CN105508107A - Integrated high-pressure oil pump assembly for high-pressure common-rail fuel injection system of diesel engine - Google Patents

Integrated high-pressure oil pump assembly for high-pressure common-rail fuel injection system of diesel engine Download PDF

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Publication number
CN105508107A
CN105508107A CN201610025226.6A CN201610025226A CN105508107A CN 105508107 A CN105508107 A CN 105508107A CN 201610025226 A CN201610025226 A CN 201610025226A CN 105508107 A CN105508107 A CN 105508107A
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CN
China
Prior art keywords
oil
plug sleeve
pressure
integral post
post plug
Prior art date
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Pending
Application number
CN201610025226.6A
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Chinese (zh)
Inventor
臧广辉
王雷
解芳
奚阳
李世明
杨涛
白阳
赵宇鑫
陈荫
康凯
周峰
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LIAOAYANG XINFENG TECHNOLOGY CO., LTD.
Original Assignee
Liaoning Xinfeng Enterprise Group Co Ltd
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Filing date
Publication date
Application filed by Liaoning Xinfeng Enterprise Group Co Ltd filed Critical Liaoning Xinfeng Enterprise Group Co Ltd
Priority to CN201610025226.6A priority Critical patent/CN105508107A/en
Publication of CN105508107A publication Critical patent/CN105508107A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20Varying fuel delivery in quantity or timing
    • F02M59/36Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46Valves

Abstract

The invention discloses an integrated high-pressure oil pump assembly for a high-pressure common-rail fuel injection system of a diesel engine. The assembly comprises an oil inlet metering valve, a seal steel ball, an exhaust bolt, an exhaust bolt seal washer, a tappet part, a spring seat, an oil valve part, an oil outlet spring, an oil control valve upper seat, a second O-shaped seal ring, an oil control valve tightening cap, an oil return connector, a plunger spring, a combined seal washer, an oil inlet bolt part, a plunger and barrel assembly, an overall plunger sleeve and a plunger. According to the integrated high-pressure oil pump assembly, the appearance structure is simple, compact and light, the needed installing space is small, the assembly can be flexibly matched with engines of various types on the condition of meeting the installing requirements, and the installing quantity of high-pressure oil pumps can be determined according to the number of cylinders of the engine; through design of a filtering structure, the cleanliness of diesel oil is improved, the service life of quick-wear parts is prolonged, and the failure occurrence probability is decreased; by improving a control means, the oil supply amount and pressure of the high-pressure oil pumps can be precisely controlled, and therefore the higher emission requirement is met.

