Honda Motor Co., Ltd.

Yuya Goto

Ryoma Kanda

Yoshiaki Kobayashi

Toshiaki Matsuzawa

Naoto Okubo

Takeshi Kojima

Shigeru Doi

Masahiro Hirota

Hitoshi Sasaki

Kimiyoshi Kusaka

Kenta Kakutani

Hideki Kakinuma

Ittoku Hirashima

A driving assistance apparatus according to the present disclosure includes: a vehicle acceleration detection unit configured to detect vehicle acceleration including lateral acceleration and longitudinal acceleration of a vehicle; a calculation unit configured to calculate for each wheel a friction circle, and a lateral force generated at each wheel and a longitudinal force generated at each wheel on the basis of a result of detection by the vehicle acceleration detection unit; and a display unit configured to display an image based on the friction circle, and a magnitude and/or a direction of a resultant force of the lateral force and the longitudinal force generated at each wheel based on a result of calculation by the calculation unit.

Driving assistance apparatus, recording medium having driving assistance program recorded thereon, and driving assistance method

Provided is a driving evaluation device that enables evaluation of driving for the purpose of improving a driving time in a circuit racecourse, for example. The driving evaluation device includes an evaluation section extractorthat detects a deceleration section and an acceleration section in cornering, a section average classifierthat calculates, based on a front-rear acceleration and a lateral acceleration, an acceleration norm average value in the deceleration section and that in the acceleration section, and a skill deficiency evaluatorthat evaluates driving skill based on the acceleration norm average value in the deceleration section and that in the acceleration section.

Driving evaluation device and driving evaluation method

Provided is a driving evaluation device that enables evaluation of driving for the purpose of improving a driving time in a circuit racecourse. The driving evaluation device includes an evaluation section extractorthat detects a deceleration section and an acceleration section in cornering, a tire friction circle-load factor calculatorthat calculates, based on a front-rear acceleration and a lateral acceleration, a tire friction circle and a tire load factor in the deceleration section and those in the acceleration section, and a skill deficiency evaluatorthat evaluates driving based on the tire friction circle and the tire load factor in the deceleration section and those in the acceleration section.

Provided is an electric suspension device including an electromagnetic actuator that is provided between a body and wheel of a vehicle and generates a load for damping vibration of the body. It includes: a camera that detects preview image information of a road surface in front of the vehicle; a 3D gyro sensor that detects a sprung speed of the vehicle; a target load computation unit that computes a target load based on the preview image information and the sprung speed; and a load control unit that controls the load of the actuator by using the computed target load. When a detection result based on the preview image information indicates that the front road surface is even but a detection result based on the sprung speed indicates that the front road surface is uneven, the target load computation unit computes the target load based on the sprung speed.

Electric suspension device

Provided is an electric suspension device including an electromagnetic actuator that is provided between a body and wheel of a vehicle and generates damping force for damping vibration of the body. It includes: an information acquisition unit that acquires information on a wheel speed and a sprung speed of the vehicle; an estimation unit that estimates a stroke speed of the actuator based on the wheel speed; a determination unit that determines whether a wheel slip has occurred; and an orientation control unit that performs orientation control of the vehicle based on the sprung speed and the estimated stroke speed. When a wheel slip occurs, the orientation control unit performs orientation control of the vehicle based on a fixed stroke speed whose direction is the same as a direction of the sprung speed and whose magnitude is set at a predetermined fixed value, instead of the estimated stroke speed.

Provided is an electric suspension device including an electromagnetic actuator that is provided between a body and wheel of a vehicle and generates damping force for damping vibration of the body. It includes: an information acquisition unit that acquires information on a sprung speed and sprung acceleration of the vehicle; a bounce target value computation unit that computes a bounce target value for controlling the vehicle's bounce orientation based on the sprung speed; and a driving control unit that controls driving of the actuator with a control target load which is based on the bounce target value. The bounce target value computation unit has a bounce target load map in which the bounce target value is associated with the sprung speed. The bounce target value computation unit adjusts a width of a dead zone set in the map based on the information on the sprung speed and sprung acceleration.

