Earn big eyes and take a closer look at the exposure of the 10 wrong operations of driving

If you have ABS, you can drive fast

At present, many cars are equipped with an anti-lock brake system ABS, and some drivers believe that the stability and safety of such cars are absolutely reliable. But in fact, it's not. ABS has two functions: one is to prevent the wheel from locking when the car brakes, which improves the steering stability of the car during braking, and the other is to control the tire slip rate at 10% to 20% to improve The braking force of the vehicle. However, ABS is to prevent the wheels from slipping due to wheel locking during emergency braking, and sometimes the braking distance is more than that of a general braking system car

The distance is longer, and bad roads such as slippery roads and rough gravel roads may cause accidents. Therefore, when driving a car equipped with an ABS anti-lock braking device, you should not blindly drive fast. You should still pay attention to early braking to ensure driving safety.

Quickly step on the accelerator to start the EFI vehicle

When the engine starts cold, due to the low temperature and poor atomization conditions of the mixture, it is difficult to ignite, so it is often necessary to supply an extremely rich mixture. The engine equipped with an electronic control device is different from the engine equipped with a carburetor. In order to enrich the mixed gas during cold start, the fuel injection amount at the start is from the basic injection amount (equivalent to the fuel supply from the starter system in the carburetor The two parts are combined, and some models are also equipped with cold start nozzles on the intake manifold. In addition, when the EFI engine starts at a low temperature, the air-assisted valve plays a similar role to the fast idling mechanism of the carburetor. It automatically controls the intake air flow when the engine is started, and the driver does not need to control the throttle. Therefore, when an EFI vehicle starts, there is no need to step on the accelerator, and it is not necessary to step on it continuously before starting, otherwise it will cause poor engine starting.

Start the diesel car to go to the accelerator

Some diesel vehicle drivers often have to press the accelerator pedal back and forth several times before starting the diesel vehicle before starting. This method of operation is incorrect. Because, as we all know, gasoline vehicles often have to step on the accelerator pedal a few times before starting (especially in winter), the purpose is to make the carburetor accelerator work, inject more fuel, and enrich the mixture to meet the needs of starting; The operation of the car before starting will only increase the wear of the fuel injection pump control device and the oil quantity adjustment mechanism, and will not enrich the mixture. Because the fuel required by the diesel car is generated by the injection pump cam through the tappet to push the plunger to generate high pressure, and then injected into the cylinder through the injector. If the engine is not running and the plunger does not move up and down, the fuel will not enter the cylinder, and of course it cannot enrich the mixture. The correct method is to use the hand oil pump or electric pump to pump oil before starting, so that the low-pressure oil circuit has enough fuel so that more fuel enters the cylinder during starting to achieve the purpose of rapid start.

Throttle after starting

After starting the engine, due to the low temperature of the engine body, it is not easy to stabilize. Some drivers are afraid of the engine stalling and continue to blast the throttle. Others step on the throttle to make the engine run at high speed. This is a wrong approach. Because, the throttle throttle not only aggravates the wear of the cylinder, but also may cause the accident of burning the tile and holding the shaft. When the engine is cold-started, the lubricating oil has a high viscosity, poor fluidity, insufficient lubrication of components, and is in a semi-dry or even dry friction state. At the same time, due to the low body temperature and incomplete combustion of the air-fuel mixture, some of the fuel in the air-fuel mixture will dilute the oil, which will also increase the wear of the engine. In addition, due to the violent throttle, the engine speed suddenly changes, the load of the moving parts increases and decreases suddenly, the piston forms an irregular impact movement in the cylinder, causing impact wear between the piston and the cylinder wall, accelerating the cylinder out of round And the formation of the cone shape accelerates the damage of the piston ring, the piston pin, the copper sleeve, and the large and small tiles. The correct method should be: after starting, it should be switched to idle speed. In winter, the engine is easy to shut down due to low temperature. You can step on the throttle or pull the choke to let the engine run at high idle speed and maintain this state for 3 to 5 minutes.

