Low temperature cold starting device of methanol engine and control method thereof

A technology of methanol engine and control method, which is applied in engine control, machine/engine, electrical control, etc., can solve problems such as high cost and complexity

Inactive Publication Date: 2008-07-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the system is more complex and costly

Method used

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  • Low temperature cold starting device of methanol engine and control method thereof

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Embodiment Construction

[0011] The technical solutions of the present invention will be further described below through specific examples. This embodiment is carried out under the condition that the ambient temperature is -15°C. Through the invention, the starting can be implemented smoothly, and the smooth switching from the gasoline mode to the methanol mode is realized, and the expected effect is achieved.

[0012] The specific parameters of the experimental engine are as follows:

[0013] Engine parameters:

[0014] manufacturer

Dongfeng Nissan

Bore x stroke (mm x mm)

78×83.6

model

HR16DE

compression ratio

9.8

the form

inline four cylinder

Rated power / speed(kW / r / min)

80 / 6000

Displacement (L)

1.598

Maximum torque / speed (N m / r / min)

153 / 4400

[0015] The specific experimental process is as follows:

[0016] The temperature sensor 14 detects that the temperature of the engine ...

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Abstract

The invention discloses a low-temperature cold start device for the engine with methanol as fuel and the control method, which is characterized in that a gasoline vacuum atomizer is arranged in the cold start device; one end of the atomizer is connected with a gasoline pump and the other end is connected in parallel with a gas inlet pipe of the methanol engine through a solenoid valve and a fuel feed pipe; the opening of the solenoid valve is controlled by an electric control unit to control the change from the gasoline mode to methanol mode. The control method is as follow: i. when the device temperature is below 0 DEG C, the electric control unit can drive the solenoid valve to start the engine working at gasoline mode; ii. when the device temperature is higher than or equal to 10 DEG C and when the stable speed of the engine exceeds 700 r/min., the injection quantity from the methanol spray nozzle is increased gradually, and the lift range of the solenoid valve is decreased automatically by the electric control unit; iii. when the consumption quantity of gasoline fuel is zero, the solenoid valve is switched off and the engine is operated at the methanol mode. The low-temperature cold start device for the engine with methanol as fuel and the control method has the advantages that because the methanol can be changed to gasoline when starting, the normal starting of the device in high latitude area can be realized and the low-temperature cold start device is easily used for the prior methanol engine.

Description

technical field [0001] The invention relates to a gasoline atomizer and a control method thereof for an engine cold start with auxiliary methanol as fuel. Background technique [0002] At present, the traditional engine can directly burn methanol fuel after some improvements. The methanol nozzle is located in the intake manifold. The fuel comes from the fuel tank and enters the combustion chamber through the methanol nozzle for combustion under the action of the fuel pump. Due to the large latent heat of vaporization of methanol, a large amount of heat is absorbed during the vaporization process, causing the temperature of the intake pipe and fuel injector to be too low, resulting in poor vaporization of methanol and difficulty in cold starting. Generally, when the ambient temperature is lower than 5°C, it is difficult to start the engine from a cold state. In the alpine region of minus 30°C, without an auxiliary device, it is impossible to start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/08F02D41/06
Inventor 姚春德徐元利杨建军陈绪平张志辉黄钰
Owner TIANJIN UNIV
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