What is the rear brake hose of a car?
The rear brake hose, usually referring to the brake hose (commonly known as the brake tube) installed on the rear wheel braking system of a car, is a key component in the car's braking system that is responsible for transmitting the braking medium (such as brake fluid or compressed air) and ensuring the effective transmission of braking force.
Its main function is to, when the driver depresses the brake pedal, precisely transfer the pressure of the braking medium (brake fluid or compressed air) to the brake calipers or brake shoes of the rear wheels, thereby driving the brake to generate braking force and achieve vehicle deceleration or stopping.
Main features and classification
Classification by braking form:
Hydraulic brake hose: Used in hydraulic braking systems, it transmits brake fluid to achieve braking, and is currently the most common form in passenger cars.
Air brake hose: Mostly used in air braking systems of heavy trucks, buses, etc., it transmits braking force through compressed air.
Vacuum brake hose: Used in vacuum-assisted braking systems, it assists braking by using the vacuum generated by the engine intake manifold, and is commonly seen in older models.
Classification by material:
Rubber brake hose: Usually adopts a three-gel two-wire (EPDM tri-acrylonitrile butadiene styrene rubber + woven fiber layer) structure, with good flexibility, convenient installation, and strong tensile strength, but the outer layer is prone to aging and cracking over time.
Nylon brake hose: Has better anti-aging and corrosion resistance, suitable for high-temperature or corrosive environments, but its tensile strength will decrease in low temperatures and it is prone to cracking under external force impact.
Importance and maintenance suggestions
The rear brake hose is one of the core components for ensuring driving safety. Its condition directly affects the braking effect. If it shows signs of aging, cracks, bulges, oil leakage, or loose connections, it may cause braking lag, insufficient braking force, or even complete failure.
Recommendations for inspection: Regularly (suggested every 30,000 to 60,000 kilometers) inspect the appearance of the hose, observing for cracks, bubbles, scratches, leakage, or hardening, and confirming whether the connections are tight.
Recommendations for replacement: Even if there are no obvious damages, it is recommended to perform preventive replacement every 30,000 to 60,000 kilometers based on the vehicle's usage and the manufacturer's manual to ensure the braking system remains in a reliable state.
Caution in use: Avoid driving the vehicle on rough roads, potholes, etc., to prevent the hose from being scratched by sharp objects or being overly stretched.
When purchasing, prioritize choosing products from reputable manufacturers with CCC certification, clearly marked production factory name and date, and provide the vehicle's vehicle identification number (VIN) to ensure compatibility with the original factory specifications. Do not use inferior products without labels.
The rear brake hose is a key component in the braking system. Its core function is to, during braking, precisely transfer the pressure of the braking medium (such as brake fluid or compressed air) to the brake calipers or brake shoes of the rear wheels, thereby generating braking force and ensuring that the vehicle can safely and stably decelerate or stop.
Specifically, the functions of the rear brake hose can be summarized as follows:
Transmitting braking force: As a flexible connection channel between the master cylinder and the rear wheel brakes, it is responsible for transmitting the hydraulic or pneumatic pressure generated by the driver pressing the brake pedal without loss or delay to the rear wheel braking system, achieving the braking effect.
Adapting to vehicle movement: Due to the vehicle's movement on uneven roads, the rear brake hose must have good flexibility, being able to freely bend with the component displacement while ensuring the internal medium flow does not stop.
Ensuring braking stability: High-quality rear brake hoses adopt a multi-layer composite structure (such as "three-gel two-wire"), with high tensile strength, resistance to cracking, resistance to high and low temperatures, resistance to ozone and corrosion, ensuring that they do not burst or age and fail under extreme conditions or emergency braking, maintaining stable braking performance. Improving Driving Safety: As one of the "lifelines" of the braking system, the reliability of the rear brake hose directly affects the braking efficiency of the entire vehicle. Once it undergoes aging, cracking, bulging, or has a joint leak, it will result in a decrease in braking force or even braking failure. Therefore, it is necessary to conduct regular inspections and replacements.
Depending on the material, rear brake hoses are mainly divided into rubber type (with good flexibility and easy installation, but prone to aging) and nylon type (resistant to aging and corrosion, but the tensile strength decreases at low temperatures). Owners should choose according to the vehicle's usage environment and perform regular maintenance.
Maintenance suggestions: It is recommended to inspect once every 3 to 6 thousand kilometers. If cracks, bubbles, oil leakage or loose joints are found on the surface of the hose, it should be replaced immediately. Do not drive with a faulty hose.
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