An internal combustion engine with control of fuel gas injection pressure

A fuel gas and internal combustion engine technology, applied in fuel injection control, electrical control, internal combustion piston engine, etc., can solve the problems of low maximum combustion pressure, damage, wear, etc., and achieve the effect of saving maintenance costs, reducing damage risks, and optimizing efficiency

Active Publication Date: 2014-01-15
MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this scheme for compensating the energy density variation of the fuel gas and achieving the desired engine speed results in lower efficiency because the maximum combustion pressure in the combustion chamber is lower than the optimum operating point
Likewise, if the energy density of the fuel gas is higher than the reference gas, then the maximum combustion pressure will be higher than that of the designed engine, which will lead to increased wear and potential damage to the engine

Method used

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  • An internal combustion engine with control of fuel gas injection pressure
  • An internal combustion engine with control of fuel gas injection pressure

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Embodiment Construction

[0026] The internal combustion engine 1 according to a preferred embodiment of the present invention may be a two-stroke crosshead diesel engine, such as figure 1 shown in . This engine 1 can be brand MAN Diesel and type MC or ME, or brand Model Sulzer RT-flex or Sulzer RTA, or brand Mitsubishi Heavy Industries (Mitsubishi Heavy Industries). Engines of this type are large engines that are typically used as the main engine in a ship or as a stationary engine in a power plant. The cylinder may for example have a cylinder bore in the range of 25 cm to 120 cm and the engine may for example have a power in the range of from 3000 kW to 120000 kW. Engine speed typically ranges from 40 rpm to 250 rpm. Compression ignition internal combustion engines according to the invention are typically capable of using heavy fuel oil as the primary fuel.

[0027] figure 1 The engine 1 has a plurality of cylinders, and the cylinder liner 2 is installed in the cylinder portion 3 of the engine ...

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Abstract

An internal combustion engine, such as a two-stroke crosshead Diesel engine, comprising a fuel gas supply system and cylinders provided with fuel gas injectors for injecting fuel gas directly into combustion chambers in the cylinders, and at least one engine control unit controlling the amount of fuel gas injected into the combustion chambers according to an applied fuel index for obtaining a desired engine speed at a given engine bad, where the fuel index defines an amount of fuel gas to be injected into the cylinders per injection, and the amount of fuel gas injected is controlled by adjusting the duration of a fuel gas injection period. A sensor arrangement is provided for measuring the engine bad during operation, and the at least one engine control unit controls the injection pressure of fuel gas into the combustion chambers in response to changes in the energy density of the fuel gas, so that the applied fuel index corresponds to the reference fuel index.

Description

technical field [0001] The present invention relates to an internal combustion engine, such as a two-stroke crosshead diesel engine, comprising a cylinder provided with a fuel gas injector for injecting fuel gas directly into a combustion chamber of the cylinder and at least one engine control unit, said at least one The engine control unit controls the amount of fuel gas injected into the combustion chamber according to an applied fuel index used to obtain the desired engine speed at a given engine load, wherein the fuel index defines the amount of fuel gas injected into the cylinder for each injection The amount of fuel gas is controlled by adjusting the duration of the fuel gas injection period. Background technique [0002] There is an increasing interest in reducing carbon dioxide, nitrogen monoxide and sulfur emissions from the operation of internal combustion engines, so alternative fuel substitutes to conventional fuel oils have been investigated. Operation of large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30F02D41/04F02D19/06
CPCY02T70/5218Y02T10/30F02D19/0607F02D41/3836
Inventor 延森·瑞尼·邦伽瑞德
Owner MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
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