Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Junya Tachikawa

Koichi Fushimi

Ryuichi Mori

Eijiro Shimabukuro

Masato Fujioka

Tatsuya Fukushima

Yuji Yasui

Soichi Sugino

Kazuo Ooyama

Takeshi Yanagisawa

Manabu Sakurada

Kazuaki Takizawa

Yoshinori Tanaka

Kazuhito Hiraga

Kenichiro Murata

Takuya Kurokawa

Toshikazu Kouno

Akifumi Sudo

Katsuya Minami

Yusuke Yoshiizumi

A method for joining segments (electrical conductors) includes first and second joining steps. The first joining step includes welding a group of the segments including ends, such that the first group is welded to pairs of electrical conductors. The second joining step includes welding a second group of the segments including ends, which are composed of the segments whose ends are arranged in a column in the radial direction, such that the second group is welded to pairs of electrical conductors. The first group includes a segment as a first electrical conductor including the end which is located at the middle portion of a group of the segments including the ends in the radial direction. The second group includes a segment as a second electrical conductor including the end which crosses the first electrical conductor on the opposite sides with respect to the middle portion in the radial direction.

Method for joining electrical conductors

An electric motor includes a housing, a rotor, a stator, a storage tank, and a communication passage. The stator has a stator core provided coaxially with the rotor to surround the rotor. The storage tank is provided at a lower portion of the housing to store lubricating oil and divided by the stator core into a first storage tank and a second storage tank. The communication passage is provided to communicate the first storage tank with the second storage tank. The communication passage, as seen in an axial direction, extends above an oil level of the lubricating oil stored in the first storage tank and the second storage tank such that an air flows between an upper portion of the first storage tank and an upper portion of the second storage tank.

Electric motor having a communication passage

In a control device of an electric vehicle, control unit switches energization such that a decrease in an output of a rotary electric machine in which a stall state is detected by stall state-detecting unit and an increase in an output of another rotary electric machine in which the stall state is not detected by the stall state-detecting unit are made to be the same.

Control device and control method of electric vehicle

A second clutch (C) which couples a carrier (Cr) of the compound planetary gear set () to a speed ring gear (Rf) of the single planetary gear set () is arranged between the single planetary gear set () and the compound planetary gear set (). Then, a first clutch (C) which couples a second sun gear (Sr) of the compound planetary gear set () to a carrier (Cf) of the single planetary gear set (), and a third clutch (C) which couples a sun gear (Sr) of the compound planetary gear set () to carrier (Cf) of the single planetary gear set () are arranged at the side of the compound planetary gear set () opposite to the single planetary gear set ().

Automatic transmission

A controller for a transmission capable of preventing an occurrence of a gear squeak caused by a malfunction of a synchronization mechanism. The voltage determination sectionperforms a shift operation of a transmission by determining a control input Vin to a shift motorso as to match an actual position Psc of a coupling sleevegrasped by an actual position grasping sectionwith a target position Psc_cmd of the coupling sleeveset by a target position setting section. After starting the shift operation of the transmission, it halts the shift operation by detecting a malfunction in the gear position where the shift operation is under execution when the actual position Psc of the coupling sleevehas reached a malfunction judgment position provided within a range from a balk point to a contact point between the coupling sleeveand an idle gearbefore a difference Esc between the actual position Psc and the target position Psc_cmd of the coupling sleeveexceeds a given contact judgment value.

Controller for transmission

A vehicle driving system includes a pulley shaft synchronously rotating with a crankshaft of an engine, an auxiliary unit drive shaft driving an auxiliary unit, a planetary gear mechanism portion having elements such as a sun gear, a pinion carrier and a ring gear. The pulley shaft and the auxiliary unit drive shaft are adapted for connection to any two of the elements, respectively. The motor connecting to the remaining element of the planetary gear mechanism portion. A lock-up clutch connecting together the two or more elements of the planetary gear mechanism portion. A one-way clutch for restricting the rotation of the auxiliary unit drive shaft in one direction, wherein the planetary gear mechanism portion, the motor, the lock-up clutch, and the auxiliary unit drive shaft are coaxially disposed in line.

