1. The improper mixture ratio of oil and gas is not accurate, which exists in both open-loop and closed-loop control. In a closed-loop controlled car, the minimum operating temperature of the oxygen sensor is 370 ℃. If the car is just starting, the oxygen sensor will not work because the temperature in the exhaust pipe does not reach 370 ℃. At this time, the ECU judges incorrectly, and the control unit has errors in the control of fuel gas mixing and ignition timing, so as to reduce the vehicle's power output and cause jitter.

　　2.氣門和進(jìn)氣口中的氣體積聚如果發(fā)動(dòng)機(jī)的氣門和進(jìn)氣口中積碳，碳可以吸收適量的燃料（就像水流過(guò)河岸，土壤吸收水一樣），  ECU判斷出發(fā)生了錯(cuò)誤。 計(jì)算機(jī)的實(shí)際控制是在假設(shè)有100份油氣的情況下彈出的，但實(shí)際上只有90份（固碳10份）進(jìn)入了氣缸，因此，即使剩余的90份混合的油氣被完全燃燒，也需要 力量無(wú)法實(shí)現(xiàn)。 性和抖動(dòng)是不可避免的。

　　2. Gas accumulation in the valve and air inlet if carbon is accumulated in the valve and air inlet of the engine, the carbon can absorb a proper amount of fuel (like water flowing through the river bank and soil absorbing water). ECU judges that there is an error. The actual control of the computer pops up under the assumption that there are 100 parts of oil and gas, but only 90 parts (10 parts of carbon sequestration) actually enter the cylinder. Therefore, even if the remaining 90 parts of mixed oil and gas are completely burned, it needs force to not be realized. Sex and jitter are inevitable.

　　3.每個(gè)氣缸的工作條件不同同樣，多缸機(jī)的火花塞也存在上述問(wèn)題。 長(zhǎng)時(shí)間使用后，火花塞的點(diǎn)火間隙和時(shí)間控制將有所不同，但是ECU無(wú)法診斷出這種偏差，并且它們?nèi)匀粫?huì)彼此平等地對(duì)待。 這會(huì)導(dǎo)致實(shí)際和理論錯(cuò)誤，并且會(huì)產(chǎn)生一些氣缸。 功率太小會(huì)引起抖動(dòng)。 發(fā)動(dòng)機(jī)長(zhǎng)時(shí)間使用后，每個(gè)氣缸套與活塞之間的間隙也可能看起來(lái)不同或較小，即有些間隙較大，有些間隙較小。 在冷啟動(dòng)時(shí)，沒(méi)有良好的油潤(rùn)滑，并且大間隙氣缸很容易從間隙中泄漏出一定的高溫氣體，從而降低了功率輸出。

　　3. The working conditions of each cylinder are different. Similarly, the spark plug of multi cylinder machine also has the above problems. After long-term use, the spark plug's ignition gap and time control will be different, but the ECU cannot diagnose the deviation, and they will still treat each other equally. This can lead to practical and theoretical errors, as well as some cylinders. Too little power can cause jitter. After the engine is used for a long time, the clearance between each cylinder liner and piston may also look different or smaller, that is, some of the clearance is larger, some of the clearance is smaller. In cold start-up, there is no good oil lubrication, and large clearance cylinder is easy to leak a certain amount of high temperature gas from the clearance, thus reducing the power output.

　　4.水溫傳感器故障。 如果發(fā)燒，但是體溫表的讀數(shù)正常，會(huì)發(fā)生什么？ 水溫傳感器是當(dāng)時(shí)計(jì)算機(jī)判斷發(fā)動(dòng)機(jī)工況的重要依據(jù)之一。 如果引擎的溫度低至10攝氏度，但傳感器“告訴”計(jì)算機(jī)“現(xiàn)在溫度為20攝氏度”，那么計(jì)算機(jī)將以20攝氏度的溫度噴射，油的量當(dāng)然很小， 抖動(dòng)當(dāng)然是自然的。  。

　　4. Water temperature sensor failure. What happens if you have a fever, but the thermometer reads normal? The water temperature sensor is one of the important bases for the computer to judge the engine working condition at that time. If the temperature of the engine is as low as 10 ℃, but the sensor "tells" the computer "the temperature is now 20 ℃", then the computer will spray at a temperature of 20 ℃. Of course, the amount of oil is very small, and the jitter is natural.

　　5.其他因素空氣流量計(jì)臟了，導(dǎo)致進(jìn)氣量減少。  EGR（排氣再循環(huán)）閥處于不良工作狀態(tài)，并在怠速狀態(tài)下引入排氣； 怠速馬達(dá)控制旁通進(jìn)氣口以調(diào)節(jié)進(jìn)氣量。 尺寸過(guò)大，如果電壓低，工作可能就位； 油太差而無(wú)法達(dá)到相應(yīng)的熱值，導(dǎo)致燃燒的功率輸出很小。 當(dāng)冷啟動(dòng)或空空等待時(shí)，上述所有四個(gè)因素都可能導(dǎo)致某個(gè)氣缸的不良燃燒，從而導(dǎo)致發(fā)動(dòng)機(jī)抖動(dòng)。

　　5. The air flow meter is dirty due to other factors, resulting in reduced air intake. EGR (exhaust gas recirculation) valve is in a poor working state, and exhaust gas is introduced in idle state; idle motor controls bypass air inlet to regulate air intake. The size is too large, if the voltage is low, the work may be in place; the oil is too poor to reach the corresponding calorific value, resulting in a small combustion power output. When cold start or empty waiting, all four factors mentioned above may lead to poor combustion of a certain cylinder, resulting in engine jitter.