CN111140417B - Engine low-pressure oil way and exhaust control device and method thereof - Google Patents
Engine low-pressure oil way and exhaust control device and method thereof Download PDFInfo
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- CN111140417B CN111140417B CN201911316348.0A CN201911316348A CN111140417B CN 111140417 B CN111140417 B CN 111140417B CN 201911316348 A CN201911316348 A CN 201911316348A CN 111140417 B CN111140417 B CN 111140417B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 178
- 239000000295 fuel oil Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000446 fuel Substances 0.000 claims description 21
- 241000190070 Sarracenia purpurea Species 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 8
- 238000010835 comparative analysis Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 3
- 239000002828 fuel tank Substances 0.000 claims 2
- 239000002283 diesel fuel Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/44—Filters structurally associated with pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/54—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by air purging means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine low-pressure oil way and an exhaust control device and method thereof, wherein the device comprises a fuel oil water heater, and the fuel oil water heater comprises a filter body, a filter base and an electric pump; an oil return port communicated with the interior of the filter body is formed in the filter seat, and a first one-way valve is arranged on an oil return pipeline communicated with the oil tank through the oil return port; a first temperature sensor is arranged on the inner wall of the top of the filter body, and a second temperature sensor is arranged on the inner wall of the bottom of the filter body; the electric pump, the first temperature sensor and the second temperature sensor are all electrically connected with the engine electronic control unit. The method comprises comparing the temperature values transmitted by the first and second temperature sensors; when the difference value exceeds a preset value, controlling the electric pump to start to discharge air; and when the difference value is within the preset range and the rail pressure reaches the preset rail pressure value, controlling the electric pump to stop working. The invention can remove air in the low-pressure oil way to prevent the air from entering the fuel oil system to influence the rotating speed of the engine and the power performance of the whole vehicle.
Description
Technical Field
The invention belongs to the technical field of engine oil supply systems, and particularly relates to a low-pressure oil way and exhaust control device and method for an engine.
Background
When the diesel vehicle is used, the fault phenomena of unstable rotating speed, flameout and the like after starting can occur sometimes; the reason for such a failure is mostly due to air leakage in the low-pressure or high-pressure oil path, which causes air bubbles in the fuel and makes the fuel supply discontinuous.
In the operation process of the diesel vehicle, fuel oil enters an engine fuel oil system from an oil outlet (a middle threaded hole) after being filtered by a filter body in a fuel oil water cold pack (integrating three functions of electric pump oil, heating paraffin removal and water removal and filtration), and a part of fuel oil needs to be accumulated in the filter body, so that sufficient fuel oil supply of a high-pressure system can be guaranteed. However, because the fuel oil water cold treasure is being used in the current market, the filter body of the fuel oil water cold treasure generally has the problem that the fuel oil can not be filled. When the oil quantity of the oil tank is insufficient, or bump and go up and down a slope occur, the low-pressure oil way sucks air, and if the oil quantity stored in the filter body is insufficient, the risk that the air enters the high-pressure oil way through the oil outlet exists at the moment.
Therefore, purging air from the fuel line, especially venting in the low pressure line, is more effective in preventing air bubbles from entering the fuel system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and the invention provides the low-pressure oil way of the engine and the exhaust control device and method thereof, which can remove air in the low-pressure oil way so as to prevent the air from entering a fuel system to influence the rotating speed of the engine and the power performance of the whole vehicle.
In order to solve the technical problem, in a first aspect, an embodiment of the present invention provides an exhaust control device for a low-pressure oil path of an engine, including a fuel water heater, where the fuel water heater includes a filter body, a filter base disposed at the top of the filter body, and an electric pump disposed on the filter base; the filter base is provided with an oil return port communicated with the interior of the filter body, the oil return port is communicated with an oil tank through an oil return pipeline, and the oil return pipeline is provided with a first one-way valve;
a first temperature sensor for monitoring the air temperature is arranged on the inner wall of the top of the filter body, and a second temperature sensor for monitoring the fuel oil temperature is arranged on the inner wall of the bottom of the filter body; the electric pump, the first temperature sensor and the second temperature sensor are all electrically connected with an engine electronic control unit.
