Hybrid control method and system based on compound hydraulic steering system

Abstract

The invention relates to the technical field of hybrid power and discloses a hybrid power control method and a hybrid power control system based on a combined type hydraulic steering system. The control method comprises the following steps: (1) when an engine is started, an electric steering system is closed, a mechanical steering system works, and hydraulic oil flows out through a steering oilcan, enters the mechanical steering system, flows to an assisting steering gear to realize steering and finally flows into the steering oilcan; and (2) when the engine is closed, the mechanical steering system is closed, the electric steering system works, and the hydraulic oil flows out through the steering oilcan, enters the electric steering system, flows to an assisting steering gear to realize steering and finally flows into the steering oilcan. By utilizing the scheme that the mechanical steering system and the electric steering system are integrated together, and the mechanical steering system and the electric steering system assist the assisting steering gear and the steering oilcan, so that the redevelopment is not required, and the development cost can be lowered; and the driving steering requirements of vehicles are met, meanwhile, the energy consumption is reduced, the cost is saved, and the product reliability is improved.

Description

technical field [0001] The present invention relates to the technical field of hybrid power, more specifically, to a hybrid power control method and system based on a compound hydraulic steering system. Background technique [0002] According to the degree of mixing (electric power ratio), the hybrid system can be divided into: mild hybrid, moderate hybrid, and deep hybrid. The specific introduction is as follows: [0003] Mild hybrid power: Only the engine start-stop function is required, so the steering system can retain the mechanical steering system of the original car (no need to add an electric steering system), the mechanical steering system such as figure 1 As shown, it includes power steering gear a, steering oil pot b and mechanical steering pump c. [0004] Moderate and deep hybrid (plug-in hybrid): It is required to have a pure electric driving function (the engine must be stopped), so an electric steering system must be installed, such as figure 2 As shown, i...

AI Technical Summary

Problems solved by technology

[0005] However, for the hybrid power system with pure electric function, there are the following technical disadvantages: 1. If the mechanical steering system is cancelled, when the high-voltage power battery fails, the vehicle will have no power steering, which will bring safety hazards of difficult steering; 2. If the mechanical steering system is retained, there will be two systems of mechanical steering and electric steering, which will not only increase the cost (that is, 2 sets of steering oil pots, 2 sets of power steering, and 2 sets of oil circuit systems), it may be necessary to redevelop special parts , and the structure is complex, which is not conducive to the layout of the whole vehicle, and at the same time, it is not conducive to the control of the vehicle. When the two steering systems work at the same time, it brings: increased energy consumption, which is not conducive to energy saving and environmental protection. At the same time, when they are not working, it brings: driving potential safety hazards

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