What is the relationship between vehicle speed and efficiency, and what is the relationship between

Efficiency? What does it mean? Is it fuel efficiency?

Economic speed is really about fuel efficiency.

By: Black Hole 007 - Magician Level 4 5-28 19:59 Fast and efficient.

By: Feather DE8 - Probationary Period Level 1 5-29 20:29 From the point of view of ideal physical energetics, it is like this:

p=f*vEveryone knows that the work done by a force is w=f*s, and the power is p=w t, so you can get p=f*s t

Because v=s t

So p=f*v

It is necessary to correctly understand the constraint relationship between f and v in the engine power p=f*v. (1), when the power of the car does not reach the rated power, then p can continue to increase, f and v are not inversely proportional. There are three possibilities:

f pulls up, v increases; f is constant, v also increases; f decreases and v also increases. (2), driving at rated power, traction f pull and v are subject to p=f v inverse proportional constraints, that is, f pull, the car is doing variable acceleration motion. (3) The car must meet two conditions at the same time to reach the maximum speed VM:

p = p forehead, f = 0, the traction force is the smallest, that is, when f pulls = f, the speed reaches the maximum value. At this time, the f pull can not be reduced again, if the speed of the car is to be increased again, only the improvement of the automobile engine to increase the rated power p amount is realized. (4) If the car is to do uniform acceleration linear motion, the actual power of the car is less than the rated power, and the traction force f is constant, so that the car does a uniform acceleration motion under variable power, the speed increases, and the power also increases, until the speed does not increase after the rated power; In this case, the maximum V is only the maximum velocity of the uniform acceleration motion with a certain acceleration A, not VM.

It's like the same speed of 100 kilometers and ran for 1 hour. I only used 5 liters of oil, and you used 6 liters.

I've only heard of speed and fuel consumption, but I've never heard of speed and efficiency.

The car is fast and works efficiently.

Velocity is a vector, there is a size, there is a direction; The velocity is a scalar quantity, only the magnitude has no direction.

The velocity is the speed of the motion of the object, i.e. the velocity is the magnitude of the velocity or the rate of change equivalent to the distance. It is referred to as velocity in junior high school physics, but it should be distinguished from velocity in high school physics.

In order to accurately describe the speed of the motion of an object, take a very short period of time δt, and if δt is very, very small, then it can be assumed that δx δt (displacement ratio time) represents the velocity of the object at time t.

Calculation method: Speed = distance time; Rate = Displacement Time. In physics, velocity is used to express the speed and direction of an object's motion.

1. Velocity vector. Scalar at rate.

Like force and displacement, velocity is a physical quantity that has both direction and magnitude.

If two automobiles move in a straight line and the other move westward in a straight line, if their velocities are the same, their velocities are not the same, because they are not in the same direction.

2. The concept of the same velocity and constant velocity.

The so-called two objects with the same velocity means that the mass of the object has the same velocity and the same direction of motion.

The constant velocity of an object means that the object is always moving in a straight line in one direction, and its velocity remains the same.

Velocity is a vector quantity, which is the ratio of the displacement to the time taken by the displacement, and has direction.

The velocity is a scalar quantity, which is the ratio of the distance to the time taken to travel the distance, without direction.

In chemistry, it is said that a catalyst can change the rate of reaction.

Why not talk about speed?

When you change it, you see the direction, no, so the catalyst can change the reaction rate.

The difference between velocity and velocity is that velocity is a scalar quantity that indicates how fast or slow an object is moving; The velocity is the degree of change in the speed of an object's motion.

The velocity is a vector quantity, which is obtained from the time of bit removal, and the direction is the direction of displacement, but the instantaneous velocity does not consider the direction, only the magnitude, which is a scalar quantity.

The velocity only describes the size, not the direction.

You can easily calculate your approximate speed by using the following simple formula, which is as follows:

The rear axle speed ratio is fixed, generally: Tianlong73（a
.11 (Auman 6, Dou Da J6, Tianlong, Shaanxi Automobile Man Bridge.)8 (Auman 9), and the manufacturer generally sprays on the axle housing.

