CN206234034U - A kind of diesel engine high-pressure co-rail system - Google Patents
A kind of diesel engine high-pressure co-rail system Download PDFInfo
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- CN206234034U CN206234034U CN201621348381.3U CN201621348381U CN206234034U CN 206234034 U CN206234034 U CN 206234034U CN 201621348381 U CN201621348381 U CN 201621348381U CN 206234034 U CN206234034 U CN 206234034U
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Abstract
The utility model is related to a kind of diesel engine high-pressure co-rail system, is adapted to be applied on V-type diesel, is that II liter of state III of diesel engine state provides support；Its structure includes：Mechanical system and electric-control system；Mechanical system includes：Fuel tank, high pressure shared-rail oil jetting pump, high-pressure common-rail pipe and fuel injector；High-pressure common-rail pipe includes：The working connection of the first common rail pipe and the second common rail pipe, the first common rail pipe and the second common rail pipe is connected in series by common rail oil pipe；The setting quantity of fuel injector is multiple, and fuel injector is connected by the second high-pressure oil pipe with the working connection of first common rail pipe or the second common rail pipe；Electric-control system includes：ECU, sensor and actuator；ECU includes 2 pieces of ECU.The utility model has can ensure that output oil amount is doubled and redoubled compared to double plunger shared-rail oil jetting pump under any operating mode in life span, oil transfer pump output oil mass, fuel metering valve flow and high-pressure pump output oil mass are significantly increased, common rail pressure is maximum up to 2000bar, and continuous firing pressure energy is maintained at 1600bar.
Description
Technical field
The utility model is related to diesel engine high-pressure co-rail technical field, and in particular to a kind of diesel engine high-pressure co-rail system.
Background technology
Common-rail technology refer to high-pressure oil pump, pressure sensor and ECU composition closed-loop system in, will spray pressure generation
High pressure fuel, common feeder line is transported to by high-pressure oil pump by a kind of fuel system completely separate from each other with course of injection, is led to
Cross and precise control is realized to the oil pressure in common feeder line, make high pressure pipe pressure size unrelated with the rotating speed of engine, can be with
Significantly reduce change of the Fuel Injection Mechanism of Diesel Engine pressure with engine speed, therefore also just reduce the defect of conventional diesel engine.ECU
The distributive value of fuel injector is controlled, distributive value size depends on the length of fuel rail (common feeder line) pressure and electromagnetism valve opening time
It is short.High-pressure common rail electric jet technology refers to the closed-loop system in high-pressure oil pump, pressure sensor and electronic control unit (ECU) composition
In, generation and a kind of course of injection fuel system completely separate from each other of pressure will be sprayed.It is by high pressure by high-pressure oil pump
Fuel oil is transported to common feeder line, and precise control is realized by the oil pressure in common feeder line, make high pressure pipe pressure size with
The rotating speed of engine is unrelated, can significantly reduce the degree that Fuel Injection Mechanism of Diesel Engine pressure changes with engine speed.Wherein, " electricity
Control " refers to injection system by computer control, and ECU (being commonly called as computer) is carried out accurately to the distributive value of each atomizer, oil injection time
Control, can make the fuel economy and dynamic property of diesel engine reach optimal balance, and traditional diesel engine is controlled by machinery
System, control accuracy cannot be ensured." high pressure " refers to that injection system pressure ratio conventional diesel is confidential is higher by 3 times, can reach
To 200MPa (and conventional diesel engine injection pressure is in 60-70MPa), the big atomization of pressure is good to burn fully, so as to improve power
Property, it is finally reached fuel-efficient purpose." common rail " is by common feeder line while supplying each atomizer, distributive value is by ECU
It is accurate to calculate, while providing the fuel oil of same quality, same pressure to each atomizer, operate engine and more smooth out,
So as to Optimization of Diesel Engine combination property.And conventional diesel is by each oil spout of each cylinder, distributive value and pressure are inconsistent, operating
It is uneven, cause burning unstable, noise is big, and oil consumption is high.Diesel engine high-pressure co-rail system is generally using machinery in the prior art
Formula injection pump, the structure of injection pump is generally formed afterwards by high-pressure pump 1 and gear pump 2 are integrated, shown in Fig. 1, the fuel oil warp in fuel tank
Diesel oil pre-flock device 3 filter after enter gear pump 2, the fuel oil pumped out from gear pump 2 through fine filter 4 filter after, further by
High-pressure pump 1 is delivered to, the fuel oil pumped out from high-pressure pump enters after high-pressure common-rail pipe 5 is shunted through fuel injector 6 after being sprayed through plunger
Spray into burning chamber of diesel engine；Wherein, ECU by obtain high-pressure pump feed back data message precise control fuel injector distributive value.
Due to the hydraulic oil that pump plunger is periodically exported, diesel engine of the prior art generally only sets a high pressure
Common rail pipe, plays a part of buffering pulse, permanent rail pressure and storage hydraulic oil, is that rail pressure is unlikely to drop suddenly after fuel injector sprays oil
Low offer structural support.Because diesel engine of the prior art generally sets multiple cylinders, therefore the length of high-pressure common-rail pipe is usual
Needs are made thin long, the engine more for cylinder number, and the physical dimension of high-pressure common-rail pipe can be to the structure cloth of Diesel engine
Office causes image, and further, domestic high-pressure common-rail pipe of the prior art is long due to physical dimension, is limited by machining accuracy
System, it is difficult to bear sufficiently high oil pressure, is also also easy to produce pressure oscillation in use, and then service behaviour to diesel engine is caused not
Good image, while also constraining the development of large-scale diesel engine production domesticization；Additionally, the structure of high pressure co-rail system of the prior art
Set by injection pump, fuel injector and high-pressure common-rail pipe structure problem image for diesel engine in the prior art by II liter of state III of state
Certain image is will also result in, improvement cost required when engine block optimizes is increased.
