油门加热系统bypass

Nixiangzenyang

有些车子的油门带有加热系统，就是利用coolant来加热油门。其目的是为了防止严寒地区油门结冰冻住，这个设计在澳洲的绝大多数地方根本用不上。早期的车子这么设计还和冷车怠速控制有关，现在的车子都用电脑控制冷车怠速了。如果好处没有了，剩下的就是坏处了：油门长期在较高的温度下工作容易老化损坏，经过油门的coolant可能会泄露，进气被加热也不好(虽然温度升高不多，但是总归不好)

既然没有啥好处，还不如去掉这个隐患。非常简单，插拔两根管子就好了：

下图红圈内就是被加热的油门，两个绿圈是coolant进出油门的两根管子


连接油门的地方


连接发动机的地方



拔掉管子，吹干油门里面残存的冷却液。



用一根管子连接油门两端的接头，这样里面只有空气了





在发动机一侧，用另外一根管子连接起来，这样coolant就直接循环回去了。



完成后就是这样样子，非常简单。原来油门的温度都在100度左右，bypass后油门时冰凉冰凉的

jcee

油门100 度？这么夸张。。。

Nixiangzenyang

jcee 发表于 2016-8-25 10:34
油门100 度？这么夸张。。。

coolant的温度嘛

Nixiangzenyang

网上有人说bypass完车子性能增加。这个我不太信，不太可能增加6马力

Here, the dyno shows a 6.3 horsepower and 7.1 ft/lbs torque difference between having coolant run through the throttle body and bypassing it, with an average gain of 5.6 horsepower and 6.8 ft/lbs torque. I made the first test after driving the car for approximately 15 minutes. I monitored Coolant Temp and Intake Air Temp while making the run. At the beginning of the baseline run, the coolant was at 178F, intake air was at 80F, and the throttle body itself had a surface temperature of 102F. After bypassing, I again brought the car to temperature and repeated the test. This time, the coolant was at 180F, intake air was 80F and the throttle body was at 82F. To make sure the runs were accurate, I set the cruise on the dyno to 70mph in 6th and let the car run for about 6 minutes. After this time, the throttle body had reached 100F. I let the car cool to 185F coolant temp, and 88F intake air temp. Running the car again with these elevated heat readings yielded another .2 horsepower and -.2 ft/lbs torque compared to before heat soaking the engine. Check out the Dynojet Race Routine between the stock vehicle, the stock throttle body coolant routing and bypassing the throttle body coolant.