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| Research on E-Boost Technology for Medium-Duty Diesel Engines |
| DOI：10.13949/j.cnki.nrjgc.2022.01.011 |
| Key Words:diesel engine electrification hybrid power E-boost fuel economy |
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| Abstract:Based on a 1D simulation model of engine performance， the influence of the electrical boost（E-boost） system on the engine performance was studied on a medium-duty diesel engine layout of series connection and corresponding hybrid engine， respectively. The influence of different electric compressor layouts on engine performance was studied based on the diesel engine. The result showed that the layout of series connection was better than that of the parallel connection. The layout of series connection of E-boost in front of the turbocharger compressor could increase low-speed torque and air intake by 13% and 44%， respectively， and the brake specific fuel consumption（BSFC） was improved by 12%. The layout of series connection of E-boost behind the turbocharger compressor could increase low-speed torque and air intake by 11% and 37%， respectively， and the BSFC was improved by 11%. Then the influence of electric compressor on corresponding hybrid engine performance was studied. The results showed that under the condition that the power and torque of hybrid engine reached the same goal， the layout of series connection of E-boost behind the turbocharger compressor was better， and the BSFC could be optimized by 11%. The use of the rear arrangement requires an additional intercooler， which would lead to a cost increase. The results show that the E-boost system based on the hybrid engine has the advantage of fast dynamic response and can solve the hysteresis problem of the turbine. Meanwhile， it also can improve the power performance and economy of the vehicle to a greater extent by optimizing and matching the turbocharger and electric supercharging system. |
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