Hydraulic assisted power steering (HPS) represents a significant advancement in steering technology, combining the benefits of hydraulic power assistance with the traditional steering system. By utilizing hydraulic pressure, HPS reduces the effort required for steering, improving control and driver comfort. In this article, we will explore the features, benefits, and workings of hydraulic assisted power steering.

Working Principle:

Hydraulic assisted power steering operates on the principle of hydraulic pressure generated by a power steering pump. The power steering pump is typically driven by the engine via a belt and pulley system. When the driver turns the steering wheel, a valve in the power steering pump opens, allowing pressurized hydraulic fluid to flow into the steering gear assembly. The hydraulic fluid applies force to assist with steering, reducing the effort required from the driver.

Components of Hydraulic Assisted Power Steering:

1. Power Steering Pump: The power steering pump is a critical component of the hydraulic assisted power steering system. It consists of a pump body, impeller, and pressure relief valve. The impeller, driven by the engine, draws power steering fluid from the reservoir and generates hydraulic pressure.
2. Steering Gear Assembly: The steering gear assembly, also known as the rack-and-pinion system, converts the rotational motion of the steering wheel into the linear motion required to turn the wheels. The hydraulic pressure from the power steering pump assists in moving the steering gear, making it easier for the driver to turn the wheels.
3. Hydraulic Lines and Hoses: Hydraulic lines and hoses transport the pressurized fluid between the power steering pump, steering gear assembly, and reservoir. These lines are designed to withstand high-pressure conditions and ensure the smooth flow of hydraulic fluid throughout the system.

Benefits of Hydraulic Assisted Power Steering:

1. Reduced Steering Effort: The primary advantage of hydraulic assisted power steering is the reduction in steering effort required from the driver. The hydraulic pressure generated by the power steering pump assists in turning the wheels, particularly at low speeds or during maneuvers, such as parking or making tight turns. This enhances control and makes steering more effortless, resulting in reduced driver fatigue.
2. Improved Maneuverability: Hydraulic assisted power steering significantly improves the maneuverability of vehicles. The power assistance enables drivers to navigate with greater ease, making it possible to maneuver in tight spaces or negotiate sharp corners more smoothly. This enhances overall vehicle handling and makes driving in urban environments or congested areas more comfortable.
3. Responsive Steering Feel: Hydraulic assisted power steering provides a responsive and intuitive steering feel. The hydraulic system responds to the driver’s input quickly and accurately, translating the steering wheel movements into precise wheel movements. This allows for better control and enhances the driver’s confidence and connection with the road.
4. Enhanced Safety: The power assistance of hydraulic assisted power steering contributes to improved safety. With reduced steering effort, drivers can make quick and precise steering adjustments, especially during emergency situations or when evasive maneuvers are required. The enhanced control and maneuverability offered by HPS can help prevent accidents and enhance overall vehicle safety.

Conclusion: Hydraulic assisted power steering combines hydraulic power assistance with the traditional steering system, offering improved control and comfort to drivers. By reducing steering effort, enhancing maneuverability, providing responsive steering feel, and contributing to safety, hydraulic assisted power steering has become a standard feature in many modern vehicles. This technology strikes a balance between manual steering and advanced electric power steering systems, making it a reliable and popular choice for a wide range of vehicles. With its proven performance and widespread adoption, hydraulic assisted power steering continues to play a vital role in enhancing the driving experience.