HYDRAULIC CIRCUIT OF AUTOMATIC TRANSMISSION

Title:

HYDRAULIC CIRCUIT OF AUTOMATIC TRANSMISSION

Document Type and Number:

Japanese Patent JPH0626568

Kind Code:

A

Abstract:

PURPOSE: To promote the simplification of structure in a hydraulic circuit controlling the clamping force of a lockup clutch and a reduction in the cost of production.

CONSTITUTION: A lockup control valve 50 regulating a pressure differential between clamping pressure, in a clamping side oil chamber 30a of a lockup clutch 30, and releasing pressure in a releasing side oil chamber 30b, is controlled by a duty control type solenoid valve SOL2. A low reducing valve 60 controlling a low and reverse brake 25 operates at its timing different from clamping force control timing in the lockup clutch 30, and a solenoid valve controlling this low reducing valve 60 is used in common with the duty solenoid valve SOL2.

Inventors:

TAKADA HIROSHI
ODA JUJIRO
MATSUMOTO AKIO
DOI JUNICHI
KANBARA HIDETOSHI

Application Number:

JP17847392A

Publication Date:

February 01, 1994

Filing Date:

July 06, 1992

Export Citation:

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Assignee:

MAZDA MOTOR

International Classes:

F16H61/08; F16H61/14; (IPC1-7): F16H61/14; F16H61/08

Attorney, Agent or Firm:

Hiroshi Maeda (2 outside)

Next Patent: SYSTEM FOR TRANSMISSION OF TALKIE