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Method and system for controlling vehicle mode switching of a hybrid electric vehicle

A hybrid electric vehicle and mode switching technology, applied in the field of vehicle control, can solve the problems of complex mode switching conditions and multiple vehicle control modes, and achieve the effect of simple control logic, reasonable allocation, and smooth switching

Active Publication Date: 2019-06-11
BEIQI FOTON MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is that in the existing vehicle control mode switching method, there are many vehicle control modes and the mode switching conditions are complicated, so a vehicle control mode is only three, and the control logic is simple and clear. Hybrid vehicle mode switching control method and system for realizing timely and reasonable switching of various modes based on the basis

Method used

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  • Method and system for controlling vehicle mode switching of a hybrid electric vehicle
  • Method and system for controlling vehicle mode switching of a hybrid electric vehicle
  • Method and system for controlling vehicle mode switching of a hybrid electric vehicle

Examples

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Embodiment 1

[0056] Such as Figure 2-4 As shown, the present embodiment provides a hybrid vehicle mode switching control method, including the following steps:

[0057] S1: When the actual mode of the vehicle is the pure electric mode, it is detected that the driver's demand torque is greater than the pure electric-series mode switching calibration value, the desired mode of the vehicle becomes the series mode, and the driver's demand torque is passed through the stepping on the accelerator pedal Judging by the quantity, the pure electric-series mode switching calibration value of a car has been preset before leaving the factory, and the specific value can be obtained through a two-dimensional table query;

[0058] S2: Control the car starter and generator to start the engine. At this time, the actual mode of the whole vehicle is still the pure electric mode;

[0059] S3: It is detected that the engine start is completed, and the actual mode of the whole vehicle is switched from pure elect...

Embodiment 2

[0076] Such as Figure 2-5 As shown, this embodiment provides a method for switching modes of a hybrid electric vehicle, wherein the specific process of sequentially switching from pure electric mode to series mode and parallel mode is as follows:

[0077] Before time T1, the whole vehicle is in the high-voltage parking state, the accelerator pedal of the vehicle is 0, the driver's demand torque is 0, the vehicle speed and engine speed are also 0, and the clutch is disengaged. Both the desired mode and the actual mode of the vehicle are purely electric.

[0078] At time T1, the driver depresses the accelerator pedal to a small amount, and the driver's required torque is a small value, that is, greater than 0 and less than the calibration value of pure electric-series mode switching. The expected mode and actual mode of the car are still pure electric mode. In pure electric mode, the driving force is provided by the drive motor to meet the driver's demand torque.

[0079] At...

Embodiment 3

[0087] Such as Figure 6 As shown, the present embodiment provides a hybrid vehicle mode switching control system, including:

[0088] The first demand torque detection module M1: when the actual mode of the whole vehicle is pure electric mode, it is detected that the driver's demand torque is greater than the calibration value of pure electric-series mode switching, and the expected mode of the whole vehicle becomes the series mode;

[0089] Engine start control module M2: control the car starter generator to start the engine, at this time the actual mode of the vehicle is still pure electric mode;

[0090] The first engine detection module M3: detects that the engine start is completed, and the actual mode of the whole vehicle is switched from pure electric mode to series mode.

[0091] Preferably, before the first demand torque detection module, it also includes:

[0092] The second demand torque detection module: when the whole vehicle is in the high-voltage parking stat...

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Abstract

The invention provides a whole vehicle mode switching control method and system for a hybrid electric vehicle. The method includes the following steps that when the actual mode of the whole vehicle is a pure electric mode, it is detected that the needed torque of a driver is larger than a switching calibration value of a pure electric-series mode, and the expected mode of the whole vehicle is changed into a series mode; a vehicle starting and power generating integrated machine is controlled to start an engine, and at this moment, the actual mode of the whole vehicle is still the pure electric mode; and when it is detected that the engine is completely started, the actual mode of the whole vehicle is switched into the series mode from the pure electric mode. By the adoption of the method and system, the technical problems that in an existing whole vehicle control mode switching method, many whole vehicle control modes exist, and mode switching conditions are complex are solved; and on the basis that control logic is simple and clear, various modes of the whole vehicle can be reasonably and smoothly switched in time, and electric energy and fuel energy are reasonably distributed, so that energy consumption is reduced significantly, and meanwhile the good starting and stopping performance and the driving performance are guaranteed.

Description

technical field [0001] The invention relates to the technical field of vehicle control. Specifically, it relates to a method and system for controlling mode switching of a hybrid electric vehicle. Background technique [0002] Such as figure 1 As shown, the structure of the existing automotive hybrid power system, the solid line indicates the mechanical connection, and the dotted line indicates the control signal, including the engine, clutch, clutch actuator, ISG motor, drive motor, AMT gearbox and final drive. The hybrid power system is a dual-motor single-clutch mode, and the control system is complicated, but it can realize the switching of various modes such as pure electric, series, parallel, start-stop, etc. [0003] In the above-mentioned hybrid power system, the switch of the vehicle control mode is one of the key technologies. Through the switch of each vehicle control mode, good start-stop performance, reasonable distribution of electric energy and fuel energy c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/182
Inventor 孔令安
Owner BEIQI FOTON MOTOR CO LTD
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