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Effect of Over-Expansion Cycle Engine Valve Phase Deviation on Air Charge Model Accuracy
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Wentao Zhang, Pengpeng Feng, Wei Hao, Ningning Xu, Tianpeng Zhou, Tao Yan
Automotive Digest | 2025, (1) : 29 - 35
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Automotive Digest | 2025, (1): 29-35
Effect of Over-Expansion Cycle Engine Valve Phase Deviation on Air Charge Model Accuracy
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Wentao Zhang, Pengpeng Feng, Wei Hao, Ningning Xu, Tianpeng Zhou, Tao Yan
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  • General Research and Development Institute, China FAW Corporation Limited, Changchun 130013
Published: 2025-01-05 doi: 10.19822/j.cnki.1671-6329.20230300
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In order to improve the accuracy of the over-expansion cycle engine air charge model, improve engine performance and improve the dynamic condition mixture control of the vehicle, it is necessary to accurately control the phase of the engine’s intake valve. In this paper, the influence of the Intake Valve Open(IVO) timing and Intake Valve Close(IVC) timing on air charge model is analyzed, the influence of valve phase deviation on the accuracy of the air charge model is analyzed theoretically, and the influence of different valve phase deviations on the accuracy of the air charge model is verified by experiments, in order to meet the accuracy requirements of the air charge model deviation of no more than ±5%, the intake valve phase deviation needs to be controlled within the range of ±1.5 °CA. The influence of the intake phase deviation on the air charge model is corrected by controlling the phase accuracy of the assembly machinery and adding the Electronic Control Unit(ECU) phase deviation adaptive model, and the effect of phase deviation control is verified by experiments.

Over-Expansion cycle  /  Phase deviation  /  Model accuracy  /  Phase correction
Wentao Zhang, Pengpeng Feng, Wei Hao, Ningning Xu, Tianpeng Zhou, Tao Yan. Effect of Over-Expansion Cycle Engine Valve Phase Deviation on Air Charge Model Accuracy[J]. Automotive Digest, 2025 , (1) : 29 -35 . DOI: 10.19822/j.cnki.1671-6329.20230300
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doi: 10.19822/j.cnki.1671-6329.20230300
  • Online Date：2025-11-12
  • Published：2025-01-05
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    General Research and Development Institute, China FAW Corporation Limited, Changchun 130013
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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