CN1530534A - Light vehicle straight injection pump of diesel engine - Google Patents
Light vehicle straight injection pump of diesel engine Download PDFInfo
- Publication number
- CN1530534A CN1530534A CNA031078117A CN03107811A CN1530534A CN 1530534 A CN1530534 A CN 1530534A CN A031078117 A CNA031078117 A CN A031078117A CN 03107811 A CN03107811 A CN 03107811A CN 1530534 A CN1530534 A CN 1530534A
- Authority
- CN
- China
- Prior art keywords
- injection pump
- fuel injection
- diesel engine
- plunger
- roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
An in-line oil-spraying pump for the diesel engine of light car features that its plunger sleeve has the integral flange structure, the oil retaining ring for preventing cavitation is directly installed in the oil channel on pump body, and its roller is an integral structure without lining sleeve. Its structural parameters are also disclosed. Its advantages are simple structure, low cost, high pumping pressure up to 100 MPa, high oil supplying rate up to 30 cu.mm/day, and less pollution.
Description
Technical field:
The invention belongs to the in-line fuel injection pump of use for diesel engine, particularly belong to the use for diesel engine in-line fuel injection pump that is applicable to light-duty vehicle.
Technical background:
Since the last century the nineties, countries in the world are more and more paid attention to environmental problem, particularly the diesel engine as power train in vehicle application have been proposed the emission request of increasingly stringent.For example European Union member countries have worked out and have progressively improved Europe of requiring No. 1, No. 2, Europe, No. 3 Abgasgesetzs in Europe and following Europe No. 4 standards that will reach.The standard GB 17691-1999 of China requires to reach the emission limit that is equivalent to No. 2, No. 1, Europe and Europe respectively calendar year 2001 and 2005.
Table 1: type approval test emission limit (GB17691-1999)
| The implementation phase | Implementation date | ??CO ?g/kW.h | ????HC ?g/kW.h | ??NOx ?g/kW.h | ??????PM(g/kW.h) | |
| ≤85?kW | ＞85?kW | |||||
| ????A | ?2001.1.1 | ????4.5 | ????1.1 | ????8.0 | ????0.61 | ????0.36 |
| ????B | ?2005.1.1 | ????4.0 | ????1.1 | ????7.0 | ????0.15 | ????0.15 |
A: be equivalent to No. 1, Europe
B: be equivalent to No. 2, Europe
To be equivalent to No. 2 Abgasgesetzs in Europe or requirements at the higher level in order satisfying, must on diesel engine for automobile, to adopt the high-pressure injection technology, improve the admissible pump pressure of jet pressure and Injection Pump.According to existing theory and practice, require jet pressure to reach 120MPa, admissible pump pressure reaches about 100MPa.But in the existing at home and abroad in-line fuel injection pump that is applicable to the following diesel engine of cylinder bore 105mm, with wherein than product of the future, MW pump as the BQ pump of China Wuxi Oil Pump Nozzle Inst exploitation and German Bosch company is an example, and its main structure parameters and performance index are: cylinder core distance L=25～30mm, plunger diameter d=6～10mm, cam lift H=8,9,10mm, peak injection pressure: 80MPa, admissible pump pressure: 65MPa, maximum fuel supply rate: 26mm
3/ deg, high workload rotating speed: 2400r/min.Because existing various in-line fuel injection pumps, the all proportional within the specific limits each other relation of its main structure parameters, for example: ratio H/L≤37% of ratio d/L≤37% of plunger diameter and cylinder core distance, cam lift and cylinder core distance (1, Chinese patent CN87202952; 2, " oil pump nozzle technology " the 3rd phase in 1989 such as the holy light of developing light high-speed BQ type Injection Pump woods; 3, the MW of Bosch company type Injection Pump technical specification " external oil pump nozzle " the 1st phase in 1985).Therefore, less in the boundary dimension that requires Injection Pump, under the situation that satisfies the Light-duty Vehicle installation requirement, the design of in-line fuel injection pump is subjected to the restriction of the factors such as extrusion stress allowable of structure and material, and its performance index and ability to work are difficult to break through for many years.Therefore, the following diesel engine of 105mm cylinder diameter be can't satisfy with the in-line fuel injection pump of prior art exploitation and No. 2 Abgasgesetzs in Europe and requirements at the higher level are equivalent to.
