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Cylinder exhaust gas recirculation distribution measurement systems and methods

A technology of gas composition and intake flow path, which is applied in the directions of exhaust gas recirculation, charging system, combustion air/combustion-air treatment, etc., and can solve the problems of laborious and expensive development and verification of EGR system

Pending Publication Date: 2019-08-23
FORD GLOBAL TECH LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the development and validation of EGR systems can be laborious and expensive, sometimes involving months of active testing and measurement aided by the engine's extensive equipment

Method used

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  • Cylinder exhaust gas recirculation distribution measurement systems and methods
  • Cylinder exhaust gas recirculation distribution measurement systems and methods
  • Cylinder exhaust gas recirculation distribution measurement systems and methods

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Embodiment Construction

[0011] The following description relates to systems and methods for cylinder exhaust gas recirculation (EGR) distribution systems. like figure 1 The engine system shown in may include one or more EGR systems. like figure 2 As depicted in, cylinder EGR distribution can be achieved by fluidly coupling a cylinder EGR distribution measurement system to figure 1 engine system to measure. In one embodiment, figure 2 The cylinder EGR distribution measurement system can include such as image 3 Mobile and / or portable cylinder EGR distribution measurement systems shown in . figure 2 and image 3 The cylinder EGR distribution measurement system may have improved performance relative to conventional EGR measurement systems, such as Figure 4 to Figure 7 shown. also, Figure 8 depicts the use of figure 2 and image 3 The cylinder EGR distribution measurement system measures the cylinder EGR distribution method.

[0012] Turn now figure 1 , which shows a schematic diagram ...

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Abstract

The disclosure provides cylinder exhaust gas recirculation distribution measurement systems and methods. Methods and systems are provided for measuring exhaust gas recirculation (EGR) distribution among individual engine cylinders. In one example, a method may include fluidly coupling a plurality of intake runners of an engine to a vacuum pump, diverting a portion of intake charge gas from the intake runner to a gas composition sensor with the vacuum pump, measuring an oxygen concentration of the diverted intake charge portion with the gas composition sensor, and estimating an EGR concentration of the intake charge based on the measured oxygen concentration.

Description

technical field [0001] The present specification generally relates to methods and systems for measuring exhaust gas recirculation distribution among individual engine cylinders. Background technique [0002] Internal combustion engines employ exhaust gas recirculation (EGR) to reduce NOx emissions that are produced in large quantities at higher peak engine combustion temperatures. Recirculating exhaust gas to the engine intake reduces peak engine combustion temperature by diluting the oxygen concentration, which reduces the rate of combustion, and also reduces peak engine combustion temperature by providing additional heat capacity to absorb the heat generated by engine combustion. However, higher peak in-cylinder temperatures and higher NOx emissions may result in the engine when EGR is not equally distributed among each of the engine cylinders. A typical EGR distribution measurement system utilizes a gas analyzer to measure the intake air from the intake port of a single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M26/17F02M26/46
CPCF02M26/17F02M26/46F02D41/0072F02D41/144F02D41/1443F02D41/1454F02D2200/0414F02D2200/0418F02M26/05F02M26/06F02M26/09F02M26/23F02M26/47F02M35/10222F02M2026/003Y02T10/40F02D2041/0067F02D2041/0075
Inventor 泰勒·莱西肖恩·斯潘鲍尔诺曼·奥波斯基查德·斯德特勒
Owner FORD GLOBAL TECH LLC