CA2232642A1 - Process for regulating the cooling system of a diesel-engined excavator drive and cooling system for such drives - Google Patents
Process for regulating the cooling system of a diesel-engined excavator drive and cooling system for such drives Download PDFInfo
- Publication number
- CA2232642A1 CA2232642A1 CA002232642A CA2232642A CA2232642A1 CA 2232642 A1 CA2232642 A1 CA 2232642A1 CA 002232642 A CA002232642 A CA 002232642A CA 2232642 A CA2232642 A CA 2232642A CA 2232642 A1 CA2232642 A1 CA 2232642A1
- Authority
- CA
- Canada
- Prior art keywords
- fan
- cooling system
- diesel engine
- water
- diesel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Component Parts Of Construction Machinery (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The proposal is for a process for regulating the cooling system of an especially powerful diesel-engined excavator drive, where a thermostat (4) fitted in the region of the diesel engine (1) opens the flow path of the diesel engine (1) to a radiator (5) co-operating with a fan (8) at a predetermined water temperature, in which a temperature measuring device (11) fitted in the region of the flow path controls the fan (8) in such a way that, within a predeterminable temperature range above the thermostatically controlled water temperature, the rotation speed of the fan (8) is regulated in the range between 0 min-1 and a maximum speed.
Description
Docket ORKOP 0061 Translation of original text for German Application Process for Regulating the Cooling System of a Diesel-Powered Excavator Drive and Cooling System for Such Drives The invention concerns a process for regulating the cooling system of an especially powerful cliesel-powered excavator drive.
As a rule, excavators are driven by at least one diesel engine, wherein this diesel engine frequently also drives the fan wheel for the water-cooled radiator. Alternatively, it is also possible to actuate the fan wheel with the aid of separate hydrostatic drives, wherein the hyclraulic pump in turn is driven by the diesel-powered engine. Accordingly, the fan wheel follows ]0 continuously in dependence on the respective rotational speed of the diesel engine, which results in power losses of up to 5~, in particular for excavators with more powerful diesel engines (> 600 kw). Depending on the structural size of the excavator, this can be in the order of 55 to 60 kw. A further disadvantage is that the ~5 continuously running fan wheel generates a not inconsiderable amount of noise, again depending on the rotational speed.
The object of the subject-matter of the invention is to develop a process for regulatin.g the cooling systems of an especially powerful diesel-powerecl excavator drive, as well as a cooling system for especially powerful diesel-powered excavator drives, making it possible to avoid the powér losses on the one hand and, on the other hand, leading to a reduction in the noise level.
With a process for regulatlng the cooling system of an especially powerful diesel-powered excavator drive, this object is achieved in that a thermostat, provided in the region of the diesel engine, opens the flow path from the diesel engine to a water-cooled radiator that operates jointly with a fan once a predetermined water temperature is reached, wherein a temperature measuring device installed in the flow path region actuates the fan in such a way that within a predetermined temperature range above the thermostatically regulated water temperature, the rotational speed of the fan is regulated in the range between O min~1 and a maximum rotational speed.
O
Advantageous improvements of the process according to the invention follow from the associated dependent claims.
This object is also achieved with a cooling system for especially powerful diesel-powered excavator drives having a thermostatically controlled diesel engine, a water-cooled radiator, a separately driven fan as well as connecting pipes or hoses between diesel engine and water-cooled radiator for the cooling medium, wherein a temperature measuring device is provided in the region of the flow path for the cooling medium, which is operatively connected via a signal line to the fan drive.
Advantageous improvements of the cooling system according to the invention follow from the associated dependent claims that refer to the subject-matter.
The measures according to the invention achieve that the fan starts up only if the cooling air is actually needed. As compared to the mode of operation used up to now, the present power loss of approximately 5%, picked up by the fan wheel or its drive, can be avoided, particularly in cold regions. As a result of the fact that the fan wheel now follows only as needed or in the lower ~0 ranges for the rotational speecl, a reduction in the noises resulting from the total drive takes place.
The subject-matter of the invention is illustrated in the drawing with the aid of an exemplary embodiment and is described as follows.
