Honda Motor Co., Ltd.

Kotaro Hiramine

Yoshiharu Saito

Atsushi Komatsu

Yuki Ono

Shunsuke Yoshida

Tomoyuki Noguchi

Nobuyuki Watanabe

Yoshinori Furusawa

Tomohiro Sakuraba

Yasushi Ohkawa

Shusaku Noguchi

Makirou Ishimoto

Yasunobu Tandai

Akio Morita

A hydraulic control apparatus including a first and second control valves switched to exert hydraulic pressure on a piston to press toward first position, a third and fourth control valves switched to exert hydraulic pressure on the piston to press toward second position and, a CPU. The CPU performs executing a first process controlling the control valves so that hydraulic pressure is exerted by switching of the first, second and third control valves or a second process controlling the control valves so that hydraulic pressure is exerted by switching of the second control valve and determining that the first control valve is failed when movement of the piston to the first position is not detected through the first process and determining that the third control valve is failed when movement of the piston to the first position is not detected through the second process.

Hydraulic control apparatus

In an automatic transmission, a shift lever is operable to move to one of a plurality of shift positions corresponding to ranges established as selectable options. The plurality of shift positions are each configured as one of a momentary position allowing the shift lever to automatically return to a home position and a retention position allowing the shift lever to be held therein. A return mechanism for causing the shift lever held in the retention position to return to the home position is provided. The return mechanism is enabled on one of conditions that the parking switch be turned on and that an ignition switch be turned off. In a manual transmission, a return mechanism for causing the shift lever held in a gear stage to return to a home position is provided, and the return mechanism is enabled on condition that an ignition switch be turned off.

Gearshift device and method of controlling same

A gearshift device includes a gearshift lever adapted to move a plurality of gear selection positions, and a gear selection position detecting unit which detects a gear selection position. The gear selection position detecting unit has a magnet plate disposed at a lower end portion of the gearshift lever and movable in accordance with a movement of the gearshift lever and primary magnetic sensors and at least one secondary magnetic sensor, which are disposed so as to oppose to the magnet plate in a non-contact fashion at predetermined positions based on the individual gear selection positions. The primary magnetic sensor detects magnetic flux density and outputs ON/OFF signals in accordance with intensity of the detected magnetic flux density The secondary magnetic sensor detects magnetic flux density and outputs an output value according to the detected magnitude of the magnetic flux density.

Gearshift device for automatic transmission

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Wako, Japan

Kotaro Hiramine