Control system and control method of internal combustion engine
First Claim
1. A control system of an internal combustion engine having a valve mechanism able to change a valve opening characteristic of at least one of an intake valve and exhaust valve and burning an air-fuel mixture comprised of fuel and air inside a combustion chamber to generate power, characterized by being provided witha cylinder pressure detecting means for detecting a cylinder pressure at said combustion chamber andan intake air calculating means for calculating an amount of air sucked into said combustion chamber based on an intake air pressure during valve overlap between said intake valve and said exhaust valve, an exhaust gas pressure during valve overlap, a cylinder pressure during the compression stroke detected by said cylinder pressure detecting means, and a gas passage effective area during said valve overlap.
1 Assignment
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Accused Products
Abstract
An internal combustion engine (1) provided with a valve mechanism (VM) able to change a valve opening characteristic of at least one of an intake valve (Vi) and exhaust valve (Ve), a cylinder pressure sensor (15) for detecting a cylinder pressure in a combustion chamber (3), and an ECU (20), wherein the ECU (20) calculates the amount of air sucked into the combustion chamber (3) based on an intake air pressure during valve overlap between the intake valve (Vi) and the exhaust valve (Ve), the exhaust gas pressure during valve overlap, a cylinder pressure during the compression stroke detected by a cylinder sensor (15), and a gas passage effective area during valve overlap.
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Citations
11 Claims
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1. A control system of an internal combustion engine having a valve mechanism able to change a valve opening characteristic of at least one of an intake valve and exhaust valve and burning an air-fuel mixture comprised of fuel and air inside a combustion chamber to generate power, characterized by being provided with
a cylinder pressure detecting means for detecting a cylinder pressure at said combustion chamber and an intake air calculating means for calculating an amount of air sucked into said combustion chamber based on an intake air pressure during valve overlap between said intake valve and said exhaust valve, an exhaust gas pressure during valve overlap, a cylinder pressure during the compression stroke detected by said cylinder pressure detecting means, and a gas passage effective area during said valve overlap.
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11. A control method of an internal combustion engine having a valve mechanism able to change a valve opening characteristic of at least one of an intake valve and exhaust valve and burning an air-fuel mixture comprised of fuel and air inside a combustion chamber to generate power, characterized by
calculating the amount of air sucked into the combustion chamber based on an intake air pressure during valve overlap between said intake valve and said exhaust valve, an exhaust gas pressure during valve overlap, a cylinder pressure at said combustion chamber during a compression stroke of said internal combustion engine, and a gas passage effective area during said valve overlap.
Specification