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System and method for engine control

An engine and upstream technology, applied in the direction of engine control, electric engine control automatic control, automatic control, etc., to achieve the effect of reducing knocking and improving exhaust emission quality

Active Publication Date: 2022-08-09
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the measured exhaust air-fuel ratio may run leaner than expected

Method used

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  • System and method for engine control
  • System and method for engine control
  • System and method for engine control

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Embodiment Construction

[0017] The following description relates to systems and methods for diagnosing degradation of an EGR system due to a disconnected upstream hose of an EGR differential pressure sensor. figure 1 An example engine system including an EGR system is shown in . EGR can be provided to e.g. according to image 3 An example method of achieving desired engine dilution. as in Figure 4 As shown in the method, the amount of EGR entering the engine may be used to generate the fuel command. If the upstream hose of the EGR differential pressure sensor becomes disconnected, it can appear as if more EGR is entering the engine than it actually is, which can be determined by the engine controller based on figure 2 method for non-invasive detection. The EGR differential pressure sensor upstream hose can then be passed, for example, according to Figure 5 The method runs dedicated monitoring to diagnose. Image 6 An example timeline is shown for identifying EGR system degradation due to a d...

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Abstract

The present application relates to systems and methods for engine control that provide for adjusting spark in an engine in response to indications of exhaust gas recirculation (EGR) system degradation due to a disconnected upstream hose of an EGR differential pressure sensor Methods and systems for timing and fueling. In one example, a method includes setting an EGR rate to zero and triggering execution of an EGR differential pressure sensor upstream hose diagnostic routine in response to an integrated knock intensity greater than a threshold intensity and a fuel control trim greater than a threshold rich. Additionally, spark timing and fueling may be set for zero EGR.

Description

technical field [0001] The present invention generally relates to methods and systems for controlling an engine in response to degradation of exhaust gas recirculation control. Background technique [0002] The engine may include an external exhaust gas recirculation (EGR) system to reduce NOx emissions and increase engine efficiency. An external EGR system may couple the engine exhaust manifold to the engine intake manifold via an EGR passage. Additionally, the EGR system may include temperature sensors and / or pressure sensors to estimate the amount of EGR flowing to the engine cylinders. During the course of operation, EGR actuators, sensors, pipes or hoses may become disconnected. EGR system components may become dislodged due to engine boost pressure, vibration caused by irregular road surfaces, or other conditions. Degradation of the EGR system may degrade engine performance, such as by increasing emissions or reducing fuel economy. [0003] As one example, the EGR ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D43/00
CPCF02D35/027F02D37/02F02D41/005F02D41/0077F02D41/3094F02D41/40F02D2041/389F02D2200/02F02D41/0072F02M26/49F02P5/045F02P5/1504F02P5/1516F02M35/1038F02P5/152Y02T10/40F02D41/0052F02D41/1454F02D43/04
Inventor C·P·格鲁格拉
Owner FORD GLOBAL TECH LLC