Development of a PHEV Hybrid Transmission for Low-End MPVs Based on AMT

Abstract

In order to improve the fuel economy of vehicles, based on the automated mechanical transmission (AMT), a plug-in hybrid electric vehicle (PHEV) hybrid transmission for low-end multi-purpose vehicles (MPVs) is developed. To obtain the statistics of the best-selling models, we took several best-selling models in the Chinese market as the research object to study the relationship between power demand, energy demand, weight, and cost. The power requirements and energy requirements of PHEVs are decoupled. According to the decoupled theory, a single-motor parallel scheme based on the AMT is adopted to develop a PHEV hybrid transmission. In the distribution of engine and motor power, the engine just needs to meet the vehicle’s constant driving power, and the backup power can be provided by the motor, which means we can use an engine with a smaller power rating. The energy of short-distance travel is mainly provided by the motor, which can make full use of the battery, reducing the fuel consumption. The energy of long-distance travel is mainly provided by the engine, which can reduce the need for battery capacity. The working modes of the electrified mechanical transmission (EMT) are proposed, using P3 as the basic working mode and setting the P2 mode at the same time, and the gear ratios are designed. Based on the above basic scheme, two rounds of prototype development and assembling prototype vehicles for testing are carried out for the front-engine-front-drive (FF) layout. The test results show that the vehicle’s economy has been improved compared to the unmodified vehicle, and the fuel-saving rate of 100 kilometers has been achieved at 35.18%. The prototype development and the vehicle matching verify the effectiveness of the new configuration based on AMT.

Legendre-wavelet embedded NeuroFuzzy feedback linearization based control scheme for PHEVs charging station in a microgrid

“…Today's society is facing a shortage of energy and mainly depends on fossil fuels to fulfill energy demand. Increasing cost, high carbon emission rate, pollution issues, global warming and limitation of supplies are some critical problems related to the use of fossil fuels to produce energy [1][2][3][4][5][6]. These challenges can be contained by sustainable consumption, efficient transformation of energy from one kind to another, and focusing on new cost-effective, clean, and green non-conventional renewable energy resources (RES) instead of conventional nonrenewable energy resources [1,7,8].…”

Special Issue on Future Powertrain Technologies

“…They open up space for diverse research, which is distributed over the entire vehicle design process. Recent research on this topic incorporates results for selecting and designing the powertrain topology [1][2][3][4][5][6][7] with their vehicle operating strategy [8,9], as well as results for handling the reliability of new powertrain components [10][11][12].…”

“…However, an increased powertrain complexity also increases the cost. In [2], a low-end multipurpose vehicle is proposed. Here, the combustion engine is designed only to meet the constant driving power requirements.…”