Power control method of plug-in hybrid electric vehicle

Abstract

The invention relates to the technical field of automobile control, and particularly relates to a power control method of a plug-in hybrid electric vehicle. The power control method comprises the steps of detecting the residual oil quantity and the residual electric quantity; if the residual oil quantity is less than a second oil quantity set threshold value or the residual electric quantity is less than a second electric quantity set threshold value, entering a power limiting mode; otherwise, entering a normal mode; in the normal mode, if the residual oil quantity is less than a first oil quantity set threshold value, conducting low oil quantity reminding; if the residual electric quantity is less than a first electric quantity set threshold value, conducting low electric quantity reminding, wherein the first oil quantity set threshold value is greater than the second oil quantity set threshold value, and the first electric quantity set threshold value is greater than the second electric quantity set threshold value; in the normal mode, PReq_Final is equal to PReq; and in the power limiting mode, the PReq_Final is a smaller value in the PReq and the PMax. According to the scheme,the probability that the vehicle is stopped in a dangerous area due to fuel exhaustion and power exhaustion can be reduced. The problem that an engine cannot be started after fuel oil is exhausted andelectricity is exhausted and then refueling is conducted is solved, the energy loss is reduced, and the economy is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a power control method of a plug-in hybrid electric vehicle. Background technique [0002] Existing plug-in hybrid electric vehicles can be charged externally. They usually run in pure electric mode first, and then drive in hybrid mode after the battery power is depleted to a balance value, and charge the battery in a timely manner. This control strategy has the following defects: [0003] 1. When the fuel is exhausted, if the driver continues to drive the vehicle, the engine will still be started in the hybrid mode, which will continue to consume power from the power battery, resulting in a waste of power from the power battery; [0004] 2. Continuing to drive the vehicle when the fuel is exhausted will cause the power to continue to drop until the power is exhausted. When the power of the power battery is completely exhausted, even if the fuel is replenished, the vehicl...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a power control method for a plug-in hybrid electric vehicle in view of the defects of the prior art, which can reduce the probability of the vehicle running out of fuel, running out of power and stopping in a dangerous area, and solving the problem of fuel consumption. The engine cannot be started after refueling after the power is exhausted, and at the same time reduce energy loss and improve economy

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