Engine start-stop management system and method for a single-motor hybrid system
A technology of hybrid power system and management system, applied in the field of engine start-stop management system of single-motor hybrid power system
Active Publication Date: 2021-04-16
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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The system and method solve the problem of how to realize optimal engine start-stop management under various working conditions
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[0032] The following are specific embodiments of the present invention, and further describe the technical solution of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.
[0033] Such as Figure 1-3 As shown, the engine start-stop management system of the single-motor hybrid system includes
[0034] Obtaining module 1, used to obtain the current SOC of the power battery;
[0035] The SOC judging module 2 is used to judge whether the current SOC is greater than the SOC threshold value 1, and if the current SOC is less than the set SOC threshold value 1, it is judged whether the current SOC is in the uplink segment or in the downlink segment;
[0036]Threshold determination module 3 is used to determine the current engine start-stop demand torque threshold. When the current SOC is greater than the SOC threshold value one, it is determined that the current engine start-up demand torque is the start-...
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The invention provides a single-motor hybrid power system engine start-stop management system and method, belonging to the technical field of hybrid vehicle energy management strategies. It solves the problem of how to realize optimal engine start-stop management under various working conditions. The system includes an acquisition module, an SOC judgment module, a threshold determination module, a torque judgment module and an execution module. The method includes the following steps: judging whether the current SOC is greater than the SOC threshold value 1, if the current SOC is less than the set SOC threshold value 1, judging whether the current SOC is in the uplink section or in the downlink section; determining the current engine start-stop demand torque threshold; When the current demand torque meets the current engine start-stop demand torque threshold, an engine start-stop control instruction is sent. By distinguishing the SOC upward and downward processes, the differential control of engine start and stop is carried out, which is beneficial to eliminate the low-efficiency operating point of the engine and frequent start and stop at low vehicle speeds, increases the running time of the engine in the low SOC section, and ensures short-term high efficiency of energy use.
Description
technical field [0001] The invention belongs to the technical field of hybrid vehicle energy management strategies, and relates to a system and method for engine start-stop management of a single-motor hybrid power system. Background technique [0002] The engine start-stop strategy is an important component of the energy management strategy, which is related to the output of engine energy and the control of idle fuel consumption. The current common engine start-stop strategy is a single rule to determine the required torque to start and stop the engine based on SOC and vehicle speed. Generally, it is set based on engine efficiency or system efficiency considerations. SOC is the charge of the power battery. That is, when the SOC is low, the required torque threshold for starting the engine is low, and the shutdown threshold is also close to 0, so that the engine can be started with a small throttle, and it is not easy to stop, increasing the working conditions of the engine ...
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IPC IPC(8): B60W20/15F02D29/02
CPCB60W2510/244B60W20/15F02D29/02
Inventor 王景蓉林潇姜博王来钱杨超群郭思阳巴特
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD