Process and electronic internal combustion engine control system

Details Process and electronic internal combustion engine control system Process and electronic internal combustion engine control system

1991-02-11

1991-12-31

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

F02M 5100

Patent

active

050762389

ABSTRACT:
With a process and an apparatus for cold-start control in an electronic internal combustion engine system, the combustion chambers of the internal combustion engine are supplied, during starting, with the increased fuel feed. The fuel feed per an ignition interval (TD.sub.n) is effected by a plurality of short cold-start injection pulses generated at increased frequency at linear time intervals with respect to one another in respective ignition intervals. This frequency control replaces the normal formation of fuel injection pulses corresponding to half-periods of crankshaft rotation, during starting, and is cancelled upon commencement of preset fuel reduction thresholds. Owing to the fuel atomisation attained, there results a spontaneously ignitable mixture, so that a cold start is still possible even at extremely cold temperatures.

REFERENCES:
patent: 4683859 (1987-08-01), Tamura et al.
patent: 4691680 (1987-09-01), Staerzl
patent: 4719885 (1988-01-01), Nagano et al.
patent: 4765300 (1988-08-01), Fujimura et al.
patent: 4785771 (1988-11-01), Ibuki et al.
patent: 4873950 (1989-10-01), Furuyama
patent: 4998522 (1991-03-01), Achleitner
patent: 5009211 (1991-04-01), Kusbida et al.

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