of a conventional, fixed-displacement oil pump. The engine uses low-friction Diesel Dexos 0W20 oil.
      Oil jets located in the block are employed for performance and temperature control. They target the inner core of the piston with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, allowing the engine to produce more power and enhance long-term durability than engines without the technology.
      Active Thermal Management helps the engine warm up quickly to achieve and maintain its optimal engine temperature for performance and efficiency over the entire engine operating range. The system uses a three-actuator rotary valve system to distribute coolant through the engine in a targeted manner. It sends heat where it’s needed to warm up the engine to reduce friction and heat the passenger cabin or cools when needed for high-power operation. The Duramax 3.0L also features split cooling between the block and head.
      Common rail direct fuel injection of 2,500 bar (36,250 psi) helps generates class-leading horsepower and torque. The system’s pressure is generated by an engine-driven twin-piston pump sending fuel to solenoid-activated injectors with nine-hole nozzles that support precise metering of the fuel for a smooth idle and lower combustion noise. The fuel system is capable of multiple injections per combustion cycle — up to 10 times per injector — for more consistent and stable combustion performance that translates into smoothness and refinement, particularly at idle.   
      Electronic throttle valve: The Duramax 3.0L features an electronic throttle valve to regulate intake manifold pressure in order to optimize exhaust gas recirculation rates. It also contributes to a smooth engine shutdown via a more controlled method of airflow reduction.
      Ceramic glow plugs used in the Duramax 3.0L heat up more quickly and hotter than conventional metal-based glow plugs, helping the engine start and heat up more quickly in cold weather. The Duramax 3.0L achieves unassisted and assisted starting temperatures of -22 F (-30 C) and -40 F (-40 C) respectively.
      Stop/start technology helps optimize efficiency in city driving. The driver-selectable system shuts off the engine at stoplights and other stop-and-go situations. The engine automatically restarts when the driver takes their foot off the brake.
      ABOUT CHEVROLET
      Founded in 1911 in Detroit, Chevrolet is one of the world's largest car brands, doing business in more than 100 countries and selling more than 4.0 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.
      # # #
      2019 CHEVROLET SILVERADO 3.0L DURAMAX TURBO-DIESEL SPECIFICATIONS
      Type:
      Duramax 3.0L DOHC Turbo Diesel I6 
      Bore & Stroke (in. / mm):
      3.30 x 3.54 inches (84mm x 90mm)
      Block Material:
      Aluminum
      Cylinder Head Material:
      Aluminum
      Compression Ratio:
      15.0: 1
      Firing Order:
      1-5-3-6-2-4
      Valvetrain:
      Dual-overhead camshafts, four-valves per cylinder
      Air Delivery:
      Single variable-geometry turbocharger; intercooling system. 42.8-psi / 2.95 bar max boost
      Fuel Delivery:
      High-pressure, common-rail direct injection (36,250 psi / 2500 bar); electronic throttle valve
      Ignition System:
      Compression
      Max Engine Speed:
      5100 rpm
      Additional Features:
      Continuously variable oil pump; engine oil cooler, automatic stop/start, Active Thermal Management,
      Emissions Control:
      Low-pressure Exhaust Gas Recirculation (EGR); Selective Catalyst Reduction on Filter (SCRF)
      Horsepower
      (hp / kW @ rpm):
      277 / 204 @ 3750 (SAE certified)
      Torque
      (lb.-ft. / Nm @ rpm):
      460 / 624 @ 1500 (SAE certified)
       
    • By Drew Dowdell
      GM is delaying the launch of the new inline-6 diesel engine bound for the GMC Sierra 1500 and Chevrolet Silverado 1500.  No longer available for ordering on the 2019s, GM has pushed the availability into the 2020 model year. 
      According the GM, the emissions certification process on the engine is taking longer than normal.   Customers who ordered a 2019 Silverado or Sierra with the diesel engine will have their orders canceled and will need to resubmit the order for a 2020 model year vehicle once they become available for order.  GM has yet to open orders for 2020 truck models with the diesel engine, but a GM spokesperson said that it will be "soon".
      Assuming the current pricing holds, the 3.0 liter Duramax diesel will be priced $2,495 over a 5.3 liter V8 and $2,890 over the 4-cylinder 2.7-liter turbo. 
      Meanwhile for 2020, GM is expanding the availability of adaptive cruise control and the 10-speed automatic across the lineup.  At Chevy, the Silverado will now have the optional 6.2 liter V8 on five out of the eight trim levels.  The 6.2 V8 will be paired with the 10-speed automatic and available on the Custom Trail Boss, RST, LT Trail Box, LTZ, and High Country. At GMC, the CarbonPro box will be available at no additional cost when paired with certain other packages on the Sierra AT4 and Sierra Denali, while the double cab Sierra Elevation Trim will now also be available in a crew cab. 
       

      View full article
  • Social Stream

  • Who's Online (See full list)

  • My Clubs

About us

CheersandGears.com - Founded 2001

We ♥ Cars

Get in touch

Follow us

Recent tweets

facebook

×
×
  • Create New...