Vehicular automatic transmission control system

Patent · Tue May 30 00:00:00 EDT 1989

OSTI ID:5576720

Kondo, H

This patent describes a vehicular automatic transmission control system. The control system consists of: a hydraulic control circuit including a hydraulic pressure source, a pressure regulator valve for producing a line pressure by regulating the oil pressure supplied from the pressure source, a number of shift valves for selectively engaging and releasing friction members of the automatic transmission according to operating conditions of a vehicle such as vehicle speed and throttle opening rate, and a solenoid valve blocking switching operation of a highest shift valve toward a highest gear position of the transmission; an electronic control circuit for controlling on- and off- ranges of the solenoid valve, including a manual mode switch, which is a momentary switch, for setting the control of the automatic transmission either in a highest gear non-cancel mode permitting shifts to the highest gear position or in a highest gear cancel mode inhibiting shifts to the highest gear position and forcibly effecting a downshift when selected during operation in the highest gear position, a vehicle speed sensor, and a kickdown switch detecting a throttle opening rate greater than a predetermined value; a frequency divider for inputting outputs of the manual switch.

• Assignee: Aisin-Warner Limited
• Patent Number(s): US 4833945
• OSTI ID: 5576720
• Resource Relation: Patent File Date: 27 Mar 1984
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MECHANICAL TRANSMISSIONS
COMPUTERIZED CONTROL SYSTEMS
AUTOMATION
DESIGN
ELECTRONIC CIRCUITS
HYDRAULICS
PRESSURE CONTROL
VALVES
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
MACHINE PARTS
MECHANICS
330602* - Vehicle Design Factors- Engine-Transmission Matching
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)