US6772715B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling circuit of a liquid-cooled internal combustion engine
Assignee: Mercedes Benz Group AG
•
Filing: 2002-12-13
•
Granted: 2004-08-10
•
Expires: 2022-12-13
Abstract
Abstract In a cooling circuit of a liquid-cooled internal combustion engine of a motor vehicle having a coolant pump, an electrical mixing valve, a radiator, a heater, an engine-oil heat exchanger, a transmission-oil cooler for transferring heat to the ambient air, a transmission-oil/cooling water heat exchanger for transferring heat between the transmission oil and the cooling water arranged in parallel flow circuit with the transmission-oil cooler, and an actuator for controlling the oil flow distribution, an electrical mixing valve is arranged in the cooling water line to the radiator/transmission-oil cooler and the transmission-oil/cooling water heat exchanger, such that the heat transfer in the transmission-oil/cooling water heat exchanger can be controlled by controlling the coolant flows through the transmission oil/cooling water heat exchanger and the radiator.
Inventors
- 👤 Harald Pfeffinger
- 👤 Heiko Sass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:18
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; F01; F01P; F01P3/00; F01P3/20; F01P7/00; F01P7/14; F01P7/16; F02; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/28; F16H57/0413; F01P5/00; F01P5/10; F01P2005/105; F01P5/12; F01P2005/125; F01P2007/146; F01P2025/00; F01P2025/08; F01P2025/40; F01P2060/00; F01P2060/04; F01P2060/045; F01P2060/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
244 words
A cooling circuit of a liquid cooled internal combustion engine ( 2 a , 2 b ) with a transmission ( 3 ) of a motor vehicle, said cooling circuit ( 1 ) comprising a pump ( 10 ) for delivering cooling water to said engine ( 2 a , 2 b ), a cooling water circulating line ( 4 ) connected to said engine ( 2 a , 2 b ) and including an electrical valve ( 5 ) for selectively directing cooling water either to a radiator ( 6 ) or a transmission oil/cooling water heat exchanger ( 9 ), lines connecting the inlet of the pump ( 10 ) to the outlets of the transmission/cooling water heat exchanger ( 9 ) and the radiator ( 6 ), a transmission oil circulation line connected to an outlet of said transmission and extending to a controlled valve ( 18 ) for selectively conducting the transmission oil through the transmission oil/cooling water heat exchanger ( 9 ) or a transmission oil cooler ( 7 ) of the radiator ( 6 ) before returning it to the transmission through a return line ( 19 ) extending to the transmission ( 9 ) and a heater circuit extending from the engine to the pump ( 10 ) and including a vehicle heater ( 14 ) and an engine oil heater ( 16 ) arranged in the heater circuit downstream of the vehicle heater ( 14 ).
Claim 2
Dependent Claim
244 words
A cooling circuit of a liquid cooled internal combustion engine ( 2 a , 2 b ) with a transmission ( 3 ) of a motor vehicle, said cooling circuit ( 1 ) comprising a pump ( 10 ) for delivering cooling water to said engine ( 2 a , 2 b ), a cooling water circulating line ( 4 ) connected to said engine ( 2 a , 2 b ) and including an electrical valve ( 5 ) for selectively directing cooling water either to a radiator ( 6 ) or a transmission oil/cooling water heat exchanger ( 9 ), lines connecting the inlet of the pump ( 10 ) to the outlets of the transmission/cooling water heat exchanger ( 9 ) and the radiator ( 6 ), a transmission oil circulation line connected to an outlet of said transmission and extending to a controlled valve ( 18 ) for selectively conducting the transmission oil through the transmission oil/cooling water heat exchanger ( 9 ) or a transmission oil cooler ( 7 ) of the radiator ( 6 ) before returning it to the transmission through a return line ( 19 ) extending to the transmission ( 9 ) and a heater circuit extending from the engine to the pump ( 10 ) and including a vehicle heater ( 14 ) and an engine oil heater ( 16 ) arranged in the heater circuit downstream of the vehicle heater ( 14 ).
Claim 3
Dependent Claim
34 words
A cooling circuit according to claim 1 , wherein said controlled valve ( 18 ) is arranged downstream of the transmission-oil cooler ( 7 ) and the transmission-oil/cooling water heat exchanger ( 9 ).
