最初由 dindindang 发布
我97年的CIVIC前几天十多升油才跑了100公里,车在冬季是不是很耗油?
还是我车有问题?? 请教各大虾!!!
your onboard computer works like this:
Case:
on winter days, starting engine
Sensor:
Coolant temperature = -n degrees (abnormal operating temperature)
Oxygen supply = good
block temperature = -n degrees
Computer reaction:
Close throttle
allow very high fuel-air ratio (for easier ignition due to low air and block temperature)
这就是为什么冬天废气闻起来都是汽油味儿。燃烧不充分
所以引擎的efficiency大大的降低了 (如果我没记错的话, 内燃引擎的max efficiency是40%, 所以冬天更低)
不过呵呵你会发现,车热了之后冬天会更省油的,为什么?
因为零下n度的空气density比30度的空气density高,起了turbo车的intercooler的作用,所以engine compression ratio is slightly higher, resulting in more HP output... & 燃烧更充分
hence: 冬天跑长途省油
不好意思这辆天正编程,脑子是在if ... then的状态:smokin: