CN210239775U - Engine low-temperature starting auxiliary device and engine assembly - Google Patents
Engine low-temperature starting auxiliary device and engine assembly Download PDFInfo
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- CN210239775U CN210239775U CN201920995072.2U CN201920995072U CN210239775U CN 210239775 U CN210239775 U CN 210239775U CN 201920995072 U CN201920995072 U CN 201920995072U CN 210239775 U CN210239775 U CN 210239775U
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Abstract
The utility model relates to the technical field of engine assembly, in particular to an engine low-temperature start auxiliary device and an engine assembly, the engine low-temperature start auxiliary device comprises a fuel heater, a main exhaust pipeline, a three-way valve and a heating pipeline, two ends of the main exhaust pipeline are respectively connected with a waste gas outlet of the fuel heater and the three-way valve comprises an air inlet which is communicated with a first outlet and a second outlet of the three-way valve, the first end of the heating pipeline is communicated with the first outlet, the gas exhausted by the second end of the heating pipeline can be sprayed to an oil pan, the second outlet is communicated with the external atmosphere, thereby the waste heat generated by the combustion of the fuel heater can be controlled by the three-way valve to heat the oil pan, the viscosity of engine oil is reduced, the engine can be smoothly started at low temperature, the waste heat generated by the fuel heater, waste hot gas can be discharged to the atmosphere through the three-way valve, so that the temperature of the engine oil cannot be excessively increased, and the normal use of the engine oil is ensured.
Description
Technical Field
The utility model relates to an engine assembly technical field especially relates to an engine low temperature starts auxiliary device and engine assembly.
Background
Starting performance is one of the important performance indicators of an engine. Under the condition that the ambient temperature is above-35 ℃, the vehicle can be successfully started within the designed target time basically, but under the ambient temperature below-40 ℃, the vehicle can not be naturally started basically if a special auxiliary starting device is not additionally arranged. The starting resistance of the engine in a low-temperature environment mainly comprises the following steps: the friction resistance of the moving parts, the force generated by the compressed gas of the cylinder, the loss of blow-by, and the force generated by the driving mechanism, and the viscosity of the lubricating oil are one of the key factors that affect the starting resistance torque of the engine. It is known that the viscosity of lubricating oil increases with decreasing temperature, the flow properties decrease, and the frictional resistance increases. As the temperature of the oil decreases, the proportion of the resistance generated by the increasing viscosity of the lubricating oil to the total frictional resistance also increases gradually. The engine starting resistance torque and the lubricating oil viscosity are related as follows:
TC＝T0(V/V0)Y
wherein T isCFor average starting moment of resistance, T0The viscosity of the lubricating oil is V0The starting moment of resistance at that time, Y is a constant related to the speed, and V is the viscosity of the lubricating oil.
Therefore, the engine has reliable starting performance under the extremely low environment temperature below minus 40 ℃, measures such as a large-capacity storage battery and auxiliary intake air heating are needed, and the viscosity of the lubricating oil is needed to be as small as possible, namely, the temperature of the engine oil is increased as much as possible, and the viscosity of the engine oil is reduced.
At present, on the premise of not changing the basic structure of an engine, two technical approaches are available for solving the problem of difficult cold start of the engine: firstly, the starting rotating speed of the engine is improved; secondly, the lowest rotating speed at which the engine can be started is reduced. The fuel oil heater is a commonly used auxiliary preheating device which can reduce the lowest rotating speed of the engine and can start the engine, the heat generated by the combustion of the fuel oil is used for heating the cooling liquid of the engine, so that the temperature of the engine is quickly increased, the starting resistance can be reduced after the engine is heated, the starting rotating speed is increased, the temperature and the pressure of the compression end are increased, and the engine is easy to start.
The fuel oil heater is used for pumping out cooling liquid in an engine by a self-contained pump and heating the cooling liquid, the heated cooling liquid flows back to a water jacket of a cylinder cover from a thermostat to achieve the purpose of warming, but the method only warms the engine body and cannot heat engine oil in an oil pan, and when the engine is started at low temperature, the viscosity is still high due to the fact that the engine oil is not heated, and therefore friction resistance is large in the starting process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides an engine low temperature starts auxiliary device and engine assembly to solve among the prior art fuel oil heater and only can be used for heating the coolant liquid of engine, can't carry out the problem of boosting to machine oil.
