Some netizens responded，When you are on a business trip，I will put my car on the airport overnight。So the question is here，After the business trip came back ... the overnight car started，Delivery of idle speed is 1400; no need to worry about turning off at all，No need to step on the accelerator for shift gear，You can reach 35 yards without stepping on the throttle，Four gear speeds will not go up，Obviously struggling; after the water temperature meter comes up，The idling speed is only more than 500。What's going on，Or does the fuel injection is intelligent?

? In fact, this is normal，That is called cold start。90%of the engine wear occur at low temperature，low Seabettemperature，Especially after the car was put on a night，The lubricant inside the engine will return to the oil bottom due to gravity factors，At this time，If the engine is activated，The engine wear is the most serious，Generally speaking，The engine oil pump is connected to the crankshaft or camshaft，As long as the engine is running，Caudie axis Rotary，Mechanical oil pump will quickly pump the oil to the lubricant，but，Due to the large oil viscosity in the low temperature environment，Low temperature liquidity poor，Many lubricating effects that are lubricated by splattered lubrication are poor。

? After one night，Start at work the next day，I found that the speed is always kept at 1200 rpm，and usually only 800 rpm when driving，Don't worry about this，This is the control strategy that our designer deliberately sets in the central processor，The purpose is to speed up the hot car，After the water temperature comes up，Speed ​​speed decreases naturally。This can reduce the working time of the engine under the condition of lubrication。Not idle failure。

? Because there are many disadvantages when the car is cold，So the engine and computer will increase idle speed，Increasing fuel injection，The water temperature rises as soon as possible。When the water temperature rises slightly，Slowly dropping the idling speed，The state of high idle speed lasted about 1-2 minutes，The lower the water temperature，The longer the duration。

How do you know it is a cold seabet mycar? It has a sensor，called water temperature sensor，Just by it to monitor real -time monitoring，Too low will increase the amount of fuel injection，Too high, report to the police，Display directly on the dashboard，Lighten the water temperature alarm light，Once lit up，Need to park immediately。

? When a cold car，Due to the low temperature in the cylinder，Poor gasoline atomization，To achieve the necessary conditions for combustion，Movement opportunities to increase the concentration of oil and gas mixture，So start a chance to increase idle speed，To increase the amount of fuel injection，Increase the concentration of oil and gas mixed，With the increase in the temperature of the cylinder，No too strong oil and gas mixture，So the idle speed gradually decreases，The amount of engine fuel injection has also gradually decreased，Wait until the engine temperature is completely normal，ECU will maintain an empty -burning ratio，is the best proportion of air and oil completely burning。At this time, the engine enters closed -loop operation，The amount of fuel injection is no longer based on the water temperature sensor，Instead, adjust the amount of fuel injection based on the level of the oxygen sensor in the ternary catalytic，To achieve the best state of complete combustion emissions。