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Anonymous users2024-02-11The car is an efficient means of transportation, and the efficiency of transportation depends to a large extent on the power of the car. Therefore, power is a very important performance among the various properties of the car. Under the condition of ensuring power, the fuel economy of the car should also be improved as much as possible to reduce the cost of the car.
Therefore, it is indispensable to simulate the dynamics and fuel economy in the design of automobiles. Based on the established model of external engine characteristics and universal characteristics, automobile dynamics model and automobile fuel economy, this paper uses ATLAB language to write the simulation and calculation program of bus dynamics and fuel economy, which provides a simulation calculation platform for the optimal matching of power system in bus product design, which can be applied to the calculation of power and fuel economy of various types of buses, which is conducive to improving the quality and efficiency of enterprise bus product design. The dynamics of a car are mainly evaluated by three indicators, namely the maximum speed, the maximum climbing degree and the acceleration time.
The fuel economy of a car can be evaluated by its fuel consumption of 100 kilometers at a constant speed (l 100 km). The model of external engine characteristics and universal characteristics is an important basis for calculating the dynamic fuel economy of automobiles. When calculating the dynamics of automobiles, it is necessary to fit the [1]M1 mathematical model of vehicle dynamic fuel economy calculation obtained from bench tests Ui Tqamax Maxs and the external characteristic data of the engine into a functional type of engine torque.
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Anonymous users2024-02-10Rattle. Why do so many people ask others directly if they want to program and build models themselves?
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Anonymous users2024-02-09The program of genetic algorithm comes with MATLAB, and its ** model needs to be built by yourself!
I can help you implement the genetic algorithm, but you have to find the model through **!
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Anonymous users2024-02-08The book says that we humans can only know.
About 20 billion years ago.
The universe is a lump.
And then**. Forming the present universe.
No one knew about it a long time ago.
There are a lot of people speculating.
Guess who knows which is true?
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Anonymous users2024-02-07The creation of the universe is still an unsolved mystery, but the most authoritative statement at present is the "universe great" theory. On the first floor, you list a series of theories why? Is it to show that you are an expert in this area?
But why are so many theories that there is no answer that you think is correct? Hehe!
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Anonymous users2024-02-06One theory is that the universe is large, and it is formed by the rapid formation of an atom 10-30 to the power of centimeters. In fact, the real answer is no, these are just hypotheses.
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Anonymous users2024-02-05Anyone who knows doesn't have time to post it.
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Anonymous users2024-02-04It is said that the product of the universe is the product of the great **, but I don't know how it really came about.
There is a misunderstanding in this problem, the diesel engine is not compressed, but ignited. The ignition time of the diesel engine is the injection time of the injector, and the traditional injector uses timing gears and mechanical advancers to control the accurate injection time. The new electronically controlled common rail fuel injection system now uses a computer to control the injector's injection time. >>>More
The compression ratio of modern automobile engines, gasoline engines are generally 8 11 due to the limitation of detonation. There is no knock limit for diesel engines, and the compression ratio is generally 12 22. >>>More
When the engine is working, if the torque it emits is equal to its load, the engine can maintain stable operation at a certain speed. And when the external load changes, the engine speed will change. >>>More
The excess air coefficient is the ratio of the actual amount of air supplied to the amount of air required to theoretically burn 1kg of fuel completely. The upstairs is not correct, and the bigger the coefficient, the better it must be wrong. Theoretically, it is desirable to have complete combustion, that is, an excess air coefficient of 1, but this does not guarantee that it will be completely burned in actual operation, so the amount of air is increased during actual operation to achieve the purpose of complete combustion, and even then it cannot guarantee that the fuel will be burned out. >>>More
Gasoline engine: The oil is sucked out from the fuel tank by the built-in oil pump, filtered to the pulsation reliever, and the smooth fuel is supplied to the fuel supply frame, part of which is sprayed into the cylinder for combustion, and part of it is adjusted according to the vacuum behind the throttle valve The opening of the oil pressure regulator flows back to the fuel tank, so that the fuel maintains a good and stable supply during operation. >>>More