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An operating device and control method for cold start of a diesel engine in plateau and cold regions

A technology for operating devices in alpine regions, applied in engine starting, machine/engine, mechanical equipment, etc., can solve problems such as damage to glow plugs, improper operation, complex structure, etc., and achieve effective cold starting, reliable performance, and simple structure. Effect

Active Publication Date: 2019-05-17
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although intake air preheating has high reliability, is easy to use, and has a good starting effect, its structure is complicated, and improper operation will damage the glow plug

Method used

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  • An operating device and control method for cold start of a diesel engine in plateau and cold regions

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] An operating device for a diesel engine cold start in a plateau alpine region of the present invention includes a heat insulation box 9, and the outlet opened on a side wall of the heat insulation box 9 is communicated with the intake pipe 4 of the cylinder 2 through the outlet pipe 6, The inlet opened on the other side wall of the heat insulation box 9 is connected with the exhaust pipe 13 of the cylinder 2 through the introduction pipe 11, and the export control valve 7 is installed at the outlet of the heat insulation box 9, and the An introduction control valve 10 is installed at the inlet of the heat insulation box 9;

[0014] An intake throttle valve 5 is installed in the intake pipe 4 and above (upstream) the outlet end of the outlet pipe 6, and an exhaust throttle valve 12 is installed in the exhaust pipe 13 and above (downstre...

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Abstract

An operating device for cold start of diesel engines in highland and alpine regions and a control method thereof employ a starter to drive a plunger to compress low-temperature air, and then the air having an elevated temperature is introduced into a cylinder as fresh intake air, such that a temperature inside the cylinder rises to an ignition temperature at top-dead-center of compression stroke, thereby realizing smooth cold start of a diesel engine in an alpine region. The operating device and control method do not require a complicated preheating device. The invention has a simple structure and reliable performance, and can realize effective cold start of diesel engines in different low-temperature environments.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to an operating device and a control method for cold starting of a diesel engine in plateau and cold regions, which enable smooth cold starting of the diesel engine in a low temperature environment. Background technique [0002] On the one hand, due to the low atmospheric pressure in the plateau area, the pressure at the top dead center of the diesel engine at the starting speed is much lower than that in the plain area. Due to the pressure drop at the top dead center of compression, the minimum ignition temperature corresponding to this pressure will increase, making it difficult to ignite. On the other hand, due to the low temperature of the intake air in the low temperature environment of the alpine region, the temperature of the compression top dead center of the diesel engine is lowered, which further increases the difficulty of ignition. In addition, under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N19/02
CPCF02N19/001F02N19/02F02N2200/122
Inventor 刘海峰马俊生马桂香贺子晗尧命发
Owner TIANJIN UNIV
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