On the one hand, the utility model provides an engine low temperature starts auxiliary device for heat the oil pan that sets up on the engine, this engine low temperature starts auxiliary device and includes:
a fuel oil heater;
the first end of the main exhaust pipeline is connected with an exhaust gas outlet of the fuel heater;
the three-way valve comprises an air inlet, a first outlet and a second outlet, the air inlet is communicated with the first outlet and the second outlet, the air inlet is connected with the second end of the main exhaust pipeline, and the second outlet is communicated with the outside atmosphere;
the first end of heating pipeline with first export intercommunication, the second end gas of heating pipeline can spray to on the oil pan.
As a preferred technical scheme of the engine low-temperature starting auxiliary device, the three-way valve is a three-way electromagnetic valve.
As a preferable technical solution of the engine low-temperature start-up auxiliary device, the engine low-temperature start-up auxiliary device further includes an oil temperature sensor disposed in the oil pan and used for measuring an oil temperature, and a controller connected to the oil temperature sensor, the controller is connected to the three-way valve, and the controller is capable of controlling the communication between the air inlet and the first outlet or the second outlet.
The engine low-temperature starting auxiliary device further comprises a cooling system, wherein the cooling system is used for adjusting the temperature of the engine, the fuel heater is connected to the cooling system, and the fuel heater is used for heating cooling liquid circulating in the cooling system.
As a preferable aspect of the engine low-temperature start assist device, the cooling system includes: the water pump is provided with an inlet communicated with an outlet of the radiator, an outlet communicated with a water jacket inlet of the engine, and a water jacket outlet of the engine capable of being communicated with the inlet of the radiator;
the fuel oil heater is internally provided with a heating cavity, an inlet of the heating cavity is communicated with an outlet of the water pump, an outlet of the heating cavity can be communicated with an inlet of the radiator, and the fuel oil heater is used for heating coolant entering the heating cavity.
As a preferred technical solution of the engine low-temperature start-up auxiliary device, the engine low-temperature start-up auxiliary device further comprises a thermostat, wherein the thermostat comprises a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet can be communicated with one of the first liquid outlet and the second liquid outlet, or the liquid inlet is communicated with both the first liquid outlet and the second liquid outlet;
the inlet respectively with the water jacket export of engine with the export intercommunication in heating chamber, first liquid outlet with the entry intercommunication of water pump, the second liquid outlet with the entry intercommunication of radiator.
As a preferred technical scheme of the engine low-temperature starting auxiliary device, the radiator comprises a radiating water tank and a radiating fan arranged on one side of the radiating water tank, and the radiating fan is used for cooling the radiating water tank.
The engine low-temperature starting auxiliary device is characterized by further comprising a controller, wherein an inlet temperature sensor is arranged at an inlet of the heating cavity and used for measuring the temperature of the cooling liquid passing through the inlet of the heating cavity, an outlet temperature sensor is arranged at an outlet of the heating cavity and used for measuring the temperature of the cooling liquid passing through the outlet of the heating cavity, the inlet temperature sensor and the outlet temperature sensor are both connected with the controller, the controller is further connected with a fuel injector of the fuel heater, and the controller is used for controlling the opening degree of the fuel injector.
As a preferable technical scheme of the engine low-temperature starting auxiliary device, a control valve is arranged on a connecting pipeline between an inlet of the heating cavity and an outlet of the water pump.
On the other hand, the utility model provides an and engine assembly, including the engine low temperature start-up auxiliary device in any one of above-mentioned scheme.
