CN201083173Y - Economical diesel engine medium pressure common rail system - Google Patents
Economical diesel engine medium pressure common rail system Download PDFInfo
- Publication number
- CN201083173Y CN201083173Y CNU2007200751735U CN200720075173U CN201083173Y CN 201083173 Y CN201083173 Y CN 201083173Y CN U2007200751735 U CNU2007200751735 U CN U2007200751735U CN 200720075173 U CN200720075173 U CN 200720075173U CN 201083173 Y CN201083173 Y CN 201083173Y
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- common rail
- pressure pump
- diesel engine
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- pump
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Abstract
The utility model relates to a middle pressure common rail system for an economical diesel engine, which comprises a fuel tank, a coarse strainer, a fine strainer, an electronic control unit ECU, a common rail pipe, a high pressure pump, a low pressure pump, a fuel injector, a pressure sensor, a throttle sensor and a revolution speed sensor, wherein the fuel tank is connected with the coarse strainer, the high pressure pump and the common rail pipe respectively, the coarse strainer is connected with the low pressure pump via the electronic control unit ECU, the high pressure pump is connected with the low pressure pump via the fine strainer, the pressure sensor is arranged on the common rail pipe and is connected with the fuel injector, the throttle sensor and the revolution speed sensor are connected with the electronic control unit ECU; the utility model is characterized in that the common rail pipe, the high pressure pump and the low pressure pump are integrated into a whole unit and the utility model has the advantages that the noise and the fuel consumption can be reduced without big change on the original diesel engine and compared with the high pressure common rail system, the structure is simplified and the production and service cost is decreased.
Description
Technical field
The utility model relates in a kind of economical diesel engine presses common rail system, is applicable to engineering machinery power product, belongs to Diesel Engine Technique Field.
Background technique
At present, the domestic diesel engine high pressure co-rail system is mainly used in road vehicle, to satisfy Europe III exhaust emission regulations.Because country does not formulate, implements off roader (product) exhaust emission regulations such as construction machinery product as yet, the industrial diesel engine fuel oil supply system is generally still continued to use traditional pump-pipe-nozzle system in upright arrangement.Minority exports the import diesel engine that has been equipped with the applying high voltage common rail system in the construction machinery product of developed country (area), but costs an arm and a leg.
Pump-pipe-nozzle system cooperates the highest Europe II standard that only can reach of supercharging-absolutely empty ICS intercooler system, pump-pipe-nozzle system in upright arrangement as shown in Figure 1, this system is by fuel tank 1, P type Injection Pump 2, high-pressure oil pipe 3, the P type oil sprayer 4 and the oil purifier 5 that have porous small aperture nozzle are formed, the cylinder head intake duct of optimizing, the shallow ω of the piston head firing chamber of optimizing, two four air valve structures that advance two rows make fuel economy, noise characteristic and toxic emission index make moderate progress, but because this system adopts the mechanical adjustment control mode, be difficult to realize to fuel injection characteristic and injection characteristics in real time, dynamically, sensitive feedback and adjusting, so this system optimization degree is limited, its fuel economy, noise characteristic and toxic emission index reach optimum degree far away.
Conventional pump-pipe-mouth system only regulates fuel feeding zero hour by plunger pretravel and fuel injection advance device according to speed of crankshaft automatically, by speed regulator and tooth bar control fuel delivery, general fuel feeding process has only the main jet stage, influenced by cam of injection pump wheel type and rotating speed less than pre-spray, spray stage afterwards, and injection pressure presents the diagram rule, is difficult to keep constant high pressure, cause the incipient stage in-cylinder combustion sharply to spread, the combustion noise height, the later stage oil-break is slow to cause " oil dripping ", forms soot.
Present high pressure co-rail system as shown in Figure 2, it is made up of fuel tank, thick secondary filter, ECU, low pressure pump, high-pressure service pump, common rail pipe, oil sprayer, sensor and control unit etc.A kind of fuel system that the generation of jet pressure and course of injection are completely separate from each other, by high-pressure service pump high pressure fuel is transported to common rail pipe, by the oil pressure in the common rail pipe being realized accurately control, the size of high pressure pipe pressure and the rotating speed of motor are had nothing to do, can reduce the change in rotational speed of the charge oil pressure of diesel engine significantly with motor.
The oil spout moment and the fuel injection quantity of ECU control oil sprayer, the oil spout moment, fuel injection quantity size depend on the pressure of common rail pipe and the length that solenoid valve is opened the time.The jet pressure of high pressure co-rail system is up to 120MPa～200MPa, can realize multi-stage jet, be at least three grades of injections (pre-spray, main jet, back spray), pre-spray can significantly reduce the noise of diesel engine, the abundant burning to exhaust is finished in the back spray, main jet optimization can improve the diesel engine thermal efficiency, reduces fuel consume, reduces the harmful gas composition.
High pressure co-rail system is by the crankshaft of diesel engine speed probe, cam-position sensor, intake air temperature sensor, exhaust gas temperature sensor, air inlet pressure sensor, fuel temperature sensor, fuel pressure transmitter, oil meter measuring device etc., in real time, accurately feed back fuel feeding and combustion position in the cylinder, and will there be related parameter to pass to ECU, ECU compares feedback signal and calibrating parameters, simultaneously send instruction to each control unit, high pressure fuel supply pump is finished in coordination, common rail pipe holds oily energy storage, oil sprayer is oil spout action according to quantity on time, and it is optimum that injection process (fuel injection rate) is realized, but high pressure co-rail system technical sophistication, form by many precision optical machinery components and parts and electronic component, contain many patents again, thereby make difficult, the cost costliness, the maintenance service cost is higher equally.
