Winter in south is like spring all year round, so there is no need to change your driving style, but in north it snows heavily in winter, people are cold, and car will naturally feel "cold". ", so what should we do? This brings us to today's topic "The right way to warm up a car in winter." Many acquaintances may not agree with this, and believe that warming up a car now, when level of domestic automotive technology is high, is not necessary! Is it really unnecessary? Shopkeeper 4S: If car is not warmed up in winter, it will drive for ten years less!
The reason for a hot car is that after car has been sitting for a while, oil in engine will drain back into oil pan at bottom of engine. Therefore, when engine has just caught fire, upper half of engine is in a state of lack of oil and lubrication. After engine starts, for about 30 seconds, oil pump supplies oil to piston, connecting rod, crankshaft and other engine parts.
Actually, time to warm up car in winter is not as long as everyone imagines. After getting into car and starting car, fasten seat belt, look in left and right rear-view mirrors, and then wipe off water vapor on windshield glass. This will take less than a minute. When all this is completed, we can move at a low speed. At this time, we need to pay attention to maintaining speed at 2000 rpm. When temperature of water in engine is about 90°, it means that engine has reached normal operating condition, you can drive normally.
Do not warm up machine on spot! After car has warmed up for a long time on spot, burning more oil is out of question. Since engine idle speed is low, generated heat is also low. If you want to rely on idling to quickly increase engine temperature, it will be slower. It's better to heat up faster when you're driving. At same time, when engine is idling for a long time, combustion is not complete and deposits are easily generated.
After starting in winter, water temperature will be lower than normal temperature, and speed can be gradually increased after water temperature becomes normal. After igniting car, wait for some time in place (the waiting time depends on relatively stable time after speed drop, usually no more than one minute). For example, when vehicle speed exceeds 2000 rpm when vehicle is first started, after about 30 seconds to 1 minute, engine tachometer needle drops to about 1200 rpm (but does not reach normal idle speed). 800-1000 rpm at this time), and in principle there are no obvious fluctuations in stability, and the body does not have obvious vibrations. In this case, you can start with gears.
In winter, an automatic transmission vehicle should be kept in D and kept below 2000 rpm for 3-5 minutes to warm up vehicle. In winter, viscosity of oil in automatic transmission will increase. At beginning, even if oil pump is running, many cars will lag when upshifting. At this time, if you immediately press gas pedal very hard, it is highly undesirable to rush to increase engine speed in order to force machine into an upshift.