Developed countries such as America and Europe and Japan are not closely all having the Light-duty Vehicle of new model to put goods on the market with in-line fuel injection pump during the last ten years now.They adopt the automatically controlled pump of distribution type, and pump nozzle system or high pressure co-rail system satisfy light vehicle diesel engine and be equivalent to the above low emission requirement of No. 2 Abgasgesetzs in Europe.These new fuel injection technical products are compared with in-line fuel injection pump, all have complex structure, and the shortcoming that price is expensive does not possess competitive advantage on Chinese market.
Summary of the invention:
The purpose of this invention is to provide a kind of new use for diesel engine low emission in-line fuel injection pump that is applicable to light-duty vehicle.This in-line fuel injection pump has higher admissible pump pressure and ability to work satisfying under the condition of diesel engine to the requirement of Injection Pump profile installation dimension, can make diesel engine satisfy the requirement of No. 2 Abgasgesetzs in Europe.
The technical solution adopted in the present invention is a kind of use for diesel engine in-line fuel injection pump that is applicable to light-duty vehicle of exploitation, and it mainly comprises plunger (1), plunger bushing (2), outlet valve assembly (3), fuel injection pump housing (4), piston spring (5), camshaft (6), tappet body (7), roller (8), roller pin (9), regulating tie bar (10), regulating sleeve (11), ratch lining (12), ratch cover cap (13), oil deflector (14) and bearing compositions such as (15).Its main structure parameters is cylinder core distance L, plunger diameter d, and cam lift H is characterized in that: a, wherein plunger bushing (2) adopts integral (type) flange formula structure, and the oil deflector (14) that anti-cavitation pitting is used is directly installed in the oil duct on the fuel injection pump housing (4); The scope of b, its main structure parameters cylinder core distance L is L=27～30mm, ratio d/L=37～38% of plunger diameter d and cylinder core distance L, ratio H/L=37～40% of cam lift and cylinder core distance.(seeing Fig. 1 and Fig. 2)
The present invention compares the beneficial effect that is had with prior art: because in-line fuel injection pump provided by the present invention has adopted the plunger bushing (2) of integral (type) flange formula structure, and oil deflector (14) is directly installed in the oil duct on the fuel injection pump housing (4), and be different from the plunger bushing (2) that prior art adopts the cradle type structure like that, and the oil deflector (14) that will prevent cavitation pitting is installed on the plunger bushing (2), therefore under the identical condition of cylinder core distance, the present invention can make plunger diameter obviously strengthen than the plunger diameter that prior art adopted.In addition, because the mutual proportionate relationship of main structure parameters of the present invention has broken through the data area of prior art, therefore the Injection Pump of the present invention through the optimal design exploitation has the strength and stiffness that significantly improve than prior art, thereby can bear higher injection pressure.Admissible pump pressure of the present invention reaches 100MPa, improves 50% than prior art; Represent the parameter of ability to work, maximum fuel supply rate reaches 30mm
3/ deg improves 15% than prior art; Injection Pump of the present invention is applicable to the light-duty vehicle diesel engine that cylinder bore 105mm is following, can make the exhaust index of diesel engine stably reach the requirement of No. 2 Abgasgesetzs in Europe.In addition, in-line fuel injection pump of the present invention is compared with high pressure co-rail system with the automatically controlled pump of distribution type of the prior art, pump nozzle system, then has simple in structure, reliable operation, easy to maintenance and can reduce the advantage of diesel engine for automobile cost significantly.
Description of drawings:
Fig. 1 is embodiments of the invention, the sectional elevation of PM type Injection Pump.
Fig. 2 is embodiments of the invention, and vertical outline drawing of PM type Injection Pump wherein has
Several places part section.
Fig. 3 is a kind of prior art that is used to contrast, the sectional elevation of BQ type Injection Pump.
Embodiment:
Describe the structure characteristic and the working condition of the specific embodiment that proposes according to the present invention in detail below in conjunction with accompanying drawing.
