My Years As a Car Dealer

Chapter 0329: Differences in Engine Power

Of course, Zhang Chen knows the difference between the high-power version and the low-power version of the same engine, which can be divided into many situations.

Some are just different ECU programs.

ECU is the engine control unit, which is mainly responsible for the fuel injection amount of each cycle of the engine, the ignition time of the engine, the valve opening time, the pressure of the turbocharger, and so on.

The high and low power versions of the engine, due to the design target power torque and fuel consumption performance, etc., are different, and the matching ECU program must also be different.

If only the ECU program is different, and there is no difference between the internal structure of the engine, the internal hardware, the matching gearbox, etc., it is the simplest. By brushing the on-board computer, low power can magically become high power.

Some are very different, to what extent?

It's so big that it seems to be two different engines, just brushing the ECU, it doesn't have much effect.

In this case, I don't know the real difference between the high and low power versions, but simply and blindly just brush the ECU, which will increase the fuel consumption, and even cause damage to the engine, gearbox, etc., and the cooling system will fail to follow. On, easy to open the pot and so on.

When selling a car, either no car dealer will accept it, or the car dealer will frantically reduce the price, and the loss will be a mess.

?Because in this case, between the high and low power versions of the same engine, such as the cylinder block, cylinder head, etc. are the same, but the piston, connecting rod, valve structure and other components are different.

The model, weight and shape of the pistons between the two versions with high and low power are different, resulting in different compression ratios, and even the overall weight is less than ten kilograms.

The gas distribution structure is different, that is, the low-power version does not pursue sports performance. For better fuel economy, it is equipped with a dual-cycle system. New 81 Chinese website updates the fastest computer: https://

By adjusting the entire air distribution structure, part of the power is sacrificed at low revs in exchange for better fuel consumption performance, but there is no high power.

These differences between the high and low power versions of the same engine will also affect many supporting systems, resulting in different cooling system pipelines, cooling fans, engine motors, turbines, etc., and even the matching gearbox may be different. starter

The low-power version only matches a small and fuel-efficient gearbox, and the high-power version matches a gear that can withstand a lot of power.

For example, Audi's previous 2.0T, the low-power version uses a CVT gearbox. High power is replaced by a wet dual clutch.

Therefore, if the low-power version of the same engine is to be perfectly converted into a high-power version, and the reliability of the engine and other equipment must be guaranteed, it cannot be achieved by simply brushing the ECU. Directly buy high-power and low-power, and can't pass the annual inspection. If you really need power, don't be willing to spend money and buy high-power directly.

After listening to Zhang Chen's answer, Hardan Bartel was stunned and opened his mouth wide, not knowing what to say. He felt that Zhang Chen's explanation was clear and comprehensive, and perfectly explained the question he asked.

"Well, not bad, not bad." Hardan Bartel couldn't stop praising Zhang Chen, but he was afraid that Zhang Chen would only talk on paper and had no actual manipulation experience, so he put forward the last test, "Let's go see a car, as long as we can point out All the common problems of this car, I will not give you any other conditions, I will introduce you to the car dealer immediately."

After speaking, Hardan Bartel raised his head high, and a smile appeared on the corner of his mouth, as if he was very sure that Zhang Chen would not be able to complete the test.

"Okay, let's go take a look." Zhang Chen was also very curious. He didn't know what model Hardan Bartel had, which gave him so much confidence.

Everyone didn't even eat, Zhang Chen and the others immediately followed Hardan Bartel out of the house and towards the back of the village.

In front of a tall room that was clearly a warehouse, before entering the door, I could already hear various noises coming from inside.

Looking at the tightly closed gate and the guard posts roaming nearby, everyone was depressed and curious about what was going on inside, and the precautions were so tight.

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