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Fuel oil/gas control and switching system of dual-fuel internal combustion engine

A dual-fuel internal combustion engine and conversion system technology, applied in engine control, internal combustion piston engine, combustion engine and other directions, can solve problems such as the increase of dual-fuel engines, potential safety hazards, explosion of air intake boxes, etc., to achieve high fuel substitution rate and improve safety. performance, low cost

Active Publication Date: 2013-02-27
NINGBO C S I POWER & MASCH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mixing method has great disadvantages: firstly, this mixing method has a great potential safety hazard, because there is a large amount of mixed gas stored in the intake box, and the mixed gas and the combustion chamber are separated by the intake valve, for multi-cylinder internal combustion engines , it is difficult to ensure that each intake valve is sealed during operation. If individual intake valves are not tightly sealed, flames will flow backward into the intake box, causing the entire intake box to explode, which may threaten the turbine. life of persons and safety of ships
The use of Heinsmann's control system has several weaknesses: 1. Since Heinsmann's control system is in a monopoly position in China, its price remains high, which adds a high cost to the development of dual-fuel engines
2. The gas-controlled high-speed solenoid valve has a short service life, and generally only needs to be replaced after one and a half years of use, which will add a lot of burden to future use and maintenance
3. The replacement rate of gas does not meet the requirements. At present, it can only replace 80%, and it is difficult to achieve a replacement rate of more than 90%.

Method used

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  • Fuel oil/gas control and switching system of dual-fuel internal combustion engine
  • Fuel oil/gas control and switching system of dual-fuel internal combustion engine
  • Fuel oil/gas control and switching system of dual-fuel internal combustion engine

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Embodiment 1

[0034] Embodiment 1, the pneumatic control pipeline using compressed air as the power source of the present invention is further described in detail: In the embodiment, the system mainly consists of a fuel gas control valve 1, a gas automatic pressure regulating valve 2, a single cylinder gas control valve 5 and The single-cylinder gas nozzle consists of 4 main unit components and a control pipeline. The control pipeline is provided with compressed air by a compressed air pump, and the control pipeline includes a control main pipe 91 , a control branch pipe 92 and an intake and discharge control pipe 93 . From Figure 1 to Figure 3 It can be seen that one end of the control main pipe 91 is directly connected to the compressed air pump, and the other end of the control main pipe 91 is connected to the air inlet A of the fuel gas control valve 1 . One end of the control branch pipe 92 is connected to the control main pipe 91, and the other end is connected to the upper cavity a...

Embodiment 2

[0048] Embodiment 2. In the embodiment, the control pipeline is a hydraulic control pipeline using hydraulic pressure as the power source, and the control pipeline is equipped with a hydraulic pump to provide hydraulic pressure. Other principles are the same as in Embodiment 1.

[0049] The advantage of the present invention is that it can realize automatic switching between two fuels without shutting down for switching. When the gas fuel is disconnected, the governor will automatically push the fuel control lever 7 to move in the refueling direction to increase the fuel quantity. At this point the invention is in the figure 2 In the state shown, the compressed air opens the gas automatic pressure regulating valve 2 to the maximum. Since the gas has been disconnected, no gas enters the cylinder to participate in the combustion, and the dual-fuel engine can only burn pure liquid fuel. At this time, the dual-fuel engine becomes Pure diesel engine; when the gas supply resumes, ...

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Abstract

The invention discloses a fuel oil / gas control and switching system of a dual-fuel internal combustion engine. The fuel oil / gas control and switching system of the dual-fuel internal combustion engine comprises a fuel oil / gas control valve, a fuel gas automatic pressure adjustment valve and intake manifolds, wherein the fuel oil / gas control valve and the fuel gas automatic pressure adjustment valve are connected by a control pipe line; the intake manifolds are communicated with an inlet header pipe and used for providing each cylinder of the internal combustion engine with fuel gas; each intake manifold is provided with a single-cylinder fuel gas control valve; each single-cylinder fuel gas control valve is connected with a single-cylinder fuel gas spray nozzle; the inlet header pipe is connected with a fuel gas pipe through the fuel gas automatic pressure adjustment valve; the fuel oil / gas control valve enables the relative position of a spool to be changed under the push-pull action of a fuel oil control rod of a high pressure oil pump of the internal combustion engine; through the control pipe line, the slow-opening quick-closing type on-off action of the fuel gas automatic pressure adjustment valve is realized; and therefore, the automatic adjustment and the switching of fuel oil and the fuel gas in the situations of load increase or sudden shutdown of the internal combustion engine, stable load, fuel gas interruption and fuel gas supply recovery are achieved.

Description

technical field [0001] The invention relates to the control technology of two fuels of a dual-fuel internal combustion engine, in particular to a fuel oil and gas control and conversion system of a dual-fuel internal combustion engine. Background technique [0002] At present, due to the rising price of light fuel oil and the requirements of environmental protection, the country actively promotes alternative fuels that are environmentally friendly and energy-saving, and especially advocates the use of dual-fuel internal combustion engines to replace light fuel internal combustion engines in the future to reduce the operating costs of ships and generator sets. Reduce NOx emissions. Major shipping companies also urgently need to adopt dual-fuel internal combustion engines in order to strive to meet national environmental protection requirements. [0003] Judging from the current development status of various internal combustion engine companies, most of them adopt the pre-mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F16K11/00
CPCY02T10/30
Inventor 徐玉国刘开敏吴杰
Owner NINGBO C S I POWER & MASCH GRP CO LTD
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