The utility model has the advantages that:
the utility model provides an engine low temperature starts auxiliary device, this engine low temperature start auxiliary device include fuel heater, exhaust trunk line, three-way valve and heated pipeline. The first end of main exhaust pipe is connected with fuel oil heater's waste gas outlet, and the three-way valve includes income gas port, first export and second export, goes into the gas port and communicates with first export and with the second export alternative, goes into the gas port and is connected with main exhaust pipe's second end. The first end and the first export intercommunication of heating pipeline, the second end gas of heating pipeline can be sprayed on the oil pan, and the second export communicates with external atmosphere. The waste heat that the fuel heater burning produced can enter into the exhaust trunk line through fuel heater's exhaust outlet to guide to the heating pipeline through the three-way valve and heat with the machine oil to in the oil pan, thereby, when engine low temperature starts, the waste heat that the fuel heater produced can be fully utilized and oil pan is heated, reduces machine oil viscosity, does benefit to the smooth start-up of engine low temperature. And after the engine starts, accessible three-way valve communicates main exhaust pipe with the second export, and the waste heat that fuel oil heater burning produced is discharged to the atmosphere in, makes the machine oil temperature can not excessively rise, guarantees that machine oil can normal use.
Drawings
Fig. 1 is a schematic structural diagram of an engine low-temperature start auxiliary device in an embodiment of the present invention.
In the figure:
1. a fuel oil heater; 11. a heating cavity; 12. a fuel injector; 2. a main exhaust pipe; 3. a three-way valve; 4. heating the pipeline; 5. a controller; 6. an engine oil temperature sensor; 71. a heat radiation water tank; 72. a heat radiation water tank; 8. a water pump; 9. a thermostat; 10. an inlet temperature sensor; 20. an outlet temperature sensor; 30. an engine; 40. an oil pan.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1, the present embodiment provides an engine low-temperature start assist apparatus including a fuel heater 1, an exhaust main pipe 2, a three-way valve 3, and a heating pipe 4. The first end of main exhaust pipe 2 is connected with fuel oil heater 1's waste gas outlet, and three-way valve 3 includes into gas port, first export and second export, goes into the gas port and communicates with first export and with the second export alternative, goes into the gas port and is connected with main exhaust pipe 2's second end. The first end of the heating pipe 4 communicates with a first outlet, gas discharged from the second end of the heating pipe 4 can be sprayed onto the oil pan 40, and a second outlet communicates with the outside atmosphere.
According to the engine low-temperature starting auxiliary device provided by the embodiment, the waste heat generated by combustion of the fuel heater 1 can enter the exhaust main pipeline 2 through the waste gas outlet of the fuel heater 1 and is guided to the heating pipeline 4 through the three-way valve 3 to heat the engine oil in the oil pan 40, so that when the engine 30 is started at a low temperature, the heat of the waste heat generated by the fuel heater 1 can be fully utilized to heat the oil pan 40, the viscosity of the engine oil is reduced, and smooth starting of the engine 30 at the low temperature is facilitated. And after engine 30 starts, accessible three-way valve 3 communicates main exhaust pipe 2 with the second export, and the waste heat that fuel oil heater 1 burning produced is discharged to the atmosphere in, makes the engine oil temperature can not excessively rise, guarantees that engine oil can normally use.
Alternatively, the three-way valve 3 is a three-way solenoid valve, such as a conventional two-position three-way solenoid valve. The engine low-temperature starting auxiliary device further comprises an engine oil temperature sensor 6 arranged in the oil pan 40 and used for measuring the temperature of engine oil, and a controller 5 connected with the engine oil temperature sensor 6, wherein the controller 5 is connected with the three-way valve 3, and the controller 5 can control the air inlet to be communicated with the first outlet or the second outlet. Specifically, the controller 5 collects the actual engine oil temperature of the engine oil in the oil pan 40 through the engine oil temperature sensor 6, and compares the actual engine oil temperature with the preset value engine oil temperature stored in the controller 5 in advance, when the actual engine oil temperature is less than the preset engine oil temperature, the controller 5 controls the three-way solenoid valve to communicate the air inlet with the first outlet, and when the actual engine oil temperature is greater than or equal to the preset engine oil temperature, the controller 5 controls the three-way solenoid valve to communicate the air inlet with the second outlet.
Optionally, the engine low-temperature start auxiliary device further comprises a cooling system, the cooling system is used for carrying out temperature regulation on the engine 30, the fuel oil heater 1 is connected in the cooling system, and the fuel oil heater 1 is used for heating cooling liquid circulating in the cooling system. Particularly, when the engine 30 is started at a low temperature, the fuel heater 1 heats the coolant, so that the temperature of the engine 30 can be rapidly increased, and the engine 30 can be smoothly started at the low temperature.
