the vehicle is cornering, the wheel ground contact area, and will lead to changes in wheel alignment change the steering characteristics. While the rear wheel vehicle technology can make the use of birth defects in a pneumatic tire rubber caused by the steering mechanism. This works like a steering wheel ESP system, i.e., when the vehicle moves at high speed through the braking one or several wheels, in order to maintain a stable posture of the vehicle is traveling.
1. The rear-wheel steering Glossary
the vehicle is cornering, the wheel ground contact area, and will lead to changes in wheel alignment change the steering characteristics. While the rear wheel vehicle technology can make the use of birth defects in a pneumatic tire rubber caused by the steering mechanism. This works like a steering wheel ESP system, i.e., when the vehicle moves at high speed through the braking one or several wheels, in order to maintain a stable posture of the vehicle is traveling.
2. The characteristics of turning traveling vehicle classification
steering characteristic generally be divided into understeer, neutral steer, and oversteer three cases.
1. Understeer actual performance of the vehicle steering angle is smaller than the bending angle of rotation of the front wheels, i.e. the front appeared slid outward, which is also known as turning “Tuitou”.
2. Oversteering performance of the actual steering angle of the vehicle is greater than the bending angle of rotation of the front wheels, the rear wheels is sliding outward appeared.
3. Neutral steering performance of the vehicle in the actual steering angle of the bending angle of rotation of the front wheels exactly, such a steering characteristic often maximum turning speed, but it also reduces the driver of the vehicle to some extent, subjective feelings close to the physical limit.
3. Effect on the vehicle steering wheel steering characteristics
and the presence of the front wheels with the steering wheel and reverse two cases, and both cases will exhibit two a completely different kind of steering characteristics. It is simply to increase with understeer, oversteer reverse the increase. Vehicle at low speeds, the front wheel can counter byAppropriately increasing the rotational oversteer. High-speed running vehicle when the situation encountered in the emergency lane, without the aid of any electronic assistant system, it is easy to oversteer tendency, the rear wheel is generated by a small but significant shift in the same direction of the front wheels you can compensate for oversteer tendency, which would allow the car a better balance.
the vehicle is cornering, the wheel ground contact area, and will lead to changes in wheel alignment change the steering characteristics. It should be said rear wheel steering vehicle technology can make the use of birth defects in a pneumatic tire rubber caused by the steering mechanism. This works like a steering wheel ESP system, i.e., when the vehicle moves at high speed through the braking one or several wheels, in order to maintain a stable posture of the vehicle is traveling.
At present, the rear wheel steering is achieved in two ways, one is achieved by a mechanical structure, the other is achieved by a motor or hydraulic. The rear wheel steering is achieved by the mechanical structure often passive, generally it relies on friction vehicle lateral ground during cornering to generate a small amplitude that the steering wheel.
4. Detailed steering wheel follower
This structure is very simple, it is not arranged in a complete rear wheel steering mechanism, but only in the rear wheel suspension the suspension between the vehicle body and the rubber cushion is arranged a number, and allow the suspension to the vehicle body by rubber to achieve a flexible connection, since there is a certain elasticity of the rubber, so that when the vehicle turns, the connecting point of the rubber cushion suspension can be subjected to transverse forces acting some degree of elastic deformation, so as to drive the wheels do change certain angle. The steeringAngle depends on the hardness of the rubber pad. The softer the rubber, the greater the steering wheel angle variable, but to reduce the differential stiffness of the suspension stability, the harder the rubber cushion, the rear wheel steering angle is smaller, but the suspension stiffness, high stability. Hence tradeoffs in the design of their advantages and disadvantages, according to the focus adjustment to make the actual use of an automobile, in general, in the rear wheel steering angle 3 degrees.
While this is a passive steering mechanism, but its structure is relatively simple, low-tech, low cost. So it can be applied in a number of economy cars such as Citroen models and so on.
5. Detailed steering wheel active
This structure is very simple, it is not arranged in a complete rear wheel steering mechanism, but only in the rear wheel suspension the suspension between the vehicle body and the rubber cushion is arranged a number, and allow the suspension to the vehicle body by rubber to achieve a flexible connection, since there is a certain elasticity of the rubber, so that when the vehicle turns, the connecting point of the rubber cushion suspension can be subjected to transverse forces acting some degree of elastic deformation, so as to drive the wheels do change certain angle. The steering angle depends on the hardness of the rubber pad. The softer the rubber, the greater the steering wheel angle variable, but to reduce the differential stiffness of the suspension stability, the harder the rubber cushion, the rear wheel steering angle is smaller, but the suspension stiffness, high stability. Hence tradeoffs in the design of their advantages and disadvantages, according to the focus adjustment to make the actual use of an automobile, in general, in the rear wheel steering angle 3 degrees.
While this is a passive steering mechanism, but its structure is relatively simple, low-tech, low cost. So it can be applied in a number of economy carsSuch as Beverly models and so on.