William P Winstead

US Patent:

43513069, Sep 28, 1982

Filed:

May 26, 1981

Appl. No.:

6/267269

Inventors:

James E. Luckman - Anderson IN
William P. Winstead - Alexandria IN
John L. Kastura - Kokomo IN

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02P 304

US Classification:

123609

Abstract:

The values of dwell and ignition timing signals from which ignition dwell and spark timing are provided are controlled to minimize power dissipation in an electronic ignition system and to ensure that adequate dwell times are provided during engine acceleration conditions and large advance angle increases. The dwell signal is increased from a static dwell value during steady state engine operation to a higher value in response to sensed engine accelerating conditions and the change in the spark advance between ignition events is limited to ensure that an adequate dwell period is provided.

US Patent:

40096998, Mar 1, 1977

Filed:

Jan 19, 1976

Appl. No.:

5/650164

Inventors:

Lewis R. Hetzler - Anderson IN
Gerald O. Huntzinger - Anderson IN
William P. Winstead - Anderson IN
Thomas A. Zickel - Anderson IN

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02P 100

US Classification:

123117D

Abstract:

A read only memory is pre-programmed to produce an output binary signal representation of a predetermined ignition spark timing angle based upon the instantaneous value of both of two selected engine operating parameters at each of a plurality of respective selected points within the range of values in response to respective input address signals. Over the range of values of the two selected engine operating parameters, therefore, the read only memory generates a three-dimensional surface of ignition spark timing angles. The binary signal representations of the ignition spark timing angles retrieved from the read only memory are varied in accordance with engine manifold vacuum and actual atmospheric pressure to tilt the three-dimensional surface generated by the read only memory about a selected engine parameter value as an axis in an amount substantially inversely proportional to actual atmospheric pressure.