Fuel injector control system for a fuel injected internal...

Details Fuel injector control system for a fuel injected internal... Fuel injector control system for a fuel injected internal...

F - Mech Eng,Light,Heat,Weapons

02

D

341/38.14

F02D 28/00 (2006.01) F02D 41/06 (2006.01) F02D 41/26 (2006.01)

Patent

CA 1149911

- 26 - ABSTRACT A fuel injection control system utilizes a microprocessor to calculate and generate one or more logic control signals that determine the duration of the energization time of intermittently energized electromagnetic fuel injectors. The microprocessor has a number of inputs which are indicative of engine operation, such as intake manifold vacuum, engine crankshaft position and speed, engine operating temperature, and perhaps less important parameters. During engine cranking most of these parameters are not available. The invention overcomes this problem with the use of an analog computer that shares circuitry used by the microprocessor when the microprocessor is either in a default mode of operation or when the engine is being cranked.

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