Engine control system

Details Engine control system Engine control system

1984-05-31

1985-08-20

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123425, 123486, F02D 3702

Patent

active

045357404

ABSTRACT:
The invention describes a control system in which open loops control the mixture strength and spark timing by means of look-up tables (14, 12) stored in a computer and a closed loop (16, 18, 20, 24) with much greater response time corrects the air fuel ratio to compensate for long term drift in the open loops under the control of an ionization sensor sensitive to the duration of the burn period. The ionization sensor output is used only in operating ranges where its output accurately reflects the burn period duration.
Consequently, the high speed response of an open loop is achieved at the same time as the long term stability of a feedback loop sensitive to the burn period duration.

REFERENCES:
patent: 4130097 (1978-12-01), Ford
patent: 4216750 (1980-08-01), Kobayashi
patent: 4304203 (1981-12-01), Garcea et al.
patent: 4314534 (1982-02-01), Nakajima et al.
patent: 4377140 (1983-03-01), Latsch
patent: 4417556 (1983-11-01), Latsch
patent: 4465046 (1984-08-01), May

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