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    冬季暖车要注意方法-Tips on vehicles' warm-up for cold start in winter

    作者:广州星展汽车配件有限公司 浏览:419 发表时间:2019-12-27 15:40:26

    冬季气温低,高纬度地区更是非常寒冷{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词}。当车辆在低温环境下停放一夜之后{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词},用户再次起动时会选择让车辆先原地怠速作为“热身”,等水温表指数超过60℃再驶上道路{{{澳门304永利com主词}主词}主词}。然而,网上也有很多言论说,车辆冷起动根本无需暖车{{{澳门304永利com主词}主词}主词}。那么,究竟应该听谁的?

    专业人员给出的结论是:

    须适当暖车,但切勿暖车过度,

    同时还要注意方法{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词}。


    暖车不当{{{澳门304永利com主词}主词}主词},会带来一系列不良影响


     1.长时间暖车会增加积炭

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    2.冷车怠速尾气污染严重

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    3.浪费燃油

    冷机状态下,发动机运转时的喷油量会增加,这毫无疑问会浪费掉不少的燃油。我们停车的位置多数是在住宅区、车库或支路的路边,通常与主干道之间还存在一定距离。与其说任由原地怠速白白消耗燃油,不如让发动机以低转速工况{{{澳门304永利com主词}主词}主词},驱动车辆慢速行驶到主干道后再加速进入正常行驶模式{{{澳门304永利com主词}主词}主词}。这样既可以实现暖车,又减少了燃油的无意义消耗{{{澳门304永利com主词}主词}主词},还不会浪费太多我们早上的时间{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词}{{{澳门304永利com主词}主词}主词}。



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    Winter is always cold especially in high latitude areas. When vehicles are parked for overnight in low temperature, “warm-up” at idling speed is necessary before they are restarted. It is suggested not to drive vehicles on road before the water gauge passes 60℃. However, different opinions from internet believe that it is not necessary to warm up in cold start at all. Whom on earth shall we follow then? 

    Professionals give a conclusion that 

    warm-up is necessary but never over acted, 

    and in the meanwhile,

     it should follow the proper ways.


    Improper warm-up will bring about adverse effects


    I. Long time warm-up will accumulate carbon deposit

    Engine coolant will be in very low temperature when vehicles stop in cold winter. The temperature sensor of the coolant will transfer the temperature signal to ECU as a reference for increasing fuel injection in cold start. When vehicles warm up at idling speed, the air volume intake is quite small, and then the engine in cold state requires more fuel volume injection to keep on running and heat the three-way catalyst. In this case, when vehicles start from cold state at idling speed, the mixture will be over-concentrated. Warming up vehicles at idling speed for long without increasing engine speed to heat up quickly, the over concentrated mixture will not be able to burn completely in the combustion room accumulating lots of carbon deposit in the combustion room and around the valves. 

    II.Exhaust pollution from cold idling is serious

    From the context above, long idling after cold start will leave the engine working in the condition of mixture over concentrated in long term, which gives rise to the high pollutent content in the exhaust. When vehicles start from cold state, engines will heat up gradually, assisting three-way catalysts to raise the temperature to normal working state. If the engine runs at idling speed all the way, the temperature of three-way catalyst will be raised too slow to dispose the pollutant in the exhaust effectively. Some friends even prefer to have a smoke nearby the vehicles which are idling to warm up, in which case, they are actually taking in the pollutents of the exhaust.  

    III.Waste of fuel

    Fuel injection will increase when engine runs from cold state, which for sure wastes plenty of fuel.  In most cases, vehicles are always parked in residential areas, garages or roadsides, away from main road. On account of this, it is better to drive the vehicles slowly to the main road and accelerate to normal speed rather than idling in-situ wasting of fuel. In this way, vehicles can be warmed up without wasting your time in the morning and in the meanwhile avoiding fuel waste. 



    Recommended way of starts and warm-ups


    Step one:  connect the power and wait for a while

    Turn the key (or press the button) to the position where the power is on, and wait for about 30 seconds. After power on, each control unit will finish self-inspection, and fuel pumps in the meanwhile work to transmit the fuel in the tank to the engine, recovering the pressure in the fuel system. Without this process, if the engine is started directly in the cold state, then the first start is usually tardy because the fuel is not in place yet.

    Step two:  start the engine and idle for a moment

    The engine oil will be almost all back to the oil sump after the vehicle parks overnight. When the vehicle restarts, the oil pump will work to transport the oil to each individual part of the engine again, which takes a process.  We do not need to worry about how long this process will take, just move the vehicle after the engine runs for 30 seconds (increase the engine load), when all the moving parts of the engine have been lubricated by oil to be free of severe wear and tear effectively.

    Step three: drive slowly at low speed to heat up the engine

    After the vehicle starts from cold state, let the engine run idling for 30 seconds, and then the idling speed will slow down than when it starts. As soon as the engine speed slows down and gets stable, it is time to gear forward and move.  But at this moment, the engine temperature is still very low, therefore it is better not accelerate the engine speed, but driving the vehicle for a while at 2000R per minute. Do not accelerate to speed up until the water temperature gauge moves to show the engine temperature passes 60℃.


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