Control system for internal combustion engine
First Claim
1. A control system for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control system comprising:
- torque change detecting means for detecting a rapid change in a demand torque of said engine;
feedforward correction amount generating means for generating a feedforward correction amount during a correction period which is substantially equal to a resonance period of a powertrain of said vehicle, from a time when the rapid change in the demand torque is detected; and
feedforward torque correcting means for correcting an output torque control amount of said engine with the feedforward correction amount.
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Accused Products
Abstract
A control system for an internal combustion engine for driving a vehicle, which controls an output torque of the engine, is provided. In this control system, a rapid change in a demand torque of the engine is detected, and a feedforward correction amount is generated during a correction period which is substantially equal to a resonance period of a powertrain of the vehicle, from a time when the rapid change in the demand torque is detected. An output torque control amount of the engine is corrected with the feedforward correction amount. A torque change amount integrated value is calculated by integrating an amount of change in the demand torque, and the feedforward correction amount is generated according to the torque change amount integrated value.
44 Citations
26 Claims
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1. A control system for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control system comprising:
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torque change detecting means for detecting a rapid change in a demand torque of said engine; feedforward correction amount generating means for generating a feedforward correction amount during a correction period which is substantially equal to a resonance period of a powertrain of said vehicle, from a time when the rapid change in the demand torque is detected; and feedforward torque correcting means for correcting an output torque control amount of said engine with the feedforward correction amount. - View Dependent Claims (2, 3, 4)
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5. A control system for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control system comprising:
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rotational speed detecting means for detecting a rotational speed of said engine; high-pass filtering means for performing a high-pass filtering of the detected engine rotational speed, wherein a cutoff frequency of the high-pass filtering is set to a frequency lower than a resonance frequency of a powertrain of the vehicle; and feedback torque correcting means for correcting an output torque control amount of said engine in a feedback manner according to the high-pass filtered engine rotational speed. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A control system for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control system comprising:
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torque change detecting means for detecting a rapid change in a demand torque of said engine; feedforward correction amount generating means for generating a feedforward correction amount during a correction period which is substantially equal to a resonance period of a powertrain of said vehicle from a time when the rapid change in the demand torque is detected; feedforward torque correcting means for correcting a first output torque control amount of said engine with the feedforward correction amount; rotational speed detecting means for detecting a rotational speed of said engine; high-pass filtering means for performing a high-pass filtering of the detected engine rotational speed; and feedback torque correcting means for correcting a second output torque control amount of said engine in a feedback manner according to the high-pass filtered engine rotational speed.
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14. A control method for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control method comprising the steps of:
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a) detecting a rapid change in a demand torque of said engine; b) generating a feedforward correction amount during a correction period which is substantially equal to a resonance period of a powertrain of said vehicle, from a time when the rapid change in the demand torque is detected; and c) correcting an output torque control amount of said engine with the feedforward correction amount. - View Dependent Claims (15, 16, 17)
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18. A control method for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control method comprising the steps of:
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a) detecting a rotational speed of said engine; b) performing a high-pass filtering of the detected engine rotational speed, wherein a cutoff frequency of the high-pass filtering is set to a frequency lower than a resonance frequency of a powertrain of the vehicle; and c) correcting an output torque control amount of said engine in a feedback manner according to the high-pass filtered engine rotational speed. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A control method for an internal combustion engine for driving a vehicle, which controls an output torque of said engine, said control method comprising the steps of:
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a) detecting a rapid change in a demand torque of said engine; b) generating a feedforward correction amount during a correction period which is substantially equal to a resonance period of a powertrain of said vehicle from a time when the rapid change in the demand torque is detected; c) correcting a first output torque control amount of said engine with the feedforward correction amount; d) detecting a rotational speed of said engine; e) performing a high-pass filtering of the detected engine rotational speed; and f) correcting a second output torque control amount of said engine in a feedback manner according to the high-pass filtered engine rotational speed.
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Specification