Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Aishin Aw Co., Ltd.

Shinji Kasuga

Atsushi Tabata

Yasuo Hojo

Hiroshi Morioka

Yutaka Taga

Kazumasa Tsukamoto

Masahiro Hayabuchi

Kunihiro Iwatsuki

Masashi Hattori

Takashi Ohta

Masahiko Ando

Yoshinobu Soga

Hideki Yasue

Hideo Tomomatsu

Takeshi Inuzuka

Hiroji Taniguchi

Takeo Mori

Ryoji Habuchi

Daiki Suyama

Akira Fukatsu

Masami Sugaya

Shinya Kuwabara

Masabumi Nishigaya

Shoichi Sayo

Nobuyuki Takahashi

Yoshiyuki Onozawa

When a sub transmission mechanism is switched to the LO-side gear stage, a hybrid control unit executes a control operation such that vehicle speed does not exceed limit vehicle speed determined in advance in accordance with the transmission gear ratio of LO-side gear stage. Specifically, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator, so that rotation speed of the second motor generator does not exceed tolerable rotation speed. Further, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator when any of temperatures respectively detected by temperature sensors exceed corresponding upper limit temperatures.

Hybrid driving apparatus with multistage transmission provided in power transmission path and control method thereof

The continuously variable belt transmission is provided with a fixed sheave and a movable sheave provided on a secondary shaft, a first hydraulic chamber that presses the movable sheave in an axial direction, a second hydraulic chamber that gives the movable sheave a pressing force acting in a direction opposite the pressing force given by the first hydraulic chamber, an oil passage connected to the second hydraulic chamber, and an oil receiver disposed along a path from the oil passage to the second hydraulic chamber. The oil receiver is attached to the secondary shaft, a bearing and a bulkhead are disposed on both sides of the oil receiver, an oil passage is provided in the secondary shaft, and a grooved portion provided in the oil receiver connects the second hydraulic chamber and the oil passage.

Continuously variable belt transmission

A hydraulic circuit cleaning apparatus has a hydraulic circuit that includes an oil pump, an oil passage to which the oil pressure ejected from the oil pump is supplied, and a pressure regulator device connected to the oil passage for regulating the oil pressure in the oil passage. The apparatus cleans the hydraulic circuit by using a cleaning liquid. A discharge oil passage is connected to a discharge port of the pressure regulator device, so that the cleaning liquid is discharged out of the hydraulic circuit via the discharge oil passage.

Hydraulic circuit cleaning apparatus and method

A control system for an automatic transmission including a range switching mechanism for switching a shift range by electric means. It is detected that the switching of the shift range has been instructed by the range switching mechanism. It is decided that a gear change will occur according to the instructed switching of the shift range. It is decided that the decided gear change can be executed. The range switching of the shift range is inhibited, when it is not decided that the gear change is allowed.

Gear change control system for automatic transmissions

A lower body structure for a vehicle having a pair of side sills provided respectively at vehicle transverse ends of a floor panel in such a manner as to extend in a longitudinal direction of the vehicle includes: a floor-panel reinforcing member disposed on an underside of the floor panel in such a manner as to extend in the longitudinal direction of the vehicle at a position spaced apart from each of the side sills in a transversely inward direction of the vehicle; and a side-sill reinforcing member disposed on an upper surface of the floor panel in such a manner as to extend in a transverse direction of the vehicle and connect a vehicle transverse inner side portion of each of the side sills and the floor panel, wherein the side-sill reinforcing member is provided such that a portion of the floor panel which extends from each of the side sills to a position spaced apart a predetermined distance from the floor-panel reinforcing member in a transversely outward direction of the vehicle is reinforced along the transverse direction of the vehicle, the reinforced portion of the floor panel being adapted to undergo displacement toward a side wall surface of the floor-panel reinforcing member due to an impact force occurring at a time of a side collision.

Lower body structure for vehicle

A control system for an automatic transmission including a main transmission unit for setting a reverse stage and a plurality of forward stages and an auxiliary transmission unit connected in series to the main transmission unit and capable to be changed between two higher and lower stages. The control system comprises: a solenoid valve for outputting a signal pressure when at least the reverse stage and a predetermined one of the forward stages are to be set; a change-over valve for changing the signal pressure selectively into a signal pressure for setting the auxiliary transmission unit to a high gear stage and a signal pressure for controlling an engine braking state; and an engine braking control valve for controlling an engine braking frictional element at the predetermined forward stage into a released state in response to the signal pressure coming from the change-over valve. The acting state of the solenoid valve when the reverse stage is to be set and the acting state of the solenoid valve when the predetermined forward stage for making the engine braking ineffective is to be set are identical to each other.

Control system for automatic transmission

A lockup clutch of an automatic transmission is controlled so that no shock is produced while the vehicle is running within a predetermined gear stage. The automatic transmission includes a fluid coupling; a lockup clutch provided in the fluid coupling; a shift selector for selecting a range; a vehicle speed sensor for detecting vehicle speed, and a throttle opening sensor for detecting throttle opening. A control unit determines a gear stage in accordance with the selected range, the vehicle speed and the throttle opening, decides a shift, produces a shifting output signal, decides ON or OFF for the lockup clutch in accordance with the selected range, the vehicle speed and the throttle opening, and produces a lockup ON/OFF output signal. An oil pressure circuit actuates solenoid valves in response to the shifting output signal and the lockup ON/OFF output signal of the control unit. The solenoid valves, in turn, control engagement and release of frictional engagement elements to achieve the decided gear stage and control engagement and release of the lockup clutch. The control unit includes, stored in memory, a lockup diagram set with an ON/OFF hysteresis area; a comparator for deciding whether or not the vehicle speed and the throttle opening, at the time of a shifting output signal is produced, are within the ON/OFF hysteresis area of the lockup diagram; and a lockup output signal generator for turning the lockup output ON if the vehicle speed and the throttle opening are within the ON/OFF hysteresis area when the shifting output signal is produced.

Automatic transmission

Growing community of inventors

Anjo, Japan

Shinji Kasuga