Definition and Basic Principles

It is a mechanical component that connects the car's accelerator pedal to the engine throttle, primarily serving to transmit the driver's action of pressing the accelerator pedal to the throttle, thereby controlling the engine's intake volume, adjusting the engine's speed and power, and achieving acceleration and deceleration of the car.

Structure and Composition

It usually consists of two parts: an inner core and an outer casing. The inner core is a steel wire responsible for transmitting tension; the outer casing is generally made of materials such as plastic or rubber, serving to protect the inner core and allow it to slide smoothly within. Both ends are typically equipped with special connectors for connecting to the accelerator pedal and throttle.

Working Process

When the driver presses the accelerator pedal, the pedal pulls the inner core of the throttle cable through the lever principle, transmitting the tension to the throttle, which increases the throttle opening, allowing more air to enter the engine combustion chamber. This air mixes with fuel and burns, thereby increasing the engine's power and accelerating the car. Conversely, when the driver releases the accelerator pedal, the tension in the throttle cable's inner core decreases, and the throttle returns to its initial position under the action of springs and other devices, reducing the intake volume, decreasing engine power, and slowing down the car.

Application Scenarios

Widely used in traditional fuel vehicles, especially in models that use mechanical throttle control. It is one of the key components for the driver to control the car's speed, playing a crucial role in various driving scenarios, whether on city roads, highway cruising, or climbing mountainous roads.

Advantages and Disadvantages

Advantages

Simple structure, relatively low cost, and easy manufacturing and installation, thus widely used in many economy cars.

High reliability, generally not prone to failure, and maintenance and replacement are relatively convenient.

The direct mechanical connection method allows for more direct and linear control of the throttle by the driver, providing a more precise handling feel.

Disadvantages

Due to the mechanical connection, there is a certain amount of friction and mechanical wear, which may lead to issues such as cable elongation and sluggish response after long-term use, affecting the car's performance and handling.

Its mechanical structure limits the precision of engine control, making it difficult to meet modern cars' higher requirements for fuel economy, emission control, and power performance.

Maintenance and Care Precautions

Regularly check the throttle cable for looseness, wear, or breakage; if any issues are found, they should be replaced promptly.

To reduce wear on the cable, it is advisable to regularly apply an appropriate amount of lubricant to the moving parts of the cable.

During driving, avoid excessive force when pressing the accelerator pedal to prevent over-stretching or damaging the cable.