Fuel injection system with switchable starting mode

G - Physics – 05 – D

Patent

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341/38.14

G05D 7/06 (2006.01) F02D 41/06 (2006.01)

Patent

CA 1096013

ABSTRACT OF THE DISCLOSURE A multi-channel, sequentially timed fuel injection system for an internal combustion spark ignited engine employs a solenoid actuated injector valve for each cylinder controlled by the outputs of separate variable width pulse generators. The pulse generators each employ a resistance-capacitance discharge timing circuit and a single thermistor, common to all the generators, sensitive to engine temperature is connected to the RC circuits of the generators in a first circuit con- figuration during starting of the engine which provides a wide range of fuel delivery rates for starting and in a second cir- cuit configuration during normal operation in which the various RC circuits are isolated from one another so that interaction. of the variable width pulse generators does not occur as a result of the common thermistor connection during normal engine operation.

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