Introduction:
the past two years the development of China-made cars in full swing, Geely, Chery, Great Wall and other independent brands, such as in the highly competitive automotive market blaze a trail, and achieved good results.
a lot of people have to take off the blinkers begin to address the development of China-made cars. But it has two sides, sales by leaps and bounds, while fuel consumption has complained constantly.
is what caused the high fuel consumption of domestic cars, today let us go to delve into the reasons.
more standard
First, before the comparison to correct a lot of people a misconception that different levels, different types, different power-driven vehicles were compared.
For example, the Honda Fit small car that relatively compact SUV Hover H6 is obviously relatively meaningless.
Similarly Corolla take hybrid fuel vehicles Dorsett same contrast ratio of not herself. So only at the same level, the same type of independent brands and joint venture brands, compared to a better understanding of the domestic car where the difference in the end.
is a whole car, fuel consumption great cause of several aspects of the various components to each other only with the tacit understanding harmonious, especially the engine and gearbox The pair’s performance, the impact on vehicle fuel consumption is very large.
We explore what the engine, gearbox, vehicle weight three aspects.
engine
First of all vital role in the core and the source of vehicle power, as the engine.
want fuel-efficient engines, the thermal efficiency of the engine, gearbox transmission efficiency, body weight, aerodynamic design a perfect match in every aspect. The gap between domestic cars in terms of design is quite clear to injection technology and engine valve control, for example.
Most own-brand engine still at the stage of a multi-point fuel injection, while the car engine joint use of direct injection technology has been widely used.
For example, Honda dream earth engine, which uses a straight cylinder isSpray, variable intake technology, high compression ratio and weight of the cylinder or the like.
Variable Valve technology is the biggest advantage of the different operating conditions, to adjust the output performance of the engine. Like human breathing, when you need power, big mouth breathing, when you smooth ride, and breathing becomes smooth, save fuel. In this respect its own brand and technology did not scream on the name of this area is mainly monopolized by joint venture companies. At present vehicles European, Japanese, Korean series has achieved almost 100 percent coverage.
At present, only a small number of independent brands such as Chery independently developed direct injection engine, while most of the domestic brands directly ism, using imported Mitsubishi engine , of course, previous generations of foreign products, performance naturally can not be compared with the joint venture brands.
transmission
Then the engine, gearbox talk, gearbox and engine matching also affect a car’s fuel consumption.
In the field of transmission, domestic brands and joint venture brands gap larger than the engine. Transmission constraints can be said to be the largest domestic brand short board.
has a lot of foreign brands are simply rely on the gearbox, such as Aisin gearbox, when too many people order, we will fall into the brand’s production delay. This is why a lot of use of the Aisin transmission models will experience limited current car embarrassment.
Of course, domestic brands have also developed gearbox, especially dual-clutch gearbox, Logically, dual-clutch transmission efficiency should be higher, but due to the limited capacity of the tune, on the transmission efficiency is still unable to reach a joint venture height of the brand can be said to be the biggest test of tuning work repairer heritage, in this regard made cars still have a long way to go.
Body weight
The third point is the vehicle weight, in fact it is very simple and very intuitive, as long as the car body enough light, relatively speaking, the more the drive easy, relatively more fuel-efficient.
In this regard, Japanese cars are doing the best. For example autonomic cars drive version of Harvard H6 two heavy 1675kg, while the two-drive version of the Toyota RAV4 heavy 1540kg, the same level models of Japanese cars lighter by nearly more than 100 kg.
According to the authoritative data analysis, a percentage of vehicle weight reduction per fuel consumption fell by 0.7 percentage.
It is not a light weight on it to cut corners? Before many fans have such concerns, in fact, on the contrary, lightweight definitely not give you another lighter door impact beams minus simple operation and so on.
In the premise of ensuring safety, lightweight vehicles has been the trend, in this regard, the Japanese car has been at the forefront of research and development, there is involved want to buy more robust but lightweight materials, vehicle design and other areas, in this regard made cars still long way to go.
Conclusion:
A lot of people buy a car will be an important factor in the fuel consumption as a reference, this view is not without justification. But we should also compare the configuration when buying a car, safety, driving experience and other comprehensive data, in this respect the progress made cars for all to see. So certainly progress made cars, but also found that there is still a long way to go.