Description

The high-pressure fuel injection pump assembly of integrated diesel machine high pressure common rail fuel injection system
Technical field
The invention belongs to automobile manufacturing field, relate to a kind of match equipment of diesel engine, particularly relate to a kind of use for diesel engine high pressure oil pump.
Background technique
Along with the increasingly stringent of Abgasgesetz, electric control fuel oil jet system has become the main flow of diesel fuel injection system.The electronic control technology of diesel engine is that diesel engine obtains better exhaust index, power performance and economic performance and provides realistic possibility.Monoblock pump is the important component part of monoblock pump electric control fuel oil jet system, and its technical merit directly determines reliability, power character, the Economy of end product.Therefore, what solve high pressure oil pump supplies oil-proofness, supply capability, and installability, processing cost is low, with regard to the problem having become product development to consider.
Summary of the invention
The object of the invention is to for the existing market demand, a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly of exploitation, this single cylinder pump structure is simple, compact, and processing cost is low, and it is convenient to assemble, and coupling flexibly, stablize by fuel feeding.
The object of the invention is to be achieved through the following technical solutions: the high-pressure fuel injection pump assembly of a kind of integrated diesel machine high pressure common rail fuel injection system, comprising: inlet metering valve, sealed steel ball, bleeder screw, bleeder screw seal washer, tappet parts, spring seat, fuel tap parts, oil outlet valve spring, the control fuel tap seat of honour, the 2nd O RunddichtringO, the tight cap of control fuel tap, back leakage connection, piston spring, combination seal packing ring, oil-feed bolt member, plunger coupled parts, integral post plug sleeve, plunger;
Described inlet metering valve is fixed on integral post plug sleeve by screw and spring washer, by the O RunddichtringO sealing on inlet metering valve and segmentation oil pocket; Described sealed steel ball and integral post plug sleeve interference fit seal oil circuit, prevent fuel oil from leaking outside; The mesopore of integral post plug sleeve is put at described fuel tap parts and the control fuel tap seat of honour successively, compressed by the tight cap of control fuel tap, to be threaded connection between the control tight cap of fuel tap and integral post plug sleeve and by the second seal ring sealing, bottom the oil outlet that the two ends of oil outlet valve spring are against the control fuel tap seat of honour respectively and on the steel ball of fuel tap parts; Plunger and integral post plug sleeve form plunger coupled parts after matching; Described bleeder screw and integral post plug sleeve are threaded connection and are sealed by bleeder screw seal washer, and described spring socket sleeve is in plunger head, and described parts and the spring seat low side of holding out is fitted; Described oil-feed bolt member and integral post plug sleeve are threaded connection, and seal when combination seal gasket sleeve is connected with low pressure fuel pipe joint on oil-feed bolt member; Described back leakage connection and integral post plug sleeve interference fit, by sealant sealing, structure is simple; Described piston spring is between integral post plug sleeve and spring seat, prevent plunger, piston spring and spring seat from coming off by the self-suction of plunger coupled parts, described self-suction is the negative pressure that air when press-fiting plunger coupled parts in emptying hyperbaric chamber produces, and the self-suction of described plunger coupled parts is slightly larger than the spring force of piston spring.
Further, described integral post plug sleeve is provided with exhaust structure, this exhaust structure is positioned at inlet metering valve side direction, with oil-feed bolt member on same cross section, when high pressure oil pump works first, bleeder screw need be pulled down, by emptying for the air in motor pipeline road, avoid motor owing to being vented the phenomenon freely not causing starting, also prevent air simultaneously and enter in inlet metering valve and high-pressure oil passage, avoid the cavitation of part.
