What is the Principle of Modifying a Heavy Car Steering Gear to Light?
2 Answers
Working principles are similar in that they both utilize a hydraulic pump (driven by the engine belt) to provide oil pressure that pushes the piston, thereby generating auxiliary force to move the steering linkage and assist in wheel steering. The difference lies in the driving method of the oil pressure pump. Mechanical hydraulic power steering directly drives the hydraulic pump via the engine belt, while electro-hydraulic power steering employs an electric pump driven by electricity. Below is relevant information: 1. Reasons for a heavy steering wheel: Like other automotive fluids, power steering fluid needs to be replaced. Another scenario is low tire pressure, which can also make the steering wheel feel heavier, and in severe cases, may even lead to a tire blowout due to insufficient pressure. 2. Precautions: While driving, avoid holding the steering wheel at full lock for extended periods, especially during turns and reversing. Prolonged full lock can cause the power steering pump's oil pressure to drop too low, potentially damaging the pump and resulting in a heavy steering wheel condition.
I think the principle behind lighter steering in cars mainly relies on power steering systems. For example, I used to drive older cars where the steering wheel was super heavy—it felt like lifting weights at the gym. In contrast, modern cars feel much lighter, thanks to hydraulic power steering or electric power steering. In hydraulic systems, an oil pump connected to the engine transmits pressure through pipelines to the steering gear. When you turn the steering wheel, sensors detect increased torque, and the system automatically pressurizes the hydraulic fluid to assist the steering shaft, reducing the effort required from your hands and making the car more responsive. This makes long drives much easier on the wrists. Many modern cars now use electric power steering, replacing the hydraulic pump with an electric motor. The electronic control unit precisely adjusts the assist force, improving fuel efficiency and reducing noise. In short, mechanical force is amplified by smart systems, transforming stiff steering into effortless control and making driving much more comfortable. That’s why many people test this feature when buying a new car.