Therefore a diesel engine high-pressure co-rail system is researched and developed to overcome at least one in above-mentioned technological deficiency as one kind
It is required.
Utility model content
The purpose of this utility model is to provide a kind of diesel engine high-pressure co-rail system, with any operating mode in life span
Under can ensure that output oil amount is doubled and redoubled compared to double plunger shared-rail oil jetting pump, oil transfer pump output oil mass, fuel metering valve flow and
High-pressure pump output oil mass is significantly increased, and common rail pressure maximum can reach 2000bar, and continuous firing pressure energy is maintained at 1600bar
Technological merit, be more suitable for being applied on V-type diesel, be that II liter of state III of diesel engine state provides structural support.
The purpose of this utility model is to be achieved through the following technical solutions：The utility model provides a kind of diesel engine high-pressure
Common rail system, including：Mechanical system and electric-control system；
The mechanical system includes：High pressure shared-rail oil jetting pump, high-pressure common-rail pipe and fuel injector；The high pressure shared-rail oil jetting pump
Including：High-pressure pump and oil transfer pump；The oil transfer pump is arranged on one end of the high-pressure pump, the other end of the high-pressure pump with it is described
Cam shaft for diesel engine drive connection in the gear-box of diesel engine；The connectivity port of the oil transfer pump includes：Oil transfer pump fuel oil is low
It is pressed into fuel tap and oil transfer pump fuel low-pressure delivery valve；The connectivity port of the high-pressure pump includes：High-pressure pump fuel low-pressure inlet valve,
High-pressure pump fuel low-pressure delivery valve and high-pressure pump high pressure delivery valve；The oil transfer pump fuel low-pressure inlet valve by oil transportation oil pipe with
Diesel oil tank is connected；The high-pressure common-rail pipe includes：First common rail pipe and the second common rail pipe, first common rail pipe and second
The working connection of common rail pipe is connected in series by common rail oil pipe；Multiple high-pressure pump high pressure delivery valves are provided with the high-pressure pump, often
It is provided with injection pump plunger on individual high-pressure pump high pressure delivery valve, the injection pump plunger is by the first high-pressure oil pipe and described the
The working connection connection of one common rail pipe or the second common rail pipe；The high-pressure common-rail pipe is provided with common rail spill valve, the high-pressure pump combustion
Oily low pressure delivery valve and common rail spill valve are connected by oil spilling pipeline with the fuel tank；Oil spilling is provided with the fuel injector to connect
Mouthful, the oil spilling interface is connected by oil injector oil return pipeline with the diesel oil tank；The setting quantity of the fuel injector is
Multiple, the fuel injector is connected by the second high-pressure oil pipe with the working connection of first common rail pipe or the second common rail pipe；
The electric-control system includes：ECU, sensor and actuator；The sensor and actuator respectively with it is described
ECU is connected；The ECU includes 2 pieces of ECU；The sensor includes：Cooling-water temperature transmitter, speed of crankshaft
Sensor, admission pressure temperature sensor and engine oil pressure temperature sensor, the camshaft being arranged on high pressure shared-rail oil jetting pump
Rotational position detection device and the rail pressure sensor being arranged on the high-pressure common-rail pipe；The actuator includes：It is arranged on institute
State the fuel metering valve on high pressure shared-rail oil jetting pump and the fuel injector magnetic system being arranged on the fuel injector.
In preferred embodiments, the diesel engine high-pressure co-rail system also includes：Oil water separator and diesel oil filtering
Device；The fuel tank, oil water separator, oil transfer pump, diesel fuel filter and high-pressure pump fuel low-pressure inlet valve are gone here and there successively by oil pipe
Connection connection.
In preferred embodiments, the ECU is additionally provided with OBD diagnostics interfaces.
In preferred embodiments, the high pressure shared-rail oil jetting pump is provided with the semicircle arcuation that radius is 50-60mm
Mounted base；The setting quantity of injection pump plunger is no less than three on the high-pressure pump.
In preferred embodiments, the cam axle position detecting device includes：Fuel injection camshaft phase is passed
Sensor and camshaft phase gear；The camshaft phase gear is fixedly installed on high-pressure pump camshaft, and the injection pump is convex
The setting position of wheel shaft phase detector matches with the set location of the camshaft phase gear；The camshaft phase tooth
Multiple camshaft phase teeth have been uniformly arranged on wheel；When multiple camshaft phase teeth are respectively through the fuel injection camshaft
During the search coverage of phase detector, the fuel injection camshaft phase detector feeds back detection signal.
In preferred embodiments, the profile area of the one of camshaft phase tooth on the camshaft phase gear
Not in remaining camshaft phase tooth, cylinder positioning tooth is sentenced as on camshaft phase gear；Sentence cylinder positioning tooth triggering institute when described
When stating fuel injection camshaft phase detector, the piston of the cylinder of the diesel engine first is located at a cylinder top dead center position；The oil spout
The rotary speed information of camshaft described in pump camshaft phase sensor synchronous feedback.
In preferred embodiments, it is described sentence cylinder positioning tooth profile be：On the basis of original wheel tooth outline, in wheel
Groove with high-pressure pump camshaft diameter parallel is further set on tooth.