Summary of the invention
The purpose of this utility model provides a kind of reduction that realizes diesel engine noise and fuel oil consumption at lower cost, satisfies in the economical diesel engine of terminal client demand and presses common rail system.
For realizing above purpose, the technical solution of the utility model provides in a kind of economical diesel engine and presses common rail system, comprise fuel tank, strainer, secondary filter, electronic control unit ECU, common rail pipe, high-pressure service pump, low pressure pump, oil sprayer, pressure transducer, throttle sensor and speed probe, fuel tank respectively with strainer, high-pressure service pump is connected with common rail pipe, strainer is connected with low pressure pump by electronic control unit ECU, high-pressure service pump is connected with low pressure pump by secondary filter, pressure transducer is located on the common rail pipe, be connected with oil sprayer, throttle sensor is connected with electronic control unit ECU with speed probe, it is characterized in that common rail pipe, high-pressure service pump and low pressure pump become one.
The utility model utilizes the high-pressure common rail oil supply system of simplifying on the basis of conventional diesel engine, reach the purpose that reduces noise and fuel oil consumption, satisfies the requirement of terminal client Economy, and manufacture cost has only limited increase simultaneously.
Realize pump and common rail pipe integral type, simple in structure and compact, the middle pressure of common rail system of pressing is set at about 80MPa, the mechanical load higher pressure common rail system of pump rail body declines to a great extent, thereby the material of pump, rail body, accuracy of manufacturing, sealing structure, manufacturing process etc. are required to reduce, rail is same because mechanical load reduces to the high-pressure oil pipe of oil sprayer, and its material, manufacture process requirement reduce.And because it based on existing diesel engine, except that oil supply system, does not make change to other system and mechanism substantially, realizability is strong.This system only requires oil supply system to realize the secondary injection process, promptly pre-spray and main jet, the ECU program is simple, the quantity of sensor reduces, only need diesel engine speed sensor, fuel pressure transmitter and fuel temperature sensor, what control reaches the purpose that reduces noise and fuel oil consumption thereby realization is to injection timing and oil mass, the relatively high pressure common rail system, and this system's higher pressure common rail system has reduced manufacture difficulty, manufacture cost and service cost significantly.
The utility model has the advantages that does not need to do very big change on existing diesel engine basis, just can reach the purpose that reduces noise and fuel oil consumption, simplifies with the high pressure co-rail system structure compared, and the production service cost reduces.
Description of drawings
Fig. 1 is a pump-pipe-nozzle system structural representation in upright arrangement;
Fig. 2 presses the common rail system structural representation in the former diesel engine;
Fig. 3 presses the common rail system structural representation in a kind of economical diesel engine.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 3, for pressing the common rail system structural representation in a kind of economical diesel engine, press common rail system in a kind of economical diesel engine, comprise fuel tank, strainer, secondary filter, electronic control unit ECU, common rail pipe, high-pressure service pump, low pressure pump, oil sprayer, pressure transducer, throttle sensor and speed probe, fuel tank respectively with strainer, high-pressure service pump is connected with common rail pipe, strainer is connected with low pressure pump by electronic control unit ECU, high-pressure service pump is connected with low pressure pump by secondary filter, pressure transducer is located on the common rail pipe, be connected with oil sprayer, throttle sensor is connected common rail pipe with speed probe with electronic control unit ECU, high-pressure service pump and low pressure pump become one.
During work, the oil spout of electronic control unit ECU control oil sprayer realizes the secondary injection process, promptly pre-spray and main jet.
Claims (1)
1. press common rail system in an economical diesel engine, comprise fuel tank, strainer, secondary filter, electronic control unit ECU, common rail pipe, high-pressure service pump, low pressure pump, oil sprayer, pressure transducer, throttle sensor and speed probe, fuel tank respectively with strainer, high-pressure service pump is connected with common rail pipe, strainer is connected with low pressure pump by electronic control unit ECU, high-pressure service pump is connected with low pressure pump by secondary filter, pressure transducer is located on the common rail pipe, be connected with oil sprayer, throttle sensor is connected with electronic control unit ECU with speed probe, it is characterized in that common rail pipe, high-pressure service pump and low pressure pump become one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200751735U CN201083173Y (en) | 2007-09-29 | 2007-09-29 | Economical diesel engine medium pressure common rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200751735U CN201083173Y (en) | 2007-09-29 | 2007-09-29 | Economical diesel engine medium pressure common rail system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201083173Y true CN201083173Y (en) | 2008-07-09 |
Family
ID=39625639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200751735U Expired - Fee Related CN201083173Y (en) | 2007-09-29 | 2007-09-29 | Economical diesel engine medium pressure common rail system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201083173Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989711A (en) * | 2012-12-04 | 2013-03-27 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Impurity collecting device for oil sprayer |
-
2007
- 2007-09-29 CN CNU2007200751735U patent/CN201083173Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989711A (en) * | 2012-12-04 | 2013-03-27 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Impurity collecting device for oil sprayer |
| CN102989711B (en) * | 2012-12-04 | 2014-12-03 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Impurity collecting device for oil sprayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Henan Lonking Machinery Manufacturing Co., Ltd. Assignor: Lonking (Shanghai) Machinary Manufacturing Co., Ltd. Contract record no.: 2010310000032 Denomination of utility model: Economical diesel engine medium pressure common rail system Granted publication date: 20080709 License type: Exclusive License Record date: 20100413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080709 Termination date: 20140929 |
|
| EXPY | Termination of patent right or utility model |