When it comes to the "heart" of a car, there is no doubt that it is the engine. Engine performance is undoubtedly our most important part. Then, how much do you know about the "careful thinking" in the car? Then we take the Ruijiete 2.7L engine equipped with Jianghuai Shuai to take the "heart" of Ta.

Ruijiete 2.7CTI engine parameters Ruijiete 2.7CTI engine parameters

Engine displacement

Engine displacement refers to the sum of the working volumes of each cylinder of the engine. It is determined by the cylinder diameter, stroke and number of cylinders. The engine displacement basically determines the engine's power performance. If the engine is configured in the same way, in general, the engine row The greater the amount, the stronger the dynamic performance.

Engine displacement calculation method Engine displacement calculation method

2. Cylinder valve

The cylinder is commonly referred to as the engine combustion chamber, and the common cylinder number is 3 cylinders, 4 cylinders, 6 cylinders, and the like. In general, the more the number of engine cylinders, the larger the displacement and the greater the power. The function of the valve is to input fuel and exhaust gas to the engine cylinder. The conventional engine has only one intake valve and one exhaust valve per cylinder, that is, the single-cylinder two-valve. This engine technology is relatively backward, the engine power is relatively low, and the high speed is high. When the charging efficiency is low and the power performance is weak, the more advanced engine generally uses two intake valves and two exhaust valves, that is, a single-cylinder four-valve, which has high engine intake and exhaust efficiency, and the engine is driven at high speed. The power is higher. The Ruijie 2.7CTI engine is a single-cylinder four-valve engine.

Single cylinder four-valve engine Single cylinder four-valve engine

3. Cylinder stroke

The bore diameter refers to the diameter of the inner wall of the cylinder. The stroke is also the stroke we refer to. It refers to the distance from the top dead center to the bottom dead center of the piston movement.

Bore diameter* stroke Bore diameter* stroke

In the case of a certain engine displacement, the engine can have two design ideas: large stroke and small stroke and small bore and large stroke. A small stroke means that the stroke of the piston is relatively small, which means that the piston is more likely to reciprocate more times per unit time, which means that it is easier to reach a relatively high speed. The large stroke means that the piston stroke is relatively large, which means that the piston has a longer acceleration distance, which means that it is easier to output a relatively high torque. In addition, the small stroke determines that the engine block height will be relatively small, so the center of gravity is lower; conversely, the large stroke determines that the engine center of gravity will be higher.

4. Compression ratio

The engine compression ratio refers to the degree to which the engine mixture is compressed. It is expressed as the ratio of the total cylinder volume before compression to the cylinder volume after compression. It is an important technical parameter of the engine and has a great influence on the engine output power and torque. Under the premise of ensuring the stability of the engine, the higher the compression ratio, the higher the thermal efficiency of the engine, and the better the power performance and fuel economy.

Compression ratio Compression ratio

5. Rated power / speed, horsepower

The rated power of the engine generally refers to the maximum power of the engine, indicating the speed of the engine work. The higher the engine power, the faster the vehicle travels, and the higher the maximum speed. The rated power/speed means that the engine can reach the rated speed. The speed corresponding to the power and rated power is generally the maximum speed at which the engine works. Horsepower is another term for engine power, consistent with the meaning of engine power, which is approximately 1.36 times the engine power. The Ruijie 2.7CTI engine is a small displacement high power engine.

The Ruijie 2.7CTI engine is a small displacement high power engine The Ruijie 2.7CTI engine is a small displacement high power engine

6. Maximum torque / speed (N · m / rpm)

Engine torque is actually a specific indicator of engine acceleration. The higher the engine torque, the better the engine acceleration performance and the higher the climbing ability. The maximum torque/speed refers to the maximum engine torque achieved at the corresponding speed. The ideal state of the engine is to reach the maximum torque in the full speed range. Obviously this is impossible. Therefore, the wider the range of the engine's maximum torque, the stronger the engine's acceleration performance and the higher the speed. Good acceleration performance. Generally speaking, the engine power determines whether the vehicle runs fast or not, and the engine torque determines whether the vehicle can not be pulled when it is overloaded. The maximum torque of the Ruijiete 2.7CTI engine reaches 360N·m, which is the highest level in the same displacement engine, and the highest torque corresponds to a wide range of speeds, which basically achieves the level of “want to accelerate”.

The maximum torque of the Ruijie 2.7CTI engine reaches 360N·m The maximum torque of the Ruijie 2.7CTI engine reaches 360N·m

I believe that after reading this article, the card friends will have a deeper understanding and understanding of the basic parameters of the engine. The JAC Ruijiete 2.7L engine incorporates the latest diesel engine technology and has obtained 19 international invention patents. The parts in the engine are all from internationally renowned brands. The product quality meets the world standard, the service life is longer, and the small displacement is high horsepower. More powerful, more economical and fuel-efficient, welcome all card friends to go to the local 4S shop tasting.

Reading volume: Source: JAC handsome bell Author: Zebian

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