Experimental study on reducing fuel consumption rate of gasoline engine under the combined action of electric supercharging and EGR

林思聪; 冯浩; 秦博; 李钰怀; 吴坚

doi:10.13949/j.cnki.nrjgc.2021.05.004

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Experimental study on reducing fuel consumption rate of gasoline engine under the combined action of electric supercharging and EGR

更新时间：2026-04-16

- Experimental study on reducing fuel consumption rate of gasoline engine under the combined action of electric supercharging and EGR
- Vol. 42, Issue 5, Pages: 23-28(2021)
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- DOI：10.13949/j.cnki.nrjgc.2021.05.004
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- Published：2021
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林思聪,冯浩,秦博,等.电增压及EGR共同作用下对降低汽油机燃油消耗率的试验研究[J].内燃机工程,2021,42(5):23-28.

林思聪, 冯浩, 秦博, et al. Experimental study on reducing fuel consumption rate of gasoline engine under the combined action of electric supercharging and EGR[J]. 2021, 42(5): 23-28.
林思聪,冯浩,秦博,等.电增压及EGR共同作用下对降低汽油机燃油消耗率的试验研究[J].内燃机工程,2021,42(5):23-28. DOI： 10.13949/j.cnki.nrjgc.2021.05.004.

林思聪, 冯浩, 秦博, et al. Experimental study on reducing fuel consumption rate of gasoline engine under the combined action of electric supercharging and EGR[J]. 2021, 42(5): 23-28. DOI： 10.13949/j.cnki.nrjgc.2021.05.004.

摘要

为降低增压米勒循环发动机燃油消耗率，对一台1.5L增压直喷汽油机进行改制，提高其压缩比与进气滚流，进行了电动增压与废气再循环（Exhaust gas recirculation ，EGR）降低燃油消耗率（Brake Specific Fuel Consumption，BSFC）的对比试验研究。试验结果表明：高压缩比EGR方案能大幅降低发动机燃油消耗率，燃油消耗率下降5%至13.6%，最高有效热效率达到41.2%，这主要得益于传热损失、换气损失的减少和膨胀做功的增加。提高EGR率能减少传热损失与提前燃烧重心，是燃油消耗率降低的主要原因，而提高EGR容忍度的关键是优化燃烧组织以减小点火滞燃期和燃烧持续期。

Abstract

In order to reduce the BSFC of supercharged Miller cycle engine

a 1.5L turbocharged direct injection gasoline engine was modified to improve its compression ratio and intake tumble. A comparative experimental study on reducing BSFC by electric supercharging and exhaust gas recirculation (EGR) was carried out. The experimental results show that the high compression ratio EGR scheme can significantly reduce the BSFC of the engine

the BSFC decreases by 5% to 13.6%

and the maximum effective thermal efficiency reaches 41.2%

which is mainly due to the reduction of heat transfer loss

air exchange loss and the increase of expansion work. Increasing EGR rate can reduce the heat transfer loss and advance the combustion center

which is the main reason for the decrease of BSFC

and the key to improve EGR tolerance is to optimize combustion structure to reduce ignition delay and combustion duration.

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