Kabushiki Kaisha Komatsu Seisakusho

Terukazu Ito

Teruo Minami

Kiyoharu Nakao

Masaru Uenoyama

The control apparatus is capable of setting an automatic speed changing point corresponding to the output of the throttle position of an internal combustion engine and changing an automatic speed change range in accordance with an operation mode of a range select lever. The control apparatus is further capable of setting upper and lower limit speeds of the automatic speed change range.

Automatic speed change control apparatus

In an electronic control apparatus of an automatic speed changing apparatus for use in an internal combustion engine of the type wherein the engine is connected with a load through a fluid type torque converter and a multiple stage gear changer, there are provided means for locking-up the torque converter when the speed of the output shaft thereof exceeds a first predetermined speed, means for shifting-up the gear changer to a higher stage when the speed of the output shaft exceeds a second predetermined speed which is higher than the first predetermined speed, and means for shifting-down the gear changer to a lower stage when the speed of the output shaft decreases below a third predetermined speed which is lower than the first predetermined speed whereby effecting automatic speed change control while the torque converter is maintained in the locked-up condition.

Growing community of inventors

Isehara, Japan

Terukazu Ito