In preferred embodiments, the fuel injector is screw thread pressing type fuel injector；The screw thread pressing type fuel injector
Including：Fuel injector shell, alignment pin is provided with the screw thread pressing type fuel injector；It is socketed with the middle part of the fuel injector shell
External thread sleeve；The external thread sleeve coordinates with the fuel injector housing slot, and the two ends of the external thread sleeve are described by being arranged on respectively
The shaft shoulder in the middle part of fuel injector shell, and it is spacing with the fixing nut that the fuel injector outer casing screw is connected, the external thread sleeve possesses
Around the free degree of fuel injector housing axis revolution；The bottom of the external thread sleeve is provided with external screw thread, the fuel injector shell
The screw thread of upper setting is reverse with the external screw thread；The outer wall of the external thread sleeve is provided with the dogging shoulder being adapted with spanner bayonet socket profile
Or draw-in groove.
In preferred embodiments, perpendicular to the fuel injector housing axis, the sectional view of the dogging shoulder or draw-in groove
It is the one kind in regular polygon.
In preferred embodiments, the screw thread pressing type fuel injector is provided with oil inlet and oil return opening.
The beneficial effects of the utility model are：The utility model by providing a kind of diesel engine high-pressure co-rail system, effectively
Solve the technical problem for the discharge standard of high-power diesel engine in the prior art being upgraded to from state II and being overcome needed for state III,
High pressure co-rail system after improvement possesses the maximum reachable 2000bar of common rail pressure in terms of high-pressure common rail fuel oil injection, continues work
Make technical characterstic of the pressure energy stabilization in 1600bar；Wherein, high pressure shared-rail oil jetting pump is used to for low-voltage fuel pressurization to turn into high pressure
Fuel oil, and wait the jeting instruction of ECU；After said structure, high pressure shared-rail oil jetting pump in whole life span with
And can ensure that fuel delivery meets the technical requirements of diesel engine oil spout under predetermined rail pressure under any operating mode, can fully meet oil
Amount balance；Further, high pressure shared-rail oil jetting pump is because using being directly driven by cam shaft for diesel engine, the other end of high-pressure pump leads to
Gear drive is crossed to complete in gear-box to engage with cam shaft for diesel engine, therefore lubricating system can further be improved to machine oil profit
It is sliding, and integrated with the lubricant passage way of diesel engine gear-box with by the lubricant passage way of high pressure shared-rail oil jetting pump, the profit of backflow
Lubricating oil can be back to gear-box in the form of overflowing, and reach the technique effect for saving the setting of lubricating oil return pipeline；Fuel oil meter
Amount valve set can comprehensive adjustment enter injection pump plunger chamber fuel flow, and then reach control high-pressure common-rail pipe in fuel oil
The technique effect of pressure；The utility model is set to double common rail structures by by high-pressure common-rail pipe, can preferably reach pressure accumulation
With the technique effect of distribution fuel oil, fuel pressure fluctuation and limitation fuel oil maximum pressure can be effectively damped；Further, it is double
Common rail structure can also be further up to the technology effect for making the structure of high-pressure common-rail pipe further match with V-type diesel structure
Really, two high-pressure common-rail pipes being connected in series can divide the both sides for being listed in V-type diesel, save assembly space, be diesel engine more
For rational structure arrangement provides structural support；The diesel engine steady operation that is set to of electric-control system provides strong structure branch
Hold, ECU can collect the real-time working condition information of coupled each sensor feedback, through data analysis and logic judgment
It is determined that being adapted to the optimization control parameter of engine current working, and these parameters are changed into electric signal output to corresponding execution
Device；Additionally, electric-control system can also be according to fuel injection advanced angle, camshaft location corner and crank position corner, in advance 2
Fuel feeding time difference is set in block ECU；The utility model is used as ECU by using two pieces of ECU, at most can control simultaneously
16 fuel injector work, to apply the utility model the diesel engine more than 8 cylinders to provide strong structural support；Using this
After the above-mentioned electric-control system of utility model, the combustion process of cylinder of diesel engine can be realized with the various working conditions changes residing for diesel engine
Further agree with matching, can further improve diesel engine power output, reduce the oil consumption of diesel engine and reduce pollution
The discharge of thing；When electric-control system detects fault message, fault message and signal an alert can be stored, moreover it is possible to according to failure
The order of severity makes accurate judgement and automatically cuts off flow paths, reduces the power output of diesel engine, until stop diesel engine operating,
It is heavily damaged to protect diesel engine to avoid.
Further, the utility model is by further setting oil water separator and diesel oil for diesel engine high-pressure co-rail system
Cleaner, provides as diesel engine high-pressure co-rail system the fuel delivery more cleaned in the way of filtering, and is the stabilization of diesel engine
Work provides strong structural support.
Further, the utility model is by further setting OBD diagnostics interfaces for diesel engine high-pressure co-rail system,
For electric-control system, more accurately Diagnosis of Diesel working condition provides strong structural support；Wherein, OBD fault diagnosises connect
Mouthful for monitoring diesel engine failure diagnosis code provide structural support, during diagnosis by diesel engine feedback DTC both
Can determine that the fault mode of diesel engine.
Further, the utility model is the semicircle arcuation of 50-60mm by setting radius on high pressure shared-rail oil jetting pump
Mounted base, help to reach can convenient adjustment injection pump relative to the setting angle of diesel engine technique effect,
And can further obtain and high pressure shared-rail oil jetting pump can be used inclination 450Assembling form be arranged on V-type Design of High Pressure Common Rail Diesel Engine
On technique effect, help to make full use of the idle space that caves in of V-type Design of High Pressure Common Rail Diesel Engine, further reduce V-type it is high
Pressure common rail diesel engine physical dimension, makes V-type Design of High Pressure Common Rail Diesel Engine its space structure will be more compact；Additionally, the utility model
Also set no less than three injection pump plungers by high-pressure pump, be that high pressure shared-rail oil jetting pump realizes output oil mass into multiplication
Long, common rail pressure is maximum up to 2000bar, and continuous firing pressure energy stabilization provides further strong structure in 1600bar
Support, strong structural support is provided to meet the fuel feeding needs of large-diameter high-power engine of more than cylinder diameter 128mm, it is more suitable
Conjunction is used on the diesel engine of high-power large-diameter.
