A method, arrangement and system are described for estimating one or more vehicle cornering stiffness parameters (c.sub.f, c.sub.r) in a linear vehicle operating region. The method includes reading sensor data representative of at least vehicle (1) longitudinal velocity (v.sub.x), vehicle lateral acceleration (a.sub.y), vehicle yaw rate (.sub.z) and vehicle steering angle (), determining from the read sensor data if the cornering stiffness parameters (c.sub.f, c.sub.r) are observable, and if so providing an estimate of the cornering stiffness parameters (c.sub.f, c.sub.r) using a bicycle model that includes a model of tire relaxation dynamics.

The present disclosure discloses an electric vehicle and an active safety control system and method thereof. The system includes: a wheel speed detection module configured to detect a wheel speed to generate a wheel speed signal; a steering wheel rotation angle sensor and a yaw rate sensor module, configured to detect state information of the electric vehicle; a motor controller; and an active safety controller configured to receive the wheel speed signal and state information, obtain state information of a battery pack and state information of four motors, obtain a first side slip signal or a second side slip signal according to the wheel speed signal, the state information, the battery pack and the four motors, and according to the first side slip signal or the second side slip signal, control four hydraulic brakes of the electric vehicle and control the four motors by using the motor controller.

A method of adaptively changing brake force distribution in a vehicle may include detecting vehicle parameters during operation of the vehicle, based on the detected vehicle parameters, determining downhill travel of the vehicle while braking and steering inputs are applied to the vehicle as an enabling condition, and responsive to detection of a trigger comprising detection of an understeer condition while the enabling condition is satisfied, executing a brake force distribution modification defining a change in distribution of brake forces between a front axle and a rear axle of the vehicle.

The embodiments of the present application disclose a stability control system and a stability control method for a four-wheel drive electric vehicle and the four-wheel drive electric vehicle. In the stability control system, when the lateral acceleration is equal to or greater than an acceleration threshold, at least one of a first braking force signal, a second braking force signal, a first logic signal and a second logic signal is obtained. When the first logic signal is obtained, the body of the electric vehicle is controlled to keep stable. When the first braking force signal and the second logic signal are obtained, a motor is controlled to apply braking force to an outside front wheel. When the second braking force signal and the second logic signal are obtained, motors are controlled to apply braking force to the outside front wheel and an inside rear wheel.

A method of reconstructing a detected faulty signal. A pitch sensor fault is detected by a processor. A signal of the detected faulty pitch sensor is reconstructed using indirect sensor data. The reconstructed signal is output to a controller to maintain stability.

A method of reconstructing a detected faulty signal. A pitch sensor fault is detected by a processor. A signal of the detected faulty pitch sensor is reconstructed using indirect sensor data. The reconstructed signal is output to a controller to maintain stability.

Various embodiments of an apparatus and method for monitoring a brake operation are disclosed. In accordance with one aspect, the brake operation monitoring system comprises a plurality of wheel speed sensors, a brake demand sensor; a plurality of stability sensors and a controller. The controller comprises wheel speed ports; a brake demand port; stability sensor ports; a communication port for receiving a plurality of messages; and a processing unit comprising control logic. The control logic receives a brake demand signal, at least one stability signal indicative of the cornering of the vehicle, and individual wheel speeds. The control logic calculates a master value to compare to individual wheel speed signals if the brake demand signal indicates no braking.

A physical quantity sensor includes: a base; wiring disposed in the base; a support that includes a first bonded surface bonded to the base and a second bonded surface bonded to the wiring; a suspension beam connected to the support; and an electrode finger supported by the suspension beam. The support is located between the first bonded surface and the suspension beam and includes a first overhang separated from the base.

A method of controlling a hybrid Non-ABS and ABS braking system of a vehicle. The method includes steps of: engaging an initial braking system based on a default setting or input from an operator of the vehicle; acquiring data from at least one sensor associated with the vehicle during the step of engaging the initial braking system; sending the data provided by the at least one sensor to a control module of the vehicle; analyzing the data provided by the at least one sensor; and disengaging the initial braking system and engaging a subsequent braking system when a predetermined condition is detected.

A method is described for computing a friction estimate between a road surface and a tire of a vehicle when the vehicle is in motion along a course, the tire being arranged on a steerable wheel of the vehicle, and the vehicle including two front wheels and two rear wheels and an axle rack pivotably attached to a linkage arm connected to the steerable wheel such that a translational motion of the axle rack causes the linkage arm to rotate about a kingpin element such that the linkage arm causes a turning motion of the steerable wheel. A corresponding system and vehicle are also described.