Honda Giken Kogyo Kabushiki Kaisha

Takeyuki Shimizu

Sadanori Nishimura

Masakazu Maezono

Yoji Yamada

Keiichi Ishikawa

Masaru Yamashita

An apparatus for controlling a multi-speed, oil pressure operated type vehicle transmission connected to an engine through a torque converter wherein each drive train includes an oil pressure operated clutch and the low speed drive train also includes a one-way clutch engagement element, such as an oil pressure clutch or the like, interposed in each of said driving trains such that each driving train is established by oil supply to each said clutch. The apparatus includes a holding device for the highest speed drive train which is actuated when the brake operation is detected and the vehicle is stopped, which actuation provides a pressurized oil supply to the highest speed oil pressure operated clutch interposed in said high speed drive train to minimized the torque transmitted from the engine even though the pressurized oil is continuously supplied to the low speed oil pressure clutch interposed in said low speed driving train.

Brake and speed responsive controlled transmission

There is disclosed a relief valve apparatus for an oil pressure operated clutch having an oil pressure operation chamber, the apparatus comprising a weight in combination with a leaf spring wherein the weight, during rotation of the clutch, is subjected to a centrifugal force and, under the influence thereof, promotes a valve opening force of the leaf spring itself to permit the discharge or dumping or oil contained within the chamber.

Check valve apparatus for oil pressure operated clutch

The present invention discloses a control apparatus for an oil pressure operated transmission in an automotive vehicle. The apparatus comprises a transmission with at least two stages of low speed and high speed forward driving trains and it is so arranged that, in an automatic shift range of a manual valve connected through first oil passage to an oil pressure source, low speed and high speed oil pressure clutches are selectively supplied with pressure oil through a shift valve in communication with the manual valve through a second oil passage. In a hold range of the manual valve, the valve is interposed between the low speed oil pressure clutch and the shift valve means for dividing the oil passage into third oil passage on its upstream side and fourth oil passage on its downstream side, having no communication between third and fourth passage and establishing a communication between fourth and first oil passage without through the shift valve means. At the same time the communication between first and second oil passage is disrupted.

Growing community of inventors

Kamifukuoka, Japan

Takeyuki Shimizu