Further, the utility model sets cam axle position detecting device by high-pressure pump, is sprayed by detecting
The rotation of cam of injection pump axle reaches the technique effect of same detection rotary speed of diesel engine, engine cam and injection pump cam
There is directly rotation transitive relation in axle, the test position of cam axle position detecting device is shifted from engine cam
Help to obtain the convenient technique effect for improving engine block performance to fuel injection camshaft, when needing to improve cam axle
During the detection function of position detecting device, without related improvement diesel engine cylinder block structure, the internal mechanical of injection pump need to be only adjusted
Structure can reach same technique effect, help to reduce the improvement R＆D costs of diesel engine.
Further, the internal structure that the utility model passes through further improvement cam axle position detecting device,
The profile of the one of camshaft phase tooth on camshaft phase gear is set to be different from remaining camshaft phase tooth, is led to
Cross the different position sensing signals of fuel injection camshaft phase detector feedback and reach the further detection cylinder top dead centre of oil pump one
The technique effect of position, can further provide the positional information of crankshaft of diesel engine, be further to facilitate monitoring diesel engine
Working condition and engine maintenance strong structural support is provided.
Further, the utility model is set to gear teeth middle setting by will sentence the profile of cylinder positioning tooth has and camshaft
The camshaft phase tooth of the groove of diameter parallel, helps to make structure on the basis of original camshaft phase gear structure and changes
Enter, need to only be processed on original one of gear teeth of camshaft phase gear and be easy to fuel injection camshaft phase detector to know
Other groove can reach above-mentioned technique effect, so need to only make small improvement to the structure of camshaft phase gear can
Increase the technique effect of the further detection cylinder top dead center position of diesel engine one for cam axle position detecting device.
Further, the utility model is covered by using screw thread pressing type fuel injector by the middle part of fuel injector shell
External thread sleeve, and the shaft shoulder by being arranged in the middle part of the fuel injector shell are connect, and the fixed spiral shell being connected with fuel injector outer casing screw
It is female spacing to external thread sleeve, the technique effect that external thread sleeve can freely be rotated on fuel injector shell has been reached, it is arranged on external thread sleeve
On screw thread can with the oil injector hole in cylinder head formed screw thread coordinate, on fuel injector fixed alignment pin also be arranged on gas
Dowel hole on cylinder cap forms gap and coordinates, and can be that the rigging position positioning of fuel injector plays good fixed effect, fills
Timing just can reach the technique effect for press-fiting that fuel injector and fuel injector will not rotate with thread bush by rotating external thread sleeve.
Brief description of the drawings
The utility model is described in further detail below according to accompanying drawing.
Fig. 1 is the structural representation of diesel engine high-pressure co-rail system in the utility model embodiment 1；
Fig. 2 is the mesohigh shared-rail oil jetting pump structural representation of the utility model embodiment 1；
Fig. 3 is the mesohigh shared-rail oil jetting pump assembling structure schematic diagram of the utility model embodiment 1；
Fig. 4 is the structural representation of diesel engine high-pressure co-rail system in the utility model embodiment 2；
Fig. 5 is the convexity wheel shaft rotational position detection device machine construction principle figure of the utility model embodiment 3；
Fig. 6 is the convexity wheel shaft rotational position detection device improved structure schematic diagram of the utility model embodiment 3；
Fig. 7 is fuel injector structure schematic diagram in the utility model embodiment 4；
Fig. 8 is zoomed-in view at A in Fig. 7.
In figure：
100th, diesel oil tank；200th, high pressure shared-rail oil jetting pump；210th, high-pressure pump；211st, high-pressure pump fuel low-pressure oil-feed
Valve；212nd, high-pressure pump fuel low-pressure delivery valve；213rd, high-pressure pump high pressure delivery valve；214th, injection pump plunger；215th, the first high pressure
Oil pipe；220th, oil transfer pump；230th, mounted base；221st, oil transfer pump fuel low-pressure inlet valve；222nd, oil transfer pump fuel low-pressure is fuel-displaced
Valve；300th, high-pressure common-rail pipe；301st, oil spilling pipeline；310th, the first common rail pipe；320th, the second common rail pipe；330th, common rail oil pipe；
340th, common rail spill valve；400th, fuel injector；410th, oil spilling interface；411st, oil injector oil return pipeline；420th, the second high-pressure oil pipe；
430th, fuel injector shell；431st, the shaft shoulder；432nd, fixing nut；440th, alignment pin；450th, external thread sleeve；451st, dogging shoulder；460th, oil spout
Device magnetic valve；500th, power supply；600th, ECU；710th, fuel metering valve；720th, cam axle position detecting device；721、
Fuel injection camshaft phase detector；722nd, camshaft phase gear；723rd, camshaft phase tooth；724th, cylinder positioning tooth is sentenced；
730th, rail pressure sensor；740th, cooling-water temperature transmitter；750th, engine oil pressure temperature sensor；760th, admission pressure temperature is passed
Sensor；770th, crankshaft rotational speed sensor；780th, OBD diagnostics interfaces；800th, oil water separator；900th, diesel fuel filter；B、
High pressure shared-rail oil jetting pump.