Vehicle driving system

The present invention is made to operate auxiliary machine while an engine is stopped, to start an engine and to charge a battery by providing a single motor and a simple construction and by providing a simple control operation. An engine system comprises an engine, a motor, and auxiliary machine, and further comprises a planetary mechanism having three elements comprising a sun gear, a carrier and a ring gear, to which any one of an output shaft of the engine, an output shaft of the motor and a drive shaft of the auxiliary machine are respectively connected, a uniting connection device capable of uniting two or more elements of the planetary mechanism, and a rotation direction restriction device which restricts a rotation direction of the drive shaft of the auxiliary machine to one direction.

Engine system, operating method therefor, and engine starting apparatus

A hydraulic engine-starting system for cranking and starting an engine for a vehicle having automatically stopping and starting functions by a hydraulic motor. A hydraulic pressure that operates a hydraulic clutch of a transmission is raised promptly by using a hydraulic motor. The hydraulic motor is driven by a hydraulic pressure supplied thereto through a first oil passage from a hydraulic motor-driving device including an oil pump, an accumulator and a solenoid valve, thereby starting the engine. A transmission is disposed in the middle of a second oil passage for returning an oil discharged from the hydraulic motor to the hydraulic motor-driving device. Thus, the hydraulic pressure in the transmission can be raised simultaneously with the start of the engine to enable the engagement of a hydraulic clutch, thereby starting the vehicle promptly, while avoiding generating a shock from the engagement of the hydraulic clutch.

Hydraulic engine-starting system in vehicle

A starter for an internal combustion engine is provided for improving the startability and reducing noise associated with starting. The starter for an internal combustion engine comprises an electric motor, an oil pump driven by the electric motor, an accumulator for accumulating an oil pressure pumped by the oil pump, a hydraulic actuator driven by the oil pressure accumulated in the accumulator, an oil pressure supply control valve for controlling the oil pressure supplied from the accumulator to the hydraulic actuator, a driven gear for rotation integral with a crank shaft of the internal combustion engine, a driving gear connected to the hydraulic actuator, and brought into mesh with the driven gear and driven by the hydraulic actuator when the internal combustion engine is started, an oil pressure sensor for detecting the oil pressure in the accumulator, and an ECU for controlling the electric motor based on the value of the oil pressure in the accumulator detected by the oil pressure sensor. The starter maintains the hydraulic actuator in a usable state irrespective of an operating condition of the engine to reduce a starting time, thereby making it possible to improve the startability and reduce the noise.

Starter for internal combustion engine

There is provided a starter system for an internal combustion engine, which is capable of preventing wear of a brush of an electric motor ascribable to the combined use of the electric motor with a hydraulic actuator and the resulting increase in the rotational resistance due to friction of the brush, as well as capable of using one of the hydraulic actuator and the electric motor without difficulty even when the other is disabled. The hydraulic motor is driven by hydraulic pressure. A rotational shaft of the hydraulic motor is driven for rotation by the hydraulic motor. A rotational shaft of an electric motor extends in parallel with the rotational shaft of the hydraulic motor, and is driven for rotation by the electric motor. A ring gear rotates in unison with the crankshaft. A pinion gear is brought into meshing engagement with the ring gear, for starting the engine. An output shaft is connected to the pinion gear. A first one-way clutch connects the rotational shaft of the hydraulic motor and the output shaft to each other in a disconnectable manner, for transmitting rotation of the hydraulic motor to the output shaft. A second one-way clutch connects the rotational shaft of the electric motor and the output shaft to each other in a disconnectable manner, for transmitting rotation of the rotational shaft of the electric motor to the output shaft.

Growing community of inventors

Wako, Japan

Junya Tachikawa