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A fuel supply system for marine dual-fuel engines that can avoid loss of natural gas exchange

A dual-fuel engine and fuel supply system technology, applied in combustion engines, internal combustion piston engines, charging systems, etc., can solve problems such as environmental damage and resource waste, and achieve the effects of economical combustion, waste avoidance, and environmental damage avoidance

Active Publication Date: 2017-12-01
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a marine dual-fuel engine fuel supply system that can solve the problems of environmental damage and resource waste caused by directly sweeping the residual mixed gas in the intake channel into the atmosphere during the ventilation process

Method used

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  • A fuel supply system for marine dual-fuel engines that can avoid loss of natural gas exchange

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Embodiment Construction

[0014] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0015] combine figure 1 The natural gas tank 1 is connected to the natural gas channel 3, and the natural gas channel 3 is connected to the natural gas and air mixer 5; a safety valve 2 is installed at the inlet of the natural gas channel 3, and a natural gas intake control valve 4 is installed at the outlet; the air main pipe 11 is controlled by a throttle valve 12 Divided into two upper and lower pipes, one is called air channel 13, leading to the upper part of the intake valve 15, where the upper part of the intake valve 15 is about 8 cm and converges with the mixed gas inlet channel 6; the other is connected upward to the mixer 5; the mixed gas The outlet is connected to the mixed gas inlet port 6, and the mixed gas inlet port 6 converges with the air inlet port 13 at about 8 cm above the intake valve 15 to form a manifold connected to the intake valve 15, lea...

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Abstract

The invention aims to provide a ship dual-fuel engine fuel supply system capable of preventing a natural gas change loss. The ship dual-fuel engine fuel supply system comprises a natural gas tank, a mixer, a combustion chamber and an air main pipe; an intake main pipe is arranged in an intake valve of the combustion chamber; an exhaust passage is formed in an exhaust door of the combustion chamber; a diesel nozzle is mounted in the top of the combustion chamber; the natural gas tank is communicated with an inlet of a natural gas channel; an outlet of the natural gas channel is communicated with the mixer; the mixer is communicated with the intake main pipe through a mixed gas intake passage; the tail end of the air main pipe is divided into a first branch pipe and a second branch pipe; the first branch pipe is communicated with the mixer; and the second branch pipe is communicated with the intake main pipe. The ship dual-fuel engine fuel supply system prevents mixed gas from being directly fed into air in the gas change process, so that the fuel waste and the environmental damage are prevented.

Description

technical field [0001] The invention relates to a dual-fuel engine, in particular to a marine pre-mixed dual-fuel engine. Background technique [0002] With the increasingly stringent emission regulations and the increasingly prominent contradictions in oil supply, the application of traditional diesel engines in the shipping industry is facing more and more challenges. Many countries have begun to study alternative fuels used in traditional engines. Among them, natural gas has attracted widespread attention because of its high calorific value, clean emissions, and large reserves. [0003] The normal pressure ignition temperature of natural gas is about 600-650°C, which is much higher than that of diesel (about 280°C). Diesel fuel is used to provide ignition energy, that is, a dual-fuel engine. Diesel injected at high pressure at the end of the compression stroke will form a large number of fire nuclei in the combustion chamber, uniformly ignite the surrounding combustibl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M21/02
CPCF02M21/0212F02M21/0218Y02T10/30
Inventor 丁宇王奎向拉贲虹凯孙化东
Owner HARBIN ENG UNIV
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