Automatic transmission with anti creep device

Patent · Tue Aug 18 00:00:00 EDT 1987

OSTI ID:6253987

Aoki, T; Sato, Y; Fukuda, Y

An automatic transmission is described comprising: (a) a fluid coupling; (b) a mechanical transmission mechanism coupled to the fluid coupling; (c) a transmission control system comprising: (d) means for producing a signal representative of engine output; and (e) an anti creep means for varying the actuating hydraulic fluid pressure for a one of the friction engagement mechanisms which is engaged for providing the lowest speed stage, according to the signal representative of engine output, from a low value when engine output is low upward as engine output increases; (f) the anti creep means comprising: (g) an anti creep valve having at least a first pressure chamber and a second pressure chamber, (h) an override valve having at least a first pressure chamber and a second pressure chamber, (i) anti creep valve means for communicating hydraulic fluid pressure from the one of the friction engagement mechanisms to the override valve, (j) override valve means for communicating the hydraulic fluid pressure from the one of the fluid engagement mechanisms to the anti creep valve, the communicating means integral with the override valve operative to selectively permit anti creep action, (k) a fluid conduit system providing communication between the first pressure chamber of the anti creep valve and the second pressure chamber of the override valve for substantially terminating anti creep action when the engine output is at a predetermined level, (l) means for varying the rate of application of anti creep action, and (m) the varying means comprising a throttle means and one-way valve means communicating with the anti creep valve for rapidly terminating anti creep action when the engine output is at a predetermined level and slowly restoring anti creep action when the engine output is below the predetermined level.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4686872
• OSTI ID: 6253987
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
CREEP
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FRICTION
MACHINE PARTS
MECHANICAL PROPERTIES
MECHANICAL TRANSMISSIONS
PRESSURE CONTROL
SIGNALS
VALVES
VEHICLES