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Cordierite Diesel Particulate Filter on GM 7.8 Isuzu. Unlike a catalytic converter which is a flow-through device, a DPF retains bigger exhaust gas particles by forcing the gas to flow through the filter material before exiting; [2] [29] however, the DPF does not retain small particles.
1995 Cadillac Seville disengaged emissions controls whenever heat or air conditioning was on. In 1995, General Motors was ordered to recall 470,000 model year 1991 through 1995 Cadillacs and pay an $11 million fine for programming the car's electronic control unit (ECU) to enrich the fuel mixture any time the car's air conditioning or cabin heat was operating, since the EPA tests are conducted ...
If the average fuel economy of a manufacturer's annual fleet of vehicle production falls below its defined standard, the manufacturer must pay a penalty, then US$5.50 per 0.1 mpg under the standard, multiplied by the manufacturer's total production for the U.S. domestic market. [23] This is in addition to any gas guzzler tax, if applicable. [24]
California Attorney General Rob Bonta and the California Air Resources Board (CARB) entered a $25 million settlement with Bosch for its role in the diesel emissions cheating scandals at Volkswagen ...
Early in the 1950s scientists discovered that vehicle emissions were a significant factor that had been causing the air quality to deteriorate. [7] This led to the introduction of vehicle emissions standards in California in 1966, furthermore due to the seriousness of the problem, in 1970 the Clean Air Act was introduced in order to regulate these standards all over the United States. [7]
Catalytic converters remove only 20–40% of PM so particulates are cleaned up by a soot trap or diesel particulate filter (DPF). In the U.S., all on-road light, medium, and heavy-duty diesel-powered vehicles built after 1 January 2007, are subject to diesel particulate emission limits, and so are equipped with a 2-way catalytic converter and a ...
In one example, the agency fined Cruise, the self-driving startup owned by General Motors GM.N, $1.5 million in September for failing to report a 2023 incident in which a vehicle hit and dragged a ...
This was reported as a public health benefit between $580 million and $1.4 billion and saved operators 3.2 million US gallons (12,000 m 3) of fuel in 2008 (a cost savings of $8 million). The report stated that upwards of 14,000 diesel-powered engines were made cleaner under DERA, two-thirds of those being trucks and school buses through EPA ...