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　　Fault analysis of low working temperature of cement mixer engine?

　　在水泥攪拌車行駛中，若冷卻液溫度表長(zhǎng)時(shí)是指示在發(fā)動(dòng)機(jī)正常工作溫度以下，即可判定為發(fā)動(dòng)機(jī)工作溫度過(guò)低。

　　When the cement mixer is running, if the coolant temperature gauge indicates that it is below the normal operating temperature of the engine for a long time, it can be judged that the engine operating temperature is too low.

　　對(duì)一定的發(fā)動(dòng)機(jī)而言，不可能因發(fā)生故障而導(dǎo)致冷卻強(qiáng)度增大或傳熱損失減少，從而使發(fā)動(dòng)機(jī)工作溫度過(guò)低，發(fā)動(dòng)機(jī)工作溫度過(guò)低，通常是自然因素或冷卻系統(tǒng)的冷卻強(qiáng)度調(diào)節(jié)裝置失效所致，為此，發(fā)動(dòng)機(jī)出現(xiàn)工作溫度過(guò)低的現(xiàn)像時(shí)，應(yīng)進(jìn)行以下檢查。

　　For a certain engine, it is impossible to increase the cooling intensity or reduce the heat transfer loss due to the failure of the engine, so that the working temperature of the engine is too low, which is usually caused by natural factors or the failure of the cooling intensity regulating device of the cooling system. For this reason, when the working temperature of the engine is too low, the following inspection should be carried out.

　　1.環(huán)璄溫度較低時(shí)，檢查百葉窗是否關(guān)閉，是否采取了有效的保溫措施。

　　1. When the ambient temperature is low, check whether the shutter is closed and whether effective insulation measures are taken.
            

　　2，檢查風(fēng)扇控制裝置是否失效，如果冷卻系統(tǒng)裝有風(fēng)扇離合器或裝用電動(dòng)風(fēng)扇，可在發(fā)動(dòng)機(jī)工作溫度較低時(shí)，通過(guò)觀察風(fēng)扇的運(yùn)轉(zhuǎn)狀態(tài)來(lái)確定風(fēng)扇控制裝置是不否失效。

　　2. Check whether the fan control device fails. If the cooling system is equipped with a fan clutch or an electric fan, the fan control device can be determined whether the fan control device is invalid by observing the running state of the fan when the engine operating temperature is low.

　　3，檢查節(jié)溫器是否正常，在發(fā)動(dòng)機(jī)工作溫度較低時(shí)，通過(guò)觸試散熱器溫度來(lái)判斷冷卻液是否進(jìn)行大循環(huán)，以診斷節(jié)溫器是否正常。

　　3. Check whether the thermostat is normal. When the engine working temperature is low, judge whether the coolant is circulating by touching the radiator temperature to diagnose whether the thermostat is normal.

　　4，如果冷卻液溫度表指示溫度低，但發(fā)動(dòng)機(jī)工作中無(wú)其他異?，F(xiàn)象，應(yīng)對(duì)冷卻液溫茺和冷卻液溫度傳感器進(jìn)行檢查。

　　4. If the coolant temperature gauge indicates low temperature, but there is no other abnormal phenomenon during engine operation, check the coolant temperature and coolant temperature sensor.