Specifically, the cooling system includes: the water pump 8 is connected with the inlet of the radiator, the outlet of the water pump 8 is connected with the water jacket inlet of the engine 30, and the water jacket outlet of the engine 30 can be connected with the inlet of the radiator. A heating cavity 11 is arranged in the fuel oil heater 1, an inlet of the heating cavity 11 is communicated with an outlet of the water pump 8, an outlet of the heating cavity 11 can be communicated with an inlet of the radiator, and the fuel oil heater 1 is used for heating cooling liquid entering the heating cavity 11.
Preferably, the engine low-temperature start auxiliary device further comprises a thermostat 9, the thermostat 9 comprises a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet can be communicated with the first liquid outlet and the second liquid outlet alternatively, or the liquid inlet is communicated with the first liquid outlet and the second liquid outlet simultaneously; the liquid inlet is respectively communicated with the water jacket outlet of the engine 30 and the outlet of the heating cavity 11, the first liquid outlet is communicated with the inlet of the water pump 8, and the second liquid outlet is communicated with the inlet of the radiator. The thermostat 9 is prior art, and the detailed structure thereof is not described herein. When the liquid inlet of the thermostat 9 is only communicated with the first liquid outlet, the cooling liquid does not flow through the radiator at the moment, and the cooling system is in a small circulation state; when the liquid inlet is only communicated with the second liquid outlet, the cooling liquid completely flows back to the radiator at the moment, and the cooling system is in a large circulation state; when the liquid inlet of the thermostat 9 is communicated with the first liquid outlet and the second liquid outlet at the same time, the large circulation state and the small circulation state of the cooling system are opened at the same time. Wherein, the cooling system is only in a small circulation state, which facilitates the low-temperature start of the engine 30. The small circulation and the large circulation are the pipeline connection mode of the thermostat and are the prior art, and are not described herein again.
Alternatively, the radiator includes a heat-dissipating water tank 71 and a heat-dissipating fan 72 provided at one side of the heat-dissipating water tank 71, the heat-dissipating fan 72 being for cooling the heat-dissipating water tank 71.
Optionally, an inlet temperature sensor 10 is arranged at an inlet of the heating chamber 11, the inlet temperature sensor 10 is used for measuring the temperature of the cooling liquid passing through the inlet of the heating chamber 11, an outlet temperature sensor 20 is arranged at an outlet of the heating chamber 11, the outlet temperature sensor 20 is used for measuring the temperature of the cooling liquid passing through the outlet of the heating chamber 11, the inlet temperature sensor 10 and the outlet temperature sensor 20 are both connected with the controller 5, the controller 5 is further connected with the fuel injector 12 of the fuel heater 1, the controller 5 is used for controlling the opening degree of the fuel injector 12, specifically, the controller 5 can control the opening or closing of the fuel injector 12 and the opening degree of the fuel injector 12 to control the fuel injection quantity. The controller 5 acquires a difference value between the temperature values acquired by the inlet temperature sensor 10 and the outlet temperature sensor 20, then the controller 5 compares the difference value with a preset temperature difference value stored in the controller 5 in advance, the controller 5 controls the fuel injector 12 to close when the difference value is less than or equal to the preset temperature difference value, and the controller 5 controls the fuel injector 12 to open when the difference value is greater than the preset temperature difference value.
Optionally, a control valve is arranged on a connecting pipeline between the inlet of the heating cavity 11 and the outlet of the water pump 8, and the control valve is used for controlling the opening or closing of the connecting pipeline. Considering that the fuel heater 1 is required to heat the coolant only when the engine 30 is started at a low temperature, the control valve may be closed when the ambient temperature can satisfy the normal start of the engine 30.
The embodiment also provides an engine assembly, which comprises the engine 30 and the engine low-temperature starting auxiliary device in the scheme.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An engine low-temperature start assist device for heating an oil pan (40) provided on an engine (30), characterized by comprising:
a fuel heater (1);
the first end of the main exhaust pipe (2) is connected with an exhaust gas outlet of the fuel heater (1);
the three-way valve (3) comprises an air inlet, a first outlet and a second outlet, the air inlet is communicated with the first outlet and the second outlet, the air inlet is connected with the second end of the main exhaust pipeline (2), and the second outlet is communicated with the outside atmosphere;
a heating pipe (4), a first end of the heating pipe (4) is communicated with the first outlet, and gas exhausted from a second end of the heating pipe (4) can be sprayed onto the oil pan (40).