Specific embodiment
Embodiment 1：
As shown in figure 1, the utility model provides a kind of diesel engine high-pressure co-rail system, including：Mechanical system and automatically controlled system
System；
The mechanical system includes：High pressure shared-rail oil jetting pump 200, high-pressure common-rail pipe 300 and fuel injector 400；Wherein, it is described
The structure of high pressure shared-rail oil jetting pump 200 is as shown in Figure 2；The high pressure shared-rail oil jetting pump 200 includes：High-pressure pump 210 and oil transfer pump
220；The oil transfer pump 220 is arranged on one end of the high-pressure pump 210, the other end of the high-pressure pump 210 and the diesel engine
Gear-box in cam shaft for diesel engine drive connection；The connectivity port of the oil transfer pump 220 includes：Oil transfer pump fuel low-pressure enters
Fuel tap 221 and oil transfer pump fuel low-pressure delivery valve 222；The connectivity port of the high-pressure pump 210 includes：High-pressure pump fuel low-pressure enters
Fuel tap 211, high-pressure pump fuel low-pressure delivery valve 212 and high-pressure pump high pressure delivery valve 213；The oil transfer pump fuel low-pressure inlet valve
221 are connected by oil transportation oil pipe with the fuel tank 100；The high-pressure common-rail pipe 300 includes：First common rail pipe 310 and second is common
Rail pipe 320, the working connection of the common rail pipe 320 of first common rail pipe 310 and second is connected in series by common rail oil pipe 330；It is described
Multiple high-pressure pump high pressure delivery valves 213 are provided with high-pressure pump 210, oil spout is provided with each high-pressure pump high pressure delivery valve 213
Pump plunger 214, the injection pump plunger 214 passes through the first high-pressure oil pipe 215 and the common rail pipe of first common rail pipe 310 or second
320 working connection connection；The high-pressure common-rail pipe 300 is provided with common rail spill valve 340, the high-pressure pump fuel low-pressure delivery valve
212 and common rail spill valve 340 connected with diesel oil tank 100 by oil spilling pipeline 301；It is provided with the fuel injector 400
Oil spilling interface 410, the oil spilling interface 410 is connected by oil injector oil return pipeline 411 with the diesel oil tank 100；It is described
The setting quantity of fuel injector 400 is multiple, and the fuel injector 400 passes through the second high-pressure oil pipe 420 and first common rail pipe 310
Or second common rail pipe 320 working connection connection；
The electric-control system includes：ECU 600, sensor and actuator, the sensor and actuator respectively with
The ECU connection；The ECU includes 2 pieces of ECU；The sensor includes：Cooling-water temperature transmitter 740, song
Shaft speed transducer 770, admission pressure temperature sensor 760 and engine oil pressure temperature sensor 750, it is arranged on high-pressure common rail
Cam axle position detecting device 720 and the rail pressure sensor being arranged on the high-pressure common-rail pipe on injection pump 200
730；The actuator includes：The fuel metering valve 710 that is arranged on the high pressure shared-rail oil jetting pump and it is arranged on the oil spout
Fuel injector magnetic system 460 on device.
Power supply 500 illustrated in Fig. 1 is connected with the ECU 600, because ECU of the prior art is equal
Be provided with power connection, the setting of power supply 500 also non-major technique improvement of the present utility model, therefore in the present embodiment with power supply
Relevant technical information do not illustrate further and repeat.
Under diesel engine working condition, ejected by the multiple injection pump plungers 214 set on high pressure shared-rail oil jetting pump 200
High pressure fuel flows into the working connection of the first common rail pipe 310 and the second common rail pipe 320 through oil pipe, in the first common rail pipe 310 and second
The oil pressure high of stable equilibrium is formed in the working connection of common rail pipe 320, high pressure fuel is through the first common rail pipe 310 and the second common rail pipe
Fuel injector 400 is flowed into by single oil pipe respectively after 320 shuntings, and then is reached for the uniform voltage stabilizing fuel feeding of each cylinder of diesel engine
Technique effect.The above-mentioned diesel engine high-pressure co-rail system of the utility model is particularly suitable for V-type diesel, the first common rail pipe
310 and second common rail pipe 320 can be respectively used to the cylinder fuel feeding for being arranged on V-type diesel both sides, help to reach shortening existing
There is the technique effect of diesel engine high-pressure co-rail length of tube, and then external structure that can be more reasonably using V-type diesel is empty
Between, the physical dimension of Optimization of Diesel Engine.Additionally, all the way by the fuel metering unit in high-pressure pump after fuel oil enters high-pressure pump
Into injection pump plunger, it is boosted after enter high-pressure common-rail pipe, another road configured oil spilling on high-pressure pump of unnecessary fuel oil
Valve is back to fuel tank；The Main Function of fuel metering valve is the oil mass in the high-pressure plunger chamber that regulation enters injection pump plunger, is used for
Fuel pressure in control high-pressure common-rail pipe.
Further, the utility model sets cam axle position detecting device by high-pressure pump, is sprayed by detecting
The rotation of cam of injection pump axle reaches the technique effect of same detection rotary speed of diesel engine, cam shaft for diesel engine and injection pump cam
There is directly rotation transitive relation in axle, the test position of cam axle position detecting device is shifted from engine cam
Help to obtain the convenient technique effect for improving engine block performance to fuel injection camshaft, when needing to improve cam axle
During the detection function of position detecting device, without related improvement diesel engine cylinder block structure, the internal mechanical of injection pump need to be only adjusted
Structure can reach same technique effect, help to reduce the improvement R＆D costs of diesel engine.
It should be noted that in the present embodiment, the structure of high pressure shared-rail oil jetting pump and fuel injector is prior art, therefore its
Detailed internal configuration information is not illustrated further and repeated in detail herein.
