1. The utility model provides a two jar diesel engine high pressure common rail fuel injection system which includes box (30), hydraulic system (10) and electrical system (20), its characterized in that: hydraulic system (10) include a common rail pump (14) electrical system (20) include a plurality of sensors (22), are used for right hydraulic system (10) monitor, be provided with a plurality of transition pieces on box (30), the transition piece includes bent axle rotational speed transition piece (31), cam rotational speed transition piece (32), common rail pump transition piece (33), the transition piece all is fixed to be set up on box (30), bent axle rotational speed transition piece (31), cam rotational speed transition piece (32) are used for right sensor (22) are fixed, common rail pump transition piece (33) are used for right common rail pump (14) are fixed.

2. The two-cylinder diesel engine high pressure common rail fuel injection system of claim 1, characterized in that: the hydraulic system (10) comprises a common rail pump (14), a driving device is arranged on the common rail pump (14) and used for driving the common rail pump (14) to run, the driving device comprises a flywheel (141) and a camshaft (142), the flywheel (141) is arranged in a disc shape, a rotating speed fluted disc (1411) is arranged on the flywheel (141), special teeth are arranged on the rotating speed fluted disc (1411), the sensor (22) comprises a crankshaft sensor (223), and the crankshaft sensor (223) is fixed on a crankshaft rotating speed transition block (31) and used for measuring the rotating speed of the flywheel (141).

3. The two-cylinder diesel engine high pressure common rail fuel injection system of claim 2, characterized in that: the rotating speed fluted disc (1411) is assembled and fixed on the flywheel (141).

4. The two-cylinder diesel engine high pressure common rail fuel injection system of claim 2, characterized in that: the common rail pump is characterized in that a peach-shaped part (1421) and a signal tooth (1422) are arranged on the cam shaft (142), the peach-shaped part (1421) is used for driving the common rail pump (14) to operate, the signal tooth (1422) is used for providing a rotating speed signal of the cam shaft (142), the sensor (22) comprises a cam rotating speed sensor (222), and the cam rotating speed sensor (222) is fixed on the cam rotating speed transition block (32) and is arranged corresponding to the signal tooth (1422).

5. The two-cylinder diesel high pressure common rail fuel injection system of claim 4, wherein: a common rail pipe (15) is connected to one side of the common rail pump (14), the sensor (22) comprises a rail pressure sensor (221), and the rail pressure sensor (221) is fixedly arranged on the common rail pipe (15).

6. The two-cylinder diesel engine high pressure common rail fuel injection system of claim 1, characterized in that: the cooling device is characterized in that an oil duct (34) and a nozzle mounting hole (35) are formed in the box body (30), the nozzle mounting hole (35) and the oil duct (34) are communicated with each other, and a cooling nozzle (351) is mounted at the opening of the nozzle mounting hole (35).

Background

The electronic control high-pressure common rail oil supply injection system can improve the fuel economy of the diesel engine, can provide the optimal oil supply quantity and the optimal oil supply timing, and the electronic control system can correct the altitude, the external environment temperature and the like, so that the power is relatively improved, and the torque, especially the low-speed torque is increased; the electric control system has the characteristics of flexible control of oil injection parameters, high response speed and the like, and is an effective technical scheme for solving the problem of increasingly troublesome emission.

The traditional two-cylinder diesel engine oil supply system adopts a mechanical fuel injection system, and in the process of upgrading the system into an electric control high-pressure common rail fuel system, an oil injection pump driving gear needs to be added, a camshaft sensor, a rotating speed signal sensor and the like are added, the main parts of an engine cylinder body, a cylinder cover and the like are greatly changed, the cylinder and the cylinder cover are redesigned, and the mold is opened again to manufacture the cylinder body and the cylinder cover, so that the diesel engine development period and the whole engine cost are greatly increased.

Disclosure of Invention

The invention aims to solve the technical problems of high development period and high overall cost in the upgrading of an electronic control high-pressure common rail fuel system in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a two jar diesel engine high pressure common rail fuel injection system, its includes box, hydraulic system and electrical system, hydraulic system includes a common rail pump electrical system includes a plurality of sensors, is used for rightly hydraulic system monitors, be provided with a plurality of transition pieces on the box, the transition piece includes bent axle rotational speed transition piece, cam rotational speed transition piece, common rail pump transition piece, the transition piece is all fixed to be set up on the box, bent axle rotational speed transition piece, cam rotational speed transition piece are used for right the sensor is fixed, common rail pump transition piece is used for right common rail pump fixes.

