Process for controlling a lean burn I.C. engine (10) of a vehicle containing a catalyst (14, 16) comprises acquiring the actual crude emission of at least one exhaust gas component of the engine; and determining the reliable lean temperature region dependi...

The invention relates to the starting of an internal combustion engine comprising an exhaust aftertreatment device that requires a minimal threshold temperature for proper operation. Within a certain period of time after engine start, first the load of an ...

A temperature estimating apparatus for an internal combustion engine is provided for correctly calculating the temperature of an exhaust device even when the internal combustion engine is started under low temperature conditions. The temperature estimating...

To further promote the catalyst light-off over the conventional apparatus in this kind without deteriorating emission performance and fuel efficiency. A tumble generating means (10, 27, 28), a fuel injector (18) which injects fuel in the direction opposite...

The process regenerates a diesel engine exhaust catalytic converter with a honeycomb structure devoid of filter function. In the process, the exhaust gas catalyst inlet temperature is raised to above 450 degrees C, incinerating the soot and hydrocarbons to...

The method involves determining the catalyst cooling characteristic a during an engine lean phase. A lower temperature limit is fixed with respect to the catalyst operation temperature. At least one minimum heating temperature is determined, from which the...

An exhaust temperature raising apparatus has an exhaust throttle valve (15) that adjusts the engine exhaust amount based on the amount of throttling, and an injector (12) that performs main injection and a sub-injection directly into a cylinder, a combinat...