Honda Motor Co., Ltd.

Hideaki Iwashita

Kazuhiko Kitano

Naoyuki Mimatsu

Kanta Tsuji

Yoshihiro Sato

Eisuke Komazawa

Hisashi Ishikawa

Masatoshi Nakajima

Noriyuki Yagi

Kosuke Tachikawa

Shigeji Nakano

Daisuke Tsutsumi

Hidekazu Saito

Hiromichi Konishi

Kenji Oogushi

Yuya Shimota

Naoto Doi

Yuji Okazaki

Masaya Deguchi

Toru Ozawa

A hydraulic circuit includes a first shift valve and a second shift valve that are provided in series between a source oil path through which oil whose pressure has been regulated flows and a first clutch oil path and a second clutch oil path. The first shift valve is selectively switchable between a first switching state where a first communicating oil path and the first clutch oil path are communicated and a second switching state where a second communicating oil path and the second clutch oil path are communicated, and the second shift valve is selectively switchable between a third switching state where the source oil path and the first communicating oil path are communicated and a fourth switching state where the source oil path and the second communicating oil path are communicated.

Hydraulic circuit of driving device for vehicle

Provided is a control device for a vehicle. A control device for a vehicle includes a vehicle that includes an engine and a main motor, and a transmission equipped with first and second input shafts which are respectively connected to the engine via first and second clutches, an output shaft through which power is output to drive wheels, first and second transmission mechanisms which respectively includes a plurality of transmission gears selectively joined to the first and second input shaft respectively, and an ECU. When the main motor is driven and when the engine is stopped, the ECU determines that the vehicle travels using power of the engine using the transmission gears of one of transmission mechanisms in a case where defective engagement release occurs such that a transmission gear of the other transmission mechanism is not disengaged.

Control device for vehicle

A revolution rate sensor configured to detect a revolution rate of a first input shaft and an ECU configured to estimate the revolution rate of the first input shaft using another method which is not based on detection of the revolution rate sensor are provided, and the ECU performs engagement permission determination of a switching mechanism associated with the lowest shift stage in first engagement switching mechanisms using an estimated value of the revolution rate of the first input shaft estimated by the ECU when it is determined that a revolution rate of the first input shaft cannot be detected normally by the revolution rate sensor.

Control device in hybrid vehicle

A control device in a hybrid vehicle in which control is performed so that the hybrid vehicle can travel using only one shift mechanism from two shift mechanisms is provided. The control device in the hybrid vehicle includes: a transmission including: a first input shaft connected to a motor and optionally connected to an engine; a second input shaft optionally connected to the engine; an output shaft configured to output to power to drive wheels; a first shift mechanism including a plurality of shift gears optionally coupled to the first input shaft; and a second shift mechanism including a plurality of other shift gears optionally coupled to the second input shaft; and an electronic control unit (ECU), wherein the ECU starts the engine with the first input shaft using the motor if none of the shift gears in the first shift mechanism is engaged when the engine is not operating.

A gear operating mechanism comprises: a power source; an operation shaft driven using the power source and rotatably supported in a rotational direction and an axial direction; members to be operated corresponding to fork parts; an operation engagement piece attached to the operation shaft and configured to move each member to be operated between a reference position and an engagement position; a release engagement pieces attached to the operation shaft and configured to return the members to be operated from the engagement position to the reference position; and a control unit configured to control an operation of the operation shaft is provided, wherein the control unit has a first release mode using the release engagement pieces and a second release mode using the operation engagement piece when the member to be operated is returned from the engagement position to the reference position.

Gear operating mechanism in transmission

Noise and vibration occurring when a parking lock is released can be efficiently reduced in the hybrid vehicle which includes an internal combustion engine and an electric motor serving as the driving sources and a stepped type transmission divided into two systems of a shift shaft at an odd shift stage side and a shift shaft at an even shift stage side. A 2-speed stage is selected as a pre-shift stage set when a meshing member is meshed with a parking lock gear and a parking lock mechanism has a parking lock state. The 2-speed driving gear is joined to an output shaft using a second engagement switching mechanism in a state in which the 2-speed stage is set as the pre-shift stage so that a larger inertial mass can be secured as an inertial mass of a parking lock gear and members joined to an output shaft.

A relay control system for an electric vehicle includes an electric power line, a relay, an operation member, a state sensor, a rotational speed detector, a shift position detector, and a relay disconnection permitting device. The state sensor is configured to sense that a signal circuit through which a signal related to a state of the operation member flows is changed into a disconnecting operation state. The rotational speed detector is configured to detect a rotational speed of the electric motor. The shift position detector is configured to detect a shift position of the electric vehicle. The relay disconnection permitting device permits disconnection of the relay based on the rotational speed detected by the rotational speed detector and the shift position detected by the shift position detector if the state sensor senses that the signal circuit is changed into the disconnecting operation state.

Relay control system for electric vehicle and method for controlling relay of electric vehicle

A power control apparatus is mounted on an electrically driven vehicle which includes an electrical storage device configured by connecting a plurality of batteries in parallel, a voltage detection unit which detects a voltage of each battery, and a load, and the power control apparatus includes, a voltage deviation calculation unit which is connected to the electrical storage device, and calculates voltage deviation between the plurality of batteries based on the voltage detected by each voltage detection unit at the time of driving the load which is driven by power supply from the electrical storage device, a comparator which compares the voltage deviation calculated by the voltage deviation calculation unit and a first predetermined threshold, and a cutoff detection unit which detects a presence or absence of the battery, which comes into a cutoff state in the electrical storage device, when the voltage deviation is equal to or more than the first threshold in a comparison result by the comparator.

Growing community of inventors

Saitama, Japan

Hideaki Iwashita