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US 2003/0164151 A1Published application
In-cylinder injection type internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsToshimi Kashiwagura, Masaharu Ichise, Mutsumi Kanda, Takashi Hashima, Hiroshi Nomura
Life of this patent
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Abstract
An in-cylinder injection type internal combustion engine is provided, which first fires a first spark plug and thereafter fires a second spark plug when a required load is low and which first fires the second spark plug and thereafter fires the first spark plug when the required load is high.
Claims28
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly into the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a plurality of ignitors arranged within the cylinder head with respect to the high and low concentration portions of the air-fuel mixture respectively;
- a load detector for detecting a load required of the in-cylinder injection type internal combustion engine;
- and
- an ignition controller which advances an ignition time of the ignitor arranged with respect to the high concentration portion of the air fuel mixture than an ignition time of the ignitor arranged with respect to the low concentration portion of the air-fuel mixture when a load detected by the load detector is low during stratified-charge combustion.
6 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly into the combustion chamber, which is disposed at a periphery of the combustion chamber and is adapted to inject the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a cavity that is formed on an upper surface of the piston and guides the air-fuel mixture formed of the fuel injected from the fuel injector and moving from a peripheral area to a central area of the combustion chamber to flow from the peripheral area to the central area of the combustion chamber along the cylinder head;
- a first ignitor disposed in a portion of the cylinder head facing the cavity;
- a second ignitor disposed in a portion of the cylinder head that is located in the vicinity of the fuel injector;
- and
- an ignition controller that is adapted to fire the first and second ignitors at the same time.
7 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly into the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- and
- a plurality of ignitors, each having a different length of a portion protruded out from the cylinder head.
4 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly towards a central area of the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a cavity that is formed on an upper surface of the piston and includes a wall portion for dispersing the air-fuel mixture formed of the fuel injected from the fuel injector towards a peripheral area of the combustion chamber;
- and
- a plurality of ignitors arranged within the cylinder head so as to be located in line with the wall portion.
5 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly towards a central area of the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a cavity that is formed on an upper surface of the piston and includes a wall portion for dispersing the air-fuel mixture formed of the fuel injected by the fuel injector from a first peripheral area to a second peripheral area of the combustion chamber;
- a plurality of ignitors arranged within the cylinder head so as to be located in line with the wall portion;
- a load detector for detecting a load required of the in-cylinder injection type internal combustion engine;
- and
- an ignition controller that fires an ignitor among the plurality of ignitors which is located in the vicinity of the first peripheral area of the combustion chamber when a load detected by the load detector is low and that fires another ignitor among the plurality of ignitors which is located in the vicinity of the second peripheral area of the combustion chamber when the load detected by the load detector is high during stratified-charge combustion.
7 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly towards a central area of the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a cavity that is formed on an upper surface of the piston and includes a wall portion for dispersing the air-fuel mixture formed of the fuel injected by the fuel injector from a first peripheral area to a second peripheral area of the combustion chamber;
- a plurality of ignitors arranged within the cylinder head so as to be located in line with the wall portion;
- a load detector for detecting a load required of the in-cylinder injection type internal combustion engine;
- and
- an ignition controller that fires the plurality of ignitors at an ignition time of an ignitor among the plurality of ignitors which is located in the vicinity of the first peripheral area of the combustion chamber when a load detected by the load detector is low and that fires the plurality of ignitors at an ignition time of another ignitor among the plurality of ignitors which is located in the vicinity of the second peripheral area of the combustion chamber when the load detected by the load detector is high during stratified-charge combustion.
7 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly towards a central area of the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a cavity that is formed on an upper surface of the piston and includes a wall portion for dispersing the air-fuel mixture formed of the fuel injected from the fuel injector from a first peripheral area to a second peripheral area of the combustion chamber;
- a plurality of ignitors arranged within the cylinder head so as to be located in line with the wall portion;
- a load detector for detecting a load required of the in-cylinder injection type internal combustion engine;
- and
- an ignition controller that fires the plurality of ignitors in order from the side of the first peripheral area to the side of the second peripheral area of the combustion chamber when a load detected by the load detector is low and that fires the plurality of ignitors in order from the side of the second peripheral area to the side of the first peripheral area of the combustion chamber when the load detected by the load detector is high during stratified-charge combustion.
7 more elements
An in-cylinder injection type internal combustion engine, comprising:
- a cylinder block;
- a cylinder head;
- a piston;
- a combustion chamber defined by the cylinder block, the cylinder head, and the piston;
- a fuel injector for injecting a fuel directly towards a central area of the combustion chamber, which injects the fuel such that high and low concentration portions of an air-fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- and
- a plurality of ignitors, each including an insulator having a streamline shape which matches with a flow of the air-fuel mixture formed of the fuel injected from the fuel injector.
4 more elements
An ignition control method of an in-cylinder injection type internal combustion engine including;
- a combustion chamber defined by a cylinder block, a cylinder head, and a piston;
- a fuel injector for injecting a fuel directly into the combustion chamber, which injects the fuel such that high and low concentration portions of an air fuel mixture are formed in the combustion chamber during stratified-charge combustion;
- a plurality of ignitors disposed in the cylinder head;
- and
- a load detector for detecting a load required of the in-cylinder injection type internal combustion engine, the ignition control method comprising steps of:
- determining whether stratified-charge combustion is being performed;
- detecting a load required of the in-cylinder injection type internal combustion engine when it is determined that stratified-charge combustion is being performed;
- and
- advancing an ignition time of an ignitor located in a portion of the cylinder head corresponding to the high concentration portion of the air-fuel mixture than an ignition time of another ignitor located in a portion of the cylinder head corresponding to the low concentration portion of the air-fuel mixture when the load detected by the load detector is low.
6 more elements
Dependencies are inferred from the claim text.