Further, described integral post plug sleeve is provided with decompression oil-return groove, this decompression oil-return groove is groove structure, be communicated with oil return circuit, be positioned on integral post plug sleeve and plunger fitting surface, due to compressibility and the inertia of fuel oil, the propagation of pressure and reflection, to produce pressure wave in fuel tap parts, the hyperbaric chamber that forms between plunger and integral post plug sleeve, pressure wave is constantly decayed to reducing pressure between oil-return groove at hyperbaric chamber, is tending towards return pressure.
Further, described integral post plug sleeve is provided with counterweight auxiliary hole, because the center of gravity of integral post plug sleeve does not overlap with center, counterweight is carried out to integral post plug sleeve by counterweight auxiliary hole, solve the centre-of gravity shift phenomenon caused because integral post plug sleeve is asymmetric, ensure that the processability of part, also ensure that the demand of workpiece duplicate removal simultaneously.
Further, oil-feed bolt filter screen is provided with in described oil-feed bolt member, in inlet metering valve front end, inlet metering valve filter screen is housed, twice filtration is carried out to the diesel oil entered in integral post plug sleeve, guarantee the diesel oil cleaning degree entering high pressure oil pump, reduce the rate of fault of product, extend the working life of workpiece.
Further, described fuel tap parts are made up of valve seat, oiling valve, oiling valve spring, spring seat, snap ring and outlet valve steel ball, integrate oil-feed and oil outlet structure, and structure is simple, are convenient to install and processing.
Further, the oil circuit of described high-pressure fuel injection pump assembly, exhaust process, diesel oil enters in the oil pocket of inlet metering valve front end through the filtration of oil-feed bolt member, this oil pocket is made up of integral post plug sleeve and inlet metering valve, returns fuel tank by the exhaust port on integral post plug sleeve, working procedure, diesel oil enters in the oil pocket of inlet metering valve front end through the filtration of oil-feed bolt member, inlet metering valve is opened, diesel oil is through inlet metering valve, integral post plug sleeve and the oil circuit controlled on the fuel tap seat of honour enter the oil suction chamber of fuel tap parts, oiling valve is opened, plunger is descending, diesel oil enters the hyperbaric chamber of plunger top, plunger is up, oiling valve cuts out, outlet valve steel ball is opened, diesel oil goes out oil pocket through fuel tap parts, the tight cap of control fuel tap enters towards in the oil circuit of common rail pipe, between plunger and integral post plug sleeve, the diesel oil of seepage is through the oil-return groove that reduces pressure, back leakage connection returns fuel tank.
The invention has the beneficial effects as follows:
1. appearance structure of the present invention is simple, compact, light, volume is little, required installing space is little, is convenient to install, under the condition meeting installation requirement, can mate the motor of various type flexibly, the installation quantity of high pressure oil pump can be determined according to the cylinder number of motor;
2. design of part of the present invention is simple, has considered the difficult point in processing, has set up the process structure being convenient to process, has greatly reduced the cost of raw material and processing;
3. the design of filtration of the present invention, improves the turbidity test of diesel oil, extends the working life of easily damaged parts, reduces fault rate;
4. the present invention is by the improvement to control device, accurately can control fuel delivery and the pressure of high pressure oil pump, thus meets higher emission request;
5. the present invention is by the optimization to oil circuit, simplification, and the splicing between part, Integration Design, greatly reduce the difficulty of processing, and assembling is simple.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present invention;
Fig. 2 is structural front view of the present invention;
Fig. 3 is the structural drawing of fuel tap parts;
