Honda Giken Kogyo Kabushiki Kaisha

Hideo Udou

Kyoji Kitajima

Tadashi Kamiya

Toshiharu Kumagai

Kiyokazu Ohkubo

Shinji Fujimoto

Masakazu Mitani

A flow limiting device provided between a clutch master cylinder and a clutch operating cylinder has a first fluid chamber on one axial side in communication with the clutch master cylinder, a second fluid chamber on the axially opposite side in communication with the clutch operating cylinder, and a piston for partitioning the first and second fluid chambers. The piston has on a circumference thereof an annular groove in communication with the second fluid chamber through an inner passage, and a land on the axially opposite side of the annular groove. As passages to communicate the second fluid chamber and the clutch operating cylinder, there are provided a first passage opening into the cylinder portion in a position away in the axially opposite side relative to the land when the piston is in one stroke position at which the clutch is disengaged, and a second passage opening into the cylinder portion at a position coinciding with a position of the annular groove when the piston is in said one stroke position. When the piston is in an axially intermediate stroke position in which the clutch is in the clutch-slipping state, an opening of the second passage is closed by the land. In the first passage, there is interposed a one-way valve having an orifice which has an easy flow direction in a direction toward the clutch operating cylinder.

Apparatus for hydraulically operating clutch

In a transmission, an oil chamber is formed between one end of an input shaft and one end of an output shaft which ends are facing each other. A first oil guide is provided at the end of the input shaft such that the cylindrical portion of the first oil guide is positioned in a lubrication passage which is provided in the input shaft. In the same way, a second oil guide is provided a: the end of the output shaft such that the cylindrical portion is provided at the end of the output shaft such that the cylindrical portion of the second oil guide is positioned in a lubrication passage which is provided in the output shaft. In addition, the input shaft is provided with a release passage which opens to the outside of the input shaft while the output shaft is provided with a release passage which opens to the outside of the output shaft. With this arrangement, lubrication oil is supplied sufficiently to members such as bearings and gears which are disposed on these rotating shafts.

Transmission lubrication arrangement

A transmission case comprises first, second and third casings,and,, which are connected side by side in this order from an engine. An input shaft,and a countershaft,with speed change gear trains and clutches are disposed in a first room,which is defined by the first and second casings, and the both ends of these shafts,and,are supported rotatably in partition walls,and,which are provided with the first and second casings, respectively. In this condition, the side of the countershaft,which is located away from the engine extends into a second room,defined by the second and third casings, in which room, an output shaft,is disposed. In addition, a constant mesh type gear train is disposed in the second room,for power transmission between the countershaft,and the output shaft,. Furthermore, the end of the output shaft,which is located toward the engine is supported rotatably by the second casing while the end of the countershaft,and the side of the output shaft,which are located away from the engine are supported rotatably by the third casing.

Growing community of inventors

Wako, Japan

Hideo Udou