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Device and method for controlling an ignition device with a fuel-fed prechamber in an internal combustion engine

A pre-combustion chamber, internal combustion engine technology, applied in the direction of fuel injection device, internal combustion piston engine, electrical control, etc., can solve the problems of large work and cost, poor pressure sensor accuracy and durability, and achieve low complexity and high reliability. Effect

Pending Publication Date: 2022-02-01
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is possible to permanently use pressure sensors in the main combustion chamber, equipping the pre-chamber with pressure sensors is still a difficult task, resulting in a lot of work and costs
In addition, due to the limited space in the pre-chamber, only very small pressure sensors can be installed, which are less accurate and less durable than commonly used pressure sensors

Method used

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  • Device and method for controlling an ignition device with a fuel-fed prechamber in an internal combustion engine
  • Device and method for controlling an ignition device with a fuel-fed prechamber in an internal combustion engine
  • Device and method for controlling an ignition device with a fuel-fed prechamber in an internal combustion engine

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Embodiment Construction

[0051] figure 1 An exemplary cylinder 100 of an otherwise unspecified internal combustion engine is schematically shown, which may have more than one cylinder 100 . The engine may have, for example, two, three, four, six, eight or fewer / more cylinders 100 . The engine comprises at least one piston 2, driven by a crankshaft (not shown) via a connecting rod 3, for repeated reciprocating movements 100 in a cylinder to define a main combustion chamber therein.

[0052] An (air) intake port 4 with an intake valve 6 and an exhaust port 5 with an exhaust valve 7 are connected to the main combustion chamber 1 . Ambient air is drawn into the main combustion chamber 1 through the air intake 4 . Exhaust gas is discharged from the combustion chamber 1 via an exhaust port 5 . An ignition device 10 including a spark plug 10a, a pre-chamber fuel injector 10b and a pre-chamber 10c is attached to the internal combustion engine.

[0053] The spark plug 10a of the ignition device 10 may be e...

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Abstract

The present subject matter relates to a control unit and a method for controlling an ignition device with a fuel-fed prechamber in an internal combustion engine, wherein the control unit controls a jet strength of reactive jets entering from the prechamber into the main combustion chamber. The jet strength may be the ignition energy of the reactive jets which is generated by a combustion taking place inside the prechamber. Since the ignition energy may be difficult to measure during engine operation, pressure oscillations in the main combustion chamber induced by the ignition energy of the reactive jets can be detected instead by a commonly used determining means, such as, e.g., a pressure sensor or a knock sensor. Based on the detected pressure oscillations, a characteristic parameter representing the jet strength may be calculated which is suitable to be used as controlled variable in a feedback control. This leads to a control concept which allows for ensuring the efficiency and the emission limits of the internal combustion engine over its lifetime.

Description

technical field [0001] The subject matter relates to a control unit and a method for controlling an ignition device in an internal combustion engine with a fuel-fed pre-chamber, wherein the control unit controls the jet intensity of a reactive jet entering the main combustion chamber from the pre-chamber. Background technique [0002] In order to increase the combustion efficiency of an internal combustion engine, it is advantageous to use an ignition device with a fuel supply pre-chamber. The high ignition energy of this type of ignition is provided by the pre-combustion which takes place in the pre-chamber. The pre-combustion is initiated by injecting a small amount of fuel into the pre-chamber and igniting the resulting air-fuel mixture therein. Because the pre-chamber is connected to the main combustion chamber via a small orifice, combustion in the pre-chamber produces a reactive jet that passes from the pre-chamber into the main combustion chamber and ignites the air-...

Claims

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Application Information

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IPC IPC(8): F02B19/10F02M45/08F02M61/14
CPCF02B19/12F02B19/1085F02B19/108F02D41/3094F02D35/02F02D35/023F02D2041/288Y02T10/12Y02T10/40
Inventor H·绍尔兰米谷直树猿渡匡行
Owner HITACHI ASTEMO LTD