Lock-up control device for torque converter in automatic transmission for vehicle
An automatic transmission is described comprising a fluid type torque converter having an input member including a pump vane wheel and an output member including a turbine vane wheel, and an auxiliary transmission having one or plural stages of gear trains through which the torque of the output member is transmitted to driving wheels, a lock-up control device for a torque converter in an automatic transmission for a vehicle comprising a hydraulic direct coupling clutch having a slip characteristic provided between the input and output members of the torque converter and capable of mechanically coupling the both members and a modulator valve disposed in an oil passage for connecting an oil pressure cylinder of the direct coupling clutch with an oil pressure source. The modulator valve is composed of a valve body for opening and closing the oil passage, a spring for biasing the valve body in a valve-opening direction, a first oil pressure chamber for introducing pilot oil pressure for biasing the valve body in a valve-closing direction from an input port side of the modulator valve, and a second pilot oil pressure chamber for introducing pilot oil pressure for biasing the valve body in the valve-opening direction, wherein an output side of a device for generating oil pressure proportional to vehicle speed for releasing oil pressure which is changed proportional to the vehicle speed is connected through a throttle to the second pilot oil pressure chamber and a valve device for detecting the idle state of an engine throttle valve to release the second pilot oil pressure chamber to atmosphere is connected to the second pilot oil pressure chamber.
- Assignee:
- Honda Giken Kogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4589537
- OSTI ID:
- 5702303
- Resource Relation:
- Patent File Date: Filed date 14 Nov 1983
- Country of Publication:
- United States
- Language:
- English
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Direct-coupled control for a torque converter including a two stage speed responsive valve control
Direct-coupling control system for torque converter in automatic transmission for vehicles
Related Subjects
MECHANICAL TRANSMISSIONS
DESIGN
TORQUE
VEHICLES
CYLINDERS
GEARS
HYDRAULIC CONTROL DEVICES
LUBRICATING OILS
PRESSURE CONTROL
PUMPS
TURBINES
VALVES
WHEELS
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
LUBRICANTS
MACHINE PARTS
MACHINERY
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
TURBOMACHINERY
330602* - Vehicle Design Factors- Engine-Transmission Matching