1
Lewis R Hetzler, Gerald O Huntzinger, William P Winstead III, Thomas A Zickel: Digital ignition spark timing angle control with read only memory. General Motors Corporation, Richard G Stahr, March 1, 1977: US04009699 (64 worldwide citation)

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 ...


2
Donald E Graham, Paul J Long Jr: Motor vehicle level control circuit. General Motors Corporation, Richard G Stahr, August 8, 1978: US04105216 (56 worldwide citation)

Electrical circuits responsive to a logic signal pair produced when the sprung mass of a motor vehicle is above a selected trim band and to another logic signal pair produced when the sprung mass of the vehicle is below the trim band produce respective sprung mass high and sprung mass low signals fo ...


3
John G Neuman, Richard W Johnston: Internal combustion engine ignition system. General Motors Corporation, Richard G Stahr, March 23, 1976: US03945362 (49 worldwide citation)

An internal combustion engine ignition system wherein both arc-creating and arc-maintaining voltages are applied to the spark plug or plugs through a single ignition transformer energized through a single primary circuit in the well-known "Kettering" circuit. A switch in the primary circuit, prefera ...


4
William C Woodruff, Dennis M Lombardo, Theodore H Horrell Jr: Diesel engine warm-up control system. General Motors Corporation, Richard G Stahr, May 9, 1978: US04088109 (41 worldwide citation)

Upon the closing of the ignition circuit, this Diesel engine warm-up control system operates to establish a glow plug energizing circuit; to energize a "wait" indicator lamp and to produce a timed glow plug energization cycle signal. Upon the termination of this signal, the glow plug energizing circ ...


5
Donald F Angi, William D Cornwell Jr: Electric motor having radio frequency interference radiation suppression. General Motors Corporation, Richard G Stahr, May 11, 1982: US04329605 (39 worldwide citation)

Two spaced capacitors are connected in parallel across each supply lead of a brush-commutator type electric motor and the motor frame to provide a PI filter for each brush in which the length of brush lead between the capacitors comprises the inductor element of the filter. To facilitate this arrang ...


6
Donald E Graham: Motor vehicle level control circuit. General Motors Corporation, Richard G Stahr, September 25, 1979: US04168840 (37 worldwide citation)

An optical switching arrangement including at least one light source connected in a cyclically completed and interrupted electrical energizing circuit and a pair of photosensitive signal generating devices optically coupled thereto through a shuttering arrangement operated by the sprung mass of a mo ...


7
Allan E Laubenstein, Donald V Starich, Mitchell L Brown: Peak cylinder combustion pressure ignition spark timing system. General Motors Corporation, Richard G Stahr, May 8, 1979: US04153019 (33 worldwide citation)

The ignition spark events of the cylinders of an internal combustion engine are timed to provide peak cylinder combustion pressure at a predetermined engine crankshaft angle relative to piston top dead center. The engine crankshaft angle at which the peak cylinder combustion pressure of a selected m ...


8
Ronald L Colling, Myron U Trenne, Timothy R Schlax: Digital electronic ignition spark timing system. General Motors Corporation, Richard G Stahr, October 11, 1977: US04052967 (31 worldwide citation)

The output signal pulses of a constant frequency oscillator are counted between successive timing signals, each of which corresponds to a cylinder of an associated internal combustion engine. The total number of pulses counted during each count period is stored and employed to derive an engine speed ...


9
Curtis D Munden, Robert E Campbell: Dual action internal combustion engine ignition system. General Motors Corporation, Richard G Stahr, August 3, 1976: US03972315 (31 worldwide citation)

The energizing circuit of one of the primary windings of an ignition coil having at least two primary windings and a secondary winding is interrupted in timed relationship with the engine whereby a high ignition arc-creating potential is induced in the secondary winding upon each interruption of the ...


10
Richard N Lehnhoff, Dennis J Ricker: Voltage regulator. General Motors Corporation, Richard G Stahr, October 5, 1976: US03984755 (30 worldwide citation)

A direct current ramp potential signal which is produced in synchronism with each half cycle of the alternator output voltage and increases in magnitude within a predetermined range during each half cycle is compared with a direct current reference potential signal inversely proportional to alternat ...