Control device for internal combustion engine and control method for internal combustion engine
AssigneeHitachi Astemo, Ltd.
InventorsRyutaro Koiwai, Osamu Mukaihara, Kazuhiro Oryoji
Life of this patent
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Abstract
An intake air flow rate into an intake passage is detected with an internal combustion engine as a control device, and atmospheric pressure and temperature are estimated or detected. An intake passage internal average pressure and an intake passage internal average temperature in a region up to a throttle valve of the intake passage as one region are estimated. Distributions of a pressure and a temperature inside the intake passage are estimated based on the estimated intake passage internal average pressure, the intake passage internal average temperature, and a model of energy change caused by a constituent element included in the intake passage.
Claims15
A control device for an internal combustion engine, comprising:
- an intake air flow rate acquisition unit that detects an intake air flow rate into an intake passage;
- an atmospheric pressure acquisition unit that estimates or detects a pressure of atmosphere;
- an atmospheric temperature acquisition unit that estimates or detects a temperature of atmosphere;
- an intake passage internal average pressure estimation unit that estimates an intake passage internal average pressure in an intake passage having a region up to a throttle valve of the intake passage as one region;
- an intake passage internal average temperature estimation unit that estimates an intake passage internal average temperature in a passage having a region up to a throttle valve of the intake passage as one region;
- and
- a spatial distribution estimation unit that estimates distributions of pressure and temperature inside the intake passage based on an intake passage internal average pressure estimated by the intake passage internal average pressure estimation unit, an intake passage internal average temperature estimated by the intake passage internal average temperature estimation unit, and a model of energy change caused by a constituent element included in the intake passage.
A control device for an internal combustion engine, comprising:
- an intake passage internal gas mass estimation unit that estimates a mass of a gas in an intake passage having a region up to a throttle valve of an intake passage as one region;
- an intake passage internal gas energy estimation unit that estimates an energy of a gas in an intake passage having a region up to a throttle valve of an intake passage as one region;
- and
- a spatial distribution estimation unit that estimates distributions of a pressure and a temperature based on an intake passage internal gas mass estimated by the intake passage internal gas mass estimation unit, and an intake passage internal gas energy estimated by the intake passage internal gas energy estimation unit, and a model of energy change caused by a constituent element included in an intake passage.
A control method for an internal combustion engine, comprising:
- intake air flow rate acquisition processing of detecting an intake air flow rate into an intake passage;
- atmospheric pressure acquisition processing of estimating or detecting a pressure of atmosphere;
- atmospheric temperature acquisition processing of estimating or detecting a temperature of atmosphere;
- intake passage internal average pressure estimation processing of estimating an intake passage internal average pressure in an intake passage having a region up to a throttle valve of the intake passage as one region;
- an intake passage internal average temperature estimation processing of estimating an intake passage internal average temperature in an intake passage having a region up to a throttle valve of the intake passage as one region;
- and
- spatial distribution estimation processing of estimating distributions of pressure and temperature inside the intake passage based on an intake passage internal average pressure estimated by the intake passage internal average pressure estimation processing, an intake passage internal average temperature estimated by the intake passage internal average temperature estimation processing, and a model of energy change caused by a constituent element included in the intake passage.
Dependencies are inferred from the claim text.