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EPA AED estimates emissions controls were removed from > 550K diesel pickups over last decade; impact equivalent to adding 9M additional trucks

Green Car Congress

In a new report , the US Environmental Protection Agency (EPA) Air Enforcement Division (AED) estimates that the emissions controls have been removed from more than 550,000 diesel pickup trucks in the last decade. The AED report includes only tampering that involves the complete removal and disablement of emissions controls hardware.

EPA 468
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Argonne helps optimize piston bowl design for Caterpillar heavy-duty engines using high-performance computing

Green Car Congress

Argonne National Laboratory is helping Caterpillar improve efficiency and reduce emissions in their heavy-duty diesel engines. Heavy-duty diesel engines still power most large vehicles used in the construction, mining and transportation industries in the United States. The workflow we developed will benefit everyone.

Design 459
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New Emissions Analytics study suggests pollution from tire wear now 1,850 times worse than exhaust emissions

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In early 2020, UK-based independent testing firm Emissions Analytics published a study claiming that tire particulate wear emissions were 1,000 times worse than exhaust emissions ( earlier post ). —Emissions Analytics. Quoting such ratios, however, needs careful interpretation.

Exhaust 539
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Volkswagen 2.0 TDI diesel for Euro 6d; SCR twin-dosing

Green Car Congress

TDI diesel for Euro 6d; SCR twin-dosing. Volkswagen continues to refine its most important diesel engine, the 2.0-liter With SCR twin dosing technology in the exhaust gas system, the diesel unit now undercuts the Euro 6d emission standard limits while also running quietly and smoothly, according to the company.

Diesel 435
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ORNL team achieves diesel-like efficiency with SI engine

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A team at Oak Ridge National Laboratory (ORNL) has achieved diesel-like efficiency in a single-cylinder spark-ignition (SI) research engine while maintaining compatibility with stoichiometric 3-way catalyst (TWC) systems. The unique high stroke-to-bore engine design (1.5:1) The unique high stroke-to-bore engine design (1.5:1)

Diesel 468
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FCA US LLC to pay ~$300M in criminal penalties over diesel emissions test cheating

Green Car Congress

liter diesel engine for use in FCA US’ Jeep Grand Cherokee and Ram 1500 vehicles that would be sold in the United States. liter diesel engine for use in FCA US’ Jeep Grand Cherokee and Ram 1500 vehicles that would be sold in the United States. liter diesel program’s goals, timing, and marketing strategy.

Emissions 344
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Optimized heavy-duty CI engine fueled with DME delivers diesel performance, significantly reduces engine-out emissions

Green Car Congress

A team from Empa - Swiss Federal Laboratories for Materials Science and Technology and FPT Motorenforschung reports in an open-access paper in the journal Fuel on the performance and emission characteristics of an 11-liter heavy-duty compression ignition engine which was optimized specifically for DME (dimethyl ether) combustion.

Engine 368