CN203551284U - Fault cylinder detection block assembly of high pressure common rail diesel engine - Google Patents
Fault cylinder detection block assembly of high pressure common rail diesel engine Download PDFInfo
- Publication number
- CN203551284U CN203551284U CN201320747660.7U CN201320747660U CN203551284U CN 203551284 U CN203551284 U CN 203551284U CN 201320747660 U CN201320747660 U CN 201320747660U CN 203551284 U CN203551284 U CN 203551284U
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- China
- Prior art keywords
- high pressure
- common rail
- pressure common
- nut
- shank
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Abstract
The utility model discloses a fault cylinder detection block assembly of a high pressure common rail diesel engine. The assembly comprises a block and a nut. The block is provided with a bottom part, a middle part and a handle part. The bottom part is matched with the transition bottom part of an oil outlet joint of a high pressure common rail pipe. The middle part is matched with a communicating hole of the oil outlet joint. The diameter of the handle part is less than the diameter of the middle part. A coaxial threaded hole and unthreaded hole are orderly arranged in the nut. The threaded hole is connected with the outer thread of the oil outlet joint. The aperture of the unthreaded hole is larger than the diameter of the handle part. After installation, the nut is arranged on the handle part, and the end part of the handle part is exposed outside the nut. The plug assembly has the advantages of simple structure and convenient installation, can quickly determine a fault point of a high pressure common rail system, and can be quickly arranged on the oil outlet joint of the high pressure common rail pipe under the condition of inconvenient repair to ensure continuous running of an automobile.
Description
Technical field
The utility model relates to engine art, and particularly a kind of disconnected cylinder of Design of High Pressure Common Rail Diesel Engine detects plug assembly.
Background technology
The fault more common by the method for disconnected cylinder method detection of engine faults, this method can Diagnosis on Engine mechanical motion part, can diagnose again the fault of oil pump in fuel system, fuel injector.For traditional mechanical type oil pump, often unclamp high-pressure oil pipe break cylinder detect.
Along with scientific and technological development, four Valves Technology and electronic control system are widely applied in diesel engine field, different from traditional mechanical type diesel engine, common rail diesel engine adopts electronic control fuel system, and fuel injector and pilot thereof are all contained in cylinder head cover.When cylinder that four valve Design of High Pressure Common Rail Diesel Engines are broken detects, can disconnect the pilot of fuel injector, need to take apart cylinder head cover, workload is larger; Also can use the diagnostic equipment cylinder that breaks to detect, but the use of diagnostic equipment has limitation, when diesel engine breaks down cannot set up rail pressure time, be difficult to distinguish the fuel injector of certain cylinder or oil pump or common rail pipe pressure regulator valve and occurred fault.
Utility model content
The utility model is in order to overcome defect in above-mentioned prior art, and by a kind of obstruction of using when the fault is provided, the cylinder that breaks quickly and easily detects.
For achieving the above object, the utility model provides a kind of disconnected cylinder of Design of High Pressure Common Rail Diesel Engine to detect plug assembly, comprise: stop up, it is provided with bottom, middle part and shank, bottom is adaptive with the transition bottom of the delivery connection of high-pressure common-rail pipe, the intercommunicating pore adaptation of middle part and delivery connection, the diameter of shank is less than the diameter at middle part; Nut, is provided with coaxial threaded hole and unthreaded hole successively in it, threaded hole is connected with the external thread of delivery connection, and the aperture of unthreaded hole is greater than the diameter of shank, and after installation, nut is installed on shank, and the end of shank is exposed to the outside of nut.Plug assembly simple in structure, easy for installation, can determine fast the trouble spot of high pressure co-rail system, and in the situation that being inconvenient to keep in repair, can be quick installed on the delivery connection of high-pressure common-rail pipe, ensure automobile continue travel.
In technique scheme, also comprise snap ring, on shank, near free end, be provided with the draw-in groove coaxial with shank, snap ring is arranged in draw-in groove.The installation that snap ring can be plug assembly provides further guarantee, and when not using, by snap ring, obstruction and nut is linked together, and can prevent the Loss that the two separation causes, to reuse.
In technique scheme, the bottom of obstruction is to cut the taper on top or spherical.Taper or spherical obstruction bottom can provide sealing for oil circuit.
In technique scheme, the middle part of obstruction is cylindric.The columned intercommunicating pore adaptation of stopping up middle part and delivery connection, coordinates with the step forming between threaded hole in nut and unthreaded hole the sealing that forms oil circuit.
Accompanying drawing explanation
Fig. 1 is the sectional view of an embodiment of prior art mesohigh common rail pipe;
Fig. 2 is the stereographic map of plug assembly of the present utility model;
Fig. 3 is the sectional view of obstruction of the present utility model;
Fig. 4 is the sectional view of nut of the present utility model.
