System for optimizing the timing of diesel or spark ignition eng

Details System for optimizing the timing of diesel or spark ignition eng System for optimizing the timing of diesel or spark ignition eng

1983-09-06

1986-03-11

Lall, Parshotam S.

Boots, shoes, and leggings

123419, 123436, G05B 1302, F02P 508

Patent

active

045758000

ABSTRACT:
An adaptive electronic control system in which a machine control parameter is oscillated (dithered) back and forth on either side of a given setting of such machine control parameter, with the period of the dithering being in synchronism with the natural cycle of the machine, whereby the changes in the control system's error signal due to normal speed changes of the machine itself are minimized or eliminated. When applied to a spark ignition of a gasoline engine or the injection timing on a diesel engine, the timing is advanced and retarded in synchronism with the rotation of the engine's shaft such that each phase of the dither cycle includes an equal number of complete engine cycles. The effect on engine speed occasioned by the dithering of the machine control parameter is then computed and an error signal is produced which is used to further adjust the parameter control setting in a direction to optimize performance of the machine. The system may be implemented by using a properly programmed microprocessor or, alternatively, can be implemented with discrete digital logic components.

REFERENCES:
patent: 4026251 (1977-05-01), Schweitzer et al.
patent: 4236214 (1980-11-01), Sasayama
patent: 4306284 (1981-12-01), Malcolm
patent: 4379333 (1983-04-01), Ninomiya et al.
patent: 4428342 (1984-01-01), Suzuki et al.
patent: 4448171 (1984-05-01), Ninomiya et al.
patent: 4467765 (1984-08-01), Suzuki et al.
patent: 4479476 (1984-10-01), Suzuki et al.
"Electronic Optimizer Control for I.C. Engine: Most MPG for any MPH" by P. Schweitzer et al., SAE, Feb. 75, Warrendale, Pa.

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