Electric vehicle

By performing lubrication and scavenging operations with lubricating oil in electric vehicles when the internal combustion engine is running independently and stopped, combined with mechanical and electric oil pump lubrication, the wear problem caused by speed difference in the starting clutch is solved, improving durability and startability.

CN122107096APending Publication Date: 2026-05-29TOYOTA JIDOSHA KK
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Patent Information

Application Number
CN202511643442.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-11-28
Filing Date
2025-11-11
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In electric vehicles, when the internal combustion engine stops operating independently, the starting clutch suffers reduced wear and durability due to the speed difference, and existing scavenging operation methods have failed to effectively solve this problem.

Method used

When the internal combustion engine requests to stop operating independently, the starting clutch is lubricated with lubricating oil, and scavenging is performed when the speed difference reaches a threshold. Combined with the lubrication treatment of mechanical and electric oil pumps, the wear of the starting clutch is reduced.

Benefits of technology

It effectively suppresses the wear of the starting clutch, improves its durability, and ensures smooth starting and power transmission of the internal combustion engine.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is an electric vehicle capable of suppressing a decrease in durability with respect to wear of a start clutch. A hybrid vehicle as the electric vehicle is equipped with an internal combustion engine, a first motor generator, a start clutch, an automatic transmission, an electric oil pump, and a control device. The control device performs scavenging operation for removing moisture from a combustion chamber of the internal combustion engine when there is a request for stopping independent operation of the internal combustion engine. The control device performs lubrication processing for lubricating the start clutch with lubricating oil when there is a request for stopping independent operation of the internal combustion engine and a condition for performing the scavenging operation is satisfied, and then performs the scavenging operation. The lubrication processing performs supply of the lubricating oil to the start clutch based on the electric oil pump when a difference between rotational speeds of a crankshaft of the internal combustion engine and an input shaft of the automatic transmission becomes equal to or greater than a threshold value in a case where the scavenging operation interrupts the start clutch.
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Citation Information

Patent Citations

  • Hybrid automobile

    JP2018039347A