Determination of wall wetting for a port injected engine

Details Determination of wall wetting for a port injected engine Determination of wall wetting for a port injected engine

1997-05-27

1999-08-10

Dombroske, George

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

731173, 73119A, 123480, 701103, 701109, G01M 1500, F02D 4114

Patent

active

059351888

ABSTRACT:
A method is provided for determining wall wetting for an engine which includes running a multi-cylinder engine at a predetermined speed and load. The fuel delivery and spark to one of the cylinders is then interrupted. The hydrocarbon level exhausted from the cylinder is then measured for a predetermined number of engine cycles. The test results can then be curve fitted to the relationship HCPPM=(A+B* engine cycle).sup.(1/exp). In this relationship, HCPPM is the hydrocarbon count in parts per million, A and B are each constants, and the exponent exp is derived using an iterative process. The exponent which is derived is the main qualifier for wall wetting.

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