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Dynamic hysteresis control systems and methods

A control system and hysteresis technology, applied in the field of internal combustion engines, can solve problems such as instability

Inactive Publication Date: 2015-06-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, controlling engine idle speed in the torque domain is inherently unstable because the engine speed must be constantly adjusted to achieve the desired torque

Method used

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  • Dynamic hysteresis control systems and methods
  • Dynamic hysteresis control systems and methods
  • Dynamic hysteresis control systems and methods

Examples

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Embodiment Construction

[0065] The following description is merely exemplary in nature and is in no way intended to limit the disclosure, its application or uses. For purposes of clarity, the same reference numbers are used in the drawings to refer to similar elements. As used herein, the phrase at least one of A, B, and C should be understood to mean a logical (A or B or C), using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present disclosure.

[0066] As used herein, the term module may refer to a portion that is or includes: an application specific integrated circuit (ASIC); a circuit; a combinational logic circuit; a field programmable gate array (FPGA); a processor (shared, dedicated, or grouped) that executes code; ); other suitable components that provide the required functions; or a combination of some of the above, such as a system on a chip. The term module may include memory (shar...

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Abstract

A control system includes an error module, a selection module, a control module, and a hysteresis module. The error module determines an error value based on a difference between a desired position and a measured position of one of a throttle valve and an exhaust gas recirculation (EGR) valve of a vehicle. The selection module sets a control value equal to one of the error value and zero based on a comparison of the error value and a hysteresis value. The control module generates a control signal based on the desired position and the control value and actuates the one of the throttle valve and the EGR valve using the control signal. The hysteresis module selectively varies the hysteresis value.

Description

technical field [0001] The present disclosure relates to internal combustion engines, and more particularly to valve control systems and methods. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors, to the extent described in this Background section, and aspects of the invention that may not have constituted prior art at the time of filing are not admitted, expressly or by implication, to be prior art to the present disclosure. [0003] Internal combustion engines combust an air and fuel mixture within cylinders to drive pistons and generate drive torque. Air flow into the engine is regulated by a throttle valve. More specifically, the throttle adjusts throttle area, which increases or decreases air flow into the engine. When the throttle area increases, the air flow into the engine increases. A fuel control system adjusts the rate of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00
CPCF02D9/02F02D13/0219F02D29/06F02D41/0002F02D41/0077F02D2041/0017F02D2200/0404F02D2200/1002F02D2250/21F02M26/49Y02T10/12Y02T10/40
Inventor P. A. 鲍尔勒J. L. 沃尔兴
Owner GM GLOBAL TECH OPERATIONS LLC