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 · Mon Oct 26 23:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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