CN110905658A - Pressure diagnosis device and method for high-pressure branch of mobile diesel engine - Google Patents
Pressure diagnosis device and method for high-pressure branch of mobile diesel engine Download PDFInfo
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- CN110905658A CN110905658A CN201911100590.4A CN201911100590A CN110905658A CN 110905658 A CN110905658 A CN 110905658A CN 201911100590 A CN201911100590 A CN 201911100590A CN 110905658 A CN110905658 A CN 110905658A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000003745 diagnosis Methods 0.000 title abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 239000002283 diesel fuel Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 2
- 238000011897 real-time detection Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 88
- 238000012423 maintenance Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- 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
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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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/006—Measuring or detecting fuel leakage of fuel injection apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a pressure diagnosis device and a pressure diagnosis method for a high-pressure shunt of a mobile diesel engine under working conditions. The method comprises the steps of judging whether leakage exists through a pressure gauge after a plurality of valves are closed, and if the leakage exists, overhauling is carried out; sequentially opening the valves, judging whether leakage positions exist in the corresponding valves through the pressure gauge, and if so, repairing until no pressure leakage exists after the valves are fully opened; starting an engine control module to dynamically control the oil nozzles, and checking the oil injection sequence and the oil injection working condition of a plurality of oil nozzles through a test box; after the engine is confirmed to be intact, the oil nozzle is mounted on the engine, and then the diesel engine can be normally started.
Description
Technical Field
The invention relates to the technical field of transportation, in particular to a pressure diagnosis device and method for a high-pressure shunt circuit of a movable diesel engine.
Background
At present, large vehicles used in metallurgical plants are mainly responsible for transporting goods in the plants, most of the engines used by the vehicles are diesel engines, most of the oil inlet systems of the diesel engines adopt a high-pressure common rail technology, and the principle of the high-pressure common rail technology is that one high-pressure common rail pipeline provides high-pressure diesel oil for six or eight oil nozzles of the engines to be used together. When the vehicle is used, the fault of the diesel pipeline of the engine occurs occasionally, the diesel pipeline of the vehicle is generally long, particularly, the high-pressure pipeline of the vehicle is arranged in the engine, and the installation mode is arranged according to the structure of the engine, so that the visual observation cannot be carried out. The engine high-pressure diesel oil leaks for many reasons, such as oil leakage of a pipeline joint, oil leakage of a pipeline crack, oil leakage caused by aging damage of a sealing ring, oil leakage fault caused by cracks in an engine cylinder body and the like, and the vehicle cannot be started to run after the high-pressure diesel oil leaks due to the oil leakage faults.
Because of the particularity of the high-pressure common rail of the diesel engine, high-pressure oil established by the high-pressure pump passes through the high-pressure common rail and is distributed to each oil injection nozzle of the engine, and the pressure of the high-pressure common rail can be leaked due to the leakage of one oil circuit or one oil injection nozzle, so that the vehicle cannot be started and operated. In the process of searching for the fault, the specific part of the fault cannot be effectively positioned, and the fault can be judged and repaired only by simply depending on the overhaul experience. If a plurality of oil nozzles and related components thereof have problems at the same time, the situation that the faults cannot be checked or the problems cannot be effectively solved after the faults are repeatedly repaired occurs. Although a normal high-pressure pump experiment table is available in the market at present, the normal high-pressure pump experiment table can detect a high-pressure pump and an oil injection nozzle, but the normal high-pressure pump experiment table cannot move, so that the detection on the integrity of a vehicle-mounted high-pressure pump, the integrity of the oil injection nozzle and related components of the vehicle-mounted high-pressure pump, the oil injection nozzle and the related components of the vehicle-mounted high-pressure pump, the oil.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pressure diagnosis device and a pressure diagnosis method for a high-pressure shunt of a movable diesel engine.
In order to solve the technical problems, the pressure diagnosis device of the high-pressure branch of the mobile diesel engine comprises a vehicle-mounted diesel tank, a diesel filter element, a high-pressure pump, a high-pressure common rail pipeline, an engine control module and a plurality of oil nozzles, wherein the input end of the high-pressure pump is sequentially connected with the diesel filter element and the vehicle-mounted diesel tank, the output end of the high-pressure pump is connected with the input interface of the high-pressure common rail pipeline, a plurality of control ends of the engine control module are respectively connected with the control ends of electromagnetic valves of the oil nozzles, the device also comprises a plurality of valves, a pressure gauge and a test box, a plurality of high-pressure distribution ports of the high-pressure common rail pipeline are respectively connected with oil supply ports of the oil nozzles through the valves, the pressure gauge is arranged on the high-pressure common rail pipeline and detects the oil pressure in an, the vehicle-mounted diesel tank is connected with the test box through an oil return pipe.
