Title:
【発明の名称】シリンダの空気流量を予測する方法
Document Type and Number:
Japanese Patent JPH081149
Kind Code:
B2
Abstract:
A delta model is used to calculate a predicted manifold absolute pressure (MAP) for a future period and the air mass induced in each cylinder is calculated from such a predicted value and used to determine the correct amount of fuel to inject at that period. Several reference pulses generated for each crankshaft revolution establish one or more sets of equally spaced points (62-72) at which measurements are made of the parameters manifold absolute pressure (MAP), throttle position (TPS), exhaust gas recirculation (EGR) and idle air control (IAC). A base value of manifold absolute pressure (MAP) is calculated, trends of changes in the parameters are calculated for each set of points, and weighted values of the trends are summed with the base manifold absolute pressure value to predict a value of (MAP). Alternatively, mass air flow (MAF) is measured as well as the other parameters and mass air per cylinder (MAC) is calculated. Then a base value of mass air per cylinder (MAC) is calculated, trends of changes in the parameters are calculated for each set of points, and weighted values of the trends are summed with the base mass air per cylinder value to predict a value of mass air induced into a cylinder.
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Inventors:
Dar-Rhein Tan
Application Number:
JP23667293A
Publication Date:
January 10, 1996
Filing Date:
September 22, 1993
Export Citation:
Assignee:
GENERAL MOTORS CORPORATION
International Classes:
F02D41/04; F02D41/18; F02D41/32; F02D45/00; (IPC1-7): F02D45/00; F02D41/18
Domestic Patent References:
| JP1290950A | ||||
| JP1315635A | ||||
| JP2157451A | ||||
| JP3210043A | ||||
| JP4259641A |
Attorney, Agent or Firm:
Kyozo Yuasa (6 people outside)
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