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Fuel injection system for spark-ignition internal combustion engine and relative control method

A technology of fuel injection system and internal combustion engine, applied in the direction of internal combustion piston engine, combustion engine, charging system, etc., can solve the problem that the compressor device cannot ensure the supply and so on

Pending Publication Date: 2021-09-17
MARELLI EURO SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, known compressor devices for supplying air to the pre-combustion chamber do not ensure supply only in the pressure range of 6-7 bar

Method used

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  • Fuel injection system for spark-ignition internal combustion engine and relative control method
  • Fuel injection system for spark-ignition internal combustion engine and relative control method
  • Fuel injection system for spark-ignition internal combustion engine and relative control method

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Experimental program
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Embodiment Construction

[0022] exist figure 1 In , reference numeral 1 designates a fuel injection system for a spark ignition internal combustion engine as a whole.

[0023] The injection system 1 includes: a plurality of injectors 2; a common rail 3, which supplies fuel to the injectors 2 under a certain pressure; a high-pressure pump 4, which supplies fuel to the common rail 3 through a supply pipe 5, and The high-pressure pump 4 is provided with a flow rate adjusting device 6; an electronic control unit 7 that brings the fuel pressure inside the common rail 3 to a desired value, which generally varies with time according to engine operating conditions; and a low-pressure pump 8 that The low-pressure pump 8 supplies fuel from the fuel tank 9 to the high-pressure pump 4 through a supply line 10 .

[0024] The electronic control unit 7 is coupled to the flow rate regulating device 6 to control the flow rate of the high pressure pump 4 to instantaneously supply the required fuel quantity inside the ...

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PUM

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Abstract

A fuel injection system (1) for a spark-ignition internal combustion engine having a number of cylinders (11), where a plurality of respective main combustion chambers (MC) are defined; a number of first injectors (2) and spark plugs (13) coupled to the cylinders (11); a number of combustion pre-chambers (PC), each obtained in the area of a respective spark plug (13); a number of extraction ducts (17; 28), which originate from a respective cylinder (11) to extract the gas mixture present inside the respective main combustion chamber (MC); a reserve (18), where the gases extracted by the extraction ducts (17; 28) are mixed with the quantity of fuel needed to obtain a combustion under stoichiometric conditions inside the combustion pre-chambers (PC); and a number of second injectors (27), each coupled to a respective combustion pre-chamber (PC), into which it injects the gas-and-fuel mixture coming from the reserve (18).

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority from Italian patent application number 102020000005683 filed on March 17, 2020, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to a fuel injection system for a spark ignition internal combustion engine and an associated control method. Background technique [0004] As is known, a fuel injection system for a spark ignition internal combustion engine is usually provided with: a plurality of injectors; a common rail which supplies fuel to the injectors under pressure; a high pressure pump which passes through a supply pipe that supplies fuel to the common rail; and a low pressure pump that supplies fuel from the fuel tank to the high pressure pump through the supply pipe. [0005] The spark ignition internal combustion engine also includes a plurality of cylinders, each cylinder housing a respective piston,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B19/10F02M26/41
CPCF02B19/108F02B19/1085F02M26/41F02M26/37F02M26/35F02B19/109F02B19/12F02B19/1023Y02T10/12
Inventor M·德切萨雷F·斯托拉
Owner MARELLI EURO SPA
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