Method for determining pneumatic states in an internal combustion engine system
First Claim
1. A method for determining pneumatic states in an internal combustion engine system, the internal combustion engine system including a plurality of pneumatic elements having gas flow ports and a plurality of pneumatic flow branches for coupling gas flow between various ones of the plurality of pneumatic elements, the method comprising:
- designating at least one location in the internal combustion engine system as a pneumatic node;
providing respective sets of pneumatic parameters associated with selected ones of said plurality of pneumatic elements that are coupled to said at least one pneumatic node; and
determining a first pneumatic state at said at least one pneumatic node from a set of predetermined relationships of said respective sets of pneumatic parameters.
1 Assignment
0 Petitions
Accused Products
Abstract
An internal combustion engine system includes a plurality of pneumatic elements including pneumatic resistances, pneumatic capacitances, and pneumatic sources. A pneumatic state model determines a pressure rate of change and pressure for certain areas of the internal combustion engine system designated as pneumatic nodes from selected flows of gas mass associated with pneumatic elements coupled to the certain areas.
75 Citations
25 Claims
-
1. A method for determining pneumatic states in an internal combustion engine system, the internal combustion engine system including a plurality of pneumatic elements having gas flow ports and a plurality of pneumatic flow branches for coupling gas flow between various ones of the plurality of pneumatic elements, the method comprising:
-
designating at least one location in the internal combustion engine system as a pneumatic node; providing respective sets of pneumatic parameters associated with selected ones of said plurality of pneumatic elements that are coupled to said at least one pneumatic node; and determining a first pneumatic state at said at least one pneumatic node from a set of predetermined relationships of said respective sets of pneumatic parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A method of determining pneumatic states in an internal combustion engine system, the internal combustion engine system including a plurality of pneumatic elements having gas flow ports and a plurality of pneumatic flow branches for coupling gas flow between various ones of the plurality of pneumatic elements, the internal combustion engine system being effective to controllably circulate gas masses therethrough, the method comprising the steps:
-
designating a plurality of locations the internal combustion engine system as respective pneumatic nodes; for each respective pneumatic node; providing respective sets of pneumatic parameters associated with selected ones of said plurality of pneumatic elements that are coupled to the respective pneumatic node; determining respective gas mass flows through each of said selected ones of said plurality of pneumatic elements as a respective predetermined function of each respective set of pneumatic parameters; aggregating said respective gas mass flows to establish a net gas mass flow; determining pressure changes with respect to predetermined intervals from said net gas mass flow; and determining pressure as a predetermined integral function of said pressure changes. - View Dependent Claims (22, 23)
-
-
24. A method of determining pressure at predetermined areas within an internal combustion engine, each predetermined area being coupled to a respective plurality of pneumatic elements, the method comprising the steps:
-
estimating all significant gas mass flows into and out of each predetermined area from respective sets of pneumatic parameters associated with the respective plurality of pneumatic elements coupled to each area; for each predetermined area, summing respective estimated significant gas mass flows; and determining pressure at each predetermined area as a predetermined function of the respective summations of said estimated gas mass flows. - View Dependent Claims (25)
-
Specification