English
中文简体
Highways in plateau and hilly areas are mostly built according to the natural and geographical conditions. The road conditions are extremely complex, with steep slopes and long roads. The continuous up-and-down slopes generally reach more than ten kilometers, and the longest ones reach more than ten kilometers. The slope generally reaches 20 °. In addition, the road construction is difficult, and the road surface is generally narrow. Most of them are around mountains or near mountains and rivers, with continuous twists and turns and poor vision. When driving on such roads, it is often necessary to make preparations for avoiding and stopping. Due to frequent use of the brake, it is easy to cause the temperature of the brake shoe to rise, the friction coefficient of the friction plate to drop sharply, the brake air pressure to be insufficient, the brake fluid to produce gas resistance, and so on, which will reduce the brake efficiency, and even cause the brake failure in serious cases, resulting in the tragedy of vehicle damage and death. Therefore, when driving in plateau and hilly areas, in addition to doing a good job in vehicle maintenance and repair to ensure reliable braking efficiency, some corresponding maintenance measures must also be taken.
1、 The safety inspection shall strengthen the inspection before and on the way out, especially the technical conditions of braking, steering, transmission and wheel parts must be intact to ensure reliable operation.
2、 Before the pipeline inspection is going downhill, especially on some long and steep slopes, be sure to stop the vehicle and observe the situation of the highway, and then carefully check the brake system to see whether the air pressure is intact, whether the air pressure is sufficient, whether the brake pipeline leaks air (air brake), oil leakage (hydraulic brake), and whether the connecting parts are loose. In case of any situation, we should solve it in time and never take any chances. After the above items are confirmed, go downhill.
3、 Correct braking uses the traction effect of the engine and the foot brake to control the vehicle speed. It is forbidden to step down the clutch pedal or slide in neutral, and avoid emergency braking. In order to save fuel, some drivers blindly slide in neutral when going downhill, or even turn off the engine, which is very dangerous. When going downhill, the center of gravity of the car moves forward, and the inertia force becomes the driving force of the downhill, which naturally accelerates the driving speed of the car. The steeper and longer the slope, the heavier the car, the faster the speed. The driver has to use the brake to reduce the speed to ensure driving safety. In addition. Frequent use of foot brake will cause a large loss of air pressure in the air reservoir and insufficient air supply of the air compressor, which may eventually lead to ineffective braking. If the traction force generated by the engine not separating from the transmission device is used to reduce the vehicle speed when going downhill, the car will not overspeed. The lower the gear, the better the traction force, avoiding frequent braking and ensuring safety.
4、 Scientific driving When the downhill slope is relatively long and there are especially many sharp curves, you can drive in sections. After running for a distance, stop at a place with a gentle slope and good front and rear view. On the one hand, let the air reservoir be full of air, on the other hand, let the brake drum and shoe cool down, and then drive again.
5、 Cooling the brake drum When the car is running, the brake efficiency will decrease significantly with the increase of the brake drum temperature. Therefore, the car is equipped with a water reservoir. Before going downhill, turn on the water reservoir switch to make it pour water on the outer surface of the brake drum to cool down, which can effectively improve the brake efficiency.
6、 Most vehicles that use high-quality brake fluid for hydraulic braking use alcohol-based brake fluid, and the alcohol contained in it is very volatile. Frequent braking is easy to increase the temperature of the brake pipeline and cause air resistance, which will lead to brake failure. If some high-quality brake fluid with high boiling point and not easy to deteriorate is selected, the driving safety factor can be greatly improved.
In short, no matter how bad the driving conditions in plateau and hilly areas are, as long as you properly control the speed and braking, and always be careful, your safety will be guaranteed.
