ENGINE CONTROL APPARATUS AND METHOD
First Claim
1. A non-transitory computer-readable storage medium storing an engine control program for causing a processor to execute a process, comprising:
- obtaining a setting value of an injection quantity to an engine having an Exhaust Gas Recirculator (EGR) and a Variable Nozzle Turbo (VNT), a setting value of an engine speed, a measurement value of a Manifold Air Pressure (MAP) of said engine and a measurement value of a Mass Air Flow (MAF) of said engine;
first calculating, for a nozzle opening degree of said VNT and a valve opening degree of said EGR, dynamic feedforward amounts for realizing a predetermined transient response characteristic by compensating a transient response characteristic of said engine, wherein said transient response characteristic of said engine responds to either of said setting value of said injection quantity and target values of said MAF and said MAP, which correspond to said setting values of said injection quantity and said engine speed; and
second calculating command values of said nozzle opening degree of said VNT and said valve opening degree of said EGR from control amounts of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which are calculated from said target values of said MAP and said MAF and said measurement values of said MAP and said MAF, target values of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which correspond to said setting values of said injection quantity and said engine speed, and said dynamic feedforward amounts for said nozzle opening degree of said VNT and said valve opening degree of said EGR.
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Accused Products
Abstract
A dynamic feedforward amount to realize a predetermined transient response characteristic by compensating a transient response characteristic of an engine having a Variable Nozzle Turbo (VNT) and an Exhaust Gas Recirculator (EGR) is calculated for a nozzle opening degree of the VNT and a valve opening degree of the EGR. The transient response characteristic of the engine responds to a setting value of an injection quantity or the like. Then, command values of the nozzle opening degree of the VNT and the valve opening degree of the EGR are calculated by using the dynamic feedforward amount. In the transient state, the followingness to the target value is improved.
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Citations
7 Claims
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1. A non-transitory computer-readable storage medium storing an engine control program for causing a processor to execute a process, comprising:
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obtaining a setting value of an injection quantity to an engine having an Exhaust Gas Recirculator (EGR) and a Variable Nozzle Turbo (VNT), a setting value of an engine speed, a measurement value of a Manifold Air Pressure (MAP) of said engine and a measurement value of a Mass Air Flow (MAF) of said engine; first calculating, for a nozzle opening degree of said VNT and a valve opening degree of said EGR, dynamic feedforward amounts for realizing a predetermined transient response characteristic by compensating a transient response characteristic of said engine, wherein said transient response characteristic of said engine responds to either of said setting value of said injection quantity and target values of said MAF and said MAP, which correspond to said setting values of said injection quantity and said engine speed; and second calculating command values of said nozzle opening degree of said VNT and said valve opening degree of said EGR from control amounts of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which are calculated from said target values of said MAP and said MAF and said measurement values of said MAP and said MAF, target values of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which correspond to said setting values of said injection quantity and said engine speed, and said dynamic feedforward amounts for said nozzle opening degree of said VNT and said valve opening degree of said EGR. - View Dependent Claims (2, 3, 4, 5)
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6. An engine control method, comprising:
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obtaining a setting value of an injection quantity to an engine having an Exhaust Gas Recirculator (EGR) and a Variable Nozzle Turbo (VNT), a setting value of an engine speed, a measurement value of a Manifold Air Pressure (MAP) of said engine and a measurement value of a Mass Air Flow (MAF) of said engine; first calculating, for a nozzle opening degree of said VNT and a valve opening degree of said EGR, dynamic feedforward amounts for realizing a predetermined transient response characteristic by compensating a transient response characteristic of said engine, wherein said transient response characteristic of said engine responds to either of said setting value of said injection quantity and target values of said MAF and said MAP, which correspond to said setting values of said injection quantity and said engine speed; and second calculating command values of said nozzle opening degree of said VNT and said valve opening degree of said EGR from control amounts of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which are calculated from said target values of said MAP and said MAF and said measurement values of said MAP and said MAF, target values of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which correspond to said setting values of said injection quantity and said engine speed, and said dynamic feedforward amounts for said nozzle opening degree of said VNT and said valve opening degree of said EGR.
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7. An engine control apparatus, comprising:
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a data obtaining unit to obtain a setting value of an injection quantity to an engine having an Exhaust Gas Recirculator (EGR) and a Variable Nozzle Turbo (VNT), a setting value of an engine speed, a measurement value of a Manifold Air Pressure (MAP) of said engine and a measurement value of a Mass Air Flow (MAF) of said engine; a dynamic feedforward amount calculation unit to calculate, for a nozzle opening degree of said VNT and a valve opening degree of said EGR, dynamic feedforward amounts for realizing a predetermined transient response characteristic by compensating a transient response characteristic of said engine, wherein said transient response characteristic of said engine responds to either of said setting value of said injection quantity and target values of said MAF and said MAP, which correspond to said setting values of said injection quantity and said engine speed; and a command value calculation unit to calculate command values of said nozzle opening degree of said VNT and said valve opening degree of said EGR from control amounts of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which are calculated from said target values of said MAP and said MAF and said measurement values of said MAP and said MAF, target values of said valve opening degree of said EGR and said nozzle opening degree of said VNT, which correspond to said setting values of said injection quantity and said engine speed, and said dynamic feedforward amounts for said nozzle opening degree of said VNT and said valve opening degree of said EGR.
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Specification