Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Koichiro Inukai

Jun Takahashi

Takahiro Hatano

Masao Takiguchi

Shuhei Kobayashi

Junpei Kaneta

Yukihiro Hayakawa

Tokuma Kaiho

Takamichi Shimada

Tatsuyuki Ohashi

Tomoaki Ishikawa

Satoru Sunada

Atsushi Abe

Yasushi Okawa

Akira Yoshida

Tamaki Sakurai

A continuously variable transmission includes, in a case: a drive pulley and a driven pulley each including a fixed-side pulley half and a movable-side pulley half configured to move axially relative to the fixed-side pulley half; a belt including a plurality of elements and a plurality of rings wound around the drive pulley and the driven pulley; a parking gear provided to the fixed-side pulley half of the driven pulley; a parking pawl configured to be fitted to the parking gear; a parking rod configured to swing the parking pawl; and a guide member configured to guide the parking rod, the continuously variable transmission transmitting a driving force a wheel while changing a transmission ratio by changing groove widths of the drive pulley and the driven pulley, wherein the case includes an auxiliary rib having a gap from the drive pulley equal to or smaller than a predetermined width.

Continuously variable transmission

A continuously variable transmission includes, in a case: a drive pulley and a driven pulley each including a fixed-side pulley half and a movable-side pulley half configured to move to the fixed-side pulley half; a belt including a plurality of elements and a plurality of rings wound around the drive pulley and the driven pulley; a parking gear provided to the fixed-side pulley half of the driven pulley; and a parking pawl configured to be fitted to the parking gear, the continuously variable transmission transmitting a driving force to a wheel while changing a transmission ratio by changing groove widths of the drive pulley and the driven pulley, wherein the case includes an annular rib integrally molded with the case in a manner surrounding an outer periphery of the parking gear except for a position intersecting a swing trajectory of the parking pawl and a predetermined position.

A failure detecting apparatus for a hydraulic circuit of a gearbox includes an operating-state detector. The operating-state detector is configured to detect an operating state of a subject to be controlled with a control-signal pressure output from a solenoid valve. A current setting device is configured to set an electrical current supplied to a solenoid so as to close an output oil passage when a modulator valve is normal and to open the output oil passage when an open failure occurs in the modulator valve, while the solenoid valve is conductive. A failure determining device is configured to detect a failure of the modulator valve when the operating state of the subject to be detected by the operating-state detector is abnormal after a value of the electrical current to be supplied to the solenoid is set at the current setting device.

Failure detecting apparatus for hydraulic circuit of gearbox

A shift control system is arranged such that a shift lever is movable to a &ldquo;P&rdquo; position, an &ldquo;R&rdquo; position, an &ldquo;N&rdquo; position, a &ldquo;D5&rdquo; position and a &ldquo;D4&rdquo; position along a first shift guide path , it is movable also from the &ldquo;D4&rdquo; position to a &ldquo;3/M&rdquo; position along a connection shift guide path , and it is movable also along a second shift guide path , from the &ldquo;3/M&rdquo; position into a direction different from that of the connection shift guide path . When the shift lever is shifted to the &ldquo;D5&rdquo; position, the transmission is set into an automatic shift control with forward drive speed ratios up to the FIFTH speed ratio. When the shift lever is shifted to the &ldquo;D4&rdquo; position, the transmission is set into an automatic shift control with forward drive speed ratios up to the FOURTH speed ratio. When the shift lever is shifted from the &ldquo;D4&rdquo; position to the &ldquo;3/M&rdquo; position along the connection shift guide path , the transmission is set into a &ldquo;3&rdquo; range, where an automatic shift control is executed with forward drive speed ratios up to the THIRD speed ratio. Then, the shift lever at the &ldquo;3/M&rdquo; position is swiveled along the second shift guide path to shift the speed ratio of the transmission manually in steps.

Shift control system for vehicular automatic transmission

Growing community of inventors

Wako, Japan

Koichiro Inukai