Nissan Motor Company Limited

Jatco Corporation

Hitachi Automotive Systems, Ltd.

Atsugi Unisai Corporation

Yuji Oishi

Keisuke Iwado

Hiroyuki Tokoi

Hideaki Takahashi

Yoshihisa Kodama

Hironori Miyaishi

Masahiko Hara

Hajime Tasaka

Koji Morita

Masanori Satou

Seiichirou Takahashi

Takurou Kawasumi

Tarou Murazumi

Ryuya Ezaki

Ishiro Kaneda

Hiroyuki Watanabe

Katsunori Shirai

A transmission comprising: a primary pulley; a secondary pulley; a transmission member wound around the primary pulley and the secondary pulley; an oil pump configured to supply oil; a hydraulic control circuit configured to adjust a pressure of the oil supplied from the oil pump to a line pressure which is a source pressure of a primary pulley pressure supplied to the primary pulley and a secondary pulley pressure supplied to the secondary pulley; a line pressure detection unit configured to detect the line pressure; and a controller configured to control the hydraulic control circuit, wherein the controller is configured to select, as a target pulley pressure, a higher one of a target value of the primary pulley pressure and a target value of the secondary pulley pressure, variably set, according to an oil temperature, a target differential pressure including a detection variation of the line pressure detection unit that varies according to the oil temperature, set a target line pressure which is a target value of the line pressure to a total pressure of the target pulley pressure and the target differential pressure, and control the hydraulic control circuit such that the detected line pressure is adjusted to the target line pressure.

Transmission, method for controlling transmission, and non-transitory computer- readable medium

A hydraulic control device for a hydraulic actuation machine including a main oil pump configured to supply oil to the hydraulic actuation machine, a sub oil pump configured to temporarily supply oil to the hydraulic actuation machine based on a drive request so as to compensate for an oil shortfall when supply of oil from the main oil pump to the hydraulic actuation machine is stopped or insufficient, and a drive unit configured to drive the sub oil pump, wherein when an elapsed time elapsed from a time point when the sub oil pump is driven reaches a predetermined time, the hydraulic control device generates an air discharge command for discharging air accumulated in the sub oil pump and outputs the air discharge command to the drive unit, and the drive unit drives the sub oil pump to discharge the air accumulated in the sub oil pump based on the output air discharge command.

Hydraulic control device for hydraulic actuation machine, hydraulic control method for hydraulic actuation machine, and non-transitory computer-readable medium

In a vehicle control device for controlling the vehicle, when automatic downshift control for automatically downshifting a speed ratio of the transmission is executed in the case where a drive current value of the motor obtained when the second oil pump is driven is larger than a maximum value of the drive current value of the motor obtained when the second oil pump is driven in a normal drive state, the vehicle control device increases a minimum rotation speed of the drive source compared to a case where the drive current value of the motor is equal to or less than the maximum value, and when the automatic downshift control is executed in the case where a line pressure generated by a hydraulic pressure supplied from the first oil pump and the second oil pump is larger than a predetermined value, the vehicle control device does not increase the minimum rotation speed of the drive source even in the case where the drive current value of the motor obtained when the second oil pump is driven is larger than the maximum value.

Vehicle control device

In a hydraulic pressure unit, a housing is equipped with a plurality of piping connections having respectively corresponding openings exposed to an external or plurally grouped piping connections; and a protective tape includes one surface onto which a pressure-sensitive adhesive is disposed by means of which the tape is adhered onto an outer surface of the housing, one sheet of the tape covering simultaneously at least two of the openings or plurally grouped piping connections, the protective tape including: a division section dividing and peeling off the protective tape for each of the openings of the piping connections or for each of the groups of the piping connections; and a grip section disposed to be enabled to be gripped by an operator, an adhesion region of the protective tape to the outer surface of the housing by means of the adhesive being disposed on a region excluding the division section.

Hydraulic pressure unit

A pressure control device for a hydraulic braking system of an automotive vehicle is provided with a master cylinder for pressurizing hydraulic fluid according to a braking action of a driver. A wheel cylinder for applying braking force to a wheel is communicated with the master cylinder through a main passage. An accumulator is connected to the main passage. A rotating condition of the wheel is detected by a detector and is outputted as a signal indicative of the rotating condition of the wheel. A hydraulic pressure controller is arranged to control the wheel cylinder hydraulic pressure when the detector detects one of a lock condition and a slippage condition. The hydraulic pressure controller is communicated with the main passage. A switching device is arranged to stop the communication between the master cylinder and the hydraulic pressure controller, and open the communication between the accumulator and the hydraulic pressure controller when the detector detects the slippage condition in acceleration. Therefore, during the slippage control in acceleration, the hydraulic fluid stored in the hydraulic pressure controller is returned to the main passage owing to the pressure difference therebetween.

Pressure control device for hydraulic braking system

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Atsugi, Japan

Yuji Oishi