Ntn Corporation

Akiyoshi Nishikawa

Yui Masuda

Tatsuya Yamasaki

Koichi Okada

Akio Nakajima

Yingjie Zhang

Provided is an electric brake device capable of adjusting a clearance without making a driver feel discomfort, in a vehicle equipped with the electric brake device. A control device () of this electric brake device (DB) includes: a brake operation amount detector () to detect an operation amount to a brake operation member () of the vehicle; and an operation record flag storage unit () to store an operation record flag indicating a record of a latest operation performed by the driver to the brake operation member (), on the basis of the operation amount detected by the brake operation amount detector (). The control device () further includes a target clearance determination unit () to determine a target clearance with reference to the operation record flag stored in the operation record flag storage unit ().

Electric brake device

Provided is a brake device that is able to achieve an improvement in versatility of the device, and which is able to reduce an uncomfortable feeling and annoyance caused by an operating noise of a parking brake. This brake device includes: left and right parking brake mechanisms configured to independently apply braking forces to left and right wheels of a vehicle, respectively, and hold the vehicle stationary; and a control device configured to control these parking brake mechanisms. The control device includes a parking brake actuation determiner configured to adjust respective timings at which the left and right parking brake mechanisms are actuated so as to reduce an uncomfortable feeling caused to an occupant of the vehicle.

Brake device

An electric brake device is provided which is capable of early detecting presence/absence of abnormality in the brake device during the traveling of a vehicle in the absence of the operation of a brake application device. A controller includes an abnormality detecting operation controller which operates the electric motor according to a predetermined condition during the traveling of the vehicle in the absence of the operation of the brake application device. The device further includes an abnormality detector which obtains a measured value of a predetermined item related to the vehicle when the electric motor is operated by the abnormality detecting operation controller, and compares the measured value with an estimated value or a set value to detect presence/absence of abnormality in the brake device.

Provided is a vehicle braking force controller that can realize both improvement of passengers' riding comfort and feeling, and quick responsiveness, and that is excellent in stability against noise. The vehicle braking force controller provides a braking force command value in response to a stroke amount of a brake pedal operated by a driver, to a braking device which provides braking force to wheels. A stroke amount detection unit which detects a stroke amount inputted to the brake pedal is provided. A path-corresponding braking force command value changing unit is provided which changes the relationship between the stroke amount and the braking force command value determined based on the stroke amount, in response to an increase-decrease path that the stroke amount inputted from the brake pedal is following.

Vehicle braking force controller

A vehicle turning efficiency improving apparatus is applicable to an automotive vehicle of a type equipped with either a braking system or a driving train, which is capable of performing a braking force control or a driving force control separately on vehicle wheels and a steering mechanism configured to steer the left and right vehicle wheels separately. A control unit is provided for performing a turn assist control, in which a time difference is generated in steering operation of the left and right vehicle wheels and at least one of a braking and a driving force difference is generated in the left and right vehicle wheels to thereby generate a yaw moment.

Growing community of inventors

Iwata, Japan

Akiyoshi Nishikawa