How to judge the power of a car?

Listen to the sound of the engine to see if there is any abnormal noise, see whether the tire pattern is deep (not deep, indicating a lot of mileage), whether the brakes are weak, whether they deviate, the braking distance can not be too long, and whether the smoke and smell discharged by the muffler are normal.

How to judge·??

If you go up and open it, you will know... There are so many nonsense questions...

Look at the load! A few more people! See what you can run with the highest gear!

Look at power and torque, but also specific power.

Power can determine how fast a car can go; Torque can determine how fast a car can accelerate, but when torque can't increase speed, then power needs to be relied on to increase speed. Therefore, power and torque go hand in hand.

Specific power: Specific power is a comprehensive index to measure the dynamic performance of a car, specifically referring to the ratio of the maximum power of the engine to the total mass of the car. Generally speaking, for the same type of car, the greater the specific power, the better the power of the car.

To make a behemoth like a car run, it takes energy. Theoretically, if it is exactly the same car, the faster it wants to run, the more energy it needs, so the power determines the total energy that an engine can output, and in most cases it can be understood that the maximum power determines its top speed.

The Kodiak is powered by an EA888 TSI380 turbocharged engine with a power of up to 162kW. It accelerates to 100 km/h and reaches a maximum speed of 220km/h.

There is another unit of power, that is, horsepower, his unit is "horsepower" (ps), and the conversion relationship between them is: 1kw=. Some people often talk about how much horsepower, that is, power.

Whether the car is strong or not depends mainly on the engine power of the car, the greater the power, the stronger the power.

The work done by an engine per unit of time is called the power of the engine. The more powerful the engine, the more sufficient the power reserve, and the more powerful it will be. It is mainly reflected in two aspects: acceleration and climbing performance.

In the case of the same displacement, the more power is of course, the better, some car manufacturers use advanced technology, such as intake valve stroke control, EGR, 5 valves, etc., the increase in power is inevitable, but at the same time, this means an increase in engine costs. The engine selected by the manufacturer for a certain model is actually to find a balance between power, economy, emissions and cost, not just more power and higher torque, sometimes for the sake of cost, even at the expense of the engine with more power.

Liter power is one of the main bases, which is the power generated per liter, which is calculated as power displacement.

1. Look at the engine speed: Generally speaking, the engine speed between 2500 and 3000 is a more suitable engine speed. In the case of the same 120 miles, it can be found that some of the more expensive cars may have lower engine speeds.

The engine speed of a car with hundreds of thousands of vehicles is generally around 2800, while the engine speed of a car with 300,000 yuan may drop to about 2400;

2. The engine material is related to quality: the density of aluminum is small, the engine made is naturally light, and the weight of the car equipped with the aluminum engine becomes lighter, which greatly ensures the power efficiency; The aluminum used is very resistant to high temperature and corrosion, and the effect of ventilation and heat dissipation is also better; The physical properties of aluminum itself give good ductility and are more malleable than cast iron, so they are more precise and delicate in the process.

To see whether the power of the car is good, first of all, it is necessary to combine the engine parameters of this model, mainly including the torque of the maximum power engine, the displacement of the engine and other basic parameter information to judge, on the other hand, if it is a new car, you can also take a test drive of the model to feel whether the power of the car meets your own requirements.

0-100 0-400 are all about acceleration, but the real good thing about a car is in the track results!

If you look purely at engine power, there is only one statistic that is engine power.

If you want to see whether the power of a car is good, the key is to see whether its engine and the configuration of his car are good enough, so as to judge whether the power of a car is good.

The main thing is to look at the compression ratio of the car engine, and the compression ratio is larger than the power of the car.

At present, there are many types of engines, and the difference between the same four-stroke is very large, which is judged according to the principle of the entire engine.

At present, the engine is mainly divided into: gasoline and diesel;

As for how to evaluate the quality of power, it depends on which models the engine is used in.

