AIR MASS DETERMINATION FOR CYLINDER ACTIVATION AND DEACTIVATION CONTROL SYSTEMS
First Claim
1. A system comprising:
- a cylinder event module that determines an air-per-cylinder value for one of a cylinder intake event or a cylinder non-intake event of a current cylinder of an engine based on a mass air flow signal and an engine speed signal, wherein the engine includes a plurality of cylinders including the current cylinder;
a status module that generates a status signal indicating whether the current cylinder is activated or deactivated;
a deactivation module that, based on the status signal, determines a current accumulated air mass in an intake manifold of the enginefor air received by the intake manifold since a last cylinder intake event of an activated cylinder and prior to one or more cylinder non-intake events of one or more deactivated cylinders, andbased on a previous accumulated air mass in the intake manifold and the air-per-cylinder value; and
an activation module that, based on the status signal, determines an air mass value for the current cylinder based on the air-per-cylinder value and the current accumulated air mass.
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Accused Products
Abstract
A system includes a cylinder event module that determines an air-per-cylinder value for a cylinder intake event or a cylinder non-intake event of a current cylinder based on a mass air flow signal and an engine speed signal. A status module generates a status signal indicating whether the current cylinder is activated. A deactivation module, based on the status signal, determines a current accumulated air mass in an intake manifold of an engine: for air received by the intake manifold since a last cylinder intake event of an activated cylinder and prior to one or more consecutive cylinder non-intake events of one or more deactivated cylinders; and based on a previous accumulated air mass in the intake manifold and the air-per-cylinder value. An activation module, based on the status signal, determines an air mass value for the current cylinder based on the air-per-cylinder value and the current accumulated air mass.
29 Citations
20 Claims
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1. A system comprising:
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a cylinder event module that determines an air-per-cylinder value for one of a cylinder intake event or a cylinder non-intake event of a current cylinder of an engine based on a mass air flow signal and an engine speed signal, wherein the engine includes a plurality of cylinders including the current cylinder; a status module that generates a status signal indicating whether the current cylinder is activated or deactivated; a deactivation module that, based on the status signal, determines a current accumulated air mass in an intake manifold of the engine for air received by the intake manifold since a last cylinder intake event of an activated cylinder and prior to one or more cylinder non-intake events of one or more deactivated cylinders, and based on a previous accumulated air mass in the intake manifold and the air-per-cylinder value; and an activation module that, based on the status signal, determines an air mass value for the current cylinder based on the air-per-cylinder value and the current accumulated air mass. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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11. A method comprising:
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determining an air-per-cylinder value for one of a cylinder intake event or a cylinder non-intake event of a current cylinder of an engine based on a mass air flow signal and an engine speed signal, wherein the engine includes a plurality of cylinders including the current cylinder; generating a status signal indicating whether the current cylinder is activated or deactivated; based on the status signal, determining a current accumulated air mass in an intake manifold of the engine for air received by the intake manifold since a last cylinder intake event of an activated cylinder and prior to consecutive cylinder non-intake events of at least two deactivated cylinders, and based on a previous accumulated air mass in the intake manifold and the air-per-cylinder value; and based on the status signal, determining an air mass value for the current cylinder based on the air-per-cylinder value and the current accumulated air mass.
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Specification