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These may improve fuel economy because the engine runs slightly lean as a consequence. However, running leaner than the manufacturer intended can cause overheating, piston damage, loss of maximum power and poor emissions (e.g., higher NOx due to higher combustion temperatures, or, if misfiring occurs, greater hydrocarbon emissions).
The statutory NO x limit for diesel passenger cars Euro 5 is 180 mg NO x /km. The Porsche Panamera equipped with the VW-EA897 engine, made by Audi, exhibited an 8.3-fold limit violation with an average NO x emissions of 1,498 mg/km, according to DUH. According to DUH data, the measurements were made at outside temperatures between +10 and +14 °C.
However, the engines had a significant shortcoming: they were based on the same block design as the gasoline engines. As such, the head bolts were not strong enough for a diesel engine, and soon gained a reputation for unreliability and poor performance that damaged the North American passenger car diesel market for the next 30 years.
The company claims to have helped more than four million people lose weight and it’s tagline is “Go Lose Weight, Go Look Great, Go Love Life.” It all adds up to the “GOLO” diet, created ...
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The U.S. government's auto safety agency is investigating a potential “loss of motive power” in more than 94,000 Jeep Wrangler 4xe vehicles, after receiving complaints for cars outside the ...
The complaint, seeking up to $46 billion in penalties for Clean Air Act violations, [298] alleged that Volkswagen equipped certain 2.0 and 3.0-litre diesel-engine vehicles with emissions cheating software, causing NO x pollution to exceed EPA's standards during normal driving conditions. It further claimed that Volkswagen entities provided ...
Because modern diesel engines often have a throttle, EGR can reduce the need for throttling, thereby eliminating this type of loss in the same way that it does for spark-ignited engines. In a naturally aspirated (i.e. nonturbocharged) engine, such a reduction in throttling also reduces the problem of engine oil being sucked past the piston ...