Further, the first check valve is fixed to the filter base.
Further, the filter base is provided with an oil inlet and an oil outlet, the oil inlet is communicated with an oil inlet cavity inside the filter body, an oil outlet cavity inside the filter body is communicated with an oil inlet end of the electric pump, and an oil outlet end of the electric pump is communicated with the oil outlet;
an oil outlet cavity in the filter body is communicated with the oil outlet through a bypass pipe section, and a second one-way valve is arranged on the bypass pipe section.
Further, the filter body comprises a hollow shell and a filter element arranged in the hollow shell;
the filter core periphery wall with cavity between the cavity casing does the oil feed chamber, inside the filter core the cavity does the oil outlet chamber.
Further, a water cup assembly is arranged at the bottom of the filter body;
the water cup assembly comprises a water cup, a PTC heating sheet arranged in the water cup and a water drain valve arranged at the bottom of the water cup; the PTC heating sheet is electrically connected with the engine control unit, and the PTC heating sheet extends into the filter body.
In a second aspect, an embodiment of the present invention provides an exhaust gas control method for an engine low-pressure oil passage, using the exhaust gas control apparatus for an engine low-pressure oil passage, the exhaust gas control method including:
s1, the engine electronic control unit acquires temperature signals transmitted by the first temperature sensor and the second temperature sensor, and carries out comparative analysis;
s2, when the difference value between the first temperature sensor and the second temperature sensor exceeds a preset value, determining that air exists in the filter body, controlling the electric pump to start by the engine electric control unit, enabling the interior of the filter body to be in a positive pressure environment, and enabling the air to flow back to the oil tank through the oil return port and the oil return pipeline;
and S3, when the difference value between the first temperature sensor and the second temperature sensor is within a preset range, judging that the filter body is full of fuel oil, and the current rail pressure reaches a preset rail pressure value, and controlling the electric pump to stop working by the engine electric control unit.
Further, the exhaust gas control method further includes:
and S0, calibrating the preset value and the preset range through tests, and storing the preset value and the preset range in the engine single control unit in advance.
In a third aspect, an embodiment of the present invention provides an engine low-pressure oil path, including the exhaust gas control device of the engine low-pressure oil path.
Further, the oil inlet is communicated with the oil tank through a low-pressure oil supply pipe, and a coarse filter and a cooling disc are arranged on the low-pressure oil supply pipe;
the oil outlet is communicated with the oil inlet end of the low-pressure gear pump, and the oil outlet end of the low-pressure gear pump is communicated with the oil inlet end of the high-pressure oil pump.
Furthermore, the low-pressure oil circuit of the engine also comprises a first communication pipeline between the oil injector and the oil tank, and a second communication pipeline between the pressure limiting valve of the high-pressure common rail pipe and the oil tank.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention relates to an engine low-pressure oil way and an exhaust control device and method thereof, wherein the exhaust control device comprises a fuel oil water heater, an oil return port communicated with the interior of a filter body is arranged on a filter seat in the fuel oil water heater, the oil return port is communicated with an oil tank through an oil return pipeline, and a first one-way valve is arranged on the oil return pipeline; a first temperature sensor for monitoring the air temperature is arranged on the inner wall of the top of the filter body, and a second temperature sensor for monitoring the fuel temperature is arranged on the inner wall of the bottom of the filter body; the electric pump, the first temperature sensor and the second temperature sensor are all electrically connected with the engine electronic control unit. The exhaust control method adopting the exhaust control device comprises the steps of acquiring temperature signals transmitted by a first temperature sensor and a second temperature sensor, and carrying out comparative analysis; when the difference value of the two temperature sensors exceeds a preset value, the air is judged to be in the filter body, the engine electronic control unit controls the electric pump to be started, so that the interior of the filter body is in a positive pressure environment, and the air flows back to the oil tank through the oil return port and the oil return pipe; when the difference value of the two temperature sensors is within a preset range, the filter body is judged to be full of fuel oil, and the electric control unit of the engine controls the electric pump to stop working.
