The engine is the core component of a car, and it is also the most concerned part of many consumers when buying a car. Every year we will see a variety of top ten engine lists, the most influential one may be 'Ward. The top ten engines', and these lists have become the basis for many consumers to choose a car. In addition to looking at the list, what other aspects to measure the pros and cons of an engine? Today, Cang Ge will talk to you about this topic .
Look at the parameters
The most intuitive way to measure an engine is to look at the parameters of the engine. In general, the maximum horsepower and peak torque of an engine can determine the dynamic performance of the car. But in addition to these two parameters, we have to Look at how much speed the engine can explode at maximum speed, especially for naturally aspirated models, the maximum torque or maximum power is often erupted, and the speed must be at a higher position. Overall The lower the speed required for the maximum torque of the engine, the stronger the actual driving force and the lower the fuel consumption.
For many turbocharged engines on the fly, we also need to pay attention to how much speed the turbine will intervene. In general, the earlier the turbine is involved, the better the driving experience will be.
In addition, we also need to see the 0-100KM measured acceleration performance of this engine model, the general family car is available in about 8S. Also depends on the measured fuel consumption of 100 kilometers, control fuel consumption is an engine The most basic requirements.
Look at materials and forms
The aluminum engine is more advantageous than the cast iron engine because it is lighter in weight and more powerful. The all-aluminum engine also features corrosion resistance, high temperature resistance and fast heat dissipation.
The form of the engine generally determines the grade of the car. Generally speaking, the more the number of cylinders, the higher the engine grade, and the stronger the displacement, the stronger the engine power, but the higher the fuel consumption. The strength of the power does not depend entirely on the displacement and the number of cylinders, but also depends on the tuning of the engine. For example, the horsepower of the 2.0T engine on the Mercedes-Benz A45 can even kill a large number of 3.0L V6 engines.
See technology
Nowadays, major auto manufacturers use various technologies to improve the performance of the engine. For the average consumer, we need to focus on the following two technologies:
Variable timing: This can be said to be the most widely used technology now. The purpose is to adjust the phase of the engine cam under different working conditions, so that the intake and exhaust valves are opened, and the closing time is related to the engine speed. Change and change to improve the efficiency of the charge and increase the engine power.
Direct injection mixed injection: The traditional injection method of injection is to spray oil into the intake port, so that the intake air flow can bring the oil and gas mixture into the cylinder. The direct injection in the cylinder directly injects the gasoline into the cylinder. More precise control of different working conditions, better atomization, higher efficiency, and more fuel-efficient. Hybrid injection can more flexibly control the oil and gas mixture in the combustion chamber, on the one hand, the efficiency of the engine under different working conditions can be considered. It is important to reduce emissions to meet increasingly stringent emissions regulations.
In addition to these two technologies, we should also pay attention to high-pressure common rail, integrated exhaust manifold and other technologies. And we often see Mazda 'Chuangchi Blue Sky Technology' and Honda 'Earth Dream Technology' are actually a lot of engine technology together General term.
Listen to the noise and watch the vibration
The degree of vibration of the engine is an important indicator to measure its performance level. Generally speaking, the smaller the vibration, the better the manufacturing precision and assembly process, the more reliable the use and the longer the life, and vice versa. Poor. When we buy a car, we can put a bottle of water on the engine to observe the vibration of the engine.
There are two ways to listen to the working noise of the engine. One is to listen at idle speed, and the other is to speed up while listening. If there is unevenness or noise, it indicates the engine's intake and exhaust system matching and assembly process. Not particularly good.
Test engine and gearbox matching
The actual test drive is the most important step to measure an engine. We need to experience the clarity of the gearbox and engine matching logic during the test drive. The response of the accelerator pedal is sensitive and linear. The performance of this part depends entirely on the engineer. Domination.
Cylinder brother summary
In fact, judging the pros and cons of an engine, in addition to the above points, we should also look at the reputation of this engine, the most important thing is to see if this engine burns oil, in addition to this should also look at its complaints How is the rate?