The single figure shows a bas:ic diagram of the diesel-powered drive for a hydraulic excavator, which is ~ot shown in further detail. Visible are a diesel engine 1, an internal cooling-water circulation 2 within the diesel engine 1, a water pump 3 as well as a thermostat 4. The water pump 3 moves the cooling medium along its internal flow path until a p:redetermined water temperature, e.g. 85~ C, is reached. The thermostat 4 is designed such that it opens up at that temperature, thus opening up the path to the downstream water-cooled radiator 5. The diesel engine 1 is connected to the water-cooled radiator 5 via hoses 6, 7, so that the flow path for the cooling medium henceforth comprises not only the internal flow circulation 2, but also the hoses 6, 7 as well as the water-cooled radiator 5. A fGa wheel 8 is arranged behind the water-cooled radiator 5 and, for this example, consists of a hydrostatic drive comprising a fan pump 9 as well as a hydraulic motor 10. A temperature measuring device 11 is arranged in the region of the hose assembly 6. Sa.id temperature measuring device is connected via an electrical signal line 12 to the regulator 13, which is only indicated here, fcr the fan pump 9, designed as variable displacement pump for this example. The fan pump 9 is driven by way of the diesel engine 1 and pumps hydraulic medium to the hydraulic motor 10, which is a fixed displacement motor for this example and is connected to t.he fan wheel 8. The regulation of the cooling system is provided ,uch that the fan wheel 8 is not driven by the motor 10, meaning it stands still, until a defined water temperature is reached (e.g. 87~ C). Once the water temperature of 85~ C is reached, th.e thermostat 4 opens up the flow path for the cooling medium to the water-cooled radiator 5. It is only when the temperature increases further (to 87~ C), which is detected by the temperature measuring device 11, that the regulator ~5 13 for the fan pump 9 is activatecL via the signal line 12 in such a way that it moves on stroke and the hydraulic medium is now transported to the fan motor 10, which is then slowly adjusted upward, starting from the zero position, in dependence on the temperature. For this example, Ihe maximum rotational speed for the fan must adjust itself when the water temperature reaches 95~
C. Thus, a temperature window of 8~ C is formed, within which the rotational speed for the fan is adjusted between zero and a defined maximum rotational speed. When the water temperature drops, the above described sequential steps occur in reverse, that is to say for a temperature of 87~ C, the rotational speed of the fan wheel 8 is again at zero and the hydraulic flow fro~ the radiator pump 9 to the hydraulic motor 10 is interrupted since the radiator pump 9 has moved back to the zero position.
As a rule, excavators are driven by at least one diesel engine, wherein this diesel engine frequently also drives the fan wheel for the water-cooled radiator. Alternatively, it is also possible to actuate the fan wheel with the aid of separate hydrostatic drives, wherein the hyclraulic pump in turn is driven by the diesel-powered engine. Accordingly, the fan wheel follows ]0 continuously in dependence on the respective rotational speed of the diesel engine, which results in power losses of up to 5~, in particular for excavators with more powerful diesel engines (> 600 kw). Depending on the structural size of the excavator, this can be in the order of 55 to 60 kw. A further disadvantage is that the ~5 continuously running fan wheel generates a not inconsiderable amount of noise, again depending on the rotational speed.
The object of the subject-matter of the invention is to develop a process for regulatin.g the cooling systems of an especially powerful diesel-powerecl excavator drive, as well as a cooling system for especially powerful diesel-powered excavator drives, making it possible to avoid the powér losses on the one hand and, on the other hand, leading to a reduction in the noise level.
With a process for regulatlng the cooling system of an especially powerful diesel-powered excavator drive, this object is achieved in that a thermostat, provided in the region of the diesel engine, opens the flow path from the diesel engine to a water-cooled radiator that operates jointly with a fan once a predetermined water temperature is reached, wherein a temperature measuring device installed in the flow path region actuates the fan in such a way that within a predetermined temperature range above the thermostatically regulated water temperature, the rotational speed of the fan is regulated in the range between O min~1 and a maximum rotational speed.
O
Advantageous improvements of the process according to the invention follow from the associated dependent claims.
This object is also achieved with a cooling system for especially powerful diesel-powered excavator drives having a thermostatically controlled diesel engine, a water-cooled radiator, a separately driven fan as well as connecting pipes or hoses between diesel engine and water-cooled radiator for the cooling medium, wherein a temperature measuring device is provided in the region of the flow path for the cooling medium, which is operatively connected via a signal line to the fan drive.
Advantageous improvements of the cooling system according to the invention follow from the associated dependent claims that refer to the subject-matter.
The measures according to the invention achieve that the fan starts up only if the cooling air is actually needed. As compared to the mode of operation used up to now, the present power loss of approximately 5%, picked up by the fan wheel or its drive, can be avoided, particularly in cold regions. As a result of the fact that the fan wheel now follows only as needed or in the lower ~0 ranges for the rotational speecl, a reduction in the noises resulting from the total drive takes place.
