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Air Per Cylinder Determination Systems and Methods

An air, single-cylinder technology, applied in the direction of electrical control, combustion engine, machine/engine, etc., can solve the problem of increasing engine torque output and so on

Active Publication Date: 2016-12-21
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the amount of air and fuel delivered to the cylinders generally increases the torque output of the engine

Method used

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  • Air Per Cylinder Determination Systems and Methods
  • Air Per Cylinder Determination Systems and Methods
  • Air Per Cylinder Determination Systems and Methods

Examples

Experimental program
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Embodiment Construction

[0033] Internal combustion engines combust an air and fuel mixture within cylinders to produce torque. Under some conditions, an engine control module (ECM) may deactivate one or more cylinders of the engine. The ECM may deactivate one or more cylinders, for example, to reduce fuel consumption.

[0034] The ECM determines a target firing fraction for engine cylinders to achieve an engine torque request. The numerator of the target firing fraction may indicate how many cylinders (Y) are activated during the next X cylinders in the firing order of the cylinders, where X is the denominator of the target firing fraction. The ECM activates and deactivates cylinders to achieve the target firing fraction.

[0035] The ECM also determines a first air cell (APC) value and a second air cell (APC) value. The ECM determines the first APC based on intake manifold pressure, air temperature, volumetric efficiency of the engine, and a model calibrated according to ideal gas law. The ECM d...

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PUM

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Abstract

An engine control system of a vehicle includes a cylinder control module a first air per cylinder (APC) module, an adjustment module, and a fuel control module. The cylinder control module determines a target fraction of activated cylinders of an engine. The first APC module determines a first APC value based on an intake manifold pressure and an air temperature. The adjustment module determines an APC adjustment value based on the target fraction of activated cylinders. The first APC module also determines a second APC value based on the first APC value and the APC adjustment value. The fuel control module controls fuel injection based on the second APC value and a target air / fuel mixture.

Description

technical field [0001] The present invention relates to internal combustion engines, and more particularly to systems and methods for learning cylinder air cylinder (APC) air state determination 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 is neither expressly nor implicitly acknowledged as having been described in this Background section and in respect of aspects that may not otherwise be considered prior art at the time of filing. It is the prior art of the present invention. [0003] Internal combustion engines combust an air and fuel mixture within cylinders to drive pistons, which produces drive torque. In some types of engines, airflow into the engine may be adjusted via a throttle valve. The throttle valve can adjust the throttle valve area, which increases or decreases the airflow into the engine. As ...

Claims

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Application Information

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IPC IPC(8): F02D41/30F02D41/24F02D41/06
CPCF02D41/062F02D41/2429F02D41/30F02D41/0085F02D41/18F02D41/2438F02D41/2454F02D41/2461F02D41/34F02D41/0002F02D2041/001F02D2200/0406F02D2200/0411F02D2200/0414F02D17/02F02D41/0087Y02T10/40
Inventor G·P·马修斯
Owner GM GLOBAL TECH OPERATIONS LLC