CN106555678B - Oil supply device for pump nozzle of diesel engine - Google Patents
Oil supply device for pump nozzle of diesel engine Download PDFInfo
- Publication number
- CN106555678B CN106555678B CN201611102205.6A CN201611102205A CN106555678B CN 106555678 B CN106555678 B CN 106555678B CN 201611102205 A CN201611102205 A CN 201611102205A CN 106555678 B CN106555678 B CN 106555678B
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- Prior art keywords
- oil
- pump nozzle
- oil injection
- rocker arm
- control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
- F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
- F02D2001/082—Transmission of control impulse to pump control, e.g. with power drive or power assistance electric
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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)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
The invention discloses an oil supply device for a pump nozzle of a diesel engine, which comprises a camshaft chamber, an oil injection camshaft, an oil injection rocker arm and a pump nozzle, wherein a fuel oil control electromagnetic valve and an oil injection timing mechanism are arranged on the outer side surface of the camshaft chamber, an oil quantity control rod and an oil injection rocker arm eccentric shaft are arranged in the camshaft chamber, the fuel oil control electromagnetic valve drives the oil quantity control rod to move longitudinally to push a rack on the pump nozzle to move so as to realize the control of oil injection quantity, the oil injection timing mechanism is connected with the oil injection rocker arm eccentric shaft through a connecting rod mechanism with a driving rod, the movement of the driving rod is converted into the rotation of the oil injection rocker arm eccentric shaft, and a displacement sensor detects the moving position of the driving rod and is linked with a proportional electromagnetic valve so as to realize the accurate control of the oil injection timing of the pump nozzle. The invention drives the eccentric shaft of the oil injection rocker arm through the oil injection timing mechanism, adjusts the oil injection advance angle, and controls the position of the pump nozzle throttle by using the fuel oil control electromagnetic valve, thereby realizing the accurate control of the oil injection quantity and the oil injection timing under all working conditions of the engine.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a diesel engine pump nozzle oil supply device for fuel injection.
Background
The existing pump nozzle diesel engine generally adopts a mechanical pump nozzle or an electric control pump nozzle. The mechanical pump nozzle is composed of an oil injection quantity adjusting mechanism and an injection mechanism, the oil injection pressure can reach 1600bar or even higher, but the mechanical pump nozzle usually only simply realizes oil quantity control and cannot directly reach Euro III and above emission standards. The oil sprayer of the electric control monoblock pump is provided with an independent oil pump, integrates the opening time and the duration of the solenoid valve to control the needle valve, can be flexibly adjusted, can realize multiple spraying in one working cycle process according to requirements, but has complex structure and high manufacturing and maintenance cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the diesel engine pump nozzle oil supply device overcomes the defects in the prior art and can realize accurate control of the oil injection quantity and the oil injection timing under all working conditions of the engine.
The technical scheme adopted by the invention for solving the technical problems is as follows: a fuel supply device for a pump nozzle of a diesel engine comprises a camshaft chamber, a fuel injection camshaft arranged in the camshaft chamber, and a pump nozzle arranged on the outer side surface of the camshaft chamber and used for injecting fuel, wherein a fuel injection rocker arm used for realizing fuel injection of the pump nozzle is arranged between the fuel injection camshaft and the pump nozzle, a fuel control electromagnetic valve and a fuel injection timing mechanism are arranged on the outer side surface of the camshaft chamber, a fuel control rod and a fuel injection rocker arm eccentric shaft which are parallel to the fuel injection camshaft are arranged in the camshaft chamber, the fuel control electromagnetic valve drives the fuel control rod to move longitudinally and pushes a rack on the pump nozzle to move so as to realize control over the fuel injection quantity of the pump nozzle, the fuel injection timing mechanism is provided with a timing driver, a displacement sensor and a proportional electromagnetic valve, the fuel injection timing mechanism is connected with the fuel injection rocker arm eccentric shaft through a connecting rod mechanism with a driving rod, the timing driver pushes the driving rod to move so as to realize rotation of the fuel injection rocker arm eccentric shaft, and the displacement sensor detects the movement position of the driving rod and feeds back to an ECU of an engine and is linked with the proportional electromagnetic valve so as to realize accurate control over the fuel injection timing of the pump nozzle.
