Single-fuel liquified-petroleum-gas automobile cold-state starting heat-insulation preheating system

A liquefied petroleum gas and cold start technology, which is applied to charging systems, combustion engines, internal combustion piston engines, etc., can solve problems such as low coolant temperature and inability to evaporate liquid-phase LPG in the evaporator

Inactive Publication Date: 2007-08-29
JILIN UNIV
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low coolant temperature and inability to evaporate the liquid phase LPG in the evaporator during the cold start of the traditional LPG engine, and provide a single-fuel liquefied petroleum gas vehicle cold start heat preservation and preheating system

Method used

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  • Single-fuel liquified-petroleum-gas automobile cold-state starting heat-insulation preheating system

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Embodiment Construction

[0014] The specific content and working process of the present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0015] In the cold start heat preservation and preheating system designed by the present invention, when the engine is started in a cold state, the electric control unit 5 controls to enter the cold start preheating small cycle, and the control unit 5 controls the solenoid valves 16 and 17 at both ends of the heat preservation tank 10 to open simultaneously. Connect the heat preservation tank, control the reversing valves 6 and 8 to cut off the connection with the original cooling circuit of the engine, connect the cold start preheating small cycle, control the operation of the electric water pump 7, and the high-temperature coolant in the heat preservation tank passes through the solenoid valve 17, reversing Valve 6, electric water pump 7, and reversing valve 8 enter the evaporator 9 to preheat the LP...

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Abstract

The invention relates to the automobile and engine cold starting technique, especially relating to an automobile cold starting heat-preservation preheating system adopting single fuel liquefied petroleum gas, comprising the original engine cooling system, preheating small circulating system and preheating control system, characterized in that: the preheating small circulating system is connected in parallel in the original engine cooling system and comprises evaporator, heat preservation jar and an electric water pump, where the heat preservation jar is connected in series in the cooling liquid loop behind the evaporator and the inlet and outlet of the heat preservation jar are equipped with electromagnetic valves, the inlet and outlet where the cold starting preheating system and the original engine cooling system are connected in parallel are respectively equipped with change valves, the electric water pump is installed between the two change valves and the control unit is connected through control lines with the engine, electromagnetic valves, change valves and electric water pump.

Description

technical field [0001] The invention relates to automobile and engine cold start technologies, in particular to an automobile cold start heat preservation and preheating system using liquefied petroleum gas. Background technique [0002] In the single-fuel liquefied petroleum gas (LPG) vehicle fuel supply system, the liquid-phase LPG flows out from the fuel tank into the evaporator, and is preheated by the heat of the engine coolant. Maintain a stable pressure in the engine, and then the engine electronic control unit controls the gas nozzle to spray the gas into the engine intake port quantitatively and regularly, and then enters the engine for combustion. However, when the engine is started in a cold state, especially in the cold season in the north, the temperature of the engine coolant is low, and the latent heat of vaporization of LPG is large. In the evaporator, the liquid phase LPG cannot be evaporated into the gas phase, which makes it difficult to start the LPG engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/06
CPCY02T10/32Y02T10/30
Inventor 高莹李君朱昌吉杨世春江华春马光兴王立军
Owner JILIN UNIV
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