CN211082036U - Pilot-controlled hydraulic retarder cooling system for commercial vehicle - Google Patents
Pilot-controlled hydraulic retarder cooling system for commercial vehicle Download PDFInfo
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- CN211082036U CN211082036U CN201922062695.7U CN201922062695U CN211082036U CN 211082036 U CN211082036 U CN 211082036U CN 201922062695 U CN201922062695 U CN 201922062695U CN 211082036 U CN211082036 U CN 211082036U
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Abstract
The utility model belongs to the technical field of the automobile cooling system, concretely relates to hydraulic retarber cooling system of guide's control for commercial vehicle. The water pump specifically comprises a heat dissipation part, an engine part, an electric water valve and a retarding part, wherein the heat dissipation part is respectively connected with the engine part and the retarding part through pipes through pipelines, the engine part is connected with the retarding part through pipes, one end of the electric water valve is connected with the engine part through pipes, the other end of the electric water valve is connected with the heat dissipation part through a liquid outlet pipe, and the electric water valve is electrically connected with the retarding part. The utility model provides a special hydraulic retarber engine of research and development among the prior art with high costs, or the pipeline arrangement is complicated when adopting conventional engine, and engine warm-up time is long so that the defect that the vehicle starts burning, emission and oil consumption worsen later.
Description
Technical Field
The utility model belongs to the technical field of the automobile cooling system, concretely relates to hydraulic retarber cooling system of guide's control for commercial vehicle.
Background
The hydraulic retarder is used as an automobile auxiliary braking device, converts the potential energy of a vehicle descending slope into heat energy, and exchanges the heat energy into air through an engine cooling system. The brake has the characteristics of small abrasion, long service life, large braking torque, stable process, no heat fading, good heat dissipation performance and the like, and is widely applied to commercial vehicles.
At present, a commercial vehicle hydraulic retarder cooling system mostly adopts a hot water cooling mode, namely, coolant firstly passes through an engine and then passes through a hydraulic retarder, and two application modes are mainly adopted.
Prior art 1: the engine is used for developing a special hydraulic retarder, a water inlet and a water outlet are added between an engine water jacket and a built-in thermostat, the retarder is connected in series, and the flowing direction of cooling liquid sequentially comprises the following steps: a radiator water outlet, an engine water inlet, a hydraulic retarder, an engine water outlet and a radiator water inlet; the mode can utilize a thermostat arranged in the engine to control the opening of the size circulation of the cooling liquid, and the retarder pipeline is simple in arrangement, but the development cost of the engine is high.
Prior art 2: the engine adopts a conventional engine, a large circulation of a built-in thermostat of the engine is normally opened, a small circulation of the engine is closed, an external thermostat is additionally added, and the flowing direction of cooling liquid sequentially comprises the following steps: the hydraulic retarder is arranged at the water inlet of the engine; this mode needs external bypass water route, and the system complexity is high, whole car arranges more difficultly, has increased pipeline and external thermostat and has leaded to the material cost high.
In the two modes, when the engine is in cold start, the cooling liquid passes through the retarder cooling pipeline and the heat exchanger thereof, so that the warm-up time of the engine is longer, and particularly when the ambient temperature is lower, the combustion, the emission and the oil consumption are deteriorated after the vehicle is started.
The invention content is as follows:
the utility model provides a commercial vehicle is with pilot control's hydraulic retarber cooling system can solve and research and develop special hydraulic retarber engine among the prior art with high costs, or the pipeline arrangement is complicated when adopting conventional engine, and engine warm-up time is long so that the defect that the vehicle starts after burning, emission and oil consumption worsen.
The utility model discloses a realize through following technical scheme:
the utility model provides a commercial vehicle is with pilot control's hydraulic retarber cooling system, includes radiating part, engine part, electronic water valve and retards the speed part, the radiating part pass through the pipeline respectively with engine part and the partial union coupling of retarding speed, electronic water valve one end and engine part union coupling, the other end and radiating part go out liquid union coupling, electronic water valve is connected with the partial electricity of retarding speed.
Furthermore, the heat dissipation part comprises a radiator and a fan, and a liquid inlet and a liquid outlet of the radiator are respectively connected with the engine part and the speed-reducing part through pipes.
Furthermore, the engine part comprises an engine body, a built-in thermostat and a water pump, the engine body, the built-in thermostat and the water pump are sequentially communicated in a water way, and one end of the electric water valve is connected with a connecting pipe between the built-in thermostat and the water pump through a pipe.