Furthermore, the front panel of the test box is a transparent plate which is convenient for observing the oil injection conditions of the oil injection nozzles.
The pressure diagnosis method of the high-pressure branch of the mobile diesel engine based on the diagnosis device comprises the following steps:
connecting an oil inlet pipe of a high-pressure common rail pipeline with an oil outlet pipe of a high-pressure pump of a diesel engine of a fault vehicle, and confirming that the connection is effective; installing a plurality of oil nozzles of a diesel engine of a fault vehicle into a detection hole of a test box, respectively connecting the oil nozzles with a plurality of high-pressure distribution ports of a high-pressure common rail pipeline through valves, synchronously confirming the installation of a connecting oil pipe, and respectively connecting electromagnetic valve control ends of the oil nozzles to a plurality of control ends of an engine control module;
step two, closing a plurality of valves, starting a vehicle, converting low-pressure diesel into high-pressure diesel by a high-pressure pump through a diesel tank and a diesel filter core, inputting the high-pressure diesel into a high-pressure common rail pipeline, checking the reading of a pressure gauge, detecting after the pressure is correct, and otherwise, overhauling the high-pressure pump, the diesel tank, the diesel filter core and a connecting pipeline;
step three, opening a plurality of valves in sequence, checking the reading of the pressure gauge, and indicating that no leakage part exists, wherein the reading is normal; if the reading is low, the pressure leakage exists in the pipeline corresponding to the opened valve, the related parts of the oil pipe and the oil nozzle are checked and repaired, and the vehicle is started to recheck the reading of the pressure gauge after the repair until the valves are fully opened and no pressure leakage exists;
step four, starting an engine control module to dynamically control electromagnetic valves of a plurality of oil nozzles, checking the oil injection sequence of the oil nozzles and the oil injection working conditions of the oil nozzles through a test box, and enabling diesel oil sprayed by the oil nozzles to flow back to a diesel oil tank through an oil return pipe in the test box;
and step five, after the oil injection sequence and the oil injection working condition of the oil injection nozzles are confirmed to be intact, the oil injection nozzles and the valves are disassembled from the test box and then are installed on the original vehicle engine, and the diesel engine can be normally started after the oil injection nozzles and the valves are installed and confirmed to be correct.
The invention adopts the technical scheme that the input end of a high-pressure pump in the device is sequentially connected with a diesel filter element and a vehicle-mounted diesel tank, the output end of the high-pressure pump is connected with an input interface of a high-pressure common rail pipeline, a plurality of control ends of an engine control module are connected with electromagnetic valve control ends of a plurality of oil nozzles, a plurality of high-pressure distribution ports of the high-pressure common rail pipeline are respectively connected with oil supply ports of the plurality of oil nozzles through valves, a pressure gauge is arranged on the high-pressure common rail pipeline and detects the oil pressure in an inner cavity of the high-pressure common rail pipeline in real time, a plurality of detection holes are formed in the surface of a test box at intervals, the plurality of oil nozzles. After closing a plurality of valves, checking the reading of a pressure gauge to determine whether leakage exists, and if so, carrying out maintenance; the valves are opened in sequence, whether the corresponding valves have leakage parts is judged through the reading of the pressure gauge, if yes, the valves are repaired until no pressure leakage exists after the valves are fully opened; starting an engine control module to dynamically control a plurality of oil nozzles, and checking the oil injection sequence and the oil injection working condition of the oil nozzles through a test box; after the diesel engine is confirmed to be intact, the diesel engine can be normally started by installing a plurality of oil nozzles on the diesel engine. The device can be conveniently installed on a vehicle to carry out real-time dynamic detection, visually displays the change of the high-pressure shunt pressure of the diesel engine, is convenient for visually checking the working condition of the oil nozzle, conveniently searches and solves the leakage fault of a high-pressure pipeline, and improves the fault maintenance efficiency.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic structural diagram of a pressure diagnostic device of a high-pressure branch of a mobile diesel engine according to the present invention;
FIG. 2 is a block flow diagram of the method.
Detailed Description
The embodiment of the invention is shown in figure 1, the pressure diagnosis device of the high-pressure branch of the mobile diesel engine comprises a vehicle-mounted diesel oil tank 1, a diesel oil filter element 2, a high-pressure pump 3, a high-pressure common rail pipeline 4, an engine control module 5 and a plurality of oil nozzles 6, wherein the input end of the high-pressure pump 3 is sequentially connected with the diesel oil filter element 2 and the vehicle-mounted diesel oil tank 1, the output end of the high-pressure pump is connected with the input interface of the high-pressure common rail pipeline 4, a plurality of control ends of the engine control module 5 are respectively connected with the control ends of electromagnetic valves 61 of the plurality of oil nozzles 6, the device also comprises a plurality of valves 7, a pressure gauge 8 and a test box 9, a plurality of high-pressure distribution ports of the high-pressure common rail pipeline 4 are respectively connected with the oil supply ports of the plurality of oil nozzles 6 through the valves 7, the plurality of oil nozzles 6 are respectively arranged in the plurality of detection holes 91, and the vehicle-mounted diesel tank 1 is connected with the test box 9 through an oil return pipe 11.
