CN202811149U - Bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system - Google Patents
Bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system Download PDFInfo
- Publication number
- CN202811149U CN202811149U CN 201220502160 CN201220502160U CN202811149U CN 202811149 U CN202811149 U CN 202811149U CN 201220502160 CN201220502160 CN 201220502160 CN 201220502160 U CN201220502160 U CN 201220502160U CN 202811149 U CN202811149 U CN 202811149U
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- China
- Prior art keywords
- delivery valve
- plunger
- fuel injection
- spring
- bottom clearance
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- Expired - Fee Related
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Abstract
A bottom clearance type multi-cylinder fuel injection pump assembly of a fuel injection system comprises a pump body, a camshaft, a tappet body, a spring lower seat, a plunger spring, a spring upper seat, an oil mass control sleeve combination, a plunger and barrel assembly, a delivery valve gasket, a delivery valve matching part, a delivery valve spring and a delivery valve tight seat. The camshaft is placed in a lower cavity of the pump body. The tappet body, the spring lower seat, the plunger spring, the spring upper seat, the oil mass control sleeve combination, the plunger and barrel assembly, the delivery valve gasket, the delivery valve matching part, the delivery valve spring and the delivery valve tight seat are placed in every cylinder hole of an upper cavity of the pump body from top to bottom. Two wedge-shaped bottom clearance grooves are formed in the top of the plunger and barrel assembly which is tightly and fixedly connected with the pump body through a bolt, and the delivery valve tight seat is connected with the plunger and barrel assembly through a screw thread of the delivery valve tight seat. On the premise of meeting the requirements of not changing the weight and the size of the fuel injection pump, the use requirement of medium power diesel engines is well met by applying a bottom clearance type plunger to optimize design and to replace an advancer.
Description
Technical field
The utility model belongs to field of internal combustion engine, relates to a kind of pump, relates in particular to a kind of bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system.
Background technique
At present, the medium power diesel engine that China's internal combustion engine fuel injection system industry is supporting, mostly adopt common jerk fuel injection pump assembly, some diesel engines require supporting Injection Pump band advancing device, to satisfy non-road two-stage emission standard, the simultaneously satisfied requirement that reduces oil consumption.Mechanical flying hammer device by advancing device can make fuel feeding in advance, with the control of realization beginning of injection, thereby has satisfied the criterion of the fuel consumption.But volume, weight and the fabricating cost of product have also been increased simultaneously.Development along with diesel technology, many Novel diesel engines are compacter for the layout that makes complete machine, more reasonable structure, mostly select to install bottom clearance formula Injection Pump as the oil-fired system parts that match, the Injection Pump of this type has been cancelled heavy advancing device, its plunger is being processed with ring recess or helical groove structure near the head below the end face, and the raising that utilizes the throttle effect of this groove can reach with rotating speed obtains the characteristic requirements that fuel feeding shifts to an earlier date.Bottom clearance type jerk fuel injection pump assembly can replace advancing device to satisfy the emission standard requirement of non-road two-stage of diesel engine.
The model utility content
The purpose of this utility model is to provide the bottom clearance type multi-cylinder fuel injection pump assembly of the constant fuel injection system of a kind of rational in infrastructure, volume and weight.
The utility model can achieve the above object by the following technical solutions: a kind of bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system comprises: the pump housing, camshaft, tappet body, spring lower seat, piston spring, the spring seat of honour, fuel control sleeve component, plunger coupled parts, delivery valve gasket, delivery valve matching parts, oil outlet valve spring, delivery valve holder; Camshaft is packed in the pump housing cavity of resorption in each cylinder hole of pump housing epicoele, pack into successively tappet body, spring lower seat, piston spring, the spring seat of honour, fuel control sleeve component, plunger coupled parts, delivery valve gasket, delivery valve matching parts, oil outlet valve spring, delivery valve holder from bottom to top; Two wedge shape bottom clearance grooves are arranged at the top of plunger coupled parts; Plunger coupled parts adopts bolton to be connected with the pump housing, and delivery valve holder adopts with plunger coupled parts and self is threaded.
Adjacent cylinder core distance is 28 ± 0.1mm, and the camshaft center line is 124.5 ± 0.05mm apart from pump housing top height, and plunger diameter is φ 10 ± 0.03mm, during φ 10.5 ± 0.03mm, two bottom clearance grooves of plunger head size height is 1.9 ± 0.05mm, and the inclination angle is 15 °, and the degree of depth is 0.1 ± 0.01mm;
Adjacent cylinder core distance is 28 ± 0.1mm, and the camshaft center line is 124.5 ± 0.05mm apart from pump housing top height, and plunger diameter is φ 11 ± 0.03mm, during φ 11.5 ± 0.03mm, two bottom clearance grooves of plunger head size height is 1.8 ± 0.05 mm, and the inclination angle is 5 °, and the degree of depth is 0.1 ± 0.01mm.
The utility model can reach following good effect after adopting technique scheme: under the prerequisite that satisfies Injection Pump weight, constancy of volume, adopt bottom clearance type plunger, optimal design replaces advancing device, satisfies better the usage requirement of medium power diesel engine.
Description of drawings:
Fig. 1 is the bottom clearance type multi-cylinder fuel injection pump assembly structural representation of a kind of fuel injection system of the utility model.
Fig. 2 is a kind of bottom clearance type multi-cylinder fuel injection pump assembly bottom clearance type piston structure schematic representation of fuel injection system.