Furthermore, the retarding part comprises a speed changer, a hydraulic retarder, a retarder heat exchanger and a retarder action switch, one end of the speed changer is mechanically connected with the engine body, the other end of the speed changer is mechanically connected with the hydraulic retarder, the retarder heat exchanger is integrated on the hydraulic retarder, a liquid inlet of the heat exchanger is connected with a liquid outlet pipe of the radiator and is connected with a liquid inlet pipe of the water pump, and the retarder action switch is respectively electrically connected with the hydraulic retarder and the electric water valve.
Further, the built-in thermostat is a non-electronic thermostat.
Compared with the prior art, the utility model discloses following profitable technological effect has:
(1) the utility model discloses a change the pipeline structure of microcirculation, it is short to reach engine warm-up time, engine burning, emission and the good effect of oil consumption performance. When the retarder does not work, the engine is cold started or the water temperature is lower than the initial opening temperature of the built-in thermostat, the electric water valve is closed; the flow direction of the cooling liquid is as follows: water pump → engine body → built-in thermostat → water pump; the coolant does not pass through a hydraulic retarder and related pipelines, the temperature of the coolant rises quickly, the engine warming time is short, and the combustion, emission and oil consumption performance of the engine are good.
(2) The utility model discloses a link to each other the feed liquor pipe of electronic water valve with the connecting pipe between built-in thermostat and the water pump, link to each other the drain pipe of electronic water valve with the drain pipe of radiator, and retarber action switch is connected with hydraulic retarber and electronic water valve electricity respectively, can guarantee to have the water route of leading to flow, thereby the built-in thermostat of in time control is opened, guarantee the timely normal operating of major cycle, the temperature that can guarantee in time to reduce hydraulic retarber is got up in the timely operation of major cycle, thereby guarantee its normal operating.
Description of the drawings:
FIG. 1 is a schematic view of the cooling system of the present invention;
FIG. 2 is a schematic diagram of a prior art cooling system 1;
fig. 3 is a schematic diagram of a cooling system of the prior art 2.
Description of reference numerals:
1-radiator, 2-fan, 3-water pump, 4-electric water valve, 5-built-in thermostat, 6-engine body, 7-retarder action switch, 8-speed changer, 9-hydrodynamic retarder, 10-retarder heat exchanger and 11-external thermostat.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Fig. 2 is a schematic diagram of a hot water loop hydraulic retarder cooling system of a special engine commonly used in the prior art 1. The cooling system adopts a hot water loop for cooling, and two water gaps are added between an engine water jacket and a thermostat on the basis of a conventional engine, and a retarder is connected in series into a water path. The flow direction of the cooling liquid is as follows: the water pump 3 → the engine body 6 → the retarder heat exchanger 10 → the built-in thermostat 5; when the water temperature is lower than the initial opening temperature of the thermostat, the cooling liquid directly returns to the water pump 3 after small circulation; when the water temperature is higher than the full-open temperature of the thermostat, the cooling liquid circulates greatly and returns to the water pump 3 through the radiator 1; when the water temperature is between the initial opening temperature and the full opening temperature of the thermostat, the water temperature has the same magnitude and the same cycle.
Fig. 3 is a schematic diagram of a cooling system of a hot water loop hydraulic retarder with an external thermostat, which is commonly used in the prior art 2. The cooling system adopts a hot water loop for cooling, and a built-in thermostat 5 arranged on the engine needs to be forcibly opened (the large circulation is normally opened, and the small circulation is disconnected). The flow direction of the cooling liquid is as follows: the water pump 3 → the engine body 6 → the built-in thermostat 5 → the retarder heat exchanger 10 → the external thermostat 11; when the water temperature is lower than the initial opening temperature of the thermostat, the cooling liquid directly returns to the water pump 3 after small circulation; when the water temperature is higher than the full-open temperature of the thermostat, the cooling liquid circulates greatly and returns to the water pump 3 through the radiator 1; when the water temperature is between the initial opening temperature and the full opening temperature of the thermostat, the water temperature has the same magnitude and the same cycle.
In the two schemes, the cooling liquid passes through the retarder heat exchanger 10 at any time, so the heat loss is large, the warm-up time of the engine is obviously prolonged when the engine is started at a low temperature, and the water temperature of the engine is lower than the normal water temperature of the engine when the engine runs empty, so the performance and the emission of the engine are deteriorated.
The pipeline layout of the scheme in FIG. 2 is simple, but a special engine needs to be developed, so that the development cost is high; the scheme of fig. 3 adopts an external thermostat 11, and the complexity of the pipeline is greatly improved by fixing the bypass water path and the external thermostat, so that the arrangement is difficult and the material cost is high.
