Cylinder intake air quantity determination device
First Claim
1. A cylinder intake air quantity determination device comprising:
- a manifold internal air quantity calculation section configured to calculate a manifold internal air quantity based on a balance between an air quantity flowing into an intake manifold and an air quantity flowing out of the intake manifold;
a manifold internal pressure calculation section configured to calculate a manifold internal pressure based at least on the manifold internal air quantity;
a cylinder internal pressure calculation section configured to calculate a cylinder internal pressure based on at least one parameter that affects a vapor state inside a cylinder; and
a cylinder intake air quantity calculation section configured to calculate a cylinder intake air quantity based on the manifold internal pressure and the cylinder internal pressure.
1 Assignment
0 Petitions
Accused Products
Abstract
A cylinder intake air quantity determination device is configured to calculate a manifold internal air quantity based on an inflow air quantity and an outflow air quantity of an intake manifold. Then, a manifold internal pressure is calculated based on the manifold internal air quantity and an intake air temperature, and a cylinder internal pressure corresponding to a crank angle is calculated based on the previous cylinder intake air quantity. The cylinder intake air quantity is then calculated based on the manifold internal pressure, the cylinder internal pressure, and the intake air temperature. Thus, the cylinder intake air quantity determination device is configured to calculate the cylinder intake air quantity with a good precision.
20 Citations
14 Claims
-
1. A cylinder intake air quantity determination device comprising:
-
a manifold internal air quantity calculation section configured to calculate a manifold internal air quantity based on a balance between an air quantity flowing into an intake manifold and an air quantity flowing out of the intake manifold; a manifold internal pressure calculation section configured to calculate a manifold internal pressure based at least on the manifold internal air quantity; a cylinder internal pressure calculation section configured to calculate a cylinder internal pressure based on at least one parameter that affects a vapor state inside a cylinder; and a cylinder intake air quantity calculation section configured to calculate a cylinder intake air quantity based on the manifold internal pressure and the cylinder internal pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A cylinder intake air quantity determination device comprising:
-
manifold internal air quantity calculation means for calculating a manifold internal air quantity based on a balance between an air quantity flowing into an intake manifold and an air quantity flowing out of the intake manifold; manifold internal pressure calculation means for calculating a manifold internal pressure based at least on the manifold internal air quantity; cylinder internal pressure calculation means for calculating a cylinder internal pressure based on at least one parameter that affects a vapor state inside a cylinder; and cylinder intake air quantity calculation means for calculating a cylinder intake air quantity based on the manifold internal pressure and the cylinder internal pressure. - View Dependent Claims (12)
-
-
13. A method of determining a cylinder intake air quantity of an internal combustion engine comprising:
-
calculating a manifold internal air quantity based on a balance between an air quantity flowing into an intake manifold and an air quantity flowing out of the intake manifold; calculating a manifold internal pressure based at least on the manifold internal air quantity; calculating a cylinder internal pressure based on at least one parameter that affects a vapor state inside a cylinder; and calculating a cylinder intake air quantity based on the manifold internal pressure and the cylinder internal pressure. - View Dependent Claims (14)
-
Specification