Firstly, this paper studies and investigates the development status of hybrid electric vehicles, investigates the mainstream configurations of hybrid electric vehicles at home and abroad, analyzes the characteristics of various configurations, and analyzes and combs four control strategies of hybrid electric vehicles.
Then, the concept of mechanical point is introduced, and the three basic power shunt configurations of input power shunt, output power shunt and composite power shunt are compared and analyzed in depth. Then, the structure of CHS hybrid power system composed of two single planetary rows is proposed, and the characteristics and application scope of each mode are studied. According to the configuration of CHS hybrid power, the fuel-saving principle of CHS hybrid power system is expounded from two aspects of steady state and transient state. On this basis, the rule-based control strategy of CHS hybrid power system is proposed.
Finally, the multi-physical joint simulation model of CHS hybrid power system is established by using MATLAB/Simulink and LMS/AMESim. The power and economy of CHS hybrid power system are simulated, which verifies the accuracy of the joint simulation model and the effectiveness of the rule-based control strategy.
The simulation and test results show that the CHS hybrid power system proposed in this paper has good comprehensive performance, and the designed rule-based control strategy is effective and reliable.
It has been more than one hundred years since the first automobile appeared, and the automobile industry has become a pillar industry in many countries. In the United States, Japan, Germany and other developed countries, the automobile industry accounts for more than 10% of its GDP, and the global automobile industry shows a steady growth trend. The development of China's automobile industry has a history of more than 60 years, and the proportion of the total output value of automobile industry in China's GDP has increased year by year. In recent years, China automobile industry has developed rapidly. By March of 20 17, the number of cars in China exceeded 200 million, which made an important contribution to China's economic development. The development of automobile industry not only greatly promotes the development of social economy, but also provides great convenience for our daily life. However, with the development of automobile industry and the increase of users' demand, the environmental and energy problems brought by it are becoming more and more prominent. In order to cope with a series of international problems such as global warming and energy shortage, countries such as Europe, America and Japan strongly support and develop new energy vehicles. In order to improve the international competitiveness of China's automobile industry, China officially implemented the fourth stage standard of passenger car fuel consumption from 20 16 1, and the average fuel consumption of passenger cars decreased year by year. In 2020, it needs to be reduced to 5.0L/ 100km, and the corresponding CO2 emission is 120g/km.
New energy vehicles can effectively reduce fuel consumption and emissions by using clean energy or new powertrain.