Hydraulic servo mechanism of automatic transmission for vehicle

Patent · Tue Jun 07 04:00:00 EDT 1988

OSTI ID:6911369

Sumiya, K; Sakaguchi, Y; Taga, Y; Kubo, S; Moroto, S

In a vehicle having an automatic transmission, a hydraulic servo control mechanism is described comprising: a hydraulic pressure source, a hydraulic servo; an accumulator; a drain oil line; interconnecting passage means providing a fluid path from the hydraulic pressure source to the hydraulic servo and from the hydraulic servo to the drain oil line; a selector valve, connected in the interconnecting passage means, for alternately connecting the hydraulic servo to the hydraulic pressure source and to the drain oil line; branch passage means connecting the accumulator to a portion of the interconnecting passage extending from the selector valve to the servo, the branch passage means meeting the portion of the interconnecting passage at a junction; first throttle means (R/sub 10/) in the branch passage means to connect the accumulator to the hydraulic servo; check valve means (q/sub 1/) in the branch passage means, and in parallel with the first throttle means, to connect the hydraulic servo to the accumulator; second throttle means (R/sub 20/), in the interconnecting passage means between the junction and the oil drain line; and relief valve means (V/sub r/), in the interconnecting passage means between the junction and the oil drain line, for adjusting the working oil discharge rate.

• Assignee: Aisin-Warner Ltd. and Toyota Jidosha Kabushiki Kaisha, Aichi
• Patent Number(s): US 4748809
• OSTI ID: 6911369
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
ACCUMULATORS
AUTOMATION
CONTAINERS
CONTROL EQUIPMENT
DRAINAGE
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
HEAT ENGINES
HYDRAULIC EQUIPMENT
HYDRAULICS
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MECHANICS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
RELIEF VALVES
SERVOMECHANISMS
TANKS
VALVES
VEHICLES