Preferably, the hydraulic system includes a common rail pump, be provided with drive arrangement on the common rail pump, drive arrangement is used for the drive the operation of common rail pump, drive arrangement includes flywheel and camshaft, the flywheel is the disc setting, be provided with the rotational speed fluted disc on the flywheel, be provided with special tooth on the rotational speed fluted disc, the sensor includes the crankshaft sensor, the crankshaft sensor is fixed on the crankshaft rotational speed transition piece, it is right to be used for flywheel rotational speed surveys.

Preferably, the rotating speed fluted disc thermal sleeve is assembled and fixed on the flywheel.

Preferably, the cam shaft is provided with a peach-shaped part and signal teeth, the peach-shaped part is used for driving the common rail pump to operate, the signal teeth are used for providing a rotating speed signal of the cam shaft, the sensor comprises a cam rotating speed sensor, and the cam rotating speed sensor is fixed on the cam rotating speed transition block and is arranged corresponding to the signal teeth.

Preferably, a common rail pipe is connected to one side of the common rail pump, the sensor includes a rail pressure sensor, and the rail pressure sensor is fixedly arranged on the common rail pipe.

Preferably, the box body is provided with an oil duct and a nozzle mounting hole, the nozzle mounting hole is communicated with the oil duct, and a cooling nozzle is mounted at the opening of the nozzle mounting hole.

The application provides a two jar diesel engine high pressure common rail fuel injection system, its setting through the transition piece, when upgrading mechanical type oil injection system to automatically controlled high pressure common rail system, need not to modify the mould of castings such as box, flywheel, cylinder cap, and the spare part of change is few, has practiced thrift the cost to make easily manufacturing, whole spare parts all can share with former mechanical pump formula diesel engine.

Drawings

Fig. 1 and 2 are schematic diagrams of oil circuits and circuit structures of a high-pressure common rail fuel injection system of a two-cylinder diesel engine according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a common rail pump of a high-pressure common rail fuel injection system of a two-cylinder diesel engine according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a partial tank structure of a high-pressure common rail fuel injection system of a two-cylinder diesel engine according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a camshaft of a high-pressure common rail fuel injection system of a two-cylinder diesel engine according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a tank of a high-pressure common rail fuel injection system of a two-cylinder diesel engine according to an embodiment of the invention.

Illustration of the drawings: 10. a hydraulic system; 11. an oil tank; 12. an oil transfer pump; 13. a filter; 14. a common rail pump; 141. a flywheel; 1411. a rotating speed fluted disc; 142. a camshaft; 1421. peach shape; 1422. signal teeth; 15. a common rail pipe; 16. an oil injector; 17. an oil path; 20. an electronic control system; 21. an electronic control unit; 22. a sensor; 221. a rail pressure sensor; 222. a cam rotation speed sensor; 223. a crankshaft speed sensor; 23. a storage battery; 30. a box body; 31. A crankshaft rotational speed transition block; 32. a cam rotation speed transition block; 33. a common rail pump transition block; 34. an oil passage; 35. a nozzle mounting hole; 351. the nozzle is cooled.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

Referring to fig. 1-6, a high-pressure common rail fuel injection system for a two-cylinder diesel engine includes an electronic control system 20, a hydraulic system 10, and a tank 30, where the electronic control system 20 is configured to detect an actual operating state of the engine and accurately control fuel injection of the engine, and both the electronic control system 20 and the hydraulic system 10 are disposed in the tank 30.

Referring to fig. 1 and fig. 2, in an embodiment, the hydraulic system 10 includes an oil tank 11, an oil delivery pump 12, a filter 13, a common rail pump 14, a common rail 15, a plurality of oil injectors 16, and a plurality of oil paths 17, where the oil paths 17 are used to connect the oil tank 11, the oil delivery pump 12, the filter 13, and the common rail pump 14 is connected to the oil injectors 16 through the common rail 15. When the diesel oil fuel delivery device is used, fuel oil is stored in the oil tank 11, sucked out through the fuel delivery pump 12, sent into the common rail pump 14 after passing through the filter 13, then transmitted into the common rail pipe 15 through the common rail pump 14, and distributed into the fuel injectors 16 through the common rail pipe 15, and fuel oil delivery is completed.

