Method and apparatus for combustion chamber pressure estimation
AssigneeDenso Corporation
InventorsMiles Howard, Michaela Walford
Life of this patent
Estimating the term…
Abstract
In order to compensate for pressure drop across a fuel injector, pressure in a combustion chamber of an internal combustion engine into which fuel is injected is estimated based on manifold pressure at a timing for intake valve closure and volumes of the combustion chamber at a timing for intake valve closure and at least one other timing.
Claims22
A method of estimating a pressure in a combustion chamber of an internal combustion engine into which fuel is injected by a fuel injector, the method comprising estimating the pressure based on manifold pressure at a timing corresponding to intake valve closure and volumes of the combustion chamber at a timing corresponding to intake valve closure and at least one other timing.
A method of adjusting an injection pulse width during which a fuel injector is open for injecting fuel to a combustion chamber of an internal combustion engine, the method comprising applying a pressure compensation to a fuel supply pressure based on an estimated combustion chamber pressure, the estimated combustion chamber pressure being computed based on a manifold pressure at a timing corresponding to intake valve closure and volumes of the combustion chamber at a timing corresponding to intake valve closure and at least one other timing.
An engine control unit comprising a processor which executes pressure estimating logic to estimate pressure in a combustion chamber of a cylinder of an internal combustion engine into which fuel is injected, including estimating the pressure based on manifold pressure at a timing corresponding to intake valve closure and volumes of the combustion chamber at a timing corresponding to intake valve closure and at least one other timing.
An internal combustion engine system comprising:
- an internal combustion engine having at least one combustion chamber;
- and
- an engine control unit, the engine control unit comprising pressure estimating logic which is, upon execution by a processor, operable to estimate pressure in the combustion chamber of the internal combustion engine into which fuel is injected, the method pressure estimating logic being operable to estimate the pressure based on manifold pressure at a timing corresponding to intake valve closure and volumes of the combustion chamber at a timing corresponding to intake valve closure and at least one other timing.
A computer readable storage medium tangibly storing computer readable program code which, upon execution by a computer, enables the computer to estimate pressure in a combustion chamber of an internal combustion engine into which fuel is injected, wherein the pressure is estimated based on manifold pressure at a timing corresponding to intake valve closure and volumes of the combustion chamber at a timing corresponding to intake valve closure and at least one other timing.
Dependencies are inferred from the claim text.