In figure, inlet metering valve 1, sealed steel ball 2, bleeder screw 3, bleeder screw seal washer 4, inlet metering valve filter screen 5, tappet parts 6, spring seat 7, one O RunddichtringO 8, fuel tap parts 9, oil outlet valve spring 10, the control fuel tap seat of honour 11, 2nd O RunddichtringO 12, the tight cap 13 of control fuel tap, back leakage connection 14, screw 15, spring washer 16, piston spring 17, combination seal packing ring 18, oil-feed bolt member 19, plunger coupled parts 20, integral post plug sleeve 21, plunger 22, counterweight auxiliary hole 23, decompression oil-return groove 24, exhaust structure 25, oil-feed bolt filter screen 26, valve seat 27, oiling valve 28, oiling valve spring 29, spring seat 30, snap ring 31, outlet valve steel ball 32.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, 2, a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly that the present invention proposes, comprising: inlet metering valve 1, sealed steel ball 2, bleeder screw 3, bleeder screw seal washer 4, tappet parts 6, spring seat 7, fuel tap parts 9, oil outlet valve spring 10, the control fuel tap seat of honour 11, the 2nd O RunddichtringO 12, the tight cap 13 of control fuel tap, back leakage connection 14, piston spring 17, combination seal packing ring 18, oil-feed bolt member 19, plunger coupled parts 20, integral post plug sleeve 21, plunger 22.
Described inlet metering valve 1 is fixed on integral post plug sleeve 21 by screw 15 and spring washer 16, by the O RunddichtringO sealing on inlet metering valve 1 and segmentation oil pocket; Described sealed steel ball 2 and integral post plug sleeve 21 interference fit seal oil circuit, prevent fuel oil from leaking outside; The mesopore of integral post plug sleeve 21 is put at described fuel tap parts 9 and the control fuel tap seat of honour 11 successively, compressed by the tight cap 13 of control fuel tap, be threaded connection and sealed by the second seal ring 12 between the control tight cap 13 of fuel tap and integral post plug sleeve 21, bottom the oil outlet that the two ends of oil outlet valve spring 10 are against the control fuel tap seat of honour 11 respectively and on the steel ball of fuel tap parts 9; Plunger 22 and integral post plug sleeve 21 carry out matching rear composition plunger coupled parts 20; A described O RunddichtringO 8 is for the sealing between high-pressure fuel injection pump assembly and cylinder cap, described bleeder screw 3 is threaded connection with integral post plug sleeve 21 and is sealed by bleeder screw seal washer 4, described spring seat 7 is enclosed within plunger 22 head, and described parts 6 of holding out are fitted with spring seat 7 low side; Described oil-feed bolt member 19 is threaded connection with integral post plug sleeve 21, and combination seal packing ring 18 is enclosed within when oil-feed bolt member 19 is connected with low pressure fuel pipe joint and seals; Described back leakage connection 14 and integral post plug sleeve 21 interference fit, by sealant sealing, structure is simple.
Described integral post plug sleeve 21 is provided with exhaust structure 25, this exhaust structure 25 is positioned at inlet metering valve 1 side direction, with oil-feed bolt member 19 on same cross section, when high pressure oil pump works first, bleeder screw 3 need be pulled down, by emptying for the air in motor pipeline road, avoid motor owing to being vented the phenomenon freely not causing starting, also prevent air to enter in inlet metering valve 1 and high-pressure oil passage simultaneously, avoid the cavitation of part.
Described integral post plug sleeve 21 is provided with decompression oil-return groove 24, this decompression oil-return groove 24 is groove structure, be communicated with oil return circuit, be positioned at integral post plug sleeve 21 with on plunger 22 fitting surface, due to compressibility and the inertia of fuel oil, the propagation of pressure and reflection, fuel tap parts 9, between plunger 22 and integral post plug sleeve 21 composition hyperbaric chamber in will produce pressure wave, pressure wave is constantly decayed between decompression oil-return groove 24 at hyperbaric chamber, is tending towards return pressure.
Described integral post plug sleeve 21 is provided with counterweight auxiliary hole 23, because the center of gravity of integral post plug sleeve 21 does not overlap with center, carry out counterweight to integral post plug sleeve 21 by counterweight auxiliary hole 23, solve the centre-of gravity shift phenomenon caused because integral post plug sleeve 21 is asymmetric, ensure that the processability of part, also ensure that the demand of workpiece duplicate removal simultaneously.
