Recently, the whole country has entered a humid and rainy summer. With the increase of rainy weather in this season, how should we deal with it? Here, I will talk about the safety of driving in rainy days. Driving characteristics in rainy days According to the survey, the traffic accident rate of driving in rainy days is about five times higher than usual.Therefore, drivers must be alert when driving in rainy days.In rainy weather, the main factors that directly affect driving safety are blocked vision and changeable road conditions. For example, rain or fog in the car will make the windshield andcar windowGlassBlurred, and the light reflection and reduced road adhesion on slippery roads will make driving a vehicle more difficult than usual.In addition, encountering water on the road is also a big test for drivers when driving in rainy days.As the saying goes, "prepare for a rainy day". For people with cars, it is necessary to prepare in advance to calmly deal with complex driving situations. Maybe you can find your own preventive measures in the following introduction. Influence of road adhesion coefficient on driving Through the comparison of the adhesion coefficient under three different road conditions, we can easily see that the road adhesion coefficient will decrease with the increase of the road wetness when the vehicle is driving on the road with different degrees of wetness.At the beginning of rainfall, the road faceswheelThe adhesion coefficient of reaches the minimum value.At this time, due totyreThe ponding between the road and the road cannot be discharged in time, and the resulting power willtyreSlightly floating, forming a thin layer of water film between the tire and the road surface, so that the adhesion between the tire and the road surface is lost, which is the so-called "water slick" or "water film" phenomenon. At the same time, the road adhesion coefficient has a great relationship with the vehicle speed in rainy days.Driving on dry roads, as the speed increases,wheelThe adhesion to the road surface (also known as friction or grip) is almost unchanged.In rainy days, when the vehicle is driving on a wet road, the wheel grip will decrease with the increase of vehicle speed.When driving in rainy days, because the road is wet and slippery, the vehicle is easy to slip when the speed increases or the direction turns sharply. Therefore, do not step on the brake pedal or turn sharply at this timeengineBraking force decelerates. Safety points for driving in rainy days Combined with daily experience and usage habits, we summarized some safety points for driving in rainy days, including deceleration and anti-skid, light stepping on the brake, low-speed wading, clear vision and daily inspection. Deceleration and anti-skid Due to the particularity of the road conditions in rainy days, the vehicle speed should be properly reduced when driving. When preparing to stop, it is better to start decelerating 100~200 m in advance, leaving enough reaction time for the vehicles behind and enough braking distance for themselves to avoid rear collision.It is also important to note that you should not follow the car too closely when driving in rainy days, let alone overtaking frequently.Especially when overtaking a large vehicle, the water splashed by the cart will make the driver of the cart not see clearly the outside of the vehicle, which is easy to cause danger. When the vehicle skids in rainy days, if the front wheel skids, it should be corrected in the opposite direction of the sideslip;If the rear wheel slips, correct it in the same direction as the side slip. Gently step on the brake When driving in rainy days, the brake shall be applied in the form of "braking", and the brake pedal shall be continuously lightly stepped to make the brake force output stable and even, so as to avoid wheel locking.In case of side slip due to braking, immediately cancel the braking, shift the transmission into low gear, and useengineThe braking force achieves the purpose of deceleration. Low speed wading Among experienced old drivers and self driving enthusiasts, there is a saying that "quick sand walking, slow water walking", in which "slow water walking" refers to effective measures taken when wading in rainy days.The vehicle cannot drive too fast when wading, because too fast a speed will splash water and suck in airFilter, causing the engine to stall.Before wading, observe the depth of ponding. Generally, when the depth of ponding exceeds the front bumper, it is recommended not to continue driving. Basically, the ponding depth does not exceed half of the wheel or reaches submergenceexhaustThe depth of the pipe can be safely passed.When wading, use the low gear of the transmission and hold the accelerator firmly. Do not stop halfway, shift gears or turn sharply.If the engine stalls during wading, do not continue to try to start the engine to prevent water from entering the engine and causing damage to the vehicle. Clear vision With the increase or decrease of rainfall, the wiper speed should be adjusted to maintain the windshieldGlassTransparent.When it rains, the air flow in the enclosed car space is poor, and it is easy tocar windowFog is formed on the top of the carair conditionerThe cold or warm air function demists.The difference is that,air conditionerThe cold air demists quickly, and the fog will reappear soon after the air conditioner is turned off.Although the air conditioning heater is slightly slow in demisting speed, the demisting effect is complete, and it is not easy to fog again after the heater function is turned off. Daily inspection Regularly check the condition of the vehicle to avoid confusion in rainy days.The inspection includes replacing the wiper blade once a year, adding glass water regularly, checking the tread depth and wear condition of the tire regularly, checking whether the air outlet of the air conditioner facing the windshield glass is unblocked, dredging the vehicle drainage channel regularly, and cleaning the dirt around the water outlet.This kind of inspection can be done by ourselves in our daily life. It seems simple, but it can ensure the safety of driving in rainy days.(Editor: Du Yang) Zhuozhong Automobile Network
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