Method for controlling speed change for automatic transmission

Abstract

Abstract PURPOSE:To make an engine-torque changing control proper one suited to a traveling condition by carrying out the start of the change of engine torque by monitoring various sensors while making a backup control by means of a timer when said sensors are out of order. CONSTITUTION:Normally, the accomplishment of an engine-torque change starting condition is detected by the detecting means of a sensor system other than a timer, to carry out the change of engine torque. However, when said detecting means fail due to the failure of the sensor system, and the like, the change of engine torque is carried out by means of a timer as a backup. As a result, a proper torque changing control suited to a traveling condition can always be carried out, preventing a friction engaging device from being overloaded. Also, the sensor system for inputting signals into computers 40, 50, consists of various sensors as follows: an engine speed sensor 108, a throttle sensor 102, a car speed sensor 110, a pattern select sensor 120, an O2 sensor 106, a water temp. sensor 104, an intake temp. sensor 100, an oil temp. sensor, etc.

Inventors

• 👤 Kunihiro Iwatsuki
• 👤 邦裕 岩月
• 👤 Mitsuo Akashi
• 👤 明石　光生
• 👤 Yoshio Shindo
• 👤 新藤　義雄

Bibliographic Details