Described piston spring 17 is between integral post plug sleeve 21 and spring seat 7, prevent plunger 22, piston spring 17 and spring seat 7 from coming off by the self-suction of plunger coupled parts 20, described self-suction is the negative pressure that air when press-fiting plunger coupled parts 20 in emptying hyperbaric chamber produces.The self-suction of described plunger coupled parts 20 is slightly larger than the spring force of piston spring 17.
Oil-feed bolt filter screen 26 is provided with in described oil-feed bolt member 19, in inlet metering valve 1 front end, inlet metering valve filter screen 5 is housed, twice filtration is carried out to the diesel oil entered in integral post plug sleeve 21, guarantee the diesel oil cleaning degree entering high pressure oil pump, reduce the rate of fault of product, extend the working life of workpiece.
Described fuel tap parts 9 are made up of valve seat 27, oiling valve 28, oiling valve spring 29, spring seat 30, snap ring 31 and outlet valve steel ball 32, integrate oil-feed and oil outlet structure, and structure is simple, are convenient to install and processing.
The oil circuit of described high-pressure fuel injection pump assembly, exhaust process, diesel oil enters in the oil pocket of inlet metering valve 1 front end through the filtration of oil-feed bolt member 19, and this oil pocket is made up of integral post plug sleeve 21 and inlet metering valve 1, returns fuel tank by the exhaust port on integral post plug sleeve 21, working procedure, diesel oil enters in the oil pocket of inlet metering valve 1 front end through the filtration of oil-feed bolt member 19, inlet metering valve 1 is opened, diesel oil is through inlet metering valve 1, integral post plug sleeve 21 and the oil circuit controlled on the fuel tap seat of honour 11 enter the oil suction chamber of fuel tap parts 9, oiling valve 28 is opened, plunger 22 is descending, diesel oil enters the hyperbaric chamber on plunger 22 top, plunger 22 is up, oiling valve 28 cuts out, outlet valve steel ball 32 is opened, diesel oil goes out oil pocket through fuel tap parts 9, the tight cap 13 of control fuel tap enters towards in the oil circuit of common rail pipe, between plunger 22 and integral post plug sleeve 21, the diesel oil of seepage is through the oil-return groove 24 that reduces pressure, back leakage connection 14 returns fuel tank.
Working procedure of the present invention is as follows:
When high pressure oil pump works first, bleeder screw 3 need be pulled down, air in evacuate motor pipeline road.
During high pressure oil pump work, after the inlet metering valve filter screen 5 of diesel oil through the oil-feed bolt filter screen in oil-feed bolt member 19 and inlet metering valve 1 front end filters, enter inlet metering valve 1 front end, the electrical signal of outside input controls inlet metering valve 1 and opens, diesel oil enters in the oil circuit of integral post plug sleeve 21, now, spring seat 7 promotes plunger 22 and parts 6 of holding out by the spring-force driven dual of piston spring 17, and to follow live axle descending, oiling valve in fuel tap parts 9 is opened, the oil circuit of diesel oil on the control fuel tap seat of honour 11 and fuel tap parts 9 enters plunger 22 top by fuel tap parts 9, in the cavity volume that integral post plug sleeve 21 and plunger 22 surround, live axle promote tappet parts 6 and plunger 22 up, oiling valve 28 cuts out and seals with valve seat 27, and the pressure in the cavity volume of plunger 22 top raises, and outlet valve steel ball 32 is opened, the oil circuit of diesel oil on the control fuel tap seat of honour 11 and the tight cap 13 of control fuel tap enters oil pipe, completes a fuel feeding circulation, between integral post plug sleeve 21 and plunger 22, the diesel oil of seepage enters decompression oil-return groove, gets back to fuel tank by the oil circuit on integral post plug sleeve 21 through back leakage connection 14.
The present invention is applied in the oil common rail system of Light-duty Vehicle, and can mate the motor of below 50KW flexibly, fuel feeding efficiency can reach 85%, and the installation quantity of high pressure oil pump can be determined according to the cylinder number of motor.

