一种混动发动机启停保护方法及系统
By collecting oil pressure, coolant temperature, and running time during cold start and hot shutdown of hybrid vehicles, and setting safety thresholds to limit engine speed, ramp rate, and torque, the problem of friction wear and oil coking caused by frequent engine start-stop is solved, thus improving engine reliability and lifespan.
CN119099580BActive Publication Date: 2026-07-17DONGFENG COMML VEHICLE CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGFENG COMML VEHICLE CO LTD
- Filing Date
- 2024-09-30
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In hybrid vehicles, frequent engine start-stop cycles can lead to reliability issues, including abnormal wear of engine friction pairs and oil coking, which can affect engine life.
Method used
By collecting data on oil pressure, coolant temperature, and running time during cold start-up and hot shutdown, and setting corresponding safety thresholds, parameters such as engine speed, creep rate, and torque are limited to prevent abnormal wear and oil coking.
Benefits of technology
It protects the engine friction pairs from abnormal wear, extends engine life, and provides simple and efficient start-stop protection.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN119099580B_ABST
Abstract
一种混动发动机启停保护方法及系统，属于混动发动机的启停控制领域，包括在冷机启动工况下，采集发动机的机油压力、冷却液温度、以及第一运行时间，判断三者是否均小于各自的冷机启动安全阈值，若是，则将发动机拖动转速和发动机转速爬升速率限定在各自的冷机启动安全限值以下；若否，则不限定；在热机停机工况下，采集发动机的负荷率和第二运行时间，判断两者是否均大于各自的热机停机安全阈值，若是，则将发动机扭矩限定在热机停机安全限值以下，直至负荷率小于对应的热机停机安全阈值且第二运行时间大于对应的热机停机安全阈值，控制发动机停机；若否，控制发动机停机。本发明能够解决发动机冷机起动和热机停机的可靠性问题。
Need to check novelty before this filing date? Find Prior Art