Preferably, the front panel 92 of the test chamber 9 is a transparent panel for facilitating observation of the condition of the oil injected from the plurality of oil injectors 6.
As shown in fig. 2, a method for diagnosing the pressure of the high-pressure branch of the mobile diesel engine based on the diagnosis device comprises the following steps:
connecting an oil inlet pipe of a high-pressure common rail pipeline with an oil outlet pipe of a high-pressure pump of a diesel engine of a fault vehicle, and confirming that the connection is effective; installing a plurality of oil nozzles of a diesel engine of a fault vehicle into a detection hole of a test box, respectively connecting the oil nozzles with a plurality of high-pressure distribution ports of a high-pressure common rail pipeline through valves, synchronously confirming the installation of a connecting oil pipe, and respectively connecting electromagnetic valve control ends of the oil nozzles to a plurality of control ends of an engine control module;
step two, closing a plurality of valves, starting a vehicle, converting low-pressure diesel into high-pressure diesel by a high-pressure pump through a diesel tank and a diesel filter core, inputting the high-pressure diesel into a high-pressure common rail pipeline, checking the reading of a pressure gauge, detecting after the pressure is correct, and otherwise, overhauling the high-pressure pump, the diesel tank, the diesel filter core and a connecting pipeline;
step three, opening a plurality of valves in sequence, checking the reading of the pressure gauge, and indicating that no leakage part exists, wherein the reading is normal; if the reading is low, the pressure leakage exists in the pipeline corresponding to the opened valve, the related parts of the oil pipe and the oil nozzle are checked and repaired, and the vehicle is started to recheck the reading of the pressure gauge after the repair until the valves are fully opened and no pressure leakage exists;
step four, starting an engine control module to dynamically control electromagnetic valves of a plurality of oil nozzles, checking the oil injection sequence of the oil nozzles and the oil injection working conditions of the oil nozzles through a test box, and enabling diesel oil sprayed by the oil nozzles to flow back to a diesel oil tank through an oil return pipe in the test box;
and step five, after the oil injection sequence and the oil injection working condition of the oil injection nozzles are confirmed to be intact, the oil injection nozzles and the valves are disassembled from the test box and then are installed on the original vehicle engine, and the diesel engine can be normally started after the oil injection nozzles and the valves are installed and confirmed to be correct.
In practical application, firstly, a valve between a high-pressure common rail pipeline and an oil nozzle is closed, then a vehicle is started, fuel oil in an oil tank is sucked out from the oil tank through a high-pressure pump and enters the high-pressure common rail pipeline after passing through a filter element, whether high pressure in the high-pressure common rail pipeline is normal or not is judged through a pressure gauge, if the high pressure in the high-pressure common rail pipeline is abnormal, faults such as leakage, blockage and the like of the oil tank, the filter element, the high-pressure pump and a pipeline and a connector between the oil tank and the; if normal, open the valve one by one, observe the change of manometer, can accurately judge whether each fuel sprayer has the leakage phenomenon to find the leakage point fast and investigate and resume, confirm system pressure normal back, install the fuel sprayer again and can start the vehicle.
The device and the method can purposefully and accurately detect the diesel engine, thereby improving the overhauling efficiency and quality; the shutdown maintenance time of the diesel engine is shortened, and the operating utilization rate of the travelling crane is improved; and spare part cost input is reduced, and the maintenance mode is more optimized.
Claims (3)
1. The utility model provides a pressure diagnostic device along separate routes of portable diesel engine high pressure, includes on-vehicle diesel tank, diesel filter core, high-pressure pump, high pressure and shares rail line way, engine control module and a plurality of fuel sprayer, the high-pressure pump input end connects gradually diesel filter core and on-vehicle diesel tank, output are connected high pressure shares rail line way input interface, the solenoid valve control end of a plurality of fuel sprayers is connected respectively to a plurality of control ends of engine control module, its characterized in that: this device still includes a plurality of valves, manometer and proof box, a plurality of high pressure distribution ports of high pressure common rail pipeline pass through respectively the valve is connected the fuel feeding port of a plurality of fuel sprayer, the manometer is located high pressure common rail pipeline and real-time detection high pressure common rail pipeline inner chamber oil pressure, a plurality of inspection holes are seted up at proof box surface interval, a plurality of fuel sprayer are installed respectively in a plurality of inspection holes, adopt back oil pipe to connect between on-vehicle diesel tank and the proof box.
