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Limp control method and system for hybrid vehicle

A control method and vehicle driving technology, which is applied to hybrid vehicles, motor vehicles, control devices, etc., can solve the problems that the safety of vehicles and occupants is not too high, and differentiate treatment, so as to avoid vehicle breakdown and ensure safety.

Pending Publication Date: 2020-10-16
吉泰车辆技术(苏州)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, after the failure of the power battery power supply, most of the drivers need to enter the limp mode by power off and restarting, and no distinction is made for different situations. This is not the optimal limp control method, which is harmful to the safety of the vehicle and passengers. Not too high a guarantee

Method used

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  • Limp control method and system for hybrid vehicle
  • Limp control method and system for hybrid vehicle

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0027] Please see first figure 1 As shown, a limp control system for a hybrid vehicle applied by a limp control method for a hybrid vehicle of the present invention includes a power battery 10, a storage battery 20, an engine 30, a DCDC bidirectional converter 40, an ISG motor 50, and a drive Motor 60, clutch 70, main control unit 80 and other sub-modules. The main control unit 80 and other sub-modules control each sub-module through the ...

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Abstract

The invention provides a limp control method and a system for a hybrid vehicle, and the method comprises the following steps: judging whether a power battery of the vehicle has a power supply fault ornot, and entering a limp mode if the power battery has the power supply fault; ensuring that an engine of the vehicle is in a running state; judging whether anISG motor or adriving motor breaks downor not, and adopting different control modes based on the judging result, wherein if the ISG motor and the driving motor have no fault, a clutch is in an open state, the engine control mode is set tobe a rotating speed mode, the ISG motor control mode is set to be not controlled, and the driving motor is driven by electromotive force generated by the ISG motor to drive the vehicle to run; and ifthe ISG motor or the driving motor breaks down, the engine directly drives the vehicle to run through the clutch in combination with the clutch. According to the limp control method of the hybrid vehicle, different processing is carried out according to different conditions, so that the vehicle can stably run to a safe area when the power battery breaks down, and the safety of the vehicle and passengers is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a limp control method for hybrid vehicles. Background technique [0002] The rapid development of new energy vehicles has put the safety of new energy vehicles facing a major test. Therefore, the handling of key faults in new energy vehicles has attracted much attention, especially when the power battery fails, how to ensure that the vehicle can continue to drive reliably Going to the safe area has become the focus of attention of those skilled in the art. [0003] Hybrid vehicles usually have two energy sources: power batteries and fuel engines. When the power battery fails, the fuel engine can only provide the energy needed to drive the vehicle. In the prior art, after the power supply failure of the power battery occurs, the driver is mostly required to enter the limp mode by powering off and restarting, and it does not distinguish between different situations. Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/50B60W50/02B60W30/18B60W10/06B60W10/08
CPCB60W20/50B60W50/029B60W50/0205B60W30/18063B60W10/06B60W10/08B60W2050/0292Y02T10/62
Inventor 颜行孙钦云黄家印
Owner 吉泰车辆技术(苏州)有限公司
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