In conclusion, the invention can quickly and effectively judge whether the filter body is filled with fuel oil or not, if the filter body is not filled with fuel oil and air exists, the air can be discharged in the low-pressure oil way, and the problem that a large amount of air enters a fuel oil system due to insufficient oil quantity of an oil tank or over time and uphill and downhill in the running process of the whole vehicle is solved; the engine speed and the whole vehicle power performance are ensured.
Drawings
FIG. 1 is a schematic diagram of the low pressure oil circuit of the engine of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a flow chart of an exhaust control method of the low pressure oil circuit of the engine of the present invention;
in the figure, 1-a filter body, 11-a hollow shell, 12-a filter element, 13-an oil inlet cavity, 14-an oil outlet cavity, 15-a first temperature sensor, 16-a second temperature sensor, 2-a filter seat, 21-an oil inlet, 22-an oil outlet, 23-an oil return port, 24-an oil return pipeline, 25-a first one-way valve, 26-a bypass pipe section, 27-a second one-way valve, 3-an electric pump, 4-an oil tank, 41-a first communication pipeline, 42-a second communication pipeline, 5-a water cup assembly, 51-a water cup, 52-a PTC heating plate, 53-a water drain valve, 6-a low-pressure oil supply pipe, 61-a coarse filter, 62-a cooling disc, 7-a low-pressure gear pump, 8-a high-pressure oil pump and 9-an oil injector, 10-a high-pressure common rail pipe, a-an engine electronic control unit and b-a rail pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the description of the embodiments of the present invention is only for convenience of description and is not to be construed as limiting the invention.
It should be noted that, due to the difference in specific heat capacity, the temperature of the fuel and the temperature of the air in the same enclosed space in the same environment are different. Table 1 shows the results of measurements of the diesel fuel in the tank and the air temperature above the diesel fuel in different environments.
From experimental data, it can be derived that in a closed space of the same environment, the actual temperature of two substances, namely diesel oil and the actual temperature of the air above, are different.
The first embodiment is as follows:
as shown in fig. 1 and fig. 2, the low-pressure oil circuit of the engine disclosed in the present embodiment includes an exhaust control device, the exhaust control device mainly includes a fuel water heater, the fuel water heater includes a filter body 1, a filter base 2 disposed on the top of the filter body 1, and an electric pump 3 disposed on the filter base 2; the filter base 2 is provided with an oil return port 23 communicated with the interior of the filter body 1, the oil return port 23 is communicated with the oil tank 4 through an oil return pipeline 24, and the oil return pipeline 24 is provided with a first one-way valve 25; a first temperature sensor 15 for monitoring the air temperature is arranged on the inner wall of the top of the filter body 1, and a second temperature sensor 16 for monitoring the fuel temperature is arranged on the inner wall of the bottom of the filter body 1; the electric pump 3, the first temperature sensor 15, and the second temperature sensor 16 are all electrically connected to the engine electronic control unit a.
In this embodiment, the first check valve 25 may be directly fixed to the filter base 2, and the inlet end of the first check valve 25 is directly communicated with the oil return port 23, and the outlet end is communicated with the head end of the oil return line 24.
The filter body 1 comprises a hollow shell 11 and a filter element 12 (a water removal filter element, which is of a cylindrical structure) arranged in the hollow shell 11; the cavity between the outer peripheral wall of the filter element 12 and the hollow shell 11 is an oil inlet cavity 13, and the cavity inside the filter element 12 is an oil outlet cavity 14.
