AUTOMATIC SPEED CONTROL SYSTEM FOR A HEAVY VEHICLE

An automatic speed control for a heavy vehicle including a system control unit (10) which regulates communication between a compressed air source (18) and an air actuated throttle (19); the system control unit (10) generates control signals over lines (15,17) which are a function of a speed error si...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	O'KEEFE, PATRICK JOHN, RINI, GUY THOMAS, SCHUBERT, FRANK RICHMOND
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 CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES CONTROLLING CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS REGULATING ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	An automatic speed control for a heavy vehicle including a system control unit (10) which regulates communication between a compressed air source (18) and an air actuated throttle (19); the system control unit (10) generates control signals over lines (15,17) which are a function of a speed error signal and the position of the air actuated throttle (19) to regulate the compressed air source (18); the speed error signal is calculated as the difference between a commanded speed signal input from a pair of set and resume switches (34,36) and an actual speed signal (AVS); to generate the control signals, the speed error signal and throttle position signal (THL) are operated on inthe system control unit (10) by different lead-lag transfer functions, and these lead-lag terms are thereafter combined with a proportional speed error term to yield the desired control signals; according to the invention the system control unit (10) includes a cruise control means for controlling the vehicle speed to a commanded speed when the vehicle is moving, a throttle control means for controlling the engine speed when the vehicle is stationary and a mode control means for switching control of the system between the cruise control means and the throttle control means.