A combustion control apparatus operates an internal combustion engine in a split retard combustion mode during regenerating an exhaust purifier such as a particulate filter. In the split retard combustion mode, the combustion control apparatus controls a f...

An oxidation catalyst (12) is disposed in an exhaust passage (11) positioned upstream of a DPF (13), the oxidation catalyst (12) is used to cause combustion of a post-injection fuel, and heat generated in the combustion is utilized to raise the temperature...

Particulate amount detecting means is provided for directly or indirectly detecting the amount of particulate trapped in the particulate filter (12), and fuel injection pressure controlling means reduces the fuel injection pressure from the fuel injection ...

An engine including a recirculation passage, which connects an exhaust passage to an intake passage, and an EGR valve arranged in the recirculation passage. An electronic control unit (ECU) obtains a target opening degree of the EGR valve in accordance wit...

A sensor (55) detects a parameter expressing the oxygen concentration or oxygen amount in gas aspirated into the diesel engine (51). A controller (41) calculates a target parameter during a steady running state of the diesel engine (51) (S4) and calculates...

The exhaust duct 28 of a direct-injection engine 1 is provided with three-way catalyst 32 and a lean NOx catalyst 33 are arranged in that order from the upstream side. Switching between a stratified combustion state at a stratified combustion region (I) of...

Under smoothly changing load conditions a servo-unit controlling the exhaust gas feedback valve responds to a signal derived from the engine speed and load demand signal. Under acceleration the load demand signal is compared to a threshold value. if this i...

An engine comprising an exhaust gas after-treatment device arranged in an exhaust passage of the engine, which raises the temperature of the exhaust gas after-treatment device by making selective use of a first injection pattern injecting only main fuel an...