Methods and system for adjusting cylinder air charge of an engine
First Claim
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1. An engine operating method, comprising:
- injecting a first amount of fuel to a cylinder during a cycle of the cylinder in response to an open loop estimate of a cylinder air charge, wherein the open loop estimate of the cylinder air charge is a function of a first cylinder to fire since a most recent engine stop and an actual total number of combustion events since the most recent engine stop.
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Abstract
Systems and methods for operating an internal combustion engine based on output of an intake manifold pressure sensor and output of an in cylinder pressure sensor are described. The systems and methods provide a way of determining cylinder air charge so that a fuel injector has sufficient time to provide a desired amount of fuel to a cylinder during a cycle of the cylinder.
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Citations
14 Claims
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1. An engine operating method, comprising:
injecting a first amount of fuel to a cylinder during a cycle of the cylinder in response to an open loop estimate of a cylinder air charge, wherein the open loop estimate of the cylinder air charge is a function of a first cylinder to fire since a most recent engine stop and an actual total number of combustion events since the most recent engine stop. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An engine operating method, comprising:
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injecting a first amount of fuel to a cylinder during a cycle of the cylinder in response to a first cylinder air charge estimate, the first cylinder air charge estimate based on a scalar, wherein the scalar is a function of a first cylinder to fire since a most recent engine stop and an actual total number of combustion events since the most recent engine stop; and adjusting the scalar in response to a second cylinder air charge estimate for the cylinder. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification