What causes the left turn squeaking in Audi A6L?
1 Answers
The reasons for left turn squeaking in Audi A6L include: aging of the steering tie rod ball joint; leaking of the steering gear dust cover; and dirty power steering fluid. Mechanical Hydraulic Power Steering System: Main components: The mechanical hydraulic power steering system generally consists of a hydraulic pump, oil pipes, pressure and flow control valve body, V-type drive belt, oil reservoir, and other parts. Working principle: Regardless of whether the vehicle is turning or not, this system operates continuously. At low speeds during sharp turns, the hydraulic pump needs to output more power to provide greater assistance, which to some extent wastes resources. Driving such a car, especially during low-speed turns, the steering feels heavier, and the engine works harder. Additionally, due to the high pressure of the hydraulic pump, the power steering system is more prone to damage. Moreover, the mechanical hydraulic power steering system, composed of a hydraulic pump, pipelines, and oil cylinder, always operates to maintain pressure, whether steering assistance is needed or not, resulting in higher energy consumption, which is another reason for resource wastage. Generally, economical cars use mechanical hydraulic power steering systems more frequently. Electro-Hydraulic Power Steering System: Main components: Oil reservoir, power steering control unit, electric pump, steering gear, power steering sensor, etc., where the power steering control unit and electric pump are integrated. Working principle: The electro-hydraulic power steering system overcomes the shortcomings of traditional hydraulic power steering systems. The hydraulic pump it uses is no longer directly driven by the engine belt but employs an electric pump. All its working states are calculated by the electronic control unit based on signals such as vehicle speed and steering angle to achieve the optimal state. Simply put, during low-speed sharp turns, the electronic control unit drives the electro-hydraulic pump to operate at high speed, outputting greater power to make steering easier for the driver. When the car is driving at high speed, the hydraulic control unit drives the electro-hydraulic pump to operate at a lower speed, saving some engine power without affecting the need for high-speed steering.
