1
Julian N Smith, James M Lawlis: Automatic vehicle headlamp dimming control. General Motors Corporation, Robert M Sigler, February 23, 1988: US04727290 (179 worldwide citation)

An automatic vehicle headlamp dimming control is the type having an operator controlled first voltage divider across a power supply, a light sensitive resistance connected in electrical series with an electrically controlled variable resistance in a second voltage divider across the output of the fi ...


2
William D Route, John T Auman, Wesley A Rogers: Vehicle operator security system. General Motors Corporation, Robert M Sigler, March 6, 1979: US04143368 (143 worldwide citation)

A portable infrared signal generator is actuatable by a motor vehicle operator at a distance from the vehicle to generate digitally coded infrared signal pulses in accordance with either a first or a second predetermined digital code. A receiver on the motor vehicle is effective to receive the infra ...


3
Peter James Schubert, Michelle Lee Copeland: Holographic object position and type sensing system and method. Delphi Technologies, Robert M Sigler, March 12, 2002: US06356854 (122 worldwide citation)

Systems and methods for determining the position and classification of an object and which may provide signals that control deployment of an active restraint device, for example. Using a pulsed laser light beam from a laser source that is spread and preferably diffused to avoid ocular damage, an int ...


4
John L Harned, Donald F Herrick: Engine and engine spark timing control with knock limiting etc.. General Motors Corporation, Robert M Sigler, January 11, 1977: US04002155 (118 worldwide citation)

In a spark ignition internal combustion engine, an accelerometer is mounted on an engine component, preferably the intake manifold, and senses vibration including individual ringing vibrations due to engine knock or detonation. A reference signal is derived from the accelerometer signal during the p ...


5
Wendell D Creps: Engine with dual sensor closed loop fuel control. General Motors Corporation, Robert M Sigler, February 24, 1976: US03939654 (116 worldwide citation)

In a closed loop fuel control system for an internal combustion engine having a catalytic converter in its exhaust system, a first zirconia sensor in the exhaust system upstream from the catalytic converter generates a signal indicative of air-fuel ratio in gases before catalytic treatment, a second ...


6
Kevin S Kidston, Brendan M Conlon: Electric vehicle with regenerative and anti-lock braking. General Motors Corporation, Robert M Sigler, April 1, 1997: US05615933 (98 worldwide citation)

A vehicle has an electric propulsion motor, a regenerative brake control and an anti-lock friction brake system which responds to excess wheel slip of a front wheel during braking to modulate friction braking torque to reduce the excess wheel slip. It further has a control responsive to activation o ...


7
John O Rice: Fuel control with learning capability for motor vehicle combustion engine. General Motors Corporation, Robert M Sigler, November 25, 1980: US04235204 (92 worldwide citation)

A motor vehicle combustion engine has exhaust apparatus including a sensor for sensing exhaust content therein and fuel control apparatus determining fuel supply to the engine in accordance with an engine operating condition and a trimming factor which is a function of the engine operating condition ...


8
Bruno P B Lequesne: Variable lift operation of bistable electromechanical poppet valve actuator. General Motors Corporation, Robert M Sigler, May 16, 1989: US04829947 (90 worldwide citation)

A valve actuating device for an internal combustion engine is operated with partial valve lift. The valve is spring biased toward a neutral central position but held in full open or closed positions by permanent magnets having associated coils. Normal activation of the valve between full open and cl ...


9
Balarama V Murty: Electric, variable damping vehicle suspension. General Motors Corporation, Robert M Sigler, March 28, 1989: US04815575 (82 worldwide citation)

An electric, variable damping suspension for a motor vehicle comprises a three phase rotary electric alternator, a ball screw and nut apparatus connecting the sprung and unsprung masses and driving the alternator in alternating rotary directions as the sprung and unsprung masses oscillate relative t ...


10
Robert A Martin: Vehicle headlamp beam control. General Motors Corporation, Robert M Sigler, July 8, 1986: US04599544 (81 worldwide citation)

A control for a motor vehicle headlamp system includes a silicon photovoltaic diode in a short circuit connection across the inputs of an operational amplifier. The diode is disposed behind a lens and baffle to respond only to the light from oncoming vehicles and not to that reflected from roadside ...