Q: I took my car to my mechanic for the check engine light being on. He checked the codes and said it’s an “EGR fault” He said it would be a couple of days before he could get to it. He said I could ...

This is a preview. Log in through your library . Abstract One of the most vital factors in combustion control is Airto-Fuel Ratio (AFR) control and estimation. Various parameters such as intake air ...

Volvo developed Precision Flow exhaust-gas recirculation (EGR) to improve fuel economy by 3 percent even as they met EPA's 2007 emissions standards for on-road diesel engines. Volvo developed ...