Mark the following drawings mark thereon by reference to the accompanying drawings:
1-delivery connection, 11-transition bottom, 12-intercommunicating pore, 2-stops up, 21-bottom, 22-middle part, 23-shank, 24-draw-in groove, 3-nut, 31-threaded hole, 32-unthreaded hole, 4-snap ring.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subject to the restriction of embodiment.
As shown in Figure 1, in the delivery connection 1 of the high-pressure common-rail pipe of prior art, be provided with intercommunicating pore 12, be provided with transition bottom 11 in intercommunicating pore 12 and common rail pipe junction, transition bottom 11 is for cutting the taper on top or spherical.Delivery connection 1 is provided with external thread.
As shown in Figure 2, plug assembly of the present utility model comprises obstruction 2, nut 3 and snap ring 4.As shown in Figure 3, stop up 2 and be provided with bottom 21, middle part 22 and shank 23, transition bottom 11 adaptations of bottom 21 and delivery connection 1.Middle part 22 is cylindric, with intercommunicating pore 12 adaptations of delivery connection 1.The diameter of shank 23 is less than the diameter at middle part 22, and near free end, is provided with the draw-in groove 24 coaxial with shank 23 on shank 23.Snap ring 4 is connected in draw-in groove 24.
As shown in Figure 4, in nut 3, be provided with successively coaxial threaded hole 31 and unthreaded hole 32.The internal thread of threaded hole 31 is connected with the external thread of delivery connection 1, and the aperture of unthreaded hole 32 is slightly larger than the diameter of the shank 23 that stops up 2, and shank 23 can be passed from unthreaded hole 32.
When plug assembly is installed, first obstruction 2 is placed in delivery connection 1, shank 23 protrudes from the end of delivery connection, then nut 3 is installed on the shank 23 that stops up 2, and the internal thread of nut 3 is connected with the external thread of delivery connection, draw-in groove 24 is exposed to the outside of nut 3.Preferably, after nut 3 is arranged on delivery connection, snap ring 4 is arranged in draw-in groove 24, for the installation of plug assembly provides better connection.
By plug assembly after delivery connection dismounting, nut 3 is installed on the shank 23 that stops up 2, and snap ring 4 is arranged in draw-in groove 24, in case nut is lost after separation with obstruction, be convenient to again utilize.
When rail pressure cannot be set up, after engine shutdown, plug assembly is arranged on single or multiple delivery connections, to stop fuel oil to arrive fuel injector, then starting engine, observes the variation that plug assembly front and back are installed, failure judgement reason.
When there is certain cylinder injector pressure release fault but being inconvenient to keep in repair in diesel engine, plug assembly is installed on corresponding common rail pipe delivery connection, Rapid Establishment rail pressure, so that automobile continues to travel.
Plug assembly simple in structure, easy for installation, can determine fast the trouble spot of high pressure co-rail system, and in the situation that being inconvenient to keep in repair, can be quick installed on the delivery connection of high-pressure common-rail pipe, ensure automobile continue travel.
Disclosed is above only several specific embodiment of the present utility model, and still, the utility model is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (4)
1. the disconnected cylinder of Design of High Pressure Common Rail Diesel Engine detects a plug assembly, it is characterized in that, comprising:
Stop up, it is provided with bottom, middle part and shank, and the transition bottom of the delivery connection of described bottom and high-pressure common-rail pipe is adaptive, the intercommunicating pore adaptation of described middle part and described delivery connection, and the diameter of described shank is less than the diameter at described middle part;
Nut, is provided with coaxial threaded hole and unthreaded hole successively in it, described threaded hole is connected with the external thread of described delivery connection, the aperture of described unthreaded hole is greater than the diameter of described shank, after installation, described nut is installed on described shank, and the end of described shank is exposed to the outside of described nut.
2. the disconnected cylinder of Design of High Pressure Common Rail Diesel Engine according to claim 1 detects plug assembly, it is characterized in that, also comprises snap ring, on described shank, near free end, is provided with the draw-in groove coaxial with described shank, and described snap ring is arranged in described draw-in groove.
3. the disconnected cylinder of Design of High Pressure Common Rail Diesel Engine according to claim 1 and 2 detects plug assembly, it is characterized in that, the described bottom of described obstruction is to cut the taper on top or spherical.
4. the disconnected cylinder of Design of High Pressure Common Rail Diesel Engine according to claim 1 and 2 detects plug assembly, it is characterized in that, the described middle part of described obstruction is cylindric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320747660.7U CN203551284U (en) | 2013-11-25 | 2013-11-25 | Fault cylinder detection block assembly of high pressure common rail diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320747660.7U CN203551284U (en) | 2013-11-25 | 2013-11-25 | Fault cylinder detection block assembly of high pressure common rail diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551284U true CN203551284U (en) | 2014-04-16 |
Family
ID=50469382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320747660.7U Expired - Fee Related CN203551284U (en) | 2013-11-25 | 2013-11-25 | Fault cylinder detection block assembly of high pressure common rail diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551284U (en) |
-
2013
- 2013-11-25 CN CN201320747660.7U patent/CN203551284U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20211125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |