Vehicle control method and vehicle control device
The series hybrid vehicle system addresses the challenge of maintaining fuel efficiency and preventing oil dilution by adjusting the internal combustion engine's operating point based on calculated dilution rates, effectively suppressing fuel consumption deterioration.
JP7683219B2Active Publication Date: 2025-05-27NISSAN MOTOR CO LTD
Patent Information
- Application Number
- JP2021004586
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-01-15
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2041-01-15
AI Technical Summary
Technical Problem
Existing internal combustion engine control methods face challenges in maintaining optimal fuel efficiency while preventing oil dilution, leading to potential deterioration in fuel consumption.
Method used
A series hybrid vehicle system that calculates the dilution rate of engine oil by fuel and adjusts the internal combustion engine's operating point to maintain optimal fuel efficiency without exceeding a predetermined torque limit, thereby preventing oil dilution.
Benefits of technology
This approach effectively suppresses the deterioration of fuel consumption even under operation limits for preventing oil dilution, allowing the internal combustion engine to operate at any engine speed and load.
✦ Generated by Eureka AI based on patent content.
Smart Images
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Abstract
To prevent engine oil from being diluted with fuel while curbing degradation of fuel economy.SOLUTION: When a request is made for operating an internal combustion engine 7 at an operation point A with a dilution rate exceeding a predetermined dilution rate, the operation point of the internal combustion engine 7 is maintained without any changes. When a request is made for operating the internal combustion engine 7 at an operation point B positioned on the higher torque side than the operation point A with the dilution rate exceeding the predetermined dilution rate, the operation point of the internal combustion engine 7 is changed so that engine torque of the internal combustion engine 7 does not exceed a predetermined torque limit value. Thus, engine oil can be prevented from being diluted with fuel while curbing degradation of fuel economy.SELECTED DRAWING: Figure 1
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Citation Information
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