IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0019608
(2001-12-28)
|
우선권정보 |
SE-9902491 (1999-06-30) |
국제출원번호 |
PCT/SE00/01379
(2000-06-29)
|
국제공개번호 |
WO01/00981
(2001-01-04)
|
발명자
/ 주소 |
- Grandin, B{overscore (o)}rje
|
출원인 / 주소 |
|
대리인 / 주소 |
Ostrolenik, Faber, Gerb & Soffen, LLP
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인용정보 |
피인용 횟수 :
95 인용 특허 :
5 |
초록
▼
A combustion engine having an exhaust-gas driven turbo compressor is provided with a device for recirculating exhaust gases to the engine, this device being connected to the exhaust system of the engine upstream of the turbo compressor and being provided with a cooling device for the recirculated ex
A combustion engine having an exhaust-gas driven turbo compressor is provided with a device for recirculating exhaust gases to the engine, this device being connected to the exhaust system of the engine upstream of the turbo compressor and being provided with a cooling device for the recirculated exhaust gases. The engine is provided with at least two exhaust valves per cylinder and has divided exhaust gas flow, each cylinder being connected by a first exhaust valve to a first exhaust collector, which leads to the turbine of the turbo compressor, and each cylinder being connected by a second exhaust valve to a second exhaust collector, which is connected to the exhaust system of the engine downstream of the turbine. The second exhaust collector forms part of the device for recirculating exhaust gases to the engine and is also connected to the inlet of the engine.
대표청구항
▼
1. A combustion engine, comprising: an inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginni
1. A combustion engine, comprising: an inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginning of an exhaust stroke of the cylinder and a second exhaust valve operable to open at an end of the exhaust stroke of the cylinder; first and second exhaust collectors coupled to the first and second exhaust valves, respectively, for receiving exhaust gases from the cylinders; an exhaust-gas-driven turbo compressor coupled to the first exhaust collector for supercharging the engine; and a recirculating device for recirculating the exhaust gases, the recirculating device including a cooling device coupled to the second exhaust collector for cooling the exhaust gases and coupled to the inlet of the engine to permit the cooled exhaust gas to recirculate into the cylinders through the intake valves; the recirculating device further including a first control valve for regulating a quantity of the recirculated exhaust gases from the second exhaust collector, the cooling device being coupled to the second exhaust collector via the first control valve, wherein the first control valve is operable to be opened under a high engine load and operable to remain closed below a high engine load. 2. The combustion engine according to claim 1, further comprising an exhaust pipe coupled to and arranged downstream of the exhaust-gas-driven turbo compressor and a second control valve disposed in a connection between the second exhaust collector and the exhaust pipe.3. The combustion engine according to claim 2, wherein the second control valve is operable to be closed under low and high engine loads and operable to be open between low and high engine loads.4. The combustion engine according to claim 1, further comprising a throttle valve positioned within the inlet, the recirculating device being connected to the inlet of the engine upstream of the throttle valve.5. A combustion engine, comprising: an inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginning of an exhaust stroke of the cylinder and a second exhaust valve operable to open at an end of the exhaust stroke of the cylinder; first and second exhaust collectors coupled to the first and second exhaust valves, respectively, for receiving exhaust gases from the cylinders; an exhaust-gas-driven turbo compressor coupled to the first exhaust collector for supercharging the engine; a recirculating device for recirculating the exhaust gases, the recirculating device including a cooling device coupled to the second exhaust collector for cooling the exhaust gases and coupled to the inlet of the engine to permit the cooled exhaust gas to recirculate into the cylinders through the intake valves; the recirculating device further including a first control valve for regulating a quantity of the recirculated exhaust gases from the second exhaust collector, the cooling device being coupled to the second exhaust collector via the first control valve; an exhaust pipe coupled to and arranged downstream of the exhaust-gas-driven turbo compressor; and a second control valve arranged between the second exhaust collector and the exhaust pipe downstream of the exhaust-gas-driven turbo compressor. 