Specifically speaking, the fuel control solenoid valve have position sensor and electronic actuator, the oil mass control pole has oil mass control shift fork and propulsion shift fork, electronic actuator promotes the removal of oil mass control shift fork and realizes the removal of oil mass control pole, along with the propulsion shift fork drive rack removal that the oil mass control pole removed, position sensor on be connected with the displacement volume that detects electronic actuator and feed back to ECU's follower lever.
The connecting rod mechanism comprises a driving rod connected with the timing driver, a driving arm assembly and a connecting rod, wherein two ends of the connecting rod are respectively connected with the driving rod and the driving arm assembly, and the driving arm assembly is fixedly connected with the eccentric shaft of the oil injection rocker arm.
Furthermore, the timing driver is provided with a hydraulic valve rod which is connected with the driving rod and is controlled to be opened and closed by the proportional electromagnetic valve, a return spring which is sleeved on the driving rod, and a check valve which provides oil pressure through an engine oil pump and overcomes the elastic force of the return spring, and a position magnet which is used for detecting the moving position of the driving rod by a displacement sensor is arranged on the side surface of the check valve.
Preferably, in order to realize the oil injection of the pump nozzle, the oil injection rocker arm is arranged on the eccentric shaft of the oil injection rocker arm, the mounting axis of the oil injection rocker arm and the mounting axis of the camshaft chamber have an eccentricity e, one end of the oil injection rocker arm is in contact with the oil injection camshaft, and the other end of the oil injection rocker arm is pressed on a spring seat arranged at the upper end part of the pump nozzle.
The invention has the beneficial effects that: the fuel control solenoid valve drives the accelerator control rod to move longitudinally, so as to drive the rack on the pump nozzle to move, control of the fuel injection quantity of the pump nozzle is realized, the fuel injection timing mechanism is connected with the eccentric shaft of the fuel injection rocker arm through the connecting rod mechanism, the axial movement of the driving rod is converted into circumferential rotation of the eccentric shaft of the fuel injection rocker arm, and the fuel injection timing device is controlled by the proportional solenoid valve to push the driving rod to be fixed at any position in a specified range, so that the effective eccentricity of the fuel injection rocker arm is finally controlled, and the whole-process regulation and control of the fuel injection advance angle is realized.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the view E in fig. 1 after being rotated ninety degrees.
Fig. 3 is a view from direction F of fig. 2.
FIG. 4 is a schematic sectional view of B-B in FIG. 3.
In the figure, 1, an oil injection rocker arm eccentric shaft 2, an oil injection cam shaft 3, an oil injection rocker arm 4, a pump nozzle 5, a displacement sensor 6, a timing driver 7, a proportional solenoid valve 8, a position sensor 9, an electronic actuator 10 and an oil mass control rod 11, propulsion fork 12, rack 13, driving rod 14, connecting rod 15, driving arm assembly 16, oil control fork 17, camshaft chamber 18, hydraulic valve rod 19, check valve 20, return spring 21, position magnet 22 and follower rod
Detailed Description
The invention will now be further described with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams each illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.
The diesel engine pump nozzle oil supply device shown in fig. 1-4 comprises a camshaft chamber 17, an oil injection camshaft 2 installed in the camshaft chamber 17, and a pump nozzle 4 installed on the inner side surface of the camshaft chamber 17 and used for injecting fuel oil, wherein an oil injection rocker arm 3 used for realizing oil injection of the pump nozzle 4 is arranged between the oil injection camshaft 2 and the pump nozzle 4, one end of the oil injection rocker arm 3 is in surface contact with the oil injection camshaft 2, the other end of the oil injection rocker arm 3 is connected to the upper end part of the pump nozzle 4 and pressed on a spring seat at the upper end part of the pump nozzle 4, the oil injection rocker arm 3 is driven to swing through rotation of the oil injection camshaft 2, and the spring seat is pressed or loosened to realize oil injection of the pump nozzle 4.
