Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-08-04
1983-10-04
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Fuel injection system
123478, 123490, 123299, F02B 3300, F02B 300
Patent
active
044072511
ABSTRACT:
A fuel supply control system for an engine includes a controller and a fuel supply line. In one embodiment, at least two parallel connected control valves are arranged in the line and are changed between open and closed states when energized by a drive signal. A sensor is provided for detecting an engine operating condition. A generator is provided for producing a random designation signal indicating any one of the different control valves. The controller produces a pulse train as the drive signal for the control valves in response to the output signal of the sensor so that the duty cycle of the pulse train varies with the engine operating condition. The controller distributes each pulse of the drive signal to any one of the control valves designated by the random designation signal of the generator to open the designated control valve so that any one of the control valves is opened in a random sequence. In a second embodiment, the number of the control valves may be one. In this case, each pulse-width of the drive signal changes at random within a relatively small range in response to the random signal from the generator.
REFERENCES:
patent: 3423683 (1969-01-01), Kelsey et al.
patent: 3996915 (1976-12-01), Demetrescu
patent: 4140088 (1979-02-01), Vulpillieres
patent: 4176627 (1979-12-01), Bassi
patent: 4196702 (1980-04-01), Bowler
patent: 4235205 (1980-11-01), Fukui
patent: 4257376 (1981-03-01), Wen
patent: 4269157 (1981-05-01), Fujishiro
patent: 4289104 (1981-09-01), Takada
Cox Ronald B.
Nissan Motor Company Ltd.
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