If the car is dominated by horsepower (that is, power), the current so-called power is the best explanation for the power of the car.

There are some large displacement engine power is not necessarily greater than the engine power of small displacement, for example, in terms of displacement, car A is a liter engine with a maximum power of 97 kilowatts, and car B is a liter engine, and the maximum power of the engine may only be 79 kilowatts. Similarly, some cars have the same displacement, the same liter engine, but the power output is different. Hence the result of a metric called "power liters".

The index based on the output of the crankshaft of the engine is called the effective index, which indicates the performance of the entire engine. Effective indicators include effective power, effective torque, liter power, and so on. It is generally believed that the two indicators of power and torque can reflect the advantages and disadvantages of the engine, but in fact, it is not.

It is not that the engine with more power and torque is better, but the real indicator that can reflect the power of the engine is the power emitted per liter of cylinder working volume, that is, "liter power".

Secondly, the various engine types played by car manufacturers, such as CVVT, CVT, VVIT, rotors, single overhead, double overhead, etc., are all explanations for their own power, fuel economy, acceleration and other performance.

Look at the power and torque!

Similar models·· The more power, the more horsepower·· In layman's terms, it is a lot of strength and torque is also a very important data·· Torque is generally said to be acceleration, so similar models ·· In contrast, if the power and torque are both high... The better the motivation, in other words... It's that it can be accelerated instantly·· There's also the strength to run, that's what it means!

Maximum torque, power, maximum horsepower.

1. Listen to the sound quality when the engine starts. In the process of judging the performance by the sound of the engine, some car owners will judge only by the sound size, this practice is inaccurate, this phenomenon can not represent the quality of the car performance, so it is necessary for the owner to pass the sound of the half of the engine through other reference means, after starting the engine, listen to the sound of the engine is not continuous without noise, especially some collision sounds and "sudden" sound, if there are these sounds, it means that the engine has some defects, Its performance is also not perfect.

2. Judge the performance by looking at the amount of water dripping from the exhaust pipe of the car. In principle, the exhaust pipe dripping indicates that the sealing performance of the engine is good, and the fuel is fully combusted, indicating that the performance of the car is not bad, but the exhaust pipe dripping too much is not a good thing, so on the one hand, it will corrode the exhaust pipe, on the other hand, it will also affect the work of the sensor, so it is certain that the exhaust pipe dripping water must be better than not dripping, but it is a problem to grasp the degree without checking and correcting.

3. The performance of the car depends on the speed of high-speed driving. Because when the speed is relatively lost, the engine speed can be controlled by the gear, but if the speed is at 120, you can't change the speed by shifting gears, and this time is the time to test whether the performance of a car is good.

Of course, this is just my personal opinion, after all, a thousand people have a thousand hearts and have not picked up a Hamlet, what do you think?

1 mainly look at the power and torque, while the power and torque of similar models, the greater the power, the greater the horsepower. To put it simply, horsepower is power, but torque is also important. In simple terms, torque is acceleration.

If the power and torque of similar models are higher, the better the power, that is to say, instant acceleration and power can be achieved. 2. The speed is fast or slow to see the maximum torque acceleration (acceleration a): whether the speed is fast or not, mainly depends on the "maximum torque", the greater the maximum torque, the faster the titan balance speed.

Acceleration capacity (time t): is the time to maintain maximum torque. The longer the time, the longer and faster the vehicle acceleration process.

For T engines: The blue line is the torque curve. It can be seen that the engine speed starts at 1500 rpm and outputs maximum torque until 3000 rpm.

That is, when the throttle is given 1500 rpm, your car is already accelerating at full speed and has been going all out. 3. The engine speed determines the torque of the self-priming engine: the maximum torque is output only when the engine speed is above 3000 rpm, and the throttle continues to increase in a flash, and the acceleration ability decreases.

