ENGINE WITH CETANE NUMBER DETERMINATION DEVICE Russian patent published in 2010 - IPC F02D45/00 

FIELD: engines and pumps.

SUBSTANCE: proposed engine comprises cetane number determination device that includes the appliance of determining engine crankshaft angular speed. Amplitude of angular speed makes a standard criterion of cetane number estimation and is set proceeding from engine rpm and amount of injected fuel. Variation in angular speed amplitude defined by aforesaid device is compared with standard magnitude. Additionally, the engine comprises: device to determine engine load, engine rpm determination device, device to determine the amount of injected fuel that calculates at least one amount of injected fuel, the number of fuel injection and fuel injection pressure with respect to standard fuel proceeding from load determined by aforesaid devices, and fuel injection correction device to correct the amount of injected fuel after the amount has been determined, the fuel injection number if the latter has been determined, and fuel injection pressure is it has been determined proceeding from cetane number determined by the device of determining said number. In compliance with another version, the engine comprises additionally variable-capacity blower to vary back pressure or boost pressure, and boost pressure control device that controls back pressure or boost pressure proceeding from cetane number as determined by appropriate device.

EFFECT: invention allows revealing and controlling fuel injection proceeding from revealed variation in cetane number.

8 cl, 12 dwg