The subject-matter of the invention is illustrated in the drawing with the aid of an exemplary embodiment and is described as follows.
The single figure shows a bas:ic diagram of the diesel-powered drive for a hydraulic excavator, which is ~ot shown in further detail. Visible are a diesel engine 1, an internal cooling-water circulation 2 within the diesel engine 1, a water pump 3 as well as a thermostat 4. The water pump 3 moves the cooling medium along its internal flow path until a p:redetermined water temperature, e.g. 85~ C, is reached. The thermostat 4 is designed such that it opens up at that temperature, thus opening up the path to the downstream water-cooled radiator 5. The diesel engine 1 is connected to the water-cooled radiator 5 via hoses 6, 7, so that the flow path for the cooling medium henceforth comprises not only the internal flow circulation 2, but also the hoses 6, 7 as well as the water-cooled radiator 5. A fGa wheel 8 is arranged behind the water-cooled radiator 5 and, for this example, consists of a hydrostatic drive comprising a fan pump 9 as well as a hydraulic motor 10. A temperature measuring device 11 is arranged in the region of the hose assembly 6. Sa.id temperature measuring device is connected via an electrical signal line 12 to the regulator 13, which is only indicated here, fcr the fan pump 9, designed as variable displacement pump for this example. The fan pump 9 is driven by way of the diesel engine 1 and pumps hydraulic medium to the hydraulic motor 10, which is a fixed displacement motor for this example and is connected to t.he fan wheel 8. The regulation of the cooling system is provided ,uch that the fan wheel 8 is not driven by the motor 10, meaning it stands still, until a defined water temperature is reached (e.g. 87~ C). Once the water temperature of 85~ C is reached, th.e thermostat 4 opens up the flow path for the cooling medium to the water-cooled radiator 5. It is only when the temperature increases further (to 87~ C), which is detected by the temperature measuring device 11, that the regulator ~5 13 for the fan pump 9 is activatecL via the signal line 12 in such a way that it moves on stroke and the hydraulic medium is now transported to the fan motor 10, which is then slowly adjusted upward, starting from the zero position, in dependence on the temperature. For this example, Ihe maximum rotational speed for the fan must adjust itself when the water temperature reaches 95~
C. Thus, a temperature window of 8~ C is formed, within which the rotational speed for the fan is adjusted between zero and a defined maximum rotational speed. When the water temperature drops, the above described sequential steps occur in reverse, that is to say for a temperature of 87~ C, the rotational speed of the fan wheel 8 is again at zero and the hydraulic flow fro~ the radiator pump 9 to the hydraulic motor 10 is interrupted since the radiator pump 9 has moved back to the zero position.
Claims (6)
1. A process for regulating the cooling system of an especially powerful diesel-powered excavator drive, for which the flow path (6, 7) from the diesel engine (1) to a water-cooled radiator (5) that operates jointly with a fan (8) is opened up at predetermined water temperature by a thermostat (4), that is provided in the region of the diesel engine (1), wherein a temperature measuring device (11), arranged in the region of the flow path (6), actuates the fan (8) in such a way that within a predetermined temperature range above the thermostatically-controlled water temperature, the rotational speed for the fan (8) is adjusted to be in the range between 0 min-1 and a maximum rotational speed.
2. A process according to claim 1, characterized in that the thermostat (4) opens up the flow path (6, 7) to the water-cooled radiator (5) at a water temperature of approximately 80° C to 85° C
3. A process according to the claims 1 and 2, characterized in that the temperature measuring device (11) actuates the motor (10) for fan (8) via the regulator (13) of a fan pump (9) that is driven by the diesel engine (1), in such a way that for a water temperature of approximately 84° C to 88 ° C, the rotational speed of the fan is slowly increased, starting with the rotational speed range 0 min-1, wherein the maximum rotational speed, as needed, is reached only for a water temperature of approximately 93° C to 97°
C.
C.
4. A cooling system for especially powerful diesel-powered excavator drives with a thermostatically-controlled diesel engine (1), a water-cooled radiator (5), a separately driven fan (8), as well as connecting pipes or hoses (6, 7) between diesel engine (1) and water-cooled radiator (5) for the cooling medium, wherein a temperature measuring device (11) is provided for the cooling medium in the region of the flow path (6), which device is operatively connected via a signal line (12) to the fan drive (9, 10).
5. A cooling system according to claim 4, characterized in that the temperature measuring device (11) is connected via the signal line (12) to the regulator (13) of a fan pump (9), driven by the diesel engine (1), and is in particular hydraulically adjustable.
