Control system and method for controllable output type hydraulic fluid pump of automatic transmission providing decreased pump output in association with the engine starting condition

Patent · Tue Oct 27 00:00:00 EST 1987

OSTI ID:5978037

Nakamura, S; Kubo, S; Taga, Y

A control method of controlling output of a pump in a vehicle equipped with an internal combustion engine, a battery, a starter motor powered by the battery for starting up the engine, and a hydraulically actuated automatic transmission system including a hydraulic fluid pump for supplying pressurized fluid is described. The pump is adapted to be driven either by the engine or a pump drive motor powered by the battery. The method comprises the steps of: deciding whether or not the engine is being started by the starter motor; and decreasing the output of the pump when it is thus decided that the engine is being started.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Toyota
• Patent Number(s): US 4702083
• OSTI ID: 5978037
• Resource Relation: Patent File Date: Filed date 30 Oct 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
START-UP
MECHANICAL TRANSMISSIONS
PUMPS
AUTOMATION
CONTROL SYSTEMS
ELECTRIC BATTERIES
ELECTRIC MOTORS
HYDRAULIC FLUIDS
HYDRAULICS
OPERATION
PRESSURIZING
ELECTROCHEMICAL CELLS
ENGINES
FLUID MECHANICS
FLUIDS
HEAT ENGINES
MACHINE PARTS
MECHANICS
MOTORS
WORKING FLUIDS
330100* - Internal Combustion Engines