2. The engine cold start assist device according to claim 1, wherein the three-way valve (3) is a three-way solenoid valve.
3. The engine cold start assist device according to claim 2, further comprising an oil temperature sensor (6) disposed in the oil pan (40) and configured to measure a temperature of oil, and a controller (5) connected to the oil temperature sensor (6), wherein the controller (5) is connected to the three-way valve (3), and the controller (5) is configured to control the inlet to communicate with the first outlet or the second outlet.
4. The engine cold start assist device as claimed in claim 1, further comprising a cooling system for temperature regulation of the engine (30), wherein the fuel heater (1) is connected to the cooling system, and wherein the fuel heater (1) is used for heating coolant circulating in the cooling system.
5. The engine cold start assist device of claim 4, wherein the cooling system comprises: a radiator and a water pump (8), an inlet of the water pump (8) is communicated with an outlet of the radiator, an outlet of the water pump (8) is communicated with a water jacket inlet of the engine (30), and a water jacket outlet of the engine (30) can be communicated with the inlet of the radiator;
be equipped with in fuel heater (1) heating chamber (11), the entry of heating chamber (11) with the export intercommunication of water pump (8), the export of heating chamber (11) can with the entry intercommunication of radiator, fuel heater (1) are used for to getting into the coolant liquid heating in heating chamber (11).
6. The engine low-temperature start auxiliary device as claimed in claim 5, characterized in that the engine low-temperature start auxiliary device further comprises a thermostat (9), wherein the thermostat (9) comprises a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet can be communicated with the first liquid outlet and the second liquid outlet alternatively, or the liquid inlet is communicated with the first liquid outlet and the second liquid outlet simultaneously;
the liquid inlet is respectively communicated with a water jacket outlet of the engine (30) and an outlet of the heating cavity (11), the first liquid outlet is communicated with an inlet of the water pump (8), and the second liquid outlet is communicated with an inlet of the radiator.
7. The engine low-temperature start auxiliary device according to claim 6, characterized in that the radiator comprises a radiator tank (71) and a radiator fan (72) disposed on one side of the radiator tank (71), the radiator fan (72) being used for cooling the radiator tank (71).
8. The engine cold start assist device according to any one of claims 5 to 7, the engine low-temperature starting auxiliary device also comprises a controller (5), an inlet temperature sensor (10) is arranged at the inlet of the heating cavity (11), the inlet temperature sensor (10) is used for measuring the temperature of the cooling liquid passing through the inlet of the heating cavity (11), an outlet temperature sensor (20) is arranged at the outlet of the heating cavity (11), the outlet temperature sensor (20) is used for measuring the temperature of the cooling liquid passing through the outlet of the heating cavity (11), the inlet temperature sensor (10) and the outlet temperature sensor (20) are both connected with the controller (5), the controller (5) is also connected with a fuel injector (12) of the fuel heater (1), the controller (5) is used for controlling the opening degree of the fuel injector (12).
9. The engine cold start auxiliary device according to claim 5, characterized in that a control valve is arranged on a connecting pipeline between an inlet of the heating cavity (11) and an outlet of the water pump (8).
10. An engine assembly comprising an engine (30) and an engine cold start assist device as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920995072.2U CN210239775U (en) | 2019-06-28 | 2019-06-28 | Engine low-temperature starting auxiliary device and engine assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920995072.2U CN210239775U (en) | 2019-06-28 | 2019-06-28 | Engine low-temperature starting auxiliary device and engine assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963283A (en) * | 2021-03-09 | 2021-06-15 | 徐工集团工程机械股份有限公司道路机械分公司 | Engine preheating system and preheating method thereof |
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2019
- 2019-06-28 CN CN201920995072.2U patent/CN210239775U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963283A (en) * | 2021-03-09 | 2021-06-15 | 徐工集团工程机械股份有限公司道路机械分公司 | Engine preheating system and preheating method thereof |
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