Methods for operating hybrid vehicles

By introducing an electric motor into hybrid vehicles, the operating point of the internal combustion engine is stabilized, solving the problem of interruptions caused by load changes during the diagnostic process, achieving more efficient and stable on-board diagnostics, and reducing emission risks.

CN112440978BActive Publication Date: 2026-05-26ROBERT BOSCH GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ROBERT BOSCH GMBH
Filing Date
2020-08-28
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In hybrid vehicles, the on-board diagnostic process is susceptible to driver operation and changes in external conditions, leading to diagnostic interruptions or unstable results, especially when the load changes rapidly, which may result in increased emissions.

Method used

By introducing an electric motor into hybrid vehicles to assist or load the internal combustion engine, keeping its operating point constant, the motor can regulate torque to stabilize target parameters of the internal combustion engine, such as load torque, exhaust gas mass flow, and temperature, thus ensuring the stability of diagnostic conditions.

Benefits of technology

This reduces the number of diagnostic interruptions and restarts, improving diagnostic reliability and emission control effectiveness.

✦ Generated by Eureka AI based on patent content.

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Abstract

Method for operating a hybrid vehicle. The present invention relates to a method for operating a hybrid vehicle (100) having an internal combustion engine (110) and an electric motor (120) torque-coupled to the internal combustion engine, wherein diagnostics regarding components (140, 141) can be performed during operation, wherein the internal combustion engine (110) and the electric motor (120) are operated together for a predetermined time period before and / or during the execution of the diagnostics, such that at least one target parameter (T) of the internal combustion engine (110) relevant to the execution of the diagnostics (D) is kept within a predetermined range.
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