Based on the defect of above-mentioned prior art, the utility model provides a hydraulic retarber cooling system of pilot control for commercial car can solve and research and develop special hydraulic retarber engine among the prior art with high costs, or the pipeline arrangement is complicated when adopting conventional engine, and engine warm-up time is long so that the vehicle starts the defect that later burning, emission and oil consumption worsen.
As shown in fig. 1, a pilot-controlled hydraulic retarder cooling system for a commercial vehicle is characterized in that: including heat dissipation part, engine part, electronic water valve 4 and the part of slowing down, the heat dissipation part passes through the pipeline respectively with engine part and the partial union coupling of slowing down, 4 one ends of electronic water valve and engine part union couplings of engine, the other end and the partial liquid outlet pipe union coupling of heat dissipation part. The pipeline of the hydraulic retarder cooling system mainly adopts a stainless steel pipe or a corrosion-resistant carbon steel pipe, rubber pipes are adopted for transition between the steel pipe and the radiator, between the steel pipe and the hydraulic retarder heat exchanger and between the steel pipe and the steel pipe, and a T-shaped clamp with a torque compensation function is adopted for fastening the rubber pipes and the radiator, so that the reliability of assembly is ensured. As the resistance loss of the retarder cooling system is larger than that of the conventional retarder cooling system, the pressure resistance of the pipeline system is higher than that of the common cooling system, and the pressure resistance of the pipeline and the radiator is not less than 300 kPa. In order to ensure the reliability of the cooling system, all retarder pipelines are fixed on a power assembly through a hoop and a bracket.
Further, the heat dissipation part comprises a radiator 1 and a fan 2, and a liquid inlet and a liquid outlet of the radiator 1 are respectively connected with the engine part and the speed reducing part through pipes.
Further, the engine part comprises an engine body 6, a built-in thermostat 5 and a water pump 3, the engine body 6, the built-in thermostat 5 and the water pump 3 are sequentially communicated through a water channel, the water channel communication comprises a pipe connecting channel and an engine internal water channel, so that a small circulation is formed, one end of the electric water valve 4 is connected with a connecting pipe between the built-in thermostat 5 and the water pump 3 through a pipe, and the other end of the electric water valve is connected with a liquid outlet pipe of the radiator 1 through a pipe, so that a pilot water channel is formed. The pilot waterway can utilize the existing warm air intake of the engine to take water. The built-in thermostat 5 may be a paraffin thermostat.
Furthermore, the retarding part comprises a speed changer 8, a hydrodynamic retarder 9, a retarder heat exchanger 10 and a retarding action switch 7, one end of the speed changer 8 is mechanically connected with the engine body 6, the other end of the speed changer is mechanically connected with the hydrodynamic retarder 9, the retarder heat exchanger 10 is integrated on the hydrodynamic retarder 9, a liquid inlet of the heat exchanger 10 is connected with a liquid outlet pipe of the radiator 1 and is connected with a liquid inlet pipe of the water pump 3, and the retarding action switch 7 is electrically connected with the hydrodynamic retarder 9 and the electric water valve 4 respectively. The retarder action switch 7 controls the hydraulic retarder 9 and the electric control water valve 4 to be synchronously opened in a linkage mode.
The following are respectively explained in conjunction with different operating conditions of the hydrodynamic retarder 9:
firstly, the hydraulic retarder does not work
1) When the engine is cold started or the water temperature is lower than the initial opening temperature of the built-in thermostat 5, the electric water valve 4 is closed; the flow direction of the cooling liquid is as follows: the water pump 3 → the engine body 6 → the built-in thermostat 5 → the water pump 3; the coolant does not pass through the hydraulic retarder 9 and related pipelines, the temperature of the coolant rises quickly, the engine warming time is short, and the combustion, emission and oil consumption performance of the engine are good.
2) When the water temperature continuously rises to the initial temperature, the flow direction of part or all of the cooling liquid is as follows: the water pump 3 → the engine body 6 → the built-in thermostat 5 → the radiator 1 → the retarder heat exchanger 10 → the water pump 3; the total amount of the cooling liquid participating in circulation is increased, so that the temperature of the cooling liquid is properly reduced, the power consumption of a fan is reduced, and the oil consumption of the whole vehicle is reduced.