The dynamics of the car are mainly affected by the engine parameters, the transmission ratio of the final reducer, the number of transmissions and the transmission ratio, the streamlining of the car, the quality of the car, the size and form of the tires, and the driving conditions of the car.

The engine parameters are affected by the maximum engine power, the maximum engine torque and the shape of the external characteristic curve of the engine.

The influence of the final reducer ratio. The selection of the drive ratio of the final reducer mainly considers the purpose of the car and the road conditions that are often used by the rough Kakudo.

The influence of the number of gears of the drivetrain. When there is no auxiliary transmission or transfer case, the number of gears of the drivetrain is the number of gears of the transmission forward gears. When the number of transmissions increases, the chances of the engine working near maximum power increase, and the average work of the engine collapses.

The influence of transmission ratios. There is a relationship between the minimum and maximum transmission ratios of the transmission and the proportional ratio of each gear of the transmission.

The impact of the streamlining of the car. The air resistance coefficient of a car has an impact on the dynamics of the car. The streamlining has a significant impact on the dynamics and economy of high-speed vehicles, but it has little impact on the maximum road resistance that the car can overcome.

The impact of car quality. As the total mass of the car increases, the power factor decreases, and the road resistance and acceleration resistance increases. Therefore, for cars with a certain rated load weight, under the premise of ensuring sufficient stiffness and strength, their own weight should be reduced as much as possible to improve the power of the car.

The influence of tire size and form. The driving force, rolling resistance and adhesion of the automobile are affected by the size and form of the tire, so the reasonable selection of tire pattern and form is of great significance to the dynamic performance of the automobile.

The main factors that affect the operating conditions of automobiles are climatic conditions, plateau and mountainous areas, road conditions, etc. Vehicles driving in plateau areas, due to the high altitude, the air is thin, so that the engine inflation and the pressure at the end of the compression in the cylinder decrease, resulting in a decrease in engine power. When the car is driving on bad roads and no roads, the power of the car is greatly reduced due to the decrease in the adhesion coefficient of the road surface and the increase in the rolling resistance of the wheels.

Automobile dynamics refers to the average driving speed that can be achieved when the car is driven in a straight line on a good road surface by the longitudinal external force of the car, also known as the traction of the car, which is one of the most basic and important properties of the car. The evaluation indicators of automobile dynamics include maximum speed, acceleration time, and maximum climbing degree, which are one of the determining factors of automobile transportation efficiency.

An overview of automotive dynamics.

The automobile is a high-efficiency means of transportation, and the efficiency of transportation depends to a large extent on the power of the car. Therefore, power is the most basic and important performance of various properties of the car.

Automotive dynamics indicators.

The dynamics of the car are mainly evaluated by three indicators.

Top speed refers to the maximum speed that a car can travel on a well-leveled road surface.

The acceleration time of the car indicates the acceleration ability of the car, including the acceleration time of starting in place and the acceleration time of overtaking. Acceleration time is the time it takes for a car to start in first or second gear and gradually accelerate from a lower speed to a certain high speed with maximum acceleration intensity (including choosing the right timing of gear shifting). Overtaking acceleration time refers to the time it takes to accelerate to a certain high speed at a certain speed in the highest or sub-high.

Because the car overtaking is parallel to the overtaken vehicle, it is prone to safety accidents, so the overtaking acceleration ability is strong, the parallel driving time is short, the trip is also short, and the driving is safe.

Engine parameters are influenced by the maximum engine power, the maximum engine torque, and the shape of the engine's external characteristic curve.

The influence of the final reducer ratio. The choice of the drive ratio of the final drive mainly takes into account the purpose of the car and the road conditions that are often used.

The influence of the number of gears in the drivetrain. When there is no auxiliary transmission or transfer case, the number of transmissions is the number of transmissions in the forward gears.

The influence of transmission ratios. There is a chaotic attack of the transmission, the minimum transmission ratio and the maximum transmission ratio, as well as the proportion of the transmission ratio of each gear of the transmission.