The utility model is solved big work(in the prior art by providing a kind of diesel engine high-pressure co-rail system, effectively
The technical problem that the discharge standard of rate diesel engine overcomes needed for upgrading to state III from state II, the high pressure co-rail system after improvement is in height
It is maximum up to 2000bar, skill of the continuous firing pressure energy stabilization in 1600bar that pressure common rail fuel injection aspect possesses common rail pressure
Art feature；Wherein, high pressure shared-rail oil jetting pump is used to for low-voltage fuel pressurization to turn into high pressure fuel, and waits the spray of ECU
Penetrate instruction；After said structure, high pressure shared-rail oil jetting pump can ensure to supply in whole life span and under any operating mode
Oil mass meets the technical requirements of diesel engine oil spout under predetermined rail pressure, can fully meet oil mass balance；Further, high pressure is common
Rail oil jetting pump is because using being directly driven by cam shaft for diesel engine, the other end of high-pressure pump passes through gear drive and diesel engine cam
Axle completes engagement in gear-box, therefore lubricating system can further be improved to oil lubricating, and with by high pressure shared-rail oil jetting pump
Lubricant passage way integrated with the lubricant passage way of diesel engine gear-box, the lubricating oil of backflow can be returned in the form of overflowing
To gear-box, the technique effect for saving the setting of lubricating oil return pipeline is reached；The setting of fuel metering valve can comprehensive adjustment with
The fuel flow on its connected Ge Fa road, and then reach the technique effect of control high-pressure common-rail pipe fuel pressure；Common rail oil spilling
Valve can be opened when pressure exceedes setting value, during for ensureing pressure anomaly occur in high-pressure common-rail pipe, pressure be discharged rapidly,
And then ensure the oil circuit safety of whole high pressure co-rail system；The utility model is set to double common rail knots by by high-pressure common-rail pipe
Structure, can preferably reach the technique effect of pressure accumulation and distribution fuel oil, can effectively damp fuel pressure fluctuation and limitation combustion
Oily maximum pressure；When using above-mentioned high pressure co-rail system to distribute fuel oil for twelve-cylinder diesel engine, settable four sprays of high-pressure pump
Fuel feed pump plunger mean allocation feeds back real to two first common rail pipes and the second common rail pipe of series connection by a pressure sensor
When rail pressure, and the overall output oil mass precise control rail pressure of high pressure shared-rail oil jetting pump is further controlled by fuel metering valve；Enter
One step, double common rail structures can also be further up to making the structure of high-pressure common-rail pipe and V-type diesel structure further phase
The technique effect matched somebody with somebody, two high-pressure common-rail pipes being connected in series can divide the both sides for being listed in V-type diesel, save assembly space,
For the more rational structure arrangement of diesel engine provides structural support；Electric-control system be set to diesel engine steady operation provide have
The structural support of power, ECU can collect the real-time working condition information of coupled each sensor feedback, through data analysis
And logic judgment determines to be adapted to the optimization control parameter of engine current working, and by these parameters be changed into electric signal output to
Corresponding actuator；Further, electric-control system can also be according to fuel injection advanced angle, camshaft location corner and bent axle position
Corner is put, fuel feeding time difference is set in 2 pieces of ECU in advance；The utility model is used as ECU, energy by using two pieces of ECU
Enough 16 fuel injector work of at most control simultaneously, it is strong to apply the utility model the diesel engine more than 8 cylinders to provide
Structural support；After the above-mentioned electric-control system of the utility model, the combustion process of cylinder of diesel engine can with residing for diesel engine
Various working conditions changes are realized further agreeing with matching, can further improve diesel engine power output, reduce diesel engine
Oil consumption and reduce pollutant discharge；When electric-control system detects fault message, fault message can be stored and alarm signal is sent
Number, moreover it is possible to accurate judgement is made according to fault severity level and automatically cuts off flow paths or closing diesel engine inlet valve, reduce bavin
The power output of oil machine, until stop diesel engine operating, it is heavily damaged to protect diesel engine to avoid.Additionally, this practicality
It is new due on high-pressure pump set be no less than three injection pump plungers, and by low pressure from oil transfer pump to high-pressure pump delivery of sufficient amounts
Fuel oil, is that high pressure shared-rail oil jetting pump realizes that output oil mass is doubled and redoubled, and common rail pressure is maximum up to 2000bar, continuous firing pressure
Power can be stablized in the further strong structural support of 1600bar offers, to meet the vat caliber high power of more than cylinder diameter 128mm
The fuel feeding of engine needs to provide strong structural support, is more suitable for being used on the diesel engine of high-power large-diameter.
It should be noted that the above-mentioned fuel supply advance angle of the utility model refers to：High pressure shared-rail oil jetting pump starts to diesel engine
In cylinder during fuel feeding, diesel engine piston top is apart from the crank angle corresponding to top dead centre.
Preferably, shown in Fig. 2, in an optimal technical scheme of the present embodiment, the high pressure shared-rail oil jetting pump is set
There is the mounted base 230 of the semicircle arcuation that radius is 50-60mm；The setting quantity of injection pump plunger 214 is not on the high-pressure pump
Less than three.The utility model is the assembling base of the semicircle arcuation of 50-60mm by setting radius on high pressure shared-rail oil jetting pump
Seat, helping to reach can adjust technique effect of the injection pump relative to the setting angle of diesel engine by convenient, and can enter one
Step obtains the technology effect that high pressure shared-rail oil jetting pump can be arranged on using inclined assembling form on V-type Design of High Pressure Common Rail Diesel Engine
Really.
