Safety protection control method of hybrid vehicle

A technology for hybrid electric vehicles and safety protection, which is applied in the direction of hybrid electric vehicles, motor vehicles, program control, etc., to achieve the effect of meeting driving needs

Active Publication Date: 2010-02-17
CHERY AUTOMOBILE CO LTD
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  • Abstract
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Problems solved by technology

[0003] Aiming at the possible faults of the hybrid system and the safety problems caused by them, the present invention provides a safety protection control method. When a fault is detected by the hy

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  • Safety protection control method of hybrid vehicle
  • Safety protection control method of hybrid vehicle

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Embodiment Construction

[0019] Attached below Figure 1-5 The present invention will be specifically described.

[0020] 1) HCU and SCU use the same algorithm to calculate the allowable torque of the engine. HCU sends the calculated result to SCU for comparison. If the difference between the calculated results of HCU and SCU exceeds the allowable error range Δ, it is considered that HCU The algorithm of one of the control units of the SCU is confused, which seriously affects driving safety. At this time, the SCU will report fault 1 (such as figure 1 ) and turn off the inverter, cut off the communication between the HCU and the CAN transceiver, and send a signal to the CAN transceiver to turn on the fault light (such as Figure 5 ).

[0021] 2) The SCU compares the two signals of the bottom switch of the clutch and the two signals of the neutral switch. If the two signals of the same component are different, it is considered that the driving safety is affected (such as figure 2 ). The SCU will r...

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Abstract

The invention discloses a safety protection control method of a hybrid vehicle. The method is characterized in that a hybrid control unit (HCU) and a safety control unit (SCU) calculate the allowable torque of an engine by the same algorithm; the HCU sends a calculation result to the SCU which carries out comparison; and if a difference between the results calculated by the HCU and the SCU exceeds a range of allowable error, the SCU reports a first failure signal, closes an inverter, switches off communication between the HCU and a CAN receiver and sends a signal for lighting a failure light to the CAN receiver. The method ensures the calculation accuracy of various control units, monitors special parts, ensures the operation of a hybrid system in the normal working states of the special parts and avoids influencing the running safety due to part failures.

Description

technical field [0001] The invention belongs to the field of hybrid electric vehicle control, realizes the safety monitoring function of the hybrid power system, handles different safety faults in an optimal manner under relatively safe conditions, and satisfies the driver's driving needs to the greatest extent. Background technique [0002] Automobiles have gradually become a means of transportation in people's daily life, and the safety issues arising from them have been increasingly understood and valued by people. "Car safety" has become one of the performances that people give priority to when purchasing a vehicle, and how to design a safer car has become one of the core issues that various car manufacturers are concerned about. Compared with traditional vehicles, hybrid vehicles have more special components and functions such as auxiliary drive and power generation. When the hybrid system fails or parts fail, the safety performance of the vehicle will be affected. C...

Claims

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Application Information

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IPC IPC(8): B60W20/00B60W50/02G05B19/048B60W50/04
Inventor 马玉岩
Owner CHERY AUTOMOBILE CO LTD
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