2. The pressure diagnostic apparatus of a high pressure branch of a mobile diesel engine according to claim 1, wherein: the front panel of the test box is a transparent plate which is convenient for observing the oil injection conditions of the oil injection nozzles.
3. A method for diagnosing the pressure of a high-pressure branch of a mobile diesel engine based on the diagnostic device of any one of claims 1 or 2, comprising the steps of:
connecting an oil inlet pipe of a high-pressure common rail pipeline with an oil outlet pipe of a high-pressure pump of a diesel engine of a fault vehicle, and confirming that the connection is effective; installing a plurality of oil nozzles of a diesel engine of a fault vehicle into a detection hole of a test box, respectively connecting the oil nozzles with a plurality of high-pressure distribution ports of a high-pressure common rail pipeline through valves, synchronously confirming the installation of a connecting oil pipe, and respectively connecting electromagnetic valve control ends of the oil nozzles to a plurality of control ends of an engine control module;
step two, closing a plurality of valves, starting a vehicle, converting low-pressure diesel into high-pressure diesel by a high-pressure pump through a diesel tank and a diesel filter core, inputting the high-pressure diesel into a high-pressure common rail pipeline, checking the reading of a pressure gauge, detecting after the pressure is correct, and otherwise, overhauling the high-pressure pump, the diesel tank, the diesel filter core and a connecting pipeline;
step three, opening a plurality of valves in sequence, checking the reading of the pressure gauge, and indicating that no leakage part exists, wherein the reading is normal; if the reading is low, the pressure leakage exists in the pipeline corresponding to the opened valve, the related parts of the oil pipe and the oil nozzle are checked and repaired, and the vehicle is started to recheck the reading of the pressure gauge after the repair until the valves are fully opened and no pressure leakage exists;
step four, starting an engine control module to dynamically control electromagnetic valves of a plurality of oil nozzles, checking the oil injection sequence of the oil nozzles and the oil injection working conditions of the oil nozzles through a test box, and enabling diesel oil sprayed by the oil nozzles to flow back to a diesel oil tank through an oil return pipe in the test box;
and step five, after the oil injection sequence and the oil injection working condition of the oil injection nozzles are confirmed to be intact, the oil injection nozzles and the valves are disassembled from the test box and then are installed on the original vehicle engine, and the diesel engine can be normally started after the oil injection nozzles and the valves are installed and confirmed to be correct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911100590.4A CN110905658A (en) | 2019-11-12 | 2019-11-12 | Pressure diagnosis device and method for high-pressure branch of mobile diesel engine |
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| CN201911100590.4A CN110905658A (en) | 2019-11-12 | 2019-11-12 | Pressure diagnosis device and method for high-pressure branch of mobile diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520268A (en) * | 2020-04-29 | 2020-08-11 | 河南柴油机重工有限责任公司 | Pre-pressurizing device, pressure building method and cleaning method of high-pressure common rail diesel engine |
| CN116498264A (en) * | 2023-06-30 | 2023-07-28 | 北京万普瑞能源技术有限公司 | Shale gas well trial production integrated fine pressure control process |
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| CN106523226A (en) * | 2016-12-09 | 2017-03-22 | 上海扬发动力有限公司 | Diesel engine high-pressure common rail system |
| CN108930622A (en) * | 2017-05-23 | 2018-12-04 | 宝山钢铁股份有限公司 | Mobile diesel engine high pressure branch pressure universal diagnostic device and diagnostic method |
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2019
- 2019-11-12 CN CN201911100590.4A patent/CN110905658A/en active Pending
Patent Citations (3)
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| CN204663734U (en) * | 2015-05-27 | 2015-09-23 | 江峰 | A kind of high pressure co-rail system diesel spray characteristic detection and test device |
| CN106523226A (en) * | 2016-12-09 | 2017-03-22 | 上海扬发动力有限公司 | Diesel engine high-pressure common rail system |
| CN108930622A (en) * | 2017-05-23 | 2018-12-04 | 宝山钢铁股份有限公司 | Mobile diesel engine high pressure branch pressure universal diagnostic device and diagnostic method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111520268A (en) * | 2020-04-29 | 2020-08-11 | 河南柴油机重工有限责任公司 | Pre-pressurizing device, pressure building method and cleaning method of high-pressure common rail diesel engine |
| CN116498264A (en) * | 2023-06-30 | 2023-07-28 | 北京万普瑞能源技术有限公司 | Shale gas well trial production integrated fine pressure control process |
| CN116498264B (en) * | 2023-06-30 | 2023-09-15 | 北京万普瑞能源技术有限公司 | Shale gas well trial production integrated fine pressure control process |
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Application publication date: 20200324 |