Driving on a rainy day suddenly relaxes the throttle

The road surface is relatively slippery in rainy days. If the brakes are improperly applied, side slipping may occur. Suddenly accelerating the throttle or suddenly relaxing the throttle on muddy roads in rainy days can also cause side slipping, but it is often overlooked. This is because when the car is driving at a high speed, the throttle is suddenly loosened, and the transmission part is decelerated by the idle speed of the engine. This sudden deceleration is then transmitted to the wheels, causing an instantaneous braking between the wheels and the ground, thus causing side slip . Jerking the throttle will also produce side slip. Therefore, don't stop at high speed on rainy days. In addition to the correct use of brakes when decelerating, the throttle relaxation should also be alleviated. When accelerating, you should also hold the throttle slowly to increase the throttle, drive at a low speed, increase the friction coefficient and torque, and pass safely.

Frequent braking on long downhill slopes

When the car goes down a long slope, if the driver steps on the brake pedal for a long time, or frequently uses the brake intermittently, it will be extremely harmful to the vehicle and will also pose a serious threat to traffic safety. Because the brakes are used for a long time, the brake pads will overheat and the friction coefficient will decrease, resulting in thermal degradation, resulting in reduced braking performance or even failure. In addition, it will increase the wear of the brake shoes and reduce their service life. Therefore, the speed of the car should be reduced in advance before going down a long slope. When going down a long slope, if the vehicle speed is accelerated, you can quickly depress the brake pedal to reduce the vehicle speed, then quickly release the pedal, if you need to lower it again, you can repeat this method.

New car dragging

During the running-in period of the new car, it should be noted that the power of the vehicle should be consistent with the gear at any time, and the gear should be shifted in time according to the power of the engine. Otherwise, it will easily cause early damage to the engine. Because low gear and excessive throttle will cause the engine to rotate at high speed; high gear and slow speed will cause insufficient power and also affect the normal operation of the engine. Both will accelerate engine wear. Therefore, when driving a new car, especially during the running-in period, the driver should have a good grasp of the power and gears, and can not drag the vehicle.

Continuous acceleration during driving

Some drivers prefer to continuously refuel under engine load. There are two main reasons for this situation: one is that the engine is faulty, not to find the cause and eliminate it seriously, but to change the working condition of the engine through continuous rapid acceleration; the second is not to start according to the regulations in winter, afraid of trouble to save trouble , And finally started, worrying about turning off the flames, so continuously accelerated. As everyone knows, this approach is very easy to cause the following undesirable consequences: easy to ablate platinum to cause poor engine operation; easy to damage the timing gear, causing the engine to not work. Because of the continuous rapid acceleration method, the meshing force between the timing gear and the meshing pair will change suddenly, and it is easy to break the timing gear, causing the matching mechanism and gasoline pump to fail to work.

Use reduced speed to save fuel

Some drivers believe that the lower the engine speed, the lower the fuel consumption. Therefore, some wrong practices are adopted in driving. For example, when the actions of starting, accelerating, and shifting up are completed, the low gear is shifted to the high gear within a short distance, and as a result, the car often drags the gear. Sometimes when the vehicle load is heavy, high-end driving is forced to reduce the engine speed. As a result, the engine speed is unstable, the deflagration is serious, the power decreases, and the fuel consumption increases. Therefore, it is not possible to save fuel by reducing the engine speed.

Glide down the long slope flameout

Many cars are equipped with steering, clutch, braking and other power-assist devices. These devices can only work when the engine is running and powered. Once the engine is out of gear for a long time, the steering may be heavy, the ABS system may fail, the clutch pedal may become heavy, or even fail. At the same time, the stall in neutral flame will also cause insufficient vacuum or air pressure, resulting in poor braking performance and affecting driving safety; causing premature damage to the transmission synchronizer. This is because, when the car is coasting in neutral gear, the first and intermediate shafts of the transmission do not rotate, and only the second shaft rotates under the action of the rear wheels. The oil on the ring dries quickly with the rotation of the two shafts, so there is almost dry friction between the synchronizer cone ring and the cone disk during gear shifting, which increases the wear between the two and causes premature damage to the synchronizer. In short, under the premise of ensuring driving safety, although the gear can be adopted to coast, the engine must not be turned off, nor can it be turned off in neutral.