Toyota Jidosha Kabushiki Kaisha

Nippondenso Co., Ltd.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Yutaka Obuchi

Kazuhiro Sakurai

Yutaka Nonomura

Kouji Tsukada

Masaharu Takeuchi

Yuji Nishibe

Masanori Miyashita

Shigetaka Tanaka

Yukio Ohtaka

Takashi Mori

A vehicle control device capable of obtaining the sufficient effect of vehicle control is provided. A vehicle control deviceoutputs a control signal to a vehicle on the basis of the height of the center of gravity based on the behavior of the vehicle at the time of rolling or pitching or the correlation value correlated with the height of the center of gravity, and the control signal is calculated on the basis of acceleration of the vehicle in which a rolling angle or a pitch angle is reflected. The operation device calculates the height of the center of gravity or the vehicle weight on the basis of acceleration of the vehicle in which the rolling angle or the pitch angle is reflected and calculates a control signal on the basis of the height of the center of gravity or the vehicle weight. Thus, since the vehicle control devicecan calculate the control signal on the basis of the acceleration of the vehicle in which the rolling angle or the pitch angle is reflected, it is possible to perform accurate vehicle control according to the rolling angle or the pitch angle at the time of rolling or pitching of the vehicle.

Vehicle control system, and operation device

In a vehicle control device capable of sufficiently exhibiting the effect of vehicle control, a selection section selects a value greater than an intermediate value of a vehicle weight in a range restricted by a range restriction unit as the value of the vehicle weight and selects a value greater than an intermediate value of the height of the center of gravity in the range as the value of the height of the center of gravity. For stability, the greater the height of the center of gravity of the vehicle is, the stricter the conditions that are imposed. For fuel consumption, the greater the vehicle weight is, the stricter the conditions that are imposed. The selection section selects the values which become conditions stricter than at least an intermediate value in the range restricted by the range restriction section, and the range restriction section restricts the range.

Vehicle control device

A brake control system and method controls a braking operation in a vehicle. When a pressure sensor and a stroke sensor are functioning normally, a brake control system calculates a final target deceleration Gt as a weighted sum of a target deceleration Gpt that is based on a master cylinder pressure Pm and a target deceleration Gst that is based on a depression stroke St, and a braking force is controlled based on the final target deceleration Gt. On the other hand, when there is an abnormality in the stroke sensor, the brake control system calculates a target deceleration Gpt that is greater than when the stroke sensor is functioning normally in a region where the braking amount is small, and the target deceleration Gpt is set to the final target deceleration Gt. When there is an abnormality in the pressure sensor, the brake control system calculates a target deceleration Gst that is larger than when the pressure sensor is functioning normally in a range where the braking amount is large, and the target deceleration Gst is set to the final target deceleration Gt.

Vehicle brake control system and method therefor

An engine including at least two digital computers wherein controlled systems each including a switching unit, an ignitor, and a spark plug are independently provided for each cylinder, and controlled systems each including a switching unit, a drive circuit, and a fuel injector are independently provided for each cylinder. The controlled systems are normally controlled by one of the digital computers, but when one of the digital computers malfunctions, the controlled systems are controlled by the other digital computer.

Device for controlling a multi-cylinder engine

A torque sensor which can detect instantaneous output torque of the engine is disposed on the output shaft of the engine, and the output signal thereof is frequency-analyzed to extract a half synchronous frequency component having a frequency equals to a half of the number of the revolutions of the engine per second and a synchronous frequency component having a frequency equals to the number of the revolutions of the engine per second, the electronic control unit (ECU) of the engine determines the misfiring mode of the engine including the number of the misfiring cylinders and the interval thereof in the firing order of the engine based on the amplitude of the frequency components and the waveform thereof, then the ECU determines the misfiring cylinders based on the determined misfiring mode and the phase angle of the frequency components of the torque sensor relative to a reference crank angle signal.

Growing community of inventors

Susono, Japan

Yutaka Obuchi