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US 6,868,668 B2Granted
Internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorMakoto Suzuki
Life of this patent
Estimating the term…
Abstract
Disclosed is an internal combustion engine which is to be mounted on automobiles or the like and in which an improvement has been achieved in terms of startability and combustion stability during warm-up operation. In an internal combustion engine of the type in which gas discharged from a combustion heater is introduced into an intake passage of the internal combustion engine, a fuel vaporizing glow plug is operated during the period from the starting of the internal combustion engine to the occurrence of complete explosion, whereby unburned vaporized fuel is supplied from the combustion heater to the internal combustion engine.
Claims28
An internal combustion engine comprising:
- a combustion heater including:
- fuel ignition means for supplying a combustion gas;
- and
- fuel vaporizing means for vaporizing a fuel through heating for supplying a vaporized fuel;
- the internal combustion engine further comprising operation control means to control the combustion heater to selectively supply one of the combustion gas or the vaporized fuel to one of an exhaust passage or an intake passage of the internal combustion engine based on an operating condition of the internal combustion engine.
2 more elements
An internal combustion engine comprising:
- an exhaust gas purifying catalyst arranged in an exhaust passage of the internal combustion engine;
- fuel vaporizing means for vaporizing fuel through heating;
- vaporized fuel supply means for supplying the fuel vaporized by
- the fuel vaporizing means to an upstream side of the exhaust gas purifying catalyst in the exhaust passage without any burning of the fuel;
- fuel ignition means for supplying a combustion gas;
- and
- operation control means adapted to selectively supply one of the vaporized fuel or the combustion gas to one of the exhaust passage or an intake passage of the internal combustion engine based on an operating condition of the internal combustion engine.
4 more elements
An internal combustion engine comprising:
- a combustion heater equipped with a combustion chamber independent of the internal combustion engine;
- gas supply means for supplying gas within the combustion chamber to an intake passage of the internal combustion engine;
- and
- operation control means which is adapted to control the combustion heater so as to vaporize fuel supplied to the combustion chamber at least during a period until occurrence of complete explosion in the internal combustion engine without any burning of the fuel, and, at the same time, is adapted to control the gas supply means so as to supply the vaporized fuel in the combustion chamber to the intake passages;
- and wherein the operation control means is further adapted to control the combustion heater to selectively supply one of the vaporized fuel or a combustion gas to one of an exhaust passage or an intake passage of the internal combustion engine based on an operating condition of the internal combustion engine.
2 more elements
An internal combustion engine comprising:
- a combustion heater equipped with a combustion chamber independent of the internal combustion engine;
- gas supply means for supplying gas in the combustion chamber to a position on an upstream side of exhaust gas purifying catalysts in an exhaust passage of the internal combustion engine;
- and
- operation control means which is adapted to control the combustion heater so as to vaporize fuel supplied to the combustion chamber when it is necessary to supply reducing agent to the exhaust gas purifying catalyst, without any burning of the fuel, and, at the same time, is adapted to control the gas supply means so as to supply the vaporized fuel in the combustion chamber to the exhaust passage on the upstream side of exhaust gas purifying catalysts;
- and wherein the operation control means is further adapted to control the combustion heater to selectively supply one of the vaporized fuel or a combustion gas to one of the exhaust passage or an intake passage of the internal combustion engine based on an operating condition of the internal combustion engine.
2 more elements
An internal combustion engine comprising:
- a combustion heater equipped with a combustion chamber independent of the internal combustion engine;
- gas supply means for selectively supplying gas from the combustion chamber to a portion on an upstream side of exhaust gas purifying catalysts in an exhaust passage of the internal combustion engine or to an intake passage of the internal combustion engine;
- and
- operation control means which is adapted to control the combustion heater so as to vaporize fuel supplied to the combustion chamber at least during a period until occurrence of complete explosion in the internal combustion engine, without any burning of the fuel, and, at the same time, is further adapted to control the gas supply means so as to supply the vaporized fuel in the combustion chamber to the intake passage, and which is further adapted to control the combustion heater so as to vaporize the fuel supplied to the combustion chamber when it is necessary to supply a reducing agent to the exhaust gas purifying catalyst, without any burning of the fuel and, at the same time, is adapted to control the gas supply means so as to supply the vaporized fuel in the combustion chamber to the exhaust passage;
- and wherein the operation control means is further adapted to control the combustion heater to selectively supply one of the vaporized fuel or a combustion gas to one of the exhaust passage or an intake passage of the internal combustion engine based on an operating condition of the internal combustion engine.
2 more elements
An internal combustion engine comprising:
- a combustion heater equipped with a combustion chamber independent of the internal combustion engine;
- gas supply means for selectively supplying gas from the combustion chamber to a portion on an upstream side of exhaust gas purifying catalysts in an exhaust passage of the internal combustion engine or to an intake passage of the integral combustion engine;
- and
- operation control means which, at least during a period from a start to warm-up completion of the internal combustion engine, is adapted to control the combustion heater so as to vaporize fuel supplied to the combustion chamber without any burning of the fuel and, at the same time, is adapted to control the gas supply means so as to supply the vaporized fuel in the combustion chamber to the intake passage and the exhaust passage;
- and wherein the operation control means is further adapted to control the combustion heater to selectively supply one of the vaporized fuel or a combustion gas to one of the exhaust passage or the intake passage of the internal combustion engine based on an operating condition of the internal combustion engine.
2 more elements
Dependencies are inferred from the claim text.