Fig. 3 is the schematic top plan view of bottom clearance type piston structure.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described.As shown in Figure 1, a kind of bottom clearance type multi-cylinder fuel injection pump assembly structure of fuel injection system comprises: the pump housing 1, camshaft 2, tappet body 3, spring lower seat 4, piston spring 5, the spring seat of honour 6, fuel control sleeve component 7, plunger coupled parts 8, delivery valve gasket 9, delivery valve matching parts 10, oil outlet valve spring 11, delivery valve holder 12.Camshaft 2 is packed in the pump housing 1 cavity of resorption, in each cylinder hole of the pump housing 1 epicoele, pack into from bottom to top successively tappet body 3, spring lower seat 4, piston spring 5, the spring seat of honour 6, and use special fixture to be connected fastening with the pump housing 1 the spring seat of honour 6; Then pack into fuel control sleeve component 7, plunger coupled parts 8, and use special fixture that plunger coupled parts 8 lower ends are connected with spring lower seat 4; Then pack into delivery valve gasket 9, delivery valve matching parts 10, oil outlet valve spring 11, delivery valve holder 12; Plunger coupled parts 8 adopts bolton to be connected with the pump housing 1, and delivery valve holder 12 adopts with plunger coupled parts 8 and self is threaded.
Adjacent cylinder core distance A is 28 ± 0.1mm, camshaft 2 center lines are 124.5 ± 0.05mm apart from the pump housing 1 top height C, plunger diameter B is φ 10 ± 0.03mm, during φ 10.5 ± 0.03mm, two bottom clearance grooves of plunger head size height D is 1.9 ± 0.05mm, inclination angle E is 15 °, and degree of depth F is 0.1 ± 0.01mm;
Adjacent cylinder core distance A is 28 ± 0.1mm, camshaft 2 center lines are 124.5 ± 0.05mm apart from the pump housing 1 top height C, plunger diameter B is φ 11 ± 0.03mm, during φ 11.5 ± 0.03mm, two bottom clearance grooves of plunger head size height D is 1.8 ± 0.05 mm, inclination angle E is 5 °, and degree of depth F is 0.1 ± 0.01mm.
The gear train that moves through of crankshaft of diesel engine drives fuel injection camshaft 2 motions, camshaft 2 drives plunger coupled parts 8 and moves reciprocatingly, to realize the pressurization to fuel oil, then by delivery valve matching parts 10 fuel oil is sprayed, through high-pressure oil pipe, injector assembly fuel oil being sprayed into burning chamber of diesel engine burns, by the in advance characteristic of bottom clearance plunger, satisfy diesel engine various performance parameters and emission request simultaneously.
Claims (3)
1. the bottom clearance type multi-cylinder fuel injection pump assembly of a fuel injection system comprises: the pump housing (1), camshaft (2), tappet body (3), spring lower seat (4), piston spring (5), the spring seat of honour (6), fuel control sleeve component (7), plunger coupled parts (8), delivery valve gasket (9), delivery valve matching parts (10), oil outlet valve spring (11), delivery valve holder (12); It is characterized in that: camshaft (2) is packed in the pump housing (1) cavity of resorption in each cylinder hole of the pump housing (1) epicoele, pack into successively tappet body (3), spring lower seat (4), piston spring (5), the spring seat of honour (6), fuel control sleeve component (7), plunger coupled parts (8), delivery valve gasket (9), delivery valve matching parts (10), oil outlet valve spring (11), delivery valve holder (12) from bottom to top; Two wedge shape bottom clearance grooves are arranged at the top of plunger coupled parts (8); Plunger coupled parts (8) adopts bolton to be connected with the pump housing (1), and delivery valve holder (12) adopts with plunger coupled parts (8) and self is threaded.
2. the bottom clearance type multi-cylinder fuel injection pump assembly of a kind of fuel injection system according to claim 1, it is characterized in that: adjacent cylinder core distance (A) is 28 ± 0.1mm, camshaft (2) center line is 124.5 ± 0.05mm apart from the pump housing (1) top height (C), plunger straight (B) is φ 10 ± 0.03mm, during φ 10.5 ± 0.03mm, two bottom clearance grooves of plunger head size height (D) is 1.9 ± 0.05mm, and inclination angle (E) is 15 °, and the degree of depth (F) is 0.1 ± 0.01mm.
3. the bottom clearance type multi-cylinder fuel injection pump assembly of a kind of fuel injection system according to claim 1, it is characterized in that: adjacent cylinder core distance (A) is 28 ± 0.1mm, camshaft (2) center line is 124.5 ± 0.05mm apart from the pump housing (1) top height (C), plunger diameter (B) is φ 11 ± 0.03mm, during φ 11.5 ± 0.03mm, two bottom clearance grooves of plunger head size height (D) is 1.8 ± 0.05 mm, and inclination angle (E) is 5 °, and the degree of depth (F) is 0.1 ± 0.01mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502160 CN202811149U (en) | 2012-09-28 | 2012-09-28 | Bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502160 CN202811149U (en) | 2012-09-28 | 2012-09-28 | Bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202811149U true CN202811149U (en) | 2013-03-20 |
Family
ID=47870035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220502160 Expired - Fee Related CN202811149U (en) | 2012-09-28 | 2012-09-28 | Bottom clearance type multi-cylinder fuel injection pump assembly of fuel injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202811149U (en) |
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2012
- 2012-09-28 CN CN 201220502160 patent/CN202811149U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20200928 |