Abstract: A vehicle operation assisting system includes an assist yaw rate calculator which calculates an assist yaw rate necessary to avoid an obstacle based on a detection result of the obstacle by a radar device, an actual vehicle moving amount calculator which calculates an actual vehicle moving amount from a yaw rate and a lateral acceleration of a vehicle. When an avoiding operation detector determines an avoiding operation of a driver, a target vehicle moving amount setting device replaces a standard moving amount based on an avoiding operation of a driver with the assist yaw rate, and a vehicle movement controller controls lateral movement of the vehicle so that the actual vehicle moving amount agrees with the assist yaw rate.

Abstract: When a collision avoidance operation determiner determines a collision avoidance operation by a driver, a target assist electrical current calculator calculates a target assist electrical current based on a deviation between a standard yaw rate corrected in accordance with avoidance momentum calculated by an avoidance momentum calculator and an actual yaw rate; and the target assist electrical current is supplied to a steering actuator to assist the collision avoidance operation by the driver. At this time, when an under-steer determiner determines an under-steer state, an assist electrical current is decreased by a reaction force electrical current calculated in a reaction force electrical current calculator. Therefore, a steering angle is prevented from becoming too large due to excessive assist, thereby facilitating a return operation after avoiding an obstacle.

Abstract: A steering apparatus for a vehicle includes a steering angle measuring unit, a vehicle speed measuring unit, a yaw rate measuring unit, a yaw rate-based reaction force control unit for controlling a steering reaction force depending on an actual yaw rate measured by the yaw rate measuring unit, and a yaw rate deviation-based reaction force control unit for determining a standard yaw rate depending on at least the steering angle and the vehicle speed, calculating a yaw rate deviation between the standard yaw rate and the actual yaw rate, and controlling the steering reaction force depending on the yaw rate deviation, and a primary control unit for executing a control operation such that a degree of contribution of the yaw rate-based reaction force control unit is decreased and a degree of contribution of the yaw rate deviation-based reaction force control unit is increased as the yaw rate deviation increases.

Abstract: A vehicle operation assisting system includes an assist yaw rate calculator which calculates an assist yaw rate necessary to avoid an obstacle based on a detection result of the obstacle by a radar device, an actual vehicle moving amount calculator which calculates an actual vehicle moving amount from a yaw rate and a lateral acceleration of a vehicle. When an avoiding operation detector determines an avoiding operation of a driver, a target vehicle moving amount setting device replaces a standard moving amount based on an avoiding operation of a driver with the assist yaw rate, and a vehicle movement controller controls lateral movement of the vehicle so that the actual vehicle moving amount agrees with the assist yaw rate.

Abstract: A vehicle operation assist system includes an assist yaw rate calculator which calculates a necessary moving amount to avoid an obstacle based on a detection result of the obstacle by a radar device, and a vehicle movement controller controls lateral movement of the vehicle based on the calculated moving amount. When an avoiding operation detector determines initiation of an obstacle avoiding operation by the driver, the vehicle movement controller operates a braking device to control the lateral movement of the vehicle, so that the obstacle can be reliably avoided. When a restoring operation detector determines initiation of a restoring operation, the vehicle movement controller operates a power steering device to control the lateral movement of the vehicle, so that delay in the steering operation by the driver, and excessive restoring operation of the steering handle to compensate for the delay are suppressed, thus stabilizing vehicle behavior.

Abstract: A lighting control circuit for head lamp has three relays with coils. When a lighting switch is turned on, high beams of right and left head lamps are lit. When the dimmer switch is turned on, low beams of right and left head lamps are lit. When the lighting switch is turned off, right and left head lamps are lit by low voltage which is equal to 50% of a rated voltage so as to improve the durability of the head lamps.