Will a plug-in hybrid vehicle stall at high speed? Friends who drive this type of plug-in hybrid car, don't do it

Xiao Li Che commented on Li Jianhong

2024-06-19 07:04Posted in Gansu Automobile Creator

Some time ago, we launched a topic about plug-in hybrid models, discussing the technical logic and advantages and disadvantages of single-speed plug-in hybrid, multi-speed plug-in hybrid and extended-range electric vehicles. As a result, in the messages and comments in the background, many friends mentioned the problem that single-gear plug-in hybrid high-speed may stall, and we believe that it is necessary to give a relatively simple explanation and "guidance".

First of all, what is the high-speed "high-speed stall" of plug-in hybrid vehicles? The so-called high-speed stall of plug-in hybrid vehicles refers to the obvious power attenuation of some plug-in hybrid models when the power is relatively low and when the vehicle speed is relatively high, and the vehicle speed reaches a value, it can not continue to accelerate, and this speed value is still a certain distance from the maximum speed calibrated by the manufacturer. This stall causes the vehicle to suddenly drop its speed at high speeds and not accelerate to the target value for a short period of time.

What are the main models of "high-speed stall" plug-in hybrid vehicles? We do not mention the specific model, only delineate the range, under normal circumstances, the plug-in hybrid vehicles that can appear "high-speed stall" are some plug-in hybrid models equipped with small displacement engines and single-speed gearboxes.

Why does the "high-speed stall" of plug-in hybrid vehicles occur?

First of all, one of the core reasons for high-speed stall is that the power is not enough! The basic operating logic is: first through the forced pure electric, the power of the vehicle runs to a very low position, and then the vehicle is forced to enter the hybrid mode, after entering the hybrid mode, the speed of the vehicle is still very high, and then at a very high speed, or after running for a while in the state of continuous throttle, the vehicle will "stall".

Why is this happening? You may also see that many of these small-displacement models with high-power motors, power batteries and single-speed gearbox plug-in hybrid models, at medium and low speeds, are basically pure electric driving, or the engine plays the role of a range extender, that is, the engine generates electricity, and the electricity generated is supplied to the motor, and if the power is still left, the electric energy will be supplemented to the power battery.

In the state of high-speed driving, if the power of the power battery is insufficient, which means that the high-power motor cannot drive the vehicle to achieve the target power and speed, then the engine is directly driven to provide power. However, as we all know, we can see even through the parameter table that the above-mentioned types of plug-in hybrid vehicles use small displacement and small power engines, so the power of the engine is often unable to meet the requirements of high power and high speed of the vehicle, which requires the battery to continue to "help" the engine in the case of obvious power loss. Then when the battery can no longer continue to output power, the power of the engine is not enough, and there is no multi-speed gearbox for gear ratio conversion, if you continue to press the accelerator pedal deeply, then the result is that the vehicle "stalls".

So is this situation a defect?

Count, it doesn't count!

This structure of small engine, large motor with single-speed gearbox, for the vast majority of users, can not only meet the acceleration needs of daily driving, but also do a very good job in fuel consumption control, especially most of the use scenarios of most users, in urban areas This is an obvious advantage! The so-called "high-speed stall" is only an extreme case, because few people drive the car at high speed, continue to step on the accelerator deeply in pursuit of high speed.

So what should you do as an owner of this type of model?

First of all, for plug-in hybrid vehicles, don't pursue a very high pure electric range when driving, especially if you know that there is a need for high-speed driving in the future, you must set aside a certain amount of power to help the engine share the power required by the vehicle. Driving any vehicle at the same time without consistently delivering high power at high speeds is dangerous and can also put the vehicle under constant high load.

Therefore, any kind of product has its "weakness", but also has its advantages, for our users, the best state is to use its product advantages, to avoid their own in the "weakness" of the product under the working conditions.

View original image 178K

• 

• 

• 

• 

•