Secondly, the hydraulic retarder works (when the retarder works, the automobile is in a downhill state, the engine does not work, and the hydraulic retarder works)
1) When the engine is in cold start or the water temperature is lower than the initial temperature of the built-in thermostat 5, the flow direction of the cold-started cooling liquid is known according to the fact that the retarder does not work, and the cooling liquid does not pass through the retarder heat exchanger 10; at this moment, the retarder 9 is started, the water temperature at the position of the built-in thermostat 5 is low, and the water temperature of the hydraulic retarder 9 is rapidly increased, so that the hydraulic retarder 9 is forced to quit working, and the normal use of the hydraulic retarder 9 and the driving safety are affected. Therefore, a pilot waterway is added to the small circulation to control the thermostat to be opened in time.
When the retarder action switch 7 acts, the hydraulic retarder 9 and the electric water valve 4 are controlled to be opened in a linkage mode, the pilot water channel is opened, part of cooling liquid passes through the electric water valve 4 → the retarder heat exchanger 10 (water temperature rises rapidly here) → the water pump 3 → the engine body 6 (no surplus heat is generated by the engine at this time) → the built-in thermostat 5 → the electric water valve 4, the thermostat is initially opened after the cooling liquid is subjected to heat exchange through the retarder heat exchanger, part of the cooling liquid circulates through the radiator 1 → the retarder heat exchanger 10 → the water pump 3, the other part of the cooling liquid circulates through the small circulation and directly reaches the water pump 3, and the other part of the cooling liquid circulates through the retarder and then returns to the.
2) When the water temperature continuously rises to the thermostat and is fully opened, the small circulation is closed, and the flow direction of all cooling liquid is as follows: the water pump 3 → the engine body 6 → the built-in thermostat 5 → the radiator 1 → the retarder heat exchanger 10 → the water pump 3.
The scheme fully considers the arrangement, design feasibility and assembly manufacturability of the whole retarder, and greatly improves the convenience of design and modification of the retarder model.
The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical features of the technical solution of the present invention by those skilled in the art all belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides a commercial vehicle is with pilot control's hydraulic retarber cooling system which characterized in that: including heat dissipation part, engine part, electronic water valve (4) and slow part, the heat dissipation part passes through the pipeline respectively with engine part and slow part union coupling, electronic water valve (4) one end and engine part union coupling, the other end and heat dissipation part play liquid union coupling, electronic water valve (4) are connected with slow part electricity.
2. The pilot-controlled hydraulic retarder cooling system for commercial vehicles according to claim 1, characterized in that: the heat dissipation part comprises a radiator (1) and a fan (2), and a liquid inlet and a liquid outlet of the radiator (1) are respectively connected with the engine part and the slow speed part through pipes.
3. The pilot-controlled hydraulic retarder cooling system for commercial vehicles according to claim 2, characterized in that: the engine part comprises an engine body (6), a built-in thermostat (5) and a water pump (3), the engine body (6), the built-in thermostat (5) and the water pump (3) are sequentially communicated in a water way, and one end of the electric water valve (4) is connected with a connecting pipe between the built-in thermostat (5) and the water pump (3) in a pipe mode.
4. The pilot-controlled hydraulic retarder cooling system for commercial vehicles according to claim 3, characterized in that: the speed slowing part comprises a speed changer (8), a hydrodynamic retarder (9), a retarder heat exchanger (10) and a retarder action switch (7), one end of the speed changer (8) is mechanically connected with the engine body (6), the other end of the speed changer is mechanically connected with the hydrodynamic retarder (9), the retarder heat exchanger (10) is integrated on the hydrodynamic retarder (9), a liquid inlet of the heat exchanger (10) is connected with a liquid outlet pipe of the radiator (1) and connected with a liquid inlet pipe of the water pump (3), and the retarder action switch (7) is electrically connected with the hydrodynamic retarder (9) and the electric water valve (4) respectively.
5. A pilot-controlled hydrodynamic retarder cooling system for commercial vehicles according to claim 3 or 4, characterized in that: the built-in thermostat (5) is a non-electronic thermostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062695.7U CN211082036U (en) | 2019-11-26 | 2019-11-26 | Pilot-controlled hydraulic retarder cooling system for commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062695.7U CN211082036U (en) | 2019-11-26 | 2019-11-26 | Pilot-controlled hydraulic retarder cooling system for commercial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211082036U true CN211082036U (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922062695.7U Active CN211082036U (en) | 2019-11-26 | 2019-11-26 | Pilot-controlled hydraulic retarder cooling system for commercial vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN211082036U (en) |
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2019
- 2019-11-26 CN CN201922062695.7U patent/CN211082036U/en active Active
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