As shown in figure 3, the high pressure shared-rail oil jetting pump B is the injection pump for V-type Design of High Pressure Common Rail Diesel Engine；When the spray
Oil pump is assemblied in when on V-type Design of High Pressure Common Rail Diesel Engine by the mounted base, the axis of the injection pump plunger and the V-type
The angulation of the mounting plane of Design of High Pressure Common Rail Diesel Engine is 45 °.The utility model inclines 45 ° by the way that high pressure shared-rail oil jetting pump is used
Assembling form be arranged on V-type Design of High Pressure Common Rail Diesel Engine on, help to make full use of caving in for V-type Design of High Pressure Common Rail Diesel Engine idle
Space, further reduces the technique effect of V-type Design of High Pressure Common Rail Diesel Engine physical dimension, the V-type high pressure co-rail diesel after improvement
Machine its space structure will be more compact.It should be noted that in the present embodiment above-mentioned V-type Design of High Pressure Common Rail Diesel Engine mounting plane
Refer to that V-type Design of High Pressure Common Rail Diesel Engine lower end is used for and the plane where the lower surface of the connection end of diesel car Frame Assembling.
Embodiment 2：
Shown in Fig. 4, on the basis of embodiment 1, the diesel engine high-pressure co-rail system also includes the present embodiment：Profit point
From device 800 and diesel fuel filter 900；The diesel oil tank 100, oil water separator 800, oil transfer pump 220, diesel fuel filter
900 and high-pressure pump fuel low-pressure inlet valve 211 be sequentially connected in series by oil pipe.The utility model is total to by for diesel engine high-pressure
Rail system further sets oil water separator and diesel fuel filter, is provided more as diesel engine high-pressure co-rail system in the way of filtering
It is the fuel delivery of cleaning, for the steady operation of diesel engine provides strong structural support.
Preferably, as shown in figure 4, in an optimal technical scheme of the present embodiment, the ECU is additionally provided with
OBD diagnostics interfaces 780.The utility model detects sensing dress by further setting OBD for diesel engine high-pressure co-rail system
Put, for electric-control system, more accurately Diagnosis of Diesel working condition provides strong structural support；Wherein, OBD detections are passed
Induction device can effectively detect the working condition on the Ge Fa roads that two pieces of ECU are connected respectively, can timely by abnormality
ECU is fed back to as electronic signals, and the finger of diesel engine running status is adjusted under the analysis of ECU
Order, and then reach the technique effect of protection diesel engine immediately.
Embodiment 3：
Shown in Fig. 5, on the basis of above-described embodiment, the cam axle position detecting device includes the present embodiment：Spray
Cam of injection pump axle phase detector 721 and camshaft phase gear 722；The camshaft phase gear 722 is fixedly installed on height
On press pump camshaft, the setting position of the setting position of the fuel injection camshaft phase detector and the camshaft phase gear
Put and match；Multiple camshaft phase teeth have been uniformly arranged on the camshaft phase gear；When multiple camshaft phases
Tooth respectively through the fuel injection camshaft phase detector search coverage when, the fuel injection camshaft phase detector is anti-
Feedback detection signal.
The utility model sets cam axle position detecting device by high-pressure pump, by detecting fuel injection camshaft
Rotation reach the technique effect of same detection rotary speed of diesel engine, engine cam exists direct with fuel injection camshaft
Rotation transitive relation, the test position of cam axle position detecting device from engine cam is transferred to injection pump convex
Wheel shaft helps to obtain the convenient technique effect for improving engine block performance, is filled when the detection of improvement cam axle position is needed
During the detection function of putting, without related improvement diesel engine cylinder block structure, the internal mechanical structure that need to only adjust injection pump can reach
To same technique effect, help to reduce the improvement R＆D costs of diesel engine.
Preferably, as shown in fig. 6, in an optimal technical scheme of the present embodiment, on the camshaft phase gear
One of camshaft phase tooth shape differentiation in remaining camshaft phase tooth 723, as on camshaft phase gear
Sentence cylinder positioning tooth 724；When it is described sentence cylinder positioning tooth 724 and trigger the fuel injection camshaft phase detector 721 when, the diesel oil
The piston of the cylinder of machine first is located at a cylinder top dead center position；The fuel injection camshaft phase detector feeds back the camshaft simultaneously
Rotary speed information.
The internal structure that the utility model passes through further improvement cam axle position detecting device, by camshaft phase
The profile of the one of camshaft phase tooth on the gear of position is set to be different from remaining camshaft phase tooth, can be further
The positional information of crankshaft of diesel engine is provided, is that the working condition and engine maintenance of further convenient monitoring diesel engine are provided with
The structural support of power.
Preferably, as shown in fig. 6, in an optimal technical scheme of the present embodiment, the profile for sentencing cylinder positioning tooth
For：On the basis of original wheel tooth outline, the groove with high-pressure pump camshaft diameter parallel is further set on the gear teeth.
The utility model is set to gear teeth middle setting by will sentence the profile of cylinder positioning tooth to be had and camshaft diameter parallel
Groove camshaft phase tooth, help to be made on the basis of original camshaft phase gear structure structure and improve, only need
Processed on original one of gear teeth of camshaft phase gear and be easy to the recessed of fuel injection camshaft phase detector identification
Groove can reach above-mentioned technique effect, and then it can be cam that small improvement need to be only made to the structure of camshaft phase gear
Axle rotational position detection device increases the technique effect of the further detection cylinder top dead center position of diesel engine one.
Embodiment 4：
As shown in Figure 7 and Figure 8, on the basis of above-described embodiment, the fuel injector 400 press-fits spray to the present embodiment for screw thread
Oily device；The screw thread press-fits fuel injector to be included：Fuel injector shell 430, alignment pin is provided with the screw thread pressing type fuel injector
440；External thread sleeve 450 is socketed with the middle part of the fuel injector shell；The external thread sleeve 450 and the gap of fuel injector shell 430
Coordinate, the two ends of the external thread sleeve respectively by the shaft shoulder 431 being arranged in the middle part of the fuel injector shell, and with the fuel injector
The fixing nut 432 of outer casing screw connection is spacing, and the external thread sleeve 450 possesses around the axis of fuel injector shell 430 revolution
The free degree；The bottom of the external thread sleeve is provided with external screw thread, and the screw thread set on the fuel injector shell is anti-with the external screw thread
To；The outer wall of the external thread sleeve is provided with the dogging shoulder or draw-in groove 451 being adapted with spanner bayonet socket profile.