Claim 4
Dependent Claim
34 words
A cooling circuit according to claim 1 , wherein said controlled valve ( 18 ) is arranged upstream of the transmission-oil cooler ( 7 ) and the transmission-oil/cooling water heat exchanger ( 9 ).
Claim 5
Dependent Claim
34 words
A cooling circuit according to claim 1 , wherein a cooling-water side of the transmission-oil/cooling water heat exchanger ( 9 ) is connected in a parallel flow circuit with the radiator ( 6 ).
Claim 6
Dependent Claim
28 words
A cooling circuit according to claim 1 , wherein an EGR cooler ( 13 ) is arranged in the heater circuit upstream of said heater ( 14 ).
Claim 7
Dependent Claim
258 words
A cooling circuit of a liquid-cooled internal combustion engine ( 2 a , 2 b ) with a transmission of a motor vehicle, said cooling circuit ( 1 ) comprising, a pump for delivering cooling water to said engine ( 2 a , 2 b ), a cooling water circulating line ( 4 ) connected to said engine ( 2 a , 2 b ) and including an electrical valve ( 5 ) for selectively directing cooling water either to a radiator ( 6 ) or a transmission oil/cooling water heat exchanger ( 9 ), lines connecting the inlet of the pump ( 10 ) to the outlets of the transmission oil/cooling water heat exchanger ( 9 ) and the radiator ( 6 ), a transmission oil circulation line connected to an outlet of the transmission and extending to a controlled valve ( 18 ) for selectively conducting the transmission oil through the transmission oil/cooling water heat exchanger ( 9 ) or a transmission oil cooler ( 7 ) of the radiator ( 6 ) before returning it to the transmission through a return line ( 19 ) extending to the transmission ( 3 ) and a heater circuit extending from the engine ( 2 a , 2 b ) to the pump ( 10 ) and including a vehicle heater ( 14 ) and an engine oil heater ( 16 ) and also the transmission oil/cooling water heat exchanger ( 9 ), which is arranged in the heater circuit downstream of the vehicle heater ( 14 ).
Claim 8
Dependent Claim
258 words
A cooling circuit of a liquid-cooled internal combustion engine ( 2 a , 2 b ) with a transmission of a motor vehicle, said cooling circuit ( 1 ) comprising, a pump for delivering cooling water to said engine ( 2 a , 2 b ), a cooling water circulating line ( 4 ) connected to said engine ( 2 a , 2 b ) and including an electrical valve ( 5 ) for selectively directing cooling water either to a radiator ( 6 ) or a transmission oil/cooling water heat exchanger ( 9 ), lines connecting the inlet of the pump ( 10 ) to the outlets of the transmission oil/cooling water heat exchanger ( 9 ) and the radiator ( 6 ), a transmission oil circulation line connected to an outlet of the transmission and extending to a controlled valve ( 18 ) for selectively conducting the transmission oil through the transmission oil/cooling water heat exchanger ( 9 ) or a transmission oil cooler ( 7 ) of the radiator ( 6 ) before returning it to the transmission through a return line ( 19 ) extending to the transmission ( 3 ) and a heater circuit extending from the engine ( 2 a , 2 b ) to the pump ( 10 ) and including a vehicle heater ( 14 ) and an engine oil heater ( 16 ) and also the transmission oil/cooling water heat exchanger ( 9 ), which is arranged in the heater circuit downstream of the vehicle heater ( 14 ).
Claim 9
Dependent Claim
63 words
A cooling circuit according to claim 6 , wherein the engine oil heater ( 16 ) and the transmission oil/cooling water heat exchanger ( 9 ) are arranged in the heater circuit in parallel and an actuator is provided for controlling the cooling water flow through the engine oil heater ( 16 ) and the transmission oil/cooling water heat exchanger ( 9 ).
Claim 10
Dependent Claim
28 words
A cooling circuit according to claim 6 , wherein an EGR cooler ( 13 ) is arranged in the heater circuit upstream of said heater ( 14 ).
References Cited (Backward Citations)
DE905459C
Cited
US3315464A
Cited
US3752222A
Cited
EP0736703A1
Cited
JPH11264318A
Cited
US6427640B1
Cited
US6536381B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-08-10 | 2008-02-09 | 2008-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-08-10 | 2012-02-09 | 2012-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-08-10 | 2016-02-09 | 2016-08-10 | $7700.00 | Window Closed / Lapsed |