When it comes to the winter cold protection of the CVT transmission, the first thing that comes to mind is the Nissan car, and it is believed that only the CVT transmission of the Nissan car has cold protection, and other brands of models do not. In fact, this is not the case, the automatic transmission of various brand models has winter cold protection, but the degree of protection is different.
My own Toyota Asiatic Lion Deluxe Edition is equipped with a 2.0 naturally aspirated engine, matching Toyota's D-shift CVT gearbox with starting gears, and also has more serious cold protection. During this time, the temperature here in the morning is about minus ten degrees, and when the cold car starts in the morning, it cannot be refueled at all, and the fastest speed is 40 km / h. And also limit the engine output power, even if the throttle is very fierce, the engine gearbox whistles, the speed does not exceed two thousand revolutions, and the power bar on the dashboard shows that it can only reach half at most. Only after driving two or three kilometers, the engine water temperature rises a little, the cold protection will be reduced, but will not be completely lifted; about five kilometers or so, the engine water temperature reaches the normal value, the cold protection will be completely lifted, after which normal driving.
Not only the CVT gearbox, but also the AT gearbox also has cold protection. My colleague drives a car that is 6AT, and he said that the car can't run up these mornings, the engine speed can't go up, the gearbox doesn't upgrade, and only when the engine temperature rises a little, it will return to normal. As for other brands of CVT gearboxes and AT gearboxes, they basically have the same problem, but the severity is different. But the dual-clutch transmission has never heard of cold protection, and it can run normally from the start.
The main purpose of the car is to prevent the engine and gearbox from running at high loads when the temperature is too low. As we all know, the most serious engine wear is the moment when the cold car starts, if the cold car starts immediately after the high load, the amount of engine wear will surge, and there is a possibility of pulling the cylinder, so in the cold car to limit the engine speed and load.
CVT gearbox to rely on hydraulic pressure to clamp the steel belt, if the transmission oil temperature is too low, the viscosity is larger, will lead to a decrease in control accuracy, cone wheel can not normally clamp the steel belt, steel with the risk of slipping; AT transmission cold car also has the problem of large control of transmission oil viscosity is not precise, the switching of gears, the compression of friction plates will have a certain impact, so the car set cold protection program is very necessary.
It's just that this kind of cold protection has caused certain trouble to our car, if there is an emergency to go out in the morning, the car is dry and refueling and does not walk the aisle, it is really anxious! The lowest temperature we had here a few days ago was nearly minus twenty degrees, and that morning I was driving back to my hometown, and on the road with a speed limit of eighty kilometers per hour, I could only drive forty, and I felt that everyone who exceeded me threw contemptuous and resentful glances at me, which was really ashamed! On the Internet, some people say that after the engine water temperature rises slightly, the engine is turned off and restarted, the cold protection is lifted, I don't know if it is good or not, which day to find an opportunity to try it.