EHPS (electric hydraulic power steering system) of new energy bus and control method of EHPS
A technology of hydraulic power steering and control method, which is applied in the direction of automatic steering control components, power steering mechanism, steering mechanism, etc., and can solve the problem of inability to take into account low-speed steering portability and high-speed steering stability, cost increase, and energy consumption. Loss and other issues, to achieve the effect of scale effect and cost increase
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[0021] Such as figure 1 As shown, the electric hydraulic power steering system for a new energy bus disclosed in the present invention includes a vehicle speed detection unit, a vehicle controller, a DC AC inverter unit DCAC, and a power steering pump that are connected in sequence, and the power steering pump has a steering pump. Control unit and steering pump current detection unit.
[0022] When the vehicle controller judges that the vehicle state is neutral or parking brake, the power steering pump does not work; when the vehicle is running, different vehicle speeds set a low speed request and a high speed request to the steering pump control unit; During power steering, determine the low speed of the steering pump when idling according to the flow characteristic control curve of the steering pump; the steering pump control unit monitors the current change of the power steering pump in real time during vehicle operation. When the current change exceeds the set threshold, the s...
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