The fuel control electromagnetic valve and the fuel injection timing mechanism are respectively installed on the outer side surface of the camshaft chamber 17, an oil quantity control rod 10 and an oil injection rocker arm eccentric shaft 1 which are parallel to an oil injection camshaft 2 are arranged in the camshaft chamber 17, an oil quantity control shifting fork 16 and a propulsion shifting fork 11 are arranged on the oil quantity control rod 10, the oil quantity control shifting fork 16 is connected with the fuel control electromagnetic valve to drive the whole oil quantity control rod 10 to axially move, the number of the propulsion shifting forks 11 can be determined according to the number of cylinders of an engine to synchronously drive the oil injection quantity of the nozzles 4 of the cylinder pumps, and a guide groove capable of limiting the circumferential rotation of the oil quantity control rod 10 is formed in the oil quantity control rod; when the oil injection rocker arm eccentric shaft 1 is installed, a clamping groove is processed on the inner side of the outermost support arm installed in the camshaft chamber 17, the oil injection rocker arm eccentric shaft 1 is axially positioned by using the elastic retainer ring, the oil injection rocker arm 3 is installed on the oil injection rocker arm eccentric shaft 1, and the installation axis of the oil injection rocker arm 3 and the installation axis of the camshaft chamber 17 have an eccentricity e.
The fuel control solenoid valve comprises a position sensor 8 and an electronic actuator 9, the fuel control solenoid valve is installed on the outer side of a camshaft chamber 17 through four bolts, the electronic actuator 9 pushes an oil quantity control shifting fork 16 to move through a check ring, and then longitudinal movement of an oil quantity control rod 10 is achieved, a pushing shifting fork 11 moving along with the oil quantity control rod 10 drives a rack 12 on a pump nozzle 4 to move so as to achieve control over oil injection quantity of the pump nozzle 4, and the position sensor 8 is connected with a follow-up rod 22 which is used for detecting displacement of the electronic actuator 9 and feeding back the displacement to an ECU.
The oil injection timing mechanism comprises a timing driver 6, a displacement sensor 5 and a proportional solenoid valve 7, the oil injection timing mechanism is connected with an oil injection rocker arm eccentric shaft 1 through a connecting rod mechanism, specifically, the connecting rod mechanism comprises a driving rod 13 connected with the timing driver 6, a driving arm assembly 15 and a connecting rod 14, two ends of the connecting rod 14 are respectively connected with the driving rod 13 and the driving arm assembly 15, and the driving arm assembly 15 is fixedly connected with the oil injection rocker arm eccentric shaft 1.
The timing driver 6 is provided with a hydraulic valve rod 18 which is connected with the driving rod 13 and is controlled to open and close by the proportional electromagnetic valve 7, a return spring 20 which is sleeved on the driving rod 13 and a check valve 19 which overcomes the elastic force of the return spring 20, and a position magnet 21 which is used for detecting the moving position of the driving rod 13 by the displacement sensor 5 is arranged on the side surface of the check valve 19. During control, pressure engine oil supplied by an engine oil pump is filtered by a machine and then is introduced into a check valve 19, a proportional solenoid valve 7 controls a hydraulic valve rod 18 to be opened, the pressure engine oil overcomes the resilience force of a return spring 20 through the check valve 19, the hydraulic valve rod 18 is pushed to realize linear movement of a driving rod 13, the linear movement of the driving rod 13 is converted into circumferential movement of a driving arm assembly 15 through the action of a connecting rod mechanism, so that an oil injection rocker arm eccentric shaft 1 and the driving arm assembly rotate synchronously, a displacement sensor 5 determines the moving position of the driving rod 13 through detecting the position of a position magnet 21 and feeds the moving position back to an ECU (electronic control unit) of an engine, and the displacement sensor and the proportional solenoid valve 7 are linked to realize accurate control of oil injection timing of a pump nozzle 4.
The opening and closing of the proportional solenoid valve 7 and the operation of the fuel control solenoid valve are controlled by an electronic control unit (i.e., ECU) of the engine. The ECU carries out optimal fuel injection control according to the engine speed and the crank angle detected by a speed sensor arranged at the relevant part of an engine flywheel shell and a camshaft chamber 17, signals of an accelerator sensor and other sensor signals, closes and opens a hydraulic valve by controlling the attraction and release of a proportional electromagnet 7 to a hydraulic valve rod 18, and realizes the optimal oil injection time and oil supply time of a pump nozzle 4 by controlling the effective current of an electromagnetic coil of an electromagnetic valve through fuel control.
