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Method and system for variable volume prechamber ignitor

A pre-combustion chamber point and firearm technology, applied in ignition controllers, spark ignition controllers, engine ignition, etc., can solve the problems of increasing system cost and complexity, packaging constraints, etc., and achieve increased combustion stability and high engine speed. Effect of power capacity, increased power and fuel efficiency

Pending Publication Date: 2022-03-11
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an example, in a system with an active pre-chamber, adding a pre-chamber fuel injector and a pre-chamber air injector can add cost and complexity to the system and can introduce significant packaging constraints

Method used

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  • Method and system for variable volume prechamber ignitor
  • Method and system for variable volume prechamber ignitor
  • Method and system for variable volume prechamber ignitor

Examples

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Embodiment Construction

[0023] The following description relates to systems and methods for an engine having a pre-chamber ignition system. An engine can have multiple cylinders, each with a cylinder configuration that includes a pre-chamber, such as figure 1 shown. The pre-chamber may also include an adjustable pre-chamber cover that may be adjusted to at least two positions to vary the volume of the pre-chamber and, in some examples, to vary the volume of the pre-chamber. The size of the spark gap, such as Figure 2A to Figure 3B shown. The spark plug of the pre-chamber can be according to Figure 4 The wiring diagram shown is electrically coupled to the ignition system. For example, the volume of the pre-chamber can be varied to provide robust ignition across a range of engine loads and / or according to engine power, as Figure 5 and Figure 6 shown. For a given engine load, the optimal prechamber volume can vary based on the engine speed, as Figure 5 shown, and / or based on pre-chamber tem...

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Abstract

Methods and systems are provided for a variable volume pre-chamber igniter that may be coupled in an engine system. In one example, a method may include adjusting an internal volume of a pre-chamber igniter based on operating conditions by adjusting a position of a cover of the pre-chamber igniter, the pre-chamber igniter including a plurality of orifices fluidly coupling the pre-chamber igniter to a main combustion chamber of an engine cylinder. By adjusting the position of the cover, the internal volume of the pre-chamber igniter may be increased or decreased to provide robust ignition to the cylinder under various operating conditions.

Description

technical field [0001] The present description generally relates to systems and methods for engines having prechamber ignition systems. Background technique [0002] Internal combustion engines combust an air-fuel mixture within cylinders to generate torque, which can be used to propel the vehicle. In some such engines, an ignition source is used to ignite the air-fuel mixture within each cylinder during the compression stroke. For example, in a conventional spark ignition engine, each cylinder includes a spark plug for directly igniting the air-fuel mixture within the cylinder. In other examples, the air-fuel mixture within the cylinder may be ignited by a jet of hot gas and flame from a pre-combustion chamber (referred to herein as a pre-chamber). A passive prechamber may be a walled chamber located in the clearance volume of the cylinder, and may contain a spark plug. During engine operation, an air-fuel mixture is introduced into the cylinder, and a portion of the air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B19/12F02B19/16F02P15/00
CPCF02B19/12F02B19/16F02P15/00F02B19/06F02P13/00F02P9/002Y02T10/12F02D15/04
Inventor 托马斯·利昂迈克尔·切卡拉
Owner FORD GLOBAL TECH LLC
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