The filter base 2 is provided with an oil inlet 21 and an oil outlet 22, the oil inlet 21 (can be communicated with the oil inlet cavity 13 inside the filter base 2) is communicated with the oil inlet cavity 13 inside the filter body 1, the oil outlet cavity 14 inside the filter body 1 (can be communicated with the oil channel inside the filter base 2) is communicated with the oil inlet end of the electric pump 3, and the oil outlet end of the electric pump 3 (can be communicated with the oil channel inside the filter base 2) is communicated with the oil outlet 22. The oil outlet chamber 14 inside the filter body 1 is directly communicated with the oil outlet 22 through a bypass pipe section 26, and a second check valve 27 is arranged on the bypass pipe section 26.
The oil inlet 21 is communicated with the oil tank 4 through a low-pressure oil supply pipe 6, and a coarse filter 61 and a cooling disc 62 are arranged on the low-pressure oil supply pipe 6; the oil outlet 22 is communicated with the oil inlet end of the low-pressure gear pump 7, and the oil outlet end of the low-pressure gear pump 7 is communicated with the oil inlet end of the high-pressure oil pump 8. Besides, the low-pressure oil circuit of the engine further comprises a first communication pipeline 41 between the fuel injector 9 and the oil tank 4, and a second communication pipeline 42 between the pressure limiting valve of the high-pressure common rail pipe 10 and the oil tank 4.
The oil-burning water cold treasure work, namely the starting condition of the electric pump 3, is as follows: when the rail pressure value transmitted by the rail pressure sensor b acquired by the engine electronic control unit a is smaller than the preset rail pressure value, controlling the electric pump 3 to start, so that the rail pressure value quickly reaches the preset rail pressure value; or when the difference value between the first temperature sensor 15 and the second temperature sensor 16 exceeds a preset value, the electric pump 3 is controlled to be started to quickly remove air so as to prevent the air from entering a fuel system to influence the rotating speed of the engine and the power performance of the whole vehicle.
The electric pump 3 is controlled to stop when the rail pressure value transmitted from the rail pressure sensor b reaches a preset rail pressure value and when the difference value between the first temperature sensor 15 and the second temperature sensor 16 is within a preset range.
The electric pump 3 is started, and the path of the fuel oil is as follows: the oil tank 4, the oil inlet 21, the filter body 1, the electric pump 3, the oil outlet 22, the low-pressure gear pump 7 and the high-pressure oil pump 8; when discharging air, the electric pump 3 pumps oil, the fuel in the filter body 1 is increased, the air increases pressure due to the increase of the fuel, the first check valve 25 is opened, the air starts to be discharged, and the air (which generally flows along with the fuel) path is as follows: the filter body 1, an oil return port 23, an oil return pipe 24 and the oil tank 4. After 1 inside fuel that is full of filter body, it is the stop work of electric pump 3 promptly to burn the oil water cold precious stop work, and the route of fuel is: the oil tank 4-oil inlet 21-filter body 1-bypass pipe section 26-oil outlet 22-low pressure gear pump 7-high pressure oil pump 8.
In this embodiment, a water cup assembly 5 is further disposed at the bottom of the filter body 1 (the middle shell 11); the water cup assembly 5 comprises a water cup 51, a PTC heating sheet 52 arranged in the water cup 51 and a water drain valve 53 arranged at the bottom of the water cup 51; a liquid level alarm is also arranged in the water cup 51, and when the liquid level alarm monitors that the water amount in the water cup 51 is excessive, the alarm prompts to open the water drain valve 53 for draining water. The PTC heater chip 52 is electrically connected to the engine control unit a, and the PTC heater chip 52 protrudes into the interior of the filter body 1. When the fuel temperature is too low, the engine control unit a controls the PTC heater chip 52 to operate to perform electric heating.
Example two:
the present embodiment is an exhaust gas control method using the exhaust gas control device for the low-pressure oil passage of the engine disclosed in the first embodiment.
The exhaust gas control method includes:
and S0, calibrating the preset value and the preset range through tests, and storing the preset value and the preset range in the single control unit a of the engine in advance.
