Pre-heating system and method for cold start of hybrid power vehicle

Abstract

The invention relates to a pre-heating system and method for cold start of a hybrid power vehicle. The pre-heating system comprises a driving motor water circulation device, an ISG motor water circulation device, an engine water circulation device, an engine sump water circulation device and a radiator, wherein water inlets and water outlets of the driving motor water circulation device, the ISG motor water circulation device and the engine water circulation device are connected with the two ends of the radiator respectively. The pre-heating system further comprises six electric control three-way valves, an electric control unit, a key switch and two temperature sensors. The method for implementing the pre-heating system comprises the steps that the electric control unit controls coupling and decoupling of a cooling circuit, and cold water of a driving motor is utilized to heat an engine and an ISG motor. Compared with the prior art, the pre-heating system and method for cold start of the hybrid power vehicle have the advantages of being low in cost, simple in structure, capable of improving cold start performance and reducing emission of the engine of the hybrid power vehicle, and the like.

Description

technical field [0001] The invention relates to a hybrid vehicle, in particular to a preheating system and method for a cold start of a hybrid vehicle. Background technique [0002] In today's world, the global environmental pollution is serious. In China, severe smog has appeared in many cities, and the soot and hydrocarbons produced during the cold start of road traffic vehicle engines are important reasons for this phenomenon. Hybrid power partially replaces fossil fuel consumption with electricity, and has been promoted by the government, but the frequent cold start process of hybrid power has also brought new problems. There are always problems such as high smoke emission and severe wear and vibration during cold start, which will lead to many serious consequences: 1) Increased friction and wear will greatly shorten the service life of the engine. Experiments have also proved that 76% of engine wear comes from this period , This is mainly caused by the destruction of ...

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Problems solved by technology

[0004] The object of the present invention is to provide a low-cost, simple in structure and capable of improving hybrid vehicle engine cold start performance and high emission problems in order to overcome the defects of complex structure and high cost of the existing hybrid vehicle cold start preheating device. Preheating system and method for cold start of hybrid electric vehicle

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