Systems and methods for diagnosing air and fuel offsets in a prechamber

A technology of pre-combustion chamber and combustion chamber, which is applied in the direction of combustion engine, electrical control, internal combustion piston engine, etc. It can solve the problems of difficulty in identifying the source of fire, increasing maintenance time and cost, and inability to distinguish, so as to reduce maintenance cost and time, Improved customer satisfaction and improved accuracy

Pending Publication Date: 2021-06-11
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the pre-chamber is firing, current misfire detection methods cannot distinguish between misfires caused by pre-chamber misfires and misfires caused by cylinder misfires
As a result, it can be difficult to identify the source of a misfire, which can increase repair time and associated costs

Method used

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  • Systems and methods for diagnosing air and fuel offsets in a prechamber
  • Systems and methods for diagnosing air and fuel offsets in a prechamber
  • Systems and methods for diagnosing air and fuel offsets in a prechamber

Examples

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Embodiment Construction

[0016] The following description refers to methods for diagnosing engine cylinders such as figure 1 Systems and methods for offsetting one or more injectors (eg, air injectors and / or fuel injectors) of a pre-combustion chamber of an engine cylinder shown). Engine cylinders can be included in various multi-cylinder configurations such as figure 2 in the example engine system configuration shown). can be based on image 3 method to operate the pre-combustion chamber to combust the air-fuel mixture in the pre-combustion chamber. In addition, according to Figure 4 In an exemplary method, the engine's controller may adjust cylinder fuel supply and airflow to perform pre-combustion chamber diagnostics, including determining and correcting pre-combustion chamber air injector and / or pre-combustion chamber fuel injection offsets. Figure 5 The shown exemplary timeline of prediction demonstrates adjustments to engine operation during pre-chamber diagnostics. Figure 6 to Figure 9...

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Abstract

The invention relates to systems and methods for diagnosing air and fuel offsets in a prechamber. Methods and systems are provided for a vehicle engine having a pre-chamber ignition system. In one example, a method may include adjusting one or more of an air injection amount and a fuel injection amount to a pre-chamber of an engine based on an air injection offset and a fuel injection offset learned while discontinuing fueling to cylinders of the engine and reducing air flow through the engine. In this way, air and fuel may be more accurately provided to the pre-chamber, thereby decreasing an occurrence of pre-chamber misfire.

Description

technical field [0001] The present description generally relates to methods and systems for controlling a vehicle engine to diagnose air and / or fuel excursions in active pre-combustion chambers of cylinders. Background technique [0002] Internal combustion engines combust an air / fuel mixture within cylinders to generate torque, which can be used to propel a 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-combustion chamber"). The pre-chamber may be a walled chamber located in the clearance volume of the cylinder and may contain the spark plug, O 2 Or air injectors as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00
CPCF02D41/123F02D41/2451F02D41/1475F02D41/1454F02D41/30F02D41/0002F02D13/0223F02D41/2432F02D37/02F02B19/1028Y02T10/12F02D13/0276F02D2041/389F02D2200/1015F02D2041/001F02D13/0207F02D13/06F02D2041/0012F02D41/221F02D41/2467F02D41/401Y02T10/40F02D13/0226F02D9/02
Inventor 克里斯·保罗·格鲁格拉
Owner FORD GLOBAL TECH LLC
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