Cooling circuit for a liquid-cooled internal combustion engine
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0625916
(2012-09-25)
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등록번호 |
US-8800503
(2014-08-12)
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우선권정보 |
DE-10 2011 116 933 (2011-10-26) |
발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
4 |
초록
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A cooling circuit for a liquid-cooled internal combustion engine for motor vehicles, includes a main cooling circuit including a feed line leading to a radiator and a return line, and a bypass line, which bypasses the radiator and can be controlled as a function of temperature and secondary cooling
A cooling circuit for a liquid-cooled internal combustion engine for motor vehicles, includes a main cooling circuit including a feed line leading to a radiator and a return line, and a bypass line, which bypasses the radiator and can be controlled as a function of temperature and secondary cooling circuit for a retarder of a braking device of the motor vehicle, which is connected, likewise by a feed line, a return line and a control valve, to the main cooling circuit. The two cooling circuits (2, 3) can be controlled by a single rotary slide valve (10). Both cooling circuits (2, 3) are interconnected in such a way that the flow rates thereof to the radiator (6) and/or to the retarder (4) can be varied in a predetermined or defined manner, in particular between 0% and 100%.
대표청구항
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1. A cooling circuit for a liquid-cooled internal combustion engine for a motor vehicle comprising: a main cooling circuit (2) including a radiator (6);a feed line (5) leading to said radiator (6); and a return line (7) leading away from said radiator (6);a bypass line (9) bypassing said radiator (6
1. A cooling circuit for a liquid-cooled internal combustion engine for a motor vehicle comprising: a main cooling circuit (2) including a radiator (6);a feed line (5) leading to said radiator (6); and a return line (7) leading away from said radiator (6);a bypass line (9) bypassing said radiator (6) and constructed so as to be controllable as a function of predetermined parameters;a retarder (4) of a braking device;a secondary cooling circuit (3) for said retarder (4), said secondary cooling circuit (3) having a feed line (11) and a return line (12); said main cooling circuit (2) having a flow rate to said radiator (6) and said secondary cooling circuit (3) having a flow rate to said retarder (4);a single rotary slide valve (10) arranged for controlling said main cooling circuit (2) and said secondary cooling circuit (3); said main cooling circuit (2) and said secondary cooling circuit (3) being interconnected for varying at least one of the flow rate to said radiator (6) and the flow rate to said retarder (4) in a defined manner;wherein said rotary slide valve (10) comprises a housing (10a) having four throughflow openings therein and being inserted into said feed line (5) leading from the internal combustion engine to said radiator (6); said bypass line (9) being connected to a third throughflow opening of said rotary slide valve between said feed line (5) and said return line (12); said return line (12) of said retarder (4) connected to a fourth throughflow opening (15); and wherein said feed line (11) of said retarder (4) is connected to said feed line (5a) of said main cooling circuit (3) upstream of said rotary slide valve (10); andwherein three of said four throughflow openings are arranged radially on said housing (10a) of said rotary slide valve (10); said rotary slide valve further comprising a crescent-shaped rotary slide (10b); said fourth throughflow opening (15) for said return line (12) of said retarder (4) being aligned axially with respect to said rotary slide (10b) and being permanently open; and wherein said housing, said rotary slide and said three radial throughflow openings are constructed so as to permit a least the simultaneous partial opening of all three radially arranged throughflow openings. 2. The cooling circuit according to claim 1, wherein one of the flow rate of said radiator (6) and the flow rate of said retarder (4) is varied between 0% and 100%. 3. The cooling circuit according to claim 1, wherein said three throughflow openings are arranged in one of a common plane and so as to be distributed in a circumferential direction. 4. The cooling circuit according to claim 1, wherein said rotary slide valve (10) includes a rotary slide (106) having a crescent shaped cross section. 5. The cooling circuit according to claim 1, additionally comprising a restriction element (13) disposed in said feed line (5) leading from the internal combustion engine to said radiator (6) upstream of said rotary slide valve (10) but downstream of a branch point of said feed line (11) of said secondary cooling circuit (3); said restriction element (13) designed to ensure a minimum throughput of cooling liquid through said retarder (4). 6. The cooling circuit according to claim 1, additionally comprising a delivery device (8) having a delivery rate and disposed into said main cooling circuit 2. 7. The cooling circuit according to claim 6, wherein said delivery device is a delivery pump. 8. The cooling circuit according to claim 7, wherein said delivery pump is one of output-controlled and capable of temporarily being operated with a greater or lesser delivery rate in accordance with the operating position of said rotary slide valve 10. 9. The cooling circuit according to claim 6, wherein said delivery device (8) is one of an electrically controllable delivery pump and a mechanical delivery pump, said mechanical delivery pump including a coupling device for coupling said delivery pump to the internal combustion engine (1) and an adjusting device for controlling said delivery rate of said delivery device. 10. The cooling circuit according to claim 9, wherein said coupling device is a belt drive (17). 11. The cooling circuit according to claim 9, wherein said adjusting device is a clutch device (18) or an adjustable guide vane arrangement (19). 12. The cooling circuit according to claim 6, wherein said rotary slide valve (10) is constructed so as to be capable of one of decoupling said retarder (4) and bypassing said main cooling circuit (2) thereby reducing the delivery rate of said delivery device in relation to a constant delivery rate. 13. The cooling circuit according to claim 6, wherein said rotary slide valve (10) and said delivery device (8) of said main cooling circuit (2) are arranged in a common housing. 14. The cooling circuit according to claim 1, additionally comprising an auxiliary power device for adjusting said rotary slide valve (10), wherein parameters of one of the operating temperatures (T) of said cooling circuits (2, 3), the load states (L) of the internal combustion engine and the operating states (R) of said retarder (4) are detected and at least one of said rotary slide valve (10) and said delivery rate of said delivery pump is adjusted in accordance with said parameters. 15. The cooling circuit according to claim 14, wherein said auxiliary power device is one of an electrical, pneumatical, hydraulic and magnetical power device. 16. The cooling circuit according to claim 15, wherein said auxiliary power device is a stepper motor (20). 17. The cooling circuit according to claim 1, additionally comprising a control unit (14) including a feedback system; and wherein said rotary slide valve additionally comprises at least one position sensor (21) for monitoring the operation of said rotary slide valve in said feedback control system of said control unit. 18. The cooling circuit according to claim 1, wherein said rotary slide valve (10) is constructed so as to activate said retarder (4) in a heating function for the internal combustion engine and the secondary cooling circuit (3) is connected temporarily to said bypassed main cooling circuit (3). 19. The cooling circuit according to claim 1, wherein said rotary slide (10b) of said rotary slide valve (10) is spring-loaded into a predetermined operating position so that both said main cooling circuit (2) and said secondary cooling circuit (3) are connected to said radiator (6) of said main cooling circuit (2) in terms of flow. 20. A method of operating a cooling circuit according to claim 1.
이 특허에 인용된 특허 (4)
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Norris,Robert; McLane,R. Allan, Automotive coolant control valve.
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Lehmann Kai,DEX, Control device for the coolant and heating circulation circuit of an internal combustion engine.
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Busato Murray F.,CAX ; Cook John Edward,CAX, Proportional coolant valve.
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Liederman, Keith E.; Vint, Matti K.; Bejster, Joseph V.; Piccirilli, Davide F., Vehicle engine cooling system with variable speed water pump.
이 특허를 인용한 특허 (1)
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Ekman, Mats; Strindlund, Mattias; Hildahl, Stig, Cooling system in a vehicle.
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