6. A cooling system according to the claims 4 and 5, characterized in that the fan pump (9) feeds a hydraulic motor (10), which drives the fan (8) and is designed, in particular, as a fixed displacement motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19535674.8 | 1995-09-26 | ||
| DE19535674A DE19535674A1 (en) | 1995-09-26 | 1995-09-26 | Process for controlling the cooling device of a diesel engine excavator drive and cooling device for diesel engine excavator drives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2232642A1 true CA2232642A1 (en) | 1997-04-03 |
Family
ID=7773154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002232642A Abandoned CA2232642A1 (en) | 1995-09-26 | 1996-08-12 | Process for regulating the cooling system of a diesel-engined excavator drive and cooling system for such drives |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0852664A1 (en) |
| JP (1) | JPH11511530A (en) |
| KR (1) | KR19990064447A (en) |
| CN (1) | CN1169176A (en) |
| AU (1) | AU6872496A (en) |
| BR (1) | BR9610697A (en) |
| CA (1) | CA2232642A1 (en) |
| DE (1) | DE19535674A1 (en) |
| WO (1) | WO1997012131A1 (en) |
| ZA (1) | ZA967586B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19844526A1 (en) * | 1998-09-29 | 2000-03-30 | Behr Industrietech Gmbh & Co | Drive arrangement for fan of vehicle has drive shaft of fluid friction coupling connected to hydrostatic motor connected via hydraulic lines to hydraulic pump driven by engine |
| DE10044607A1 (en) | 2000-09-08 | 2002-04-04 | O & K Mining Gmbh | Method and device for controlling a fan drive of an internal combustion engine in construction and / or work machines |
| JP5518589B2 (en) * | 2010-06-18 | 2014-06-11 | 日立建機株式会社 | Work machine |
| CN101892894A (en) * | 2010-06-24 | 2010-11-24 | 上海三一科技有限公司 | Hydraulically-driven diesel radiating system and method thereof |
| CN106195606A (en) * | 2016-07-13 | 2016-12-07 | 重庆大学 | The adjustable three-dimensional ribbed pipe oil cooler of a kind of oil temperature |
| CN111042905B (en) * | 2020-01-15 | 2021-10-29 | 重庆西晶源流体技术有限公司 | Vehicle fan cooling hydraulic system and control method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062329A (en) * | 1976-07-29 | 1977-12-13 | The United States Of America As Represented By The Secretary Of The Army | Fan drive system |
| DE3018076A1 (en) * | 1980-05-12 | 1981-11-19 | GST Gesellschaft für Systemtechnik mbH, 4300 Essen | Variable speed fan drive for engine cooling system - employing hydraulic fan motor and programmable control circuit |
| JPS58124017A (en) * | 1982-01-19 | 1983-07-23 | Nippon Denso Co Ltd | Cooling system controller of engine |
| GB8614699D0 (en) * | 1986-06-17 | 1986-07-23 | Sundstrand Hydratec Ltd | Engine cooling systems |
-
1995
- 1995-09-26 DE DE19535674A patent/DE19535674A1/en not_active Withdrawn
-
1996
- 1996-08-12 CA CA002232642A patent/CA2232642A1/en not_active Abandoned
- 1996-08-12 EP EP96929239A patent/EP0852664A1/en not_active Withdrawn
- 1996-08-12 CN CN96191125A patent/CN1169176A/en active Pending
- 1996-08-12 KR KR1019970704557A patent/KR19990064447A/en not_active Application Discontinuation
- 1996-08-12 WO PCT/EP1996/003556 patent/WO1997012131A1/en not_active Application Discontinuation
- 1996-08-12 JP JP9512982A patent/JPH11511530A/en active Pending
- 1996-08-12 AU AU68724/96A patent/AU6872496A/en not_active Abandoned
- 1996-08-12 BR BR9610697-2A patent/BR9610697A/en not_active Application Discontinuation
- 1996-09-09 ZA ZA967586A patent/ZA967586B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE19535674A1 (en) | 1997-03-27 |
| JPH11511530A (en) | 1999-10-05 |
| WO1997012131A1 (en) | 1997-04-03 |
| ZA967586B (en) | 1997-03-10 |
| EP0852664A1 (en) | 1998-07-15 |
| AU6872496A (en) | 1997-04-17 |
| KR19990064447A (en) | 1999-08-05 |
| BR9610697A (en) | 1999-09-21 |
| CN1169176A (en) | 1997-12-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |