CYLINDER PRESSURE MEASUREMENT SYSTEM AND METHOD
First Claim
1. An engine control system comprising:
- a piston movement modeling module that models movement of a piston within a corresponding cylinder based on angular change of an engine crankshaft;
a cylinder volume determination module that determines a volume of the cylinder based on an angular position of the engine crankshaft and the modeled movement of the piston; and
a cylinder pressure estimation module that estimates pressure in the cylinder based on the determined volume, an intake manifold absolute pressure (MAP), an intake valve timing, an exhaust valve timing, and an exhaust back pressure (EBP).
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Abstract
An engine control system includes a piston movement modeling module, a cylinder volume determination module, and a cylinder pressure estimation module. The piston movement modeling module models movement of a piston within a corresponding cylinder based on angular change of an engine crankshaft. The cylinder volume determination module determines a volume of the cylinder based on an angular position of the engine crankshaft and the modeled movement of the piston. The cylinder pressure estimation module estimates pressure in the cylinder based on the determined volume, an intake manifold absolute pressure (MAP), an intake valve timing, an exhaust valve timing, and an exhaust back pressure (EBP).
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Citations
20 Claims
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1. An engine control system comprising:
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a piston movement modeling module that models movement of a piston within a corresponding cylinder based on angular change of an engine crankshaft; a cylinder volume determination module that determines a volume of the cylinder based on an angular position of the engine crankshaft and the modeled movement of the piston; and a cylinder pressure estimation module that estimates pressure in the cylinder based on the determined volume, an intake manifold absolute pressure (MAP), an intake valve timing, an exhaust valve timing, and an exhaust back pressure (EBP). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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modeling movement of a piston within a corresponding cylinder based on angular change of an engine crankshaft; determining a volume of the cylinder based on an angular position of the engine crankshaft and the modeled movement of the piston; and estimating pressure in the cylinder based on the determined volume, an intake manifold absolute pressure (MAP), an intake valve timing, an exhaust valve timing, and an exhaust back pressure (EBP). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification