In the past few years, there has been a lot of talk about plug-in hybrid cars and extended-range cars as pseudo-new energy vehicles, especially extended-range cars, which are considered by many people to be backward technology, which is completely "taking off their pants and farting".
But the fact is that the ideal car that adheres to the extended-range power has now achieved stable monthly sales of more than 40,000 units, which is the sales champion of the high-end new energy vehicle market, which makes BBA extremely popular. Similarly, plug-in hybrid vehicles have become the first choice for many people, and plug-in hybrids and range extenders will be the mainstream of the passenger car market for a long time to come.
It can be found that whether it is a range-extended car or a plug-in hybrid car, the engine on which it is equipped is a gasoline engine, and everyone seems to ignore the diesel engine, why is that?
Diesel engines have obvious advantages and are more suitable for range extenders than gasoline engines
When it comes to diesel engines, the first thing that comes to most people's minds is in the commercial vehicle market, and there are very few models equipped with diesel engines in the passenger car market, except for some pickup trucks. In fact, this is because diesel engines have empty endurance and no explosive power, so they are commonly used in commercial vehicles.
In the new energy era, is the diesel engine suitable for carrying on the extended-range car?Theoretically, a diesel engine is more suitable as a range extender than a gasoline engine.
Compared with gasoline engines, diesel engines inherently have higher thermal efficiency, and thermal efficiency determines the fuel consumption required for range extender power generation, because the range extender car engine does not directly drive the wheels, so that the shortcomings of the diesel engine's lack of explosive power have become insignificant.
In terms of car cost, the domestic No. 0 diesel ** should also be lower than No. 92 gasoline and No. 95 gasoline. At the same time, the power generation efficiency of gasoline engines is generally 33 kWh, the power generation capacity of the diesel engine is 20%-30% higher, if the diesel engine is installed on the range extender car, not only can effectively reduce fuel consumption, but also will not sacrifice the car experience, than the gasoline engine as a range extender is more attractive.
Insufficient technology + consumption concept determines that diesel engines cannot be installed in large quantities
While diesel engines have obvious advantages over gasoline engines, there are still significant difficulties behind using diesel engines as range extenders.
First of all, technical limitations, in the domestic passenger car market, gasoline engines have dominated for more than 20 years, in these more than 20 years, almost all car companies have put their energy into the research and development of gasoline engines, resulting in the diesel engine suitable for passenger cars is not technically mature, and the diesel engine on the truck can not be directly moved to the family car.
If you want to use the diesel engine as a range extender, you have to spend a lot of time and energy on research and development, which is much more expensive than the existing range extender. Taking 10,000 steps back, diesel engines can really be used directly as range extenders, which have long been popularized in mass production, and the car companies themselves are aware of the economic accounts behind them. What's more, the shortcomings of high manufacturing cost and short life of diesel engines cannot be solved in a short period of time, and it is not easy to create a reliable, stable and excellent diesel engine.
Finally, the first impression of the vast majority of people in China on diesel vehicles is that they exist in trucks or trucks with high pollution, noise and no driving experience, and it is difficult for family cars to be equipped with diesel engines in a short period of time.
Write at the end:
To sum up, whether it is for car companies or users, there is no need to use diesel engines in extended-range vehicles, and extended-range vehicles already have a good pure electric range, and only oil will be used during long-distance driving, so the fuel economy of diesel engines will not be much higher than gasoline engines. What's more, it is only a matter of time before pure electric vehicles completely replace fuel vehicles, and extended-range vehicles only play a transitional role.