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機油燈報警就是缺機油?-Distinguish the meaning of the flickering oil light

作者:廣州星展汽車配件有限公司 瀏覽: 發表時間:2019-07-12 14:31:10

汽車儀表板中隱藏著各種警示燈,對于普通車主而言,任何一個警示燈點亮,都可能引起一陣恐慌。因為報警就意味著車輛可能存在故障,意味著可能又是一筆開銷。


在這些警示燈中,有一個非常容易識別的,大家稱之為機油燈。機油燈報警意味著什么?可能大部分人都會以為是缺機油了,補加一點機油就能解決問題,然而當你拔下機油尺,卻往往發現機油量是正常的。這是為什么呢?


事實上,機油燈分為兩種,而大部分車主將二者混淆了。一種叫“機油壓力警告燈”,一種叫“機油液位警告燈”(很多車沒有“機油液位警告燈”)。請注意二者外觀的區別:“機油壓力警告燈”通??瓷先ゾ拖褚粋€“阿拉丁神燈”一樣;而“機油液位警告燈”則像是“阿拉丁神燈”漂在水面上。這兩個警示燈所反應的問題截然不同,我們應區別對待。


顧名思義,“機油位警告燈”是警示機油油量不足的。當它報警時,我們就應該檢查一下機油尺,看看是不是缺機油了。


“機油壓力警告燈”則是警示機油壓力問題的,之所以很多人誤認為它是一個機油油量的報警燈,是因為嚴重缺少機油時,也會導致機油壓力不足,所以此時機油壓力警告燈同樣會報警。


除此之外,如果存在以下問題,即便你的機油量充足,也會出現機油壓力不足,造成“機油壓力警告燈”報警。


01

機油黏度過低

機油黏度過低會導致系統密封性下降造成機油壓力不足。造成機油黏度過低的原因我們可以分為內因和外因兩部分。內因就是機油自身問題,比如選擇了與發動機不匹配的機油黏度,或者使用了劣質機油。外因則是因外界因素導致機油黏度下降,如激烈駕駛導致油溫過高(機油黏度會隨溫度升高而下降),冷卻系統故障導致發動機過熱,或者曲軸箱竄氣導致機油被燃油稀釋等。


02

機油泵故障

機油泵出現故障也是造成機油壓力不足的一個主要因素,常見故障為機油泵軸承磨損過大,造成機油泄壓。


03

機油油路或機油濾芯堵塞

機油油路或機油濾芯被油泥堵塞,會導致機油泵泵送的機油量不足,造成機油壓力過低。造成堵塞的原因主要有兩種:一個是車輛超出保養周期過長而未更換機油和機濾,另一個原因則是使用了劣質機油。


04

控制電路問題

如果機油燈的控制電路出現問題,則可能出現“報假警”,也就是機油壓力和液位正常,機油燈卻點亮了。造成這種現象的原因包括:機油壓力傳感器、機油液位傳感器、儀表控制單元以及相關線路故障。


不論是以上何種原因,機油燈報警都是不容忽視的。當行駛中遇到機油燈報警的情況,我們應立即將車停在路邊進行檢查,如果是“機油液位警告燈”報警,通過補加機油通??梢越鉀Q,如果出現“機油壓力警告燈”報警,我們應更加重視,因為機油壓力不足可能導致發動機潤滑不良,造成嚴重問題。因此,“機油壓力警告燈”報警后,不可長途行駛,應將車送至就近修理廠進行檢修。


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The auto dash board carries various warning lights, any flickering of which will lead to the rider’s panic. As normally the flickering warns some possible problem to vehicles resulting in possible expense.


A kind of light named engine oil light is easily differentiated with others on the dash board. What does that mean for the flickering oil light? To most of us, it may mean shortage of oil, and it will be easily solved after recharging some oil to the engine.  When we pull out the oil gauge however, the oil volume in the tank is normal. That’s why?


Actually, there are two kinds of oil lights which are easily confused by drivers. One is called oil pressure warning light and the other is called oil level warning light (lots of vehicles are not fitted with oil level warning light.). Note the difference on their appearance. Oil pressure warning light looks like a Lamp of Aladdin, while the oil level warning light looks like a floating Lamp of Aladdin. We should distinguish the two lights which reflect very different problems.


As it is named, the oil level warning light tells the problem of lacking oil. Therefore when it is flickering, we need to check the oil gauge to see if the engine oil is in shortage.   


Oil pressure warning light tells the problem of oil pressure. The reason why it is mistaken into oil volume warning light in some cases, is that the oil will also be short of pressure at sorely lack of oil, in which situation the oil pressure warning light will be flickering for alarm too.


What’s more, if any case below happens, even if the engine oil is plenty enough, the oil pressure will also be insufficient leading to the alarm of the oil pressure warning light.


01

Oil viscosity is too low

Low engine oil viscosity will reduce the sealability of the system leading to insufficient oil pressure. The reasons for over-low viscosity can be distinguished as external one and internal one.  The internal reason lies in the engine oil itself, such as the oil viscosity selected is not matching with the engine, or the oil in use is in poor quality. The external reason attributes to the exterior factors resulting in oil viscosity decline, for instance, intense driving results in oil’s overheating (the engine oil viscosity decreases with temperature raising.), or cooling system failure leads to engine’s overheating, or blow-by of crankcase cause the engine oil to be diluted by fuel.


02

Oil pump failure

Oil pump failure is one key factor for insufficient oil pressure. The common failure is the over worn to oil pump bearing resulting in oil depressurizing.


03

Oil circuit or filter is blocking

Once the oil circuit or oil filter was blocked by sludge, the oil amount sent from oil pump will be not enough leading to low oil pressure. The blocking mainly happens in two cases: first the vehicle’s maintenance is overdue for long without replacing the oil and filters; second is to use oil in poor quality. 


04

Control circuit’s problem

If there is some problem to the control circuit, it will cause “false alarm” that is, the oil light flickers with normal oil pressure and liquid level.  This is possibly caused by oil pressure sensor, oil liquid level sensor, instrumental control unit and the relative circuit failure.


No matter what reason for the flickering oil light, it should be taken seriously.  If the warning happens on the road, we should stop immediately at roadside to check the reason. For alarm from oil liquid warning light, recharging oil should be a workable solution. If the alarm is from oil pressure warning light, we should be more cautious, as the pressure shortage may lead to poor engine lubrication resulting in serious problems. Therefore, once receiving the alarm of oil pressure warning light, it is prohibited to drive the vehicle for long any more, and the vehicle should be sent to a garage nearby for checking and repairing.  


For more excellent stories about aftermarket, please follow our Wechat public account Remsa Brake.


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