Shown in Fig. 1 and Fig. 2 is embodiments of the invention, is applicable to the low emission PM type Injection Pump of light vehicle diesel engine.Plunger coupled parts adopts the two spill port structures of double spiral groove in this Injection Pump, can obviously improve oil return speed, and is very favourable to reducing the HC discharging.Wherein plunger (1) can select 9,9.5,10 for use, four kinds of diameters of 10.5mm.Plunger bushing (2) adopts integral (type) flange formula structure, and the cradle type structure (Fig. 3) that flange (16) that this structure is adopted than BQ type Injection Pump of the prior art and plunger bushing (2) separate has higher strength and stiffness, helps improving admissible pump pressure.The oil deflector (14) that is used for anti-cavitation pitting in the PM type Injection Pump is directly installed in the oil duct on the oil jet pump body (4), and the oil deflector (14) in BQ type Injection Pump is installed on the flange (16).This improvement can further increase the race diameter of plunger bushing, thereby makes the diameter of plunger further to strengthen.
The important technological parameters of table 2:PM type Injection Pump
| Cylinder core distance L (mm) | 28 |
| Cam lift H (mm) | 10、11 |
| Plunger diameter d (mm) | 9、9.5、10、10.5 |
| Roller widths B (mm) | 13.5 |
The proportionate relationship of main structure parameters is in the PM type Injection Pump: the ratio d/L=37.5% of maximum plunger diameter d and cylinder core distance L; The ratio H/L=39.3% of maximum cam lift H and cylinder core distance L.And typical products BQ type Injection Pump of the prior art, its d/L=36%, H/L=36%.The roller (8) of PM type Injection Pump adopted as shown in Figure 1 not with the overall structure of roller bush, and roller widths is increased to 13.5mm, the ratio B/L of roller widths B and cylinder core distance L reached more than 48.2%.And the roller structure of BQ type Injection Pump as shown in Figure 3, is the structure that has roller bush common in the prior art, and roller widths is 9mm, and B/L equals 36%.After adopting the said structure corrective measure, increase the contact width of cam and roller (8) and the diameter of roller pin (9), helped improving admissible pump pressure.Make the admissible pump pressure of PM type Injection Pump reach 100MPa, improve more than 50% than BQ type Injection Pump.In addition, the end face of pull bar cover cap (13) is concordant with the end face of fuel injection pump housing (4) after assembling in PM type Injection Pump.Can in bracket type installation and end face flange-type installation dual mode, select for use arbitrarily when therefore PM type Injection Pump is installed on diesel engine, all without any difficulty.But in the Injection Pump of prior art, many Injection Pumps are under the bigger situation of regulating tie bar (10) stroke, and pull bar cover cap (13) often protrudes the front-end face of fuel injection pump housing (4), and certain difficulty is arranged when causing oil spout pumps flange to be installed on the diesel engine.
In sum, exemplary embodiments of the present invention, PM type Injection Pump makes the groundwork ability of this in-line fuel injection pump and performance index than prior art significant raising arranged owing in the design of the structure of major part and multiple structural parameter prior art has been carried out important improvement and reinforcement.Behind the diesel engine with the equipped multiple model of PM type Injection Pump, power performance through the evidence diesel engine adheres to specification, exhaust index stably reaches the requirement of Europe 2 Abgasgesetzs, also have simultaneously reliable operation, easy to maintenance, advantage such as reduce cost, really be a kind of light-duty vehicle diesel engine that is applicable to, novel low emission in-line fuel injection pump.
Claims (4)
1, a kind of use for diesel engine in-line fuel injection pump that is applicable to light-duty vehicle, it mainly comprises plunger (1), plunger bushing (2), outlet valve assembly (3), fuel injection pump housing (4), piston spring (5), camshaft (6), tappet body (7), roller (8), roller pin (9), regulating tie bar (10), regulating sleeve (11), pull bar lining (12), pull bar cover cap (13), oil deflector (14) and bearing compositions such as (15); Its main structure parameters is cylinder core distance L, plunger diameter d, and cam lift H is characterized in that:
A, wherein plunger bushing (2) adopts integral (type) flange formula structure, and the oil deflector (14) that anti-cavitation pitting is used is directly installed in the oil duct on the fuel injection pump housing (4);
The scope of b, its main structure parameters cylinder core distance L is L=27～30mm, ratio d/L=37%～38% of plunger diameter d and cylinder core distance L, ratio H/L=37%～40% of cam lift and cylinder core distance.
