Engine oil pressure control method for an engine with an EGR system and engine
By optimizing the number of linear interpolation elements N1, N2, N3, and N4, and considering engine operating conditions and fuel quality, the problem of deteriorating engine combustion stability under the EGR system was solved, achieving reasonable control of the engine's target oil pressure and improving power and fuel economy.
CN117432547BActive Publication Date: 2026-06-26DONGFENG MOTOR GRP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGFENG MOTOR GRP
- Filing Date
- 2023-11-22
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
With the introduction of EGR systems, existing technologies have further deteriorated engine combustion stability, leading to unreasonable control of engine target oil pressure and affecting power and fuel economy.
Method used
By adjusting the number of linear interpolation elements N1, N2, N3, and N4, and taking into account factors such as the actual engine operating conditions, oil octane rating, and coolant temperature, the engine oil pressure control method is optimized. Interpolation is performed using a larger or smaller engine load to ensure the rationality and stability of the target oil pressure.
Benefits of technology
It enables rapid response to target engine oil pressure, improving engine protection, power, fuel economy, and combustion stability.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117432547B_ABST
Abstract
The application discloses an engine oil pressure control method and an engine with an EGR system. The method includes the following four conditions: (1) determining the first linear interpolation number according to the ratio of the actual engine firing path torque to the requested firing path torque, the ratio of the difference between the original target oil pressure and the actual oil pressure to the original target oil pressure; (2) determining the second linear interpolation number according to the ratio of the difference between the target coolant temperature and the actual coolant temperature to the target coolant temperature, the ratio of the net torque at the engine flywheel end to the total torque at the engine flywheel end; (3) determining the third linear interpolation number according to the octane number coefficient of the oil product and the engine back angle intensity coefficient; (4) determining the fourth linear interpolation number according to the engine fuel injection frequency CNT, the ratio of the difference between the original target oil pressure and the actual oil pressure to the original target oil pressure; only one of the above four conditions is executed in each control cycle. The application can optimize the target oil pressure control of the engine with the EGR system.
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