The gearbox speed ratio is as many gears as there are, such as 12JS160TA:

Generally normal driving, can be hung to the highest gear (12 gear), then the formula IG=R refers to the rolling radius of the tire, there is a national standard, you can search on the Internet, the following provides a few trucks commonly used on the empty let Hui wheel spike tire rolling radius:

Assuming that your car is equipped with tires, then r=.

n represents the engine speed, then with the above formula to calculate, the speed of the vehicle at different speeds is:

1400rpm——

1500rpm——

1700rpm – and so on.

Note: This speed is only considered from the rotation ratio, and does not consider external factors such as load, wind resistance, road slope, etc., and is only a reference value. At the same time, the lower the engine speed, the lower the fuel consumption, so it is recommended to drive in the economic zone (instrument green zone) given by the manufacturer.

The relationship between vehicle speed and speed is that the higher the speed of the car, the faster the speed, and the two are proportional. However, it should be noted that the relationship between the two is not equivalent, because the rubber burial also depends on the gear at that time, and the speed of the gearbox. The following is an extension of the material:

1. Vehicle speed (KMU002FH) = [tire width (mm) x (height and width ratio U002F100) x 2 + hub diameter (hour) final transmission ratio U002F corresponding gear transmission ratio x engine speed (rpm). 2. That is to say, when the speed of the car is 120kmu002fh, the engine speed of some cars is 3000 rpm, and the engine speed of some cars is 2500 rpm, which is a normal phenomenon, because the transmission ratio of each car is different, so the speed and speed are not equal.

The relationship between the number of revolutions of the car and the speed of the vehicle is as follows: 1. Vehicle speed = engine speed x current speed ratio of the gearbox x wheel circumference. The engine speed does not correspond to the vehicle speed, but depends on the gear at the time, that is, the gear ratio.

For example, if the engine speed is 2500 rpm, the corresponding speed of the second gear and the fourth gear is different. The speed is fast, but the speed is fast, but the speed is not necessarily noisy. If it is in neutral position, the speed is zero.

2. The speed of more than 2000 rpm, the engine can really reflect the judgment advantage, and the speed range of 2000 to 4000 rpm is called the healthy speed zone of the engine, that is to say, working in this speed range, the engine can better play its function. 3. The speed is too low, the combustion of the oil in the cylinder is not sufficient, the engine is easy to produce carbon deposits, and the damage to the engine is quite large for a long time; If the speed is too high, the more wear and tear on the engine.

1. Speed: It indicates the speed of the object's movement, which is made of vector pants and has a size and direction. There are two types: instantaneous velocity and average velocity.

The term "velocity" in physics generally refers to instantaneous velocity; The speed of trains and airplanes usually refers to the average speed of Kirichun.

2. Rate: The magnitude of the velocity or the rate of change equivalent to the distance is a scalar quantity, only the size, no direction. The speed at which a chemical reaction proceeds, expressed in terms of rate; **The time it takes for a digital camera used in a meeting to transmit images over a one-second period can also be expressed in terms of rate.

1. The ability of a car to complete the transportation work at the fastest driving speed when fully loaded is called the speed of the car. It is one of the important performance of automobiles, which has a direct impact on the efficiency of automobile transportation. Automobile speed performance is usually measured by the car's flat state and average technical speed.

The higher the average technical speed of the car, the better the speed performance.

2. The determinants of the speed of the car are: the maximum speed of the engine, the speed ratio of the highest gear of the gearbox, the speed ratio of the reducer of the rear axle sail dust mu (if it is rear-wheel drive), the outer diameter of the tire, and other factors that affect the speed, such as the drag coefficient of the shape, whether the radial tire, and the stability of operation. Brother cheats.

3. The engine is the power device of the automobile, which is composed of 2 major mechanisms and 5 major systems: crank connecting rod mechanism, gas distribution mechanism, cooling system, fuel supply system, lubrication system, ignition system, and starting system, but the diesel engine has one less ignition system than the gasoline engine.

4. The transmission is used to realize torque conversion, speed change, neutral gear and reverse gear, expand the working range of the car, and make the car have better power and economy. According to the mode of operation, transmissions are divided into manual transmissions and automatic transmissions.