Patent ID: 7063072

Claim:
Internal combustion engine, comprising one or more cylinders with individual combustion chambers, a fuel injector opening into each combustion chamber, individual fuel pump means for each injector for feeding fuel to the respective injector, an exhaust conduit leading from the respective combustion chamber and opening into a device for post-treatment of exhaust, a cam shaft driven by the engine crankshaft with a cam element for one or more fuel pump means, said cam element having a cam curve shaped to provide, once per operating cycle, a pump stroke in the associated fuel pump means and an electronic control unit, arranged to control a spill valve and a needle control valve, coordinated with each injector, for controlling the injection amount and point in time during the respective pump stroke as a function of various control parameters fed into the control unit, characterized in that the cam curve ( 13 ) is shaped so that an opening pressure is maintained in the fuel injector ( 6 ) for so long during one cycle that fuel injection is permitted at least so late that combustion does not occur in the cylinder, and that the control unit ( 15 ) is arranged to control the spill valve ( 9 a ) and the needle control valve ( 9 b ), so that at least a first amount of fuel can be injected during the compression stroke of the engine and, depending on said control parameters, at least one additional amount of fuel can be injected later and be transported, in an uncombusted state, with the exhaust to the device ( 61 ) for post-treatment of exhaust.