S1, the engine ecu a obtains the temperature signals transmitted by the first temperature sensor 15 and the second temperature sensor 16, and performs comparative analysis (after power-on). Meanwhile, the rail pressure signal transmitted by the rail pressure sensor b is also obtained (well known in the art and not described herein).
S2, when the difference between the first temperature sensor 15 and the second temperature sensor 16 exceeds the preset value, it is determined that air exists in the filter body 1, the engine electronic control unit a controls the electric pump 3 to start, so that the interior of the filter body 1 is in a positive pressure environment, and the air flows back to the oil tank 4 through the oil return port 23 and the oil return pipeline 24 (no matter whether the current rail pressure value transmitted by the rail pressure sensor b acquired by the engine electronic control unit a at this time is smaller than the preset rail pressure value, the engine electronic control unit a controls the electric pump 3 to start).
And S3, when the difference value between the first temperature sensor 15 and the second temperature sensor 16 is within the preset range, determining that the filter body 1 is full of fuel oil, and the current rail pressure reaches a preset rail pressure value, and controlling the electric pump 3 to stop working by the engine electronic control unit a.
When the difference between the first temperature sensor 15 and the second temperature sensor 16 is within the preset range, but the current rail pressure value transmitted by the rail pressure sensor b acquired by the engine electronic control unit a is smaller than the preset rail pressure value, the electric pump 3 is still controlled to be in the start-up operating state (this situation usually occurs when the engine is just started).
In conclusion, the invention can quickly and effectively judge whether the filter body is filled with fuel oil or not, if the filter body is not filled with fuel oil and air exists, the air can be discharged in the low-pressure oil way, and the problem that a large amount of air enters a fuel oil system due to insufficient oil quantity of an oil tank or over time and uphill and downhill in the running process of the whole vehicle is solved; the engine speed and the whole vehicle power performance are ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An exhaust control device of a low-pressure oil way of an engine comprises an oil-water-burning refrigerator, wherein the oil-water-burning refrigerator comprises a filter body, a filter seat arranged at the top of the filter body and an electric pump arranged on the filter seat; the oil filter is characterized in that an oil return port communicated with the interior of the filter body is formed in the filter base, the oil return port is communicated with an oil tank through an oil return pipeline, and a first one-way valve is arranged on the oil return pipeline;
a first temperature sensor for monitoring the air temperature is arranged on the inner wall of the top of the filter body, and a second temperature sensor for monitoring the fuel oil temperature is arranged on the inner wall of the bottom of the filter body; the electric pump, the first temperature sensor and the second temperature sensor are all electrically connected with an engine electronic control unit;
and when the engine electronic control unit electrically judges that the difference value between the first temperature sensor and the second temperature sensor exceeds a preset value, the engine electronic control unit controls the electric pump to start to discharge air.
2. The exhaust control apparatus of a low-pressure oil passage of an engine according to claim 1, wherein the first check valve is fixed to the filter holder.
3. The exhaust gas control apparatus of a low-pressure oil passage of an engine according to claim 1,
the filter base is provided with an oil inlet and an oil outlet, the oil inlet is communicated with an oil inlet cavity inside the filter body, an oil outlet cavity inside the filter body is communicated with an oil inlet end of the electric pump, and an oil outlet end of the electric pump is communicated with the oil outlet;
an oil outlet cavity in the filter body is communicated with the oil outlet through a bypass pipe section, and a second one-way valve is arranged on the bypass pipe section.
4. The exhaust gas control apparatus of a low-pressure oil passage of an engine according to claim 3, wherein the filter body includes a hollow case and a filter element provided inside the hollow case;
the filter core periphery wall with cavity between the cavity casing does the oil feed chamber, inside the filter core the cavity does the oil outlet chamber.
5. The exhaust control device of the low-pressure oil circuit of the engine as claimed in claim 1, wherein a water cup assembly is provided at the bottom of the filter body;
the water cup assembly comprises a water cup, a PTC heating sheet arranged in the water cup and a water drain valve arranged at the bottom of the water cup; the PTC heating sheet is electrically connected with the engine control unit, and the PTC heating sheet extends into the filter body.
