据说，当代车主都有一种通病那就是“油耗强迫症”
同样的距离，同样的路况
如果今天的油耗比昨天高出一丢丢
就会在内心给自己发出“破产警告”
（文末有福利，不要错过哦~）
然而有不少心细的老司机都发现
为什么一到冬天汽车的油耗就偏高呢？
其实，冬季油耗增加是一个正常现象
但如果百公里油耗一下子多出了4-5升
那就要好好的从驾驶行为上找找问题了
说不定你就是中了以下的招
热效率下降导致喷油量增加
在冬季行车，由于气温较低，发动机为了保持正常的水温，会把一部分动力“分配”去加热。就好比，以前消耗的1L汽油里可能有0.3L转化成了动力，而在冬季，发动机就会从燃烧的0.3L汽油里拿出一部分给自己“取暖”，以保证正常运转。为了保证动力不减，便会增加喷油量，这就在无形中降低了热效率，从而增加了油耗。
此外，冬季机油黏稠度高，同时发动机机体温度低，导致燃油雾化差，相当一部分燃油未经充分燃烧就排出去了，没有转化为有效功，发动机为保证原有的输出功率，必须增加燃油喷射量。
车内热风导致发动机额外做功
冬天吹热风的要比夏天吹冷风时更耗油，许多车主对此有误解。
其实，发动机水箱的热气确实可以使驾驶室变暖，但如果热气不足的话不能达到设定温度时，发动机就要额外做功来产生更多热能，好供给驾驶室温度要求，这时就要额外耗油。
冷车启动时燃油消耗大
冷车启动时由于冷却水温度低，达不到正常工作时的温度值，发动机便启动加浓系统，增加辅助喷射量，直至温度上升到正常行车温度，这段时间通常会比较费油。
有数据显示，冷车行车的油耗通常是正常油耗的3—4倍，即使冷车行使一公里后，车辆油耗仍为平时油耗的2倍左右。
节温器工作不良
节温器主阀门故障，导致开启过早，则使发动机预热时间延长或发动机温度过低，此时电脑就会根据水温传感器信号增加喷油量，油耗肯定就会增加了。
水温传感器失灵
水温传感器信号失准，传感器提供给ECU的信息总是水温过低，是ECU就会增加怠速阀门的开度、增加喷油量，油耗肯定就增加了。
如何让车内又暖和又省油？
汽车启动后不要马上开暖风
应该在汽车启动后，等3-5分钟，待水温升高后，再开启暖风。
不要开A/C按钮
因为压缩机主要作用是用来制冷，吹冷风。汽车中冷风与暖风是两个系统的，暖风是利用汽车自身的热循环产生的，不需用压缩机工作。
循环方式设置为内循环
将空调的循环方式设置为内循环模式，车内气温会快速升高。感觉车里暖和了之后再切换成外循环，这样有助于车内空气流通。
调节暖风模式
暖风温度调节为23摄氏度最合适。另外调整出风口风向，不要对着面部，容易导致疲劳，影响驾驶安全。把风向调为吹腿和脚部，腿脚暖和了全身也就暖和了。
其实，油耗问题，与平时的驾驶习惯息息相关，在油耗突然升高的情况下，先检查排查自己的问题，再对车辆进行检测。其次，车辆平时的保养也很重要哦~
原创文章，作者：cesifu，如若转载，请注明出处：http://www.cesifu.com/article/70433.html
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