Claims (7)

1. integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly, it is characterized in that, comprise: inlet metering valve (1), sealed steel ball (2), bleeder screw (3), bleeder screw seal washer (4), tappet parts (6), spring seat (7), fuel tap parts (9), oil outlet valve spring (10), the control fuel tap seat of honour (11), 2nd O RunddichtringO (12), the control tight cap of fuel tap (13), back leakage connection (14), piston spring (17), combination seal packing ring (18), oil-feed bolt member (19), plunger coupled parts (20), integral post plug sleeve (21), plunger (22), described inlet metering valve (1) is fixed on integral post plug sleeve (21), by the O RunddichtringO sealing on inlet metering valve (1) and segmentation oil pocket, described sealed steel ball (2) and integral post plug sleeve (21) interference fit, the mesopore of integral post plug sleeve (21) is put in described fuel tap parts (9) and the control fuel tap seat of honour (11) successively, compressed by the control tight cap of fuel tap (13), the control tight cap of fuel tap (13) and integral post plug sleeve (21) are threaded and by the second seal ring (12) sealing, with on the steel ball of fuel tap parts (9) bottom the oil outlet that the two ends of oil outlet valve spring (10) are against the control fuel tap seat of honour (11) respectively, plunger (22) and integral post plug sleeve (21) form plunger coupled parts (20) after matching, described bleeder screw (3) and integral post plug sleeve (21) are threaded connection and are sealed by bleeder screw seal washer (4), described spring seat (7) is enclosed within plunger (22) head, and described parts of holding out (6) and spring seat (7) low side are fitted, described oil-feed bolt member (19) is threaded with integral post plug sleeve (21), and combination seal packing ring (18) is enclosed within oil-feed bolt member (19), described back leakage connection (14) and integral post plug sleeve (21) interference fit, described piston spring (17) is placed between integral post plug sleeve (21) and spring seat (7).
2. a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly according to claim 1, it is characterized in that, described integral post plug sleeve (21) is provided with exhaust structure (25), this exhaust structure (25) is positioned at inlet metering valve (1) side direction, with oil-feed bolt member (19) on same cross section, when high pressure oil pump works first, bleeder screw (3) need be pulled down, by emptying for the air in motor pipeline road.
3. a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly according to claim 1, it is characterized in that, be provided with oil-feed bolt filter screen (26) in described oil-feed bolt member (19), in inlet metering valve (1) front end, inlet metering valve filter screen (5) be housed.
4. a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly according to claim 1, it is characterized in that, described integral post plug sleeve (21) is provided with counterweight auxiliary hole (23), carries out counterweight by counterweight auxiliary hole (23) to integral post plug sleeve (21).
5. a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly according to claim 1, it is characterized in that, described integral post plug sleeve (21) is provided with decompression oil-return groove (24), this decompression oil-return groove (24) is groove structure, be communicated with oil return circuit, be positioned at integral post plug sleeve (21) with on plunger (22) fitting surface.
6. a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly according to claim 5, it is characterized in that, described fuel tap parts (9) are made up of valve seat (27), oiling valve (28), oiling valve spring (29), spring seat (30), snap ring (31) and outlet valve steel ball (32).
7. a kind of integrated diesel machine high pressure common rail fuel injection system high-pressure fuel injection pump assembly according to claim 6, it is characterized in that, the oil circuit of described high-pressure fuel injection pump assembly, exhaust process, diesel oil enters in the oil pocket of inlet metering valve (1) front end through the filtration of oil-feed bolt member (19), this oil pocket is made up of integral post plug sleeve (21) and inlet metering valve (1), returns fuel tank by the exhaust port on integral post plug sleeve (21), working procedure, diesel oil enters in the oil pocket of inlet metering valve (1) front end through the filtration of oil-feed bolt member (19), inlet metering valve (1) is opened, diesel oil is through inlet metering valve (1), integral post plug sleeve (21) and the oil circuit controlled on the fuel tap seat of honour (11) enter the oil suction chamber of fuel tap parts (9), oiling valve (28) is opened, plunger (22) is descending, diesel oil enters the hyperbaric chamber on plunger (22) top, plunger (22) is up, oiling valve (28) cuts out, outlet valve steel ball (32) is opened, diesel oil goes out oil pocket through fuel tap parts (9), the control tight cap of fuel tap (13) enters towards in the oil circuit of common rail pipe, between plunger (22) and integral post plug sleeve (21), the diesel oil of seepage is through the oil-return groove (24) that reduces pressure, back leakage connection (14) returns fuel tank.
CN201610025226.6A 2016-01-14 2016-01-14 Integrated high-pressure oil pump assembly for high-pressure common-rail fuel injection system of diesel engine Pending CN105508107A (en)

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Publication number Priority date Publication date Assignee Title
CN105822476A (en) * 2016-05-25 2016-08-03 辽阳新风科技有限公司 High-pressure oil pump with oil inlet valve and diesel engine
CN105863917A (en) * 2016-05-25 2016-08-17 辽阳新风科技有限公司 High-pressure oil pump with electromagnetic valve and diesel engine
CN111997800A (en) * 2020-08-19 2020-11-27 山东鑫亚工业股份有限公司 Horizontal high-pressure common rail fuel feed pump for diesel engine

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CN105822476A (en) * 2016-05-25 2016-08-03 辽阳新风科技有限公司 High-pressure oil pump with oil inlet valve and diesel engine
CN105863917A (en) * 2016-05-25 2016-08-17 辽阳新风科技有限公司 High-pressure oil pump with electromagnetic valve and diesel engine
CN111997800A (en) * 2020-08-19 2020-11-27 山东鑫亚工业股份有限公司 Horizontal high-pressure common rail fuel feed pump for diesel engine

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