Provided is an electric suspension device including an electromagnetic actuator that is provided between a body and wheel of a vehicle and generates damping force for damping vibration of the body. It includes: an information acquisition unit that acquires information on the vehicle's sprung speed, pitch rate, and roll rate; a bounce target value computation unit that computes a bounce target value for controlling the vehicle's bounce orientation based on the sprung speed; a pitch target value computation unit that computes a pitch target value for controlling the vehicle's pitch orientation based on the pitch rate; a roll target value computation unit that computes a roll target value for controlling the vehicle's roll orientation based on the roll rate; and a driving control unit that controls driving of the actuator with a control target load which is based on a sum of the bounce, pitch, and roll target values.

A vehicle control system () for controlling a behavior control device () that controls a behavior of a vehicle (), comprising: a feed-forward computing unit () that computes a feed forward control amount of the behavior control device according to a steering angle of the vehicle; a feedback computing unit () that computes a feedback control amount of the behavior control device according to a difference between a target vehicle state amount computed from the steering angle and an actual vehicle state amount; a correcting unit () that computes a corrected feed-forward control amount by correcting the feed forward control amount according to the feedback control amount; and a target control amount computing unit () that computes a target control amount of the behavior control device according to the feedback control amount and the corrected feed forward control amount.

Vehicle control system

A vehicle motion control system includes: a steering angle sensor for detecting a steering angle; a vehicle speed sensor for detecting a vehicle speed; a lateral acceleration sensor for detecting an actual lateral acceleration of a vehicle body; a reference lateral acceleration calculation unit configured to calculate a reference lateral acceleration from the steering angle and the vehicle speed; a required longitudinal force calculation unit configured to calculate a required longitudinal force for reducing a deviation of the actual lateral acceleration relative to the reference lateral acceleration; and a longitudinal force control unit configured to control an output of at least one of a brake and a power plant such that the required longitudinal force is generated.

Vehicle control system for adjusting longtitudinal motion to reduce deviation of lateral motion

A control system for a variable damping force damper, includes: motion state quantity sensors configured to detect motion state quantities of a vehicle; a roll damping force base value setting unit configured to set a roll damping force base value based on the motion state quantities, the roll damping force base value being used to compute a target damping force of the variable damping force damper; a roll rate computation unit configured to compute a sprung mass roll rate and an unsprung mass roll rate of the vehicle based on the motion state quantities; and a roll damping force correction unit configured to correct the roll damping force base value based on a roll rate difference that is a difference between the sprung mass roll rate and the unsprung mass roll rate and to output the corrected roll damping force base value as the target damping force.

Control system for variable damping force damper

A suspension control system includes: a pitch moment computation unit configured to compute a target pitch moment; a distribution ratio computation unit configured to compute a front and rear distribution ratio based on a roll rate and a vehicle speed, to compute a front distribution ratio based on the roll rate and the vehicle speed, and to compute a rear distribution ratio based on the roll rate and the vehicle speed; and a damping force computation unit configured to compute target damping forces of the dampers corresponding to respective front wheels based on the target pitch moment, the front and rear distribution ratio, and the front distribution ratio, and to compute target damping forces of the dampers corresponding to respective rear wheels based on the target pitch moment, the front and rear distribution ratio, and the rear distribution ratio.

Suspension control system for vehicle

A suspension control system includes: variable damping force dampers provided between a vehicle body and each wheel; a roll rate output unit configured to determine if a steering angle speed based on a steering angle is equal to or greater than a prescribed determination value, to output a roll rate detected by a roll rate sensor if the steering angle speed is equal to or greater than the determination value, and to output zero if the steering angle speed is less than the determination value; a pitch moment computation unit configured to compute a target pitch moment of the vehicle body based on an output of the roll rate output unit; and a damping force computation unit configured to compute a target damping force of each damper based on the target pitch moment.

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Wako, Japan

Yuya Goto