2, the use for diesel engine in-line fuel injection pump that is applicable to light-duty vehicle according to claim 1 is characterized in that wherein roller (8) has adopted not the overall structure with roller bush, and the ratio B/L of roller widths B and cylinder core distance L is reached more than 48.2%.
3, the use for diesel engine in-line fuel injection pump that is applicable to light-duty vehicle according to claim 1 is characterized in that wherein plunger (1) and plunger bushing (2) have adopted the two spill port structures of double spiral groove.
4, the use for diesel engine in-line fuel injection pump that is applicable to light-duty vehicle according to claim 1 is characterized in that the end face of pull bar cover cap (13) wherein is concordant with the end face of fuel injection pump housing (4) after assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031078117A CN100538060C (en) | 2003-03-17 | 2003-03-17 | The light vehicle diesel engine in-line fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031078117A CN100538060C (en) | 2003-03-17 | 2003-03-17 | The light vehicle diesel engine in-line fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1530534A true CN1530534A (en) | 2004-09-22 |
| CN100538060C CN100538060C (en) | 2009-09-09 |
Family
ID=34283024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031078117A Expired - Fee Related CN100538060C (en) | 2003-03-17 | 2003-03-17 | The light vehicle diesel engine in-line fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100538060C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988496B (en) * | 2009-07-29 | 2013-01-09 | 博世汽车柴油系统股份有限公司 | Vane pump for fuel injection pump device and fuel injection pump device |
| CN112523909A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Isobaric injection pump of high-speed machine |
-
2003
- 2003-03-17 CN CNB031078117A patent/CN100538060C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988496B (en) * | 2009-07-29 | 2013-01-09 | 博世汽车柴油系统股份有限公司 | Vane pump for fuel injection pump device and fuel injection pump device |
| CN112523909A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Isobaric injection pump of high-speed machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100538060C (en) | 2009-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103089507B (en) | Double-row six-cylinder radial type common-rail oil feed pump | |
| CN202578989U (en) | Combined electric control high-pressure common-rail diesel oil injection device | |
| EP1733145B1 (en) | High-pressure pump piston/cylinder unit | |
| CN2610108Y (en) | In-line injection pump of diesel engine of light vehicle | |
| CN100538060C (en) | The light vehicle diesel engine in-line fuel injection pump | |
| CN201292902Y (en) | Isobaric injection pump for strengthened diesel engine | |
| CN201810439U (en) | Isopiestic pressure oil injection pump | |
| WO2010012525A1 (en) | Fuel feeding device for an internal combustion engine | |
| CN201696194U (en) | Tappet body type oil channel structure | |
| CN201635815U (en) | Cooling nozzle of engine piston | |
| CN201810438U (en) | Constant-pressure oil injection pump of diesel | |
| CN108816592A (en) | Scissor-like jack automatic oiling mechanism | |
| CN1312397C (en) | Fuel oil jet pump | |
| CN201851247U (en) | High-pressure fuel feed pump used for high-pressure common-rail fuel injection system | |
| CN219197487U (en) | Energy-saving consumption-reducing gasoline engine piston | |
| CN208564826U (en) | A kind of high pressure distribution rotor | |
| CN2639547Y (en) | Strengthened fuel-injection pump assembly | |
| CN201934177U (en) | Cooling nozzle of piston of motor with double balance shaft | |
| CN204646495U (en) | Mechanical type Injection Pump | |
| CN204900132U (en) | High -pressure oil pump and engine cylinder block integrated structure | |
| CN202325957U (en) | Single fuel injection pump with high pressure and high injection rate | |
| CN202250531U (en) | Enhanced diesel engine constant-pressure oil injection pump | |
| CN2568830Y (en) | Can of fuel spraying pump | |
| CN1241682A (en) | Secondary liquid spraying system with sealed nozzle cone mixing diesel oil and rustproof liquid | |
| CN215761902U (en) | Nozzle structure and power device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20100317 |