Ten Mistakes in Driving Safety Car Maintenance

There are many mistakes in the maintenance and use of automobiles. Some common-sense errors are not only commonplace for newcomers, but some older drivers are sometimes unavoidable. Some wrong practices in the maintenance and use of the car may not only damage the car itself, but also threaten traffic safety.

Myth #1: High block overtaking or climbing high gears with low torque, slow response to the throttle, acceleration slows down, it is dangerous to overtake with high gear, correct overtaking should be slowed down, and the automatic gear only has to step on the throttle.

The high gear climbing is also dangerous. When the high gear and large throttle are in the slope, the vehicle's running resistance is large, the engine speed is low, the air-fuel mixture in the combustion chamber is less disturbed, and the flame speed triggered by the spark plug is slow, making the combustible mixture deflagrate automatically. . Prolonged and intense deflagration will cause local overheating, melting of related parts and damage, and may also cause excessive engine crankshaft load and excessive crankshaft torque, resulting in malignant accidents such as burned tiles and even broken crankshafts.

Myth 2: Engine oil is better. When the oil in the engine oil pan is insufficient, the lubrication is insufficient, the friction is increased, and the engine is damaged; however, if the engine oil is excessive, the crankshaft shank and the big end of the connecting rod will generate violent agitation when the engine is working, making the engine unstable. There is also an increase in oil splashing on the cylinder wall, resulting in failure of the burn-in oil, and in certain circumstances it may also be dangerous. Therefore, the oil should be controlled between the high and low scoring lines of the oil gauge.

Misunderstanding 3: First, after the clutch brake some people afraid of the brake off, to develop a brake before the habit of stepping on the clutch; and some believe that cutting off the power after the brake will be more effective, this is wrong, in any case, stepping on the clutch will Increase the inertia of the car. After the clutch is depressed, the engine speed is rapidly reduced to idle, and the total vacuum of the intake pipe is reduced. The assist force of the vacuum booster is greatly reduced, and the braking distance becomes longer and the brake is not strong. The correct approach is to step on the brake first and then step on the clutch when the vehicle is stopped quickly.

Misunderstanding four: brake while turning. When the car turns under the action of centrifugal force, the center of gravity moves outward. At this time, the brake will increase the roll, resulting in unilateral braking. If the speed is too fast or the brake is excessive, there is a risk of overturning. The correct approach should be to reduce the speed before entering the corner into low gear. After entering the corner, slowly add fuel to keep the body stable. At the same time, to maintain the principle of “slow forward and fast exit” when cornering, cross the corner from the outer corner of the lane, try to Straighten the bend.

Misunderstanding 5: Downhill neutral shift is not only fuel-efficient, but also convenient for carburetor vehicles to put neutral gear to save fuel, but EFI vehicles will save fuel when they slide at high speeds. It is dangerous to control the speed only with the brakes, especially long slopes and steep slopes. Because the brakes are used for a long time, the brake linings will be overheated, the friction coefficient will decline, and the heat will decline. As a result, the braking performance of the vehicle will be degraded or even fail. The correct approach is to put a suitable gear according to the actual speed, so that the engine brake, supplemented by brakes, when encountering steep slopes or winding roads, it is very important to rely on gear braking.

Myth #6: Suddenly when the water brakes or the rainy days drive at high speed, the wheels suddenly press down on the surface of the accumulated water. Many people first respond to the brakes, and it is easy to slip. It is dangerous to control the steering wheel. The brakes are more important and safer.

Raining on muddy roads, suddenly banging on the throttle or suddenly relaxing the throttle can also cause slippage. Because the car suddenly hits the throttle at high speed, it will cause the car to suddenly decelerate, causing momentary braking between the wheels and the ground, thus resulting in side slip; while the sudden increase in throttle is opposite to sudden increase in speed, it is easy to produce side slip. Therefore, rain should be running at a low speed and be controlled smoothly.

Misunderstanding 7: When someone is driving, they like to lock the central door lock after starting the car. They think this is safe. Actually, this is extremely dangerous. After the central lock is locked, once the car has an accident, it will not open the door and the danger rate will increase dramatically. It is best not to lock the central door lock during normal driving, and lock the central door lock when traffic jam or other traffic lights.

Misunderstanding 8: The stronger the high-beam lights at night, the safer or the safer the fog lights. The safer the lighting angle is, the safer the lights are. The higher the lights are, the brighter the lights are, the more dangerous it is, because it will affect the sight of the opposite vehicle. Driving a fog lamp at night is not only unsafe, but it is even more dangerous. In particular, the white beam of the front fog lamp is very strong, affecting the vehicles that are facing the opposite direction and affecting their own safety. In bad weather, fog lights should be turned on day or night.

Misunderstanding 9: Although far away from summer, there are many misunderstandings in the summer season that need attention. Good low tire pressure in summer. Summer temperatures are high, and some drivers are afraid that tires will heat up, causing tire pressure to be too high and punctures, and some even artificially reduce tire pressure. In fact, tire pressure is more dangerous than tire pressure. When the tire pressure is too low during driving, the temperature inside the tire will increase rapidly. It is easy to puncture the tire by driving too fast and endanger the driving safety. In addition, too low tire pressure can cause tire deformation, increased wear, and increased fuel consumption. Professional measurement of tire pressure, maintaining normal tire pressure is particularly important during summer driving.

Misunderstanding 10: The cooler the engine cooling water, the better. In hot summer weather, some drivers think that the engine cooling water temperature is as low as possible. In fact, an excessively low water temperature can damage the engine. Automobile engines are both afraid of heat and cold. If the cooling water temperature is too low, fuel combustion will deteriorate, fuel consumption will increase, wear and tear will increase, oil viscosity will increase, and engine power will decrease. Different models of engines may not have the same water temperature requirements, and the key must be controlled within a reasonable range.