A Coordinated Control Method for Braking Mode Switching of Hybrid Electric Vehicles
A hybrid electric vehicle and braking mode technology, applied in the direction of brakes, braking transmission devices, vehicle components, etc., can solve the problems of torque fluctuations, affecting the safety and smoothness of vehicle braking, and achieve large braking torque, Guaranteed braking feeling and the effect of ensuring braking safety
Active Publication Date: 2019-08-02
CHONGQING UNIV
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Problems solved by technology
However, the existence of multiple braking systems of hybrid electric vehicles determines the multiple braking modes of hybrid vehicles. The different dynamic response characteristics of different braking systems lead to large fluctuations in torque during the switching process of braking modes, which affects the overall performance of the vehicle. Braking safety and smoothness
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[0047] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0048] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.
[0049] figure 1 Shown is the structure diagram of plug-in four-wheel drive hybrid electric vehicle, 1 is the mechanical brake system, 2 is the main reducer of the front axle, 3 is the CVT, 4 is the clutch I, 5 is the front axle motor, 6 is the clutch II, 7 is the engine, 8 is a permanent magnet synchronous motor, and 9 is the rear axle final reducer. When driving, the front axle drive system of the hybrid electric vehicle is driven by the engine and the front axle motor, and the rear axle is driven by the rear axle motor; when bra...
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The invention relates to a hybrid automobile braking mode switching coordination control method. The hybrid automobile braking mode switching coordination control method comprises the steps of using a novel double-motor and double-clutch four-wheel drive plug-in hybrid automobile as a research object; firstly, analyzing the structural composition of the hybrid automobile; secondly, making a brake force distribution control strategy for the hybrid automobile, determining the operation area of each braking mode and establishing a dynamical model of the whole automobile under each braking mode; and thirdly, putting forward a motor and hydraulic brake moment coordination control method according to a torque fluctuation problem caused by different motor hydraulic dynamic response characteristics in the switching process of different braking modes. The hybrid automobile braking mode switching coordination control method has the advantages that the desired brake force is provided by using the characteristic of large and stable brake moment of a hydraulic brake system so as to guarantee brake feeling and brake safety; and after the desired brake force is reached, active coordination control is performed by using the characteristic of rapid and accurate motor response so as to achieve stable transition of braking mode switching.
Description
technical field [0001] The invention relates to the technical field of automobile manufacturing, takes the hybrid electric vehicle braking mode switching coordinated control as the research object, and proposes a hybrid electric vehicle braking mode switching coordinated control method. Background technique [0002] Hybrid vehicles can effectively reduce vehicle fuel consumption and emissions, and have become a research hotspot for major automobile manufacturers. At the same time, with the continuous improvement of living standards, people have higher and higher requirements for vehicle safety, comfort and ride comfort. Hybrid vehicles generally have multiple braking systems, such as hydraulic and electric braking systems. The hydraulic system can ensure the braking stability and braking efficiency of the vehicle; regenerative braking recovers energy and increases driving mileage. However, the existence of multiple braking systems of hybrid electric vehicles determines the ...
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IPC IPC(8): B60W30/18B60T13/58B60T13/74
CPCB60T13/58B60T13/74B60W30/18109B60W2710/18
Inventor 杨阳王超张权让何小龙
Owner CHONGQING UNIV