In actual use, the oil supply device is controlled by an Electronic Control Unit (ECU), the operating conditions of a vehicle and an engine and the operation intention of a driver are collected by a sensor, the ECU can accurately control the oil injection timing and the oil injection quantity under all operating conditions according to signals input by the sensor, a bare engine can reach the Euro III emission standard, after an aftertreatment system is added, the emission can even reach the Euro IV emission standard, and the environmental protection performance is greatly improved. The pump nozzle 4 is directly driven by a cam, oil is supplied only during oil injection, the driving torque is low, the power consumption is low, and the oil supply device has lower cost and higher cost performance than an electric control monoblock pump; the power coverage is wide, and the power generation system is suitable for diesel engines and generator sets for light-duty vehicles, heavy-duty vehicles, locomotives and ships.
The invention drives the accelerator control rod 10 to move longitudinally through the fuel control solenoid valve, further drives the rack 12 on the pump nozzle 4 to move, realizes the control of the fuel injection quantity of the pump nozzle 4, the fuel injection timing mechanism is connected with the fuel injection rocker eccentric shaft 1 through the connecting rod mechanism, converts the axial movement of the driving rod 13 into the circumferential rotation of the fuel injection rocker eccentric shaft 1, utilizes the control of the proportional solenoid valve 7, realizes that the fuel injection timing device pushes the driving rod 13 to be fixed at any position in a specified range, finally controls the effective eccentricity of the fuel injection rocker 3, and achieves the whole-process regulation and control of the fuel injection advance angle.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (5)
1. The utility model provides a diesel engine pump nozzle oil supply unit, includes camshaft room (17), installs oil spout camshaft (2) in camshaft room (17), installs at camshaft room (17) lateral surface and sprays fuel pump nozzle (4), is equipped with between oil spout camshaft (2) and pump nozzle (4) and realizes oil spout rocking arm (3), characterized by of pump nozzle (4) oil spout: the fuel control electromagnetic valve and the fuel injection timing mechanism are installed on the outer side face of the camshaft chamber (17), an oil quantity control rod (10) and a fuel injection rocker arm eccentric shaft (1) which are parallel to the fuel injection camshaft (2) are arranged in the camshaft chamber (17), the fuel control electromagnetic valve drives the oil quantity control rod (10) to move longitudinally to push a rack (12) on a pump nozzle (4) to move so as to control the fuel injection quantity of the pump nozzle (4), the fuel injection timing mechanism is provided with a timing driver (6), a displacement sensor (5) and a proportional electromagnetic valve (7), the fuel injection timing mechanism is connected with the fuel injection rocker arm eccentric shaft (1) through a connecting rod mechanism with a driving rod (13), the timing driver (6) pushes the driving rod (13) to move so as to achieve rotation of the fuel injection rocker arm eccentric shaft (1), and the displacement sensor (5) detects the movement position of the driving rod (13) and feeds back to an ECU of an engine and is linked with the proportional electromagnetic valve (7) so as to achieve accurate control of fuel injection timing of the pump nozzle (4).
2. The diesel engine pump nozzle fuel supply apparatus as set forth in claim 1, wherein: the fuel control solenoid valve have position sensor (8) and electronic actuator (9), oil mass control pole (10) have oil mass control shift fork (16) and impel shift fork (11), electronic actuator (9) promote oil mass control shift fork (16) to remove and realize the removal of oil mass control pole (10), impel shift fork (11) drive rack (12) removal along with oil mass control pole (10) removal, position sensor (8) on be connected with the displacement volume that is used for detecting electronic actuator (9) and with displacement volume feedback to ECU follower rod (22).
3. The diesel engine pump nozzle fuel supply apparatus as set forth in claim 1, wherein: the connecting rod mechanism comprises a driving rod (13) connected with the timing driver (6), a driving arm assembly (15) and a connecting rod (14) of which two ends are respectively connected with the driving rod (13) and the driving arm assembly (15), and the driving arm assembly (15) is fixedly connected with the oil injection rocker arm eccentric shaft (1).