6. An exhaust gas control method of an engine low-pressure oil passage, characterized by using the exhaust gas control apparatus of the engine low-pressure oil passage according to any one of claims 1 to 5, the exhaust gas control method comprising:
s1, the engine electronic control unit acquires temperature signals transmitted by the first temperature sensor and the second temperature sensor, and carries out comparative analysis;
s2, when the difference value between the first temperature sensor and the second temperature sensor exceeds a preset value, determining that air exists in the filter body, controlling the electric pump to start by the engine electric control unit, enabling the interior of the filter body to be in a positive pressure environment, and enabling the air to flow back to the oil tank through the oil return port and the oil return pipeline;
and S3, when the difference value between the first temperature sensor and the second temperature sensor is within a preset range, judging that the filter body is full of fuel oil, and the current rail pressure reaches a preset rail pressure value, and controlling the electric pump to stop working by the engine electric control unit.
7. The exhaust gas control method of an engine low pressure oil passage according to claim 6, characterized by further comprising:
and S0, calibrating the preset value and the preset range through tests, and storing the preset value and the preset range in the electric control unit of the engine in advance.
8. An engine low-pressure oil passage characterized by comprising the exhaust gas control apparatus of the engine low-pressure oil passage according to claim 3.
9. The low pressure oil circuit of engine as claimed in claim 8, wherein said oil inlet is connected to said oil tank by a low pressure oil supply pipe, said low pressure oil supply pipe being provided with a strainer and a cooling plate;
the oil outlet is communicated with the oil inlet end of the low-pressure gear pump, and the oil outlet end of the low-pressure gear pump is communicated with the oil inlet end of the high-pressure oil pump.
10. The engine low pressure oil circuit of claim 8, further comprising a first communication line between a fuel injector and the fuel tank, and a second communication line between a pressure limiting valve of a high pressure common rail and the fuel tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911316348.0A CN111140417B (en) | 2019-12-19 | 2019-12-19 | Engine low-pressure oil way and exhaust control device and method thereof |
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| CN201911316348.0A CN111140417B (en) | 2019-12-19 | 2019-12-19 | Engine low-pressure oil way and exhaust control device and method thereof |
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| CN111140417A CN111140417A (en) | 2020-05-12 |
| CN111140417B true CN111140417B (en) | 2021-01-19 |
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| CN111550338A (en) * | 2020-05-27 | 2020-08-18 | 平原滤清器有限公司 | Fuel filter with air detection function, fuel supply system and degassing method |
| CN114320684A (en) * | 2021-12-30 | 2022-04-12 | 南通航泰机械有限公司 | Split type fuel supply system of single-cylinder common-rail diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201016320Y (en) * | 2006-09-22 | 2008-02-06 | 陈建军 | Thermoregulation and exhaust apparatus for combustion engine fuel |
| CN201090338Y (en) * | 2007-10-31 | 2008-07-23 | 胡旭 | Preheater of oil piping system |
| JP4911199B2 (en) * | 2009-06-17 | 2012-04-04 | 株式会社デンソー | Fuel condition detection device |
| CN204900129U (en) * | 2015-07-16 | 2015-12-23 | 东风商用车有限公司 | Take fuel filter module of automatic degasification function |
| JP6587218B2 (en) * | 2017-12-19 | 2019-10-09 | マツダ株式会社 | Fuel supply device |
| CN108457781A (en) * | 2018-01-11 | 2018-08-28 | 东风商用车有限公司 | A kind of large diesel engine fuel system |
| CN109441682A (en) * | 2018-11-26 | 2019-03-08 | 潍柴动力股份有限公司 | The exhaust system and method for exhausting of low pressure oil way |
| CN209724549U (en) * | 2019-03-22 | 2019-12-03 | 潍坊辰翔动力科技有限公司 | A kind of fuel filter assembly |
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