Single cylinder diesel EGR device based on high-pressure air two-stage supercharging and control method

A technology of two-stage supercharging and high-pressure air, which is used in engine control, charging system, mechanical equipment, etc., to achieve the effect of increasing EGR exhaust gas pressure and meeting EGR regulation requirements

Active Publication Date: 2016-04-06
HARBIN ENG UNIV
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  • Single cylinder diesel EGR device based on high-pressure air two-stage supercharging and control method

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[0024] Below in conjunction with accompanying drawing, the present invention is described in more detail:

[0025] combine figure 1 , the single-cylinder diesel engine EGR device based on high-pressure air secondary supercharging of the present invention comprises a single-cylinder diesel engine body D, an intake three-way valve 6, an exhaust three-way valve 2, a bypass valve 7, a one-way valve 1, an electromagnetic control Valve 14, first turbocharger, second turbocharger, EGR exhaust gas surge tank 12, EGR cooler 15, temperature sensor and flow meter. The inlet of the intake three-way valve 6 is connected to the high-pressure external air source, the outlet of the first end of the intake three-way valve 6 is connected to the inlet of the first turbine 8, the outlet of the first turbine 8 is connected to the inlet of the second turbine 10, and the outlet of the second turbine 10 Directly connected to the atmosphere, the outlet of the second end of the intake three-way valve ...

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Abstract

The invention provides a single cylinder diesel EGR device based on high-pressure air two-stage supercharging and a control method. The single cylinder diesel EGR device comprises an air inlet three-way valve, an exhaust three-way valve, a bypass valve, a one-way valve, an electromagnetic control valve, a first turbocharger, a second turbocharger, a waste gas pressure-stabilization tank, an EGR cooler, a temperature sensor and a flow meter. According to the single cylinder diesel EGR device, the two turbochargers in series connection are controlled so that two-stage supercharging of EGR waste gas can be achieved through high-pressure and high-speed compressed air, the problem of EGR waste gas backflow under different air inlet pressures, especially high air inlet pressure is effectively solved, and meanwhile the requirements for EGR adjustment under different medium, high and low work conditions can be met. The single cylinder diesel EGR device is particularly suitable for marine diesel engine energy saving and emission reduction or single cylinder diesel testing places or other place.

Description

technical field [0001] The invention relates to a marine diesel engine post-processing device and method, in particular to a single-cylinder diesel engine EGR device and control method based on high-pressure air two-stage supercharging. Background technique [0002] With ships about NO X How to effectively reduce diesel engine NO with increasingly stringent emission regulations X Pollutant emissions have become the focus of research. Among them, EGR (exhaust gas recirculation) technology has become the main technology of the current mainstream, and the most critical technology in the realization of EGR is the backflow of EGR exhaust gas. For a general naturally aspirated diesel engine, because the intake pressure is lower than the exhaust pressure, the EGR exhaust gas can easily enter the cylinder to achieve circulation. For a supercharged diesel engine, because the intake pressure is higher than the exhaust pressure, the EGR exhaust gas It is difficult to enter the cylin...

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Application Information

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IPC IPC(8): F02M26/08F02D21/08
CPCF02D21/08F02D2200/0406
Inventor 王银燕祖象欢崔欣洁王贺春李旭宋贵涛马传杰杨传雷
Owner HARBIN ENG UNIV
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