4. A diesel engine pump nozzle fuel supply apparatus as set forth in claim 3, characterized in that: the timing driver (6) is provided with a hydraulic valve rod (18) which is connected with the driving rod (13) and is controlled to be opened and closed by the proportional electromagnetic valve (7), a return spring (20) which is sleeved on the driving rod (13), and a check valve (19) which provides engine oil pressure through an engine oil pump and overcomes the elastic force of the return spring (20), wherein a position magnet (21) used for detecting the moving position of the driving rod (13) by a displacement sensor (5) is arranged on the side surface of the check valve (19).
5. The diesel engine pump nozzle fuel supply apparatus as set forth in claim 1, wherein: the oil injection rocker arm (3) is installed on the oil injection rocker arm eccentric shaft (1), the installation axis of the oil injection rocker arm (3) and the installation axis of the camshaft chamber (17) have an eccentricity e, one end of the oil injection rocker arm (3) is in contact with the oil injection camshaft (2), and the other end of the oil injection rocker arm (3) is pressed on a spring seat located at the upper end of the pump nozzle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611102205.6A CN106555678B (en) | 2016-12-02 | 2016-12-02 | Oil supply device for pump nozzle of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611102205.6A CN106555678B (en) | 2016-12-02 | 2016-12-02 | Oil supply device for pump nozzle of diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106555678A CN106555678A (en) | 2017-04-05 |
| CN106555678B true CN106555678B (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611102205.6A Active CN106555678B (en) | 2016-12-02 | 2016-12-02 | Oil supply device for pump nozzle of diesel engine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555604B (en) * | 2018-11-30 | 2023-10-13 | 潍坊力创电子科技有限公司 | Engine oil supply advance angle electric control adjusting device |
| CN109630282B (en) * | 2018-11-30 | 2023-08-15 | 潍坊力创电子科技有限公司 | Engine oil supply advance angle electric control adjusting device |
| CN109882331B (en) * | 2019-02-28 | 2020-11-13 | 一汽解放汽车有限公司 | Long needle valve fuel sprayer mating parts high pressure flow measuring device |
| CN114992023B (en) * | 2022-06-09 | 2023-09-26 | 北京航空航天大学 | Aeroengine fuel injection control method suitable for negative carbon biofuel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907559A (en) * | 1988-04-08 | 1990-03-13 | Voest-Alpine Automotive Gesellschaft M.B.H. | Pump nozzle for diesel engines |
| JPH08284781A (en) * | 1995-04-18 | 1996-10-29 | Mitsubishi Motors Corp | Controller for fuel injection pump |
| CN2440949Y (en) * | 2000-09-08 | 2001-08-01 | 无锡威孚集团有限公司 | Oil jetting pump |
| JP2012077725A (en) * | 2010-10-05 | 2012-04-19 | Yanmar Co Ltd | Device for adjusting fuel injection timing of diesel engine, and method of adjusting assembly phase of the same |
| KR20120126806A (en) * | 2011-05-13 | 2012-11-21 | 현대중공업 주식회사 | Hybrid fuel injection equipment for diesel engine |
| CN103321769A (en) * | 2013-07-10 | 2013-09-25 | 无锡开普动力有限公司 | Fuel injection system of electronic control unit pump |
-
2016
- 2016-12-02 CN CN201611102205.6A patent/CN106555678B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907559A (en) * | 1988-04-08 | 1990-03-13 | Voest-Alpine Automotive Gesellschaft M.B.H. | Pump nozzle for diesel engines |
| JPH08284781A (en) * | 1995-04-18 | 1996-10-29 | Mitsubishi Motors Corp | Controller for fuel injection pump |
| CN2440949Y (en) * | 2000-09-08 | 2001-08-01 | 无锡威孚集团有限公司 | Oil jetting pump |
| JP2012077725A (en) * | 2010-10-05 | 2012-04-19 | Yanmar Co Ltd | Device for adjusting fuel injection timing of diesel engine, and method of adjusting assembly phase of the same |
| KR20120126806A (en) * | 2011-05-13 | 2012-11-21 | 현대중공업 주식회사 | Hybrid fuel injection equipment for diesel engine |
| CN103321769A (en) * | 2013-07-10 | 2013-09-25 | 无锡开普动力有限公司 | Fuel injection system of electronic control unit pump |
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| Publication number | Publication date |
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| CN106555678A (en) | 2017-04-05 |
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