6. The combustion engine according to claim 5, wherein the second control valve is operable to be closed under low and high engine loads and operable to be open between low and high engine loads.7. The combustion engine according to claim 6, wherein the second control valve is operable to be open only when a pressure in the inlet of the engine is from about 80-110 kPa.8. The combustion engine acco rding to claim 5, further comprising a throttle valve positioned within the inlet, the recirculating device being connected to the inlet of the engine upstream of the throttle valve.9. The combustion engine according to claim 6, further comprising a throttle valve positioned within the inlet, the recirculating device being connected to the inlet of the engine upstream of the throttle valve.10. The combustion engine according to claim 7, further comprising a throttle valve positioned within the inlet, the recirculating device being connected to the inlet of the engine upstream of the throttle valve.11. A combustion engine, comprising: an inlet; a throttle valve positioned within the inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginning of an exhaust stroke of the cylinder and a second exhaust valve operable to open at an end of the exhaust stroke of the cylinder; first and second exhaust collectors coupled to the first and second exhaust valves, respectively, for receiving exhaust gases from the cylinders; an exhaust-gas-driven turbo compressor coupled to the first exhaust collector for supercharging the engine; and a recirculating device for recirculating the exhaust gases, the recirculating device including a cooling device coupled to the second exhaust collector for cooling the exhaust gases and coupled to the inlet of the engine to permit the cooled exhaust gas to recirculate into the cylinders through the intake valves, the recirculating device being connected to the inlet of the engine upstream of the throttle valve. 12. A combustion engine, comprising: an inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginning of an exhaust stroke of the cylinder and a second exhaust valve operable to open at an end of the exhaust stroke of the cylinder; first and second exhaust collectors coupled to the first and second exhaust valves, respectively, for receiving exhaust gases from the cylinders; an exhaust-gas-driven turbo compressor coupled to the first exhaust collector for supercharging the engine; and a recirculating device for recirculating the exhaust gases, the recirculating device including a cooling device coupled to the second exhaust collector for cooling the exhaust gases and coupled to the inlet of the engine to permit the cooled exhaust gas to recirculate into the cylinders through the intake valves; wherein the exhaust valves have assigned thereto respective mutually variable valve times for regulating a quantity of the recirculated exhaust gases. 13. The combustion engine according to claim 12, wherein the respective mutually variable valve times of the exhaust valves are variable as a function of engine load.14. A combustion engine, comprising: an inlet; a throttle valve positioned within the inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginning of an exhaust stroke of the cylinder and a second exhaust valve operable to open at an end of the exhaust stroke of the cylinder; first and second exhaust collectors coupled to the first and second exhaust valves, respectively, for receiving exhaust gases from the cylinders; an exhaust-gas-driven turbo compressor coupled to the first exhaust collector for supercharging the engine; and a recirculating device for recirculating the exhaust gases, the recirculating device including a cooling device coupled to the second exhaust col lector for cooling the exhaust gases and coupled to the inlet of the engine to permit the cooled exhaust gas to recirculate into the cylinders through the intake valves, wherein the recirculating device is connected to the inlet of the engine upstream of the throttle valve. 15. A combustion engine, comprising: an inlet; a plurality of cylinders, each of the cylinders including at least one intake valve coupled to the inlet and at least two exhaust valves for divided exhaust gas flow, the exhaust valves including a first exhaust valve operable to open at the beginning of an exhaust stroke of the cylinder and a second exhaust valve operable to open at an end of the exhaust stroke of the cylinder; first and second exhaust collectors coupled to the first and second exhaust valves, respectively, for receiving exhaust gases from the cylinders; an exhaust-gas-driven turbo compressor coupled to the first exhaust collector for supercharging the engine; and a recirculating device for recirculating the exhaust gases, the recirculating device including a cooling device coupled to the second exhaust collector for cooling the exhaust gases and coupled to the inlet of the engine to permit the cooled exhaust gas to recirculate into the cylinders through the intake valves. 16. The combustion engine according to claim 15, wherein the recirculating device includes a first control valve for regulating a quantity of the recirculated exhaust gases from the second exhaust collector, the cooling device being coupled to the second exhaust collector via the first control valve.
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