Servo apparatus for automatic speed control of vehicles

A servo apparatus (1) for automatic control of vehicle engine speed, in accordance with a speed error signal, has an electric motor (2) connectable to open the engine throttle against a restoring force, and the motor torque is controlled by varying the pulse width of the motor drive current (in 24)....

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	ALAN BAXTER MURRAY
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A servo apparatus (1) for automatic control of vehicle engine speed, in accordance with a speed error signal, has an electric motor (2) connectable to open the engine throttle against a restoring force, and the motor torque is controlled by varying the pulse width of the motor drive current (in 24). The pulse width is controlled by the error signal (in 32) through a feedback stabilised amplifier (29) and in addition, sampled motor emf (in 30) is used to control the pulse width during motor braking phases.