Internal-combustion engines – Engine speed regulator – Open loop condition responsive
Patent
1995-05-08
1996-06-18
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Open loop condition responsive
F02D 910, F02D 1110
Patent
active
055267874
ABSTRACT:
A closed-loop controller implemented by an engine control microprocessor for adjusting the position of the intake throttle of an engine. Sensors, typically shared with other engine control mechanisms, develop electrical signal values indicating intake air pressure and temperature as well as the pressure within the intake manifold. A programmed microcontroller responsive to these signal values, and to a value indicating a desired rate of air flow into the engine, produces a further value representing a desired throttle position. A comparator is used to produce an error signal indicating the extent to which the measured actual air flow rate value deviates from the desired flow rate value. Finally, a closed-loop feedback control mechanism jointly responsive to this error signal and to the desired throttle position value operates a mechanism which controls the throttle position, thereby maintaining a close correspondence between the actual and desired air flow rates.
REFERENCES:
patent: 4549517 (1985-10-01), Kamiyama
patent: 4763264 (1988-08-01), Okuno et al.
patent: 4799467 (1989-01-01), Ishikawa et al.
patent: 4881502 (1989-11-01), Kabasin
patent: 5349932 (1994-09-01), Boverie et al.
patent: 5406920 (1995-04-01), Murata et al.
Argenbright Tony M.
Ford Motor Company
Lippa Allan J.
May Roger L.
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