Cylinder air charge estimation assembly
AssigneeFord Global Tech., Inc.
InventorsRoss Dykstre Pursifull, Allan Joseph Kotwicki
Life of this patent
Estimating the term…
Abstract
An cylinder air charge estimation assembly 12 for use with an internal combustion engine 10 having at least one cylinder 14. Assembly 12 dynamically estimates the amount of air contained within the at least cylinder 14 of the engine 10 by the dynamic use of one of two unique air charge estimation techniques.
Claims20
An assembly for use in combination with a vehicle of the type having an engine which operates at a certain speed and which includes at least one cylinder which operably contains air, a selectively positionable throttle which selectively moves by a certain amount, and an intake manifold, said assembly comprising:
- a controller which estimates said amount of air contained within said at least one cylinder by using a position of said throttle and said pressure within said intake manifold when said certain amount is less than a certain value.
An assembly for use with an engine of the type having at least one cylinder which operably contains a certain amount of air, said assembly comprising:
- a controller;
- a first sensor which is coupled to said controller and which selectively provides certain first information to said controller;
- a second sensor which is coupled to said controller and which selectively provides certain second information to said controller;
- and
- a third sensor which is coupled to said controller and which selectively provides certain third information to said controller, said certain third information being selectively used by said controller in combination with said certain first information to estimate said certain amount of air by a first technique, said certain third information being selectively used by said controller in combination with said certain second information to estimate said certain amount of air by a second technique, and said third information having a value which is used by said controller to select only one of said first and second techniques.
A method for estimating the amount of air contained within a cylinder of an engine, said engine selectively operating at a certain speed and being of the type having a throttle which selectively occupies a certain selectable position and having an intake manifold which has a certain pressure, said method comprising the steps of:
- measuring the speed of said engine;
- measuring the position of said throttle;
- providing a first and second air estimating technique;
- selecting one of said first and second air estimating techniques by use of said measured engine speed and said measured throttle position;
- and
- estimating the amount of said air contained within said cylinder by use of said selected one of the first and second air estimating techniques.
Dependencies are inferred from the claim text.