Honda Motor Co., Ltd.

Keiichi Nishiyama

Tomoaki Ishikawa

Masamichi Harada

Ukyo Ogata

Satoru Miyata

Ryo Matsui

Atsushi Okabe

Naoki Nishimura

A comparison determination unit of a hydraulic control device determines whether a characteristic abnormality occurs in at least one hydraulic sensor of an output pressure sensor and a lateral pressure sensor by comparing an output pressure detected by the output pressure sensor and a lateral pressure detected by the lateral pressure sensor. An individual determination unit determines whether the characteristic abnormality occurs in the hydraulic sensor as a determination target by individually determining whether the output pressure and the lateral pressure are out of a predetermined range. A characteristic abnormality detection unit determines the hydraulic sensor in which the characteristic abnormality occurs by using each determination result in the comparison determination unit and the individual determination unit.

Hydraulic control device including first and second hydraulic sensors

A control device for a vehicle including an engine, a transmission, a connector/disconnector, and control means, wherein the transmission is configured to change a speed of rotation by drive force of the engine and output the rotation. The connector/disconnector is configured to connect/disconnect transmission of the drive force from the engine to the transmission. The control means controls the engine, the transmission, and the connector/disconnector. In the vehicle control device, in a case where the control means performs idle neutral control by controlling the connector/disconnector to a released state after making the engine return from an idle stop state, the control means makes a determination as to performance of the idle neutral control when it is determined that a rotational speed of the engine is stabilized.

Vehicle control device

A control system for a variable displacement pump driven by a drive source for driving a vehicle is provided. The variable displacement pump pressurizes hydraulic oil, and is switchable between a full capacity operation in which a discharge flow rate is maximized and a partial capacity operation in which the discharge flow rate is lower than that in the full capacity operation. It is determined whether an operation for starting the drive source has been performed. A rotational speed of the drive source and a temperature of the hydraulic oil are detected. When the rotational speed of the drive source is equal to or higher than a predetermined rotational speed and the hydraulic oil temperature is equal to or lower than a predetermined temperature, immediately after the operation for starting the drive source is performed, the partial capacity operation of the variable displacement pump is performed. This control suppresses generation of untoward noises caused by the operation of the variable displacement pump when starting to drive the vehicle.

Control system for variable displacement pump

Growing community of inventors

Wako, Japan

Keiichi Nishiyama