In an embodiment, referring to fig. 3 and 4, a driving device is disposed on the common rail pump 14, and the driving device is configured to drive the common rail pump 14 to operate, in an embodiment, the driving device includes a flywheel 141 and a camshaft 142, the flywheel 141 is disposed in a disc shape, a speed gear 1411 is disposed on the flywheel 141, a special gear is disposed on the speed gear 1411, the speed gear 1411 is configured to provide a speed signal for a speed of the flywheel 141, the camshaft 142 is disposed in a cylindrical shape, in an embodiment, referring to fig. 5, a peach-shaped gear 1421 and a signal gear 1422 are disposed on the camshaft 142, the peach-shaped gear 1421 is configured to drive the common rail pump 14 to operate, and the signal gear 1422 is configured to provide a speed of the camshaft 142.

Referring to fig. 1-3, in one embodiment, the electronic control system 20 includes an electronic control unit 21 and a plurality of sensors 22, the electronic control unit 21 is connected to a battery 23, the electronic control unit 21 is electrically connected to the sensors 22, the sensors 22 include a rail pressure sensor 221, a cam rotation speed sensor 222 and a crankshaft rotation speed sensor 223, the rail pressure sensor 221 is used for detecting a hydraulic pressure in the common rail pipe 15, and in one embodiment, the rail pressure sensor 221 is disposed on the common rail pipe 15; the cam rotation speed sensor 222 is used for detecting the rotation speed of the cam shaft 142, and in an embodiment, the cam rotation speed sensor 222 is disposed corresponding to the signal teeth 1422 and fixed on the housing 30; the crankshaft rotation speed sensor 223 is configured to detect a rotation speed of the flywheel 141, in an embodiment, the crankshaft rotation speed sensor 223 is disposed corresponding to the rotation speed fluted disc 1411, and in an application process, a rail pressure signal, a camshaft rotation speed signal, and a rotation speed signal of the flywheel are transmitted to the electronic control unit 21 through the sensor 22, and each component of the hydraulic system 10 is regulated and controlled through the electronic control unit 21, so that an accurate control of an oil pressure of the common rail pipe 15 is achieved, and an oil injection amount, an oil injection time, an oil injection rate, and the like of the oil injector 16 are controlled. In other embodiments, the sensor 22 may also include other sensors such as a temperature sensor, a pressure sensor, etc., and the sensor 22 is used to detect parameters within the hydraulic system 10.

Referring to fig. 4, a common rail pump transition block 33 is embedded in the tank 30, the common rail pump transition block 33 is welded and fixed to the tank 30, the common rail pump transition block 33 includes a fixed pipeline, the fixed pipeline is used for fixing the common rail pump 14, a crankshaft rotation speed transition block 31 and a cam rotation speed transition block 32 are further disposed on the tank 30, the crankshaft rotation speed transition block 31 and the cam rotation speed transition block 32 are fixed to the tank 30, in an embodiment, the crankshaft rotation speed transition block 31 includes a limiting plate 311 and a fixing plate 312, the limiting plate 311 is fixedly disposed on the tank 30, the fixing plate 312 and the limiting plate 311 are disposed perpendicular to each other, the fixing plate 312 includes a fixing hole 313, and the fixing hole 313 is used for fixing the crankshaft rotation speed sensor 223; thus, when the common rail pump 14, the cam rotation speed sensor 222, and the crank rotation speed sensor 223 are mounted, the die of the case 30 does not need to be changed, and the process is convenient.

Referring to fig. 6, in one embodiment, an oil passage 34 and a nozzle mounting hole 35 are formed in the case 30, the nozzle mounting hole 35 and the oil passage 34 are communicated with each other, and a cooling nozzle 351 is mounted in the nozzle mounting hole 35.

In the application process, the electric control unit 21 detects the actual running state of the engine in time according to various sensors 22, and the electric control unit 21 performs calculation according to a preset program to determine the optimal oil injection quantity, oil injection time, oil injection speed and the like suitable for the working condition, so that the accurate control of oil injection is realized. Easy to realize pre-injection and multiple injection, and can reduce NO of diesel engine_xThe emission of the fuel can ensure excellent dynamic property and economy.

Simultaneously, the application provides a two jar diesel engine high pressure common rail fuel injection system, its setting through transition piece 31, when upgrading mechanical type oil injection system to automatically controlled high pressure common rail system, need not to modify the mould of castings such as box 30, flywheel 141, cylinder cap, and the spare part of change is few, has practiced thrift the cost to make easily manufacturing, all spare parts all can with former mechanical pump formula diesel engine sharing.

It should be noted that various standard components used in the present invention are commercially available, non-standard components are specially customized, and the connection manner adopted in the present invention, such as bolting, welding, etc., is also a very common means in the mechanical field, and the inventor does not need to describe herein any further.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.