Preferably, in an optimal technical scheme of the present embodiment, perpendicular to the fuel injector housing axis, the card
The sectional view of shoulder or draw-in groove is the one kind in regular polygon.
Preferably, in an optimal technical scheme of the present embodiment, the pressing type fuel injector of the screw thread 7 is provided with oil-feed
Mouth and oil return opening.
The internal structure of above-mentioned fuel injector has no the similarities and differences with fuel injector of the prior art in the present embodiment, in the prior art
The main fuel injector magnetic system as shown in injector body, oil nozzle, needle valve assembly, spring and Fig. 7 of fuel injector its internal structure
460 grade parts constitute, and in 460 no power of fuel injector magnetic system, be pressed on ball valve on valve seat by armature, now control room and pressure
Power room pressure is balanced, and oil nozzle needle-valve is tightly pressed against on oil nozzle seat surface by initial tension of spring and does not lift, i.e. fuel injector not oil spout；When
During solenoid valves, magnetic valve is lifted armature by suction, and now fuel oil is leaked through ball valve metering-orifice in control room, controls chamber pressure
Power declines rapidly, and pressure chamber pressure is not changed in, so that oil nozzle needle-valve is lifted, i.e. fuel injector commencement of fuel injection；Work as magnetic valve
During closing, the pressure of control room rises, and oil nozzle needle-valve pressure at two ends is balanced again, the oil nozzle needle-valve in the presence of initial tension of spring
Take a seat, so that closing fuel injector completes injection process.Due to not this reality of the internal structure on fuel injector of the prior art
With new main technical point, therefore do not illustrate further herein.
It should be noted that the structure of fuel injector magnetic system 460 is also prior art in the present embodiment, therefore its detailed inner
Structure is not also illustrated further and repeated.
The utility model is socketed external thread sleeve by using screw thread pressing type fuel injector by the middle part of fuel injector shell,
And the shaft shoulder by being arranged in the middle part of the fuel injector shell, and the fixing nut being connected with fuel injector outer casing screw is to external thread sleeve
It is spacing, the technique effect that external thread sleeve can freely be rotated on fuel injector shell has been reached, it is arranged on the screw thread energy on external thread sleeve
Enough oil injector holes with cylinder head form screw thread cooperation, on fuel injector fixed alignment pin also be arranged in cylinder head
Dowel hole forms gap and coordinates, and can be that the rigging position positioning of fuel injector plays good fixed effect, passes through during assembling
Rotation external thread sleeve just can reach the technique effect for press-fiting that fuel injector and fuel injector will not rotate with thread bush.The utility model leads to
The presser type crossed in fuel injector is installed compared to existing technology by the way of above-mentioned screw thread press-fits is arranged in attachment structure and reduces
All multi-parts, it is when diesel engine upgrades to state III from state II more small to the change made needed for cylinder cover for diesel engine, greatly
Width reduce diesel engine from state II upgrade to state III when R＆D costs.
The utility model is not limited to above-mentioned preferred forms, and anyone can draw under enlightenment of the present utility model
Other various forms of products, however, make any change in its shape or structure, it is every with same as the present application or phase
Approximate technical scheme, all falls within protection domain of the present utility model.
Claims (10)
1. a kind of diesel engine high-pressure co-rail system, it is characterised in that including：Mechanical system and electric-control system；
The mechanical system includes：High pressure shared-rail oil jetting pump, high-pressure common-rail pipe and fuel injector；The high pressure shared-rail oil jetting pump bag
Include：High-pressure pump and oil transfer pump；The oil transfer pump is arranged on one end of the high-pressure pump, the other end of the high-pressure pump and the bavin
Cam shaft for diesel engine drive connection in the gear-box of oil machine；The connectivity port of the oil transfer pump includes：Oil transfer pump fuel low-pressure
Inlet valve and oil transfer pump fuel low-pressure delivery valve；The connectivity port of the high-pressure pump includes：High-pressure pump fuel low-pressure inlet valve, height
Press pump fuel low-pressure delivery valve and high-pressure pump high pressure delivery valve；The oil transfer pump fuel low-pressure inlet valve passes through oil transportation oil pipe and bavin
Oil machine fuel tank is connected；The high-pressure common-rail pipe includes：First common rail pipe and the second common rail pipe, first common rail pipe and second are total to
The working connection of rail pipe is connected in series by common rail oil pipe；Multiple high-pressure pump high pressure delivery valves are provided with the high-pressure pump, each
Injection pump plunger is provided with high-pressure pump high pressure delivery valve, the injection pump plunger passes through the first high-pressure oil pipe and described first
The working connection connection of common rail pipe or the second common rail pipe；The high-pressure common-rail pipe is provided with common rail spill valve, the high-pressure pump fuel oil
Low pressure delivery valve and common rail spill valve are connected by oil spilling pipeline with the fuel tank；Oil spilling is provided with the fuel injector to connect
Mouthful, the oil spilling interface is connected by oil injector oil return pipeline with the diesel oil tank；The setting quantity of the fuel injector is
Multiple, the fuel injector is connected by the second high-pressure oil pipe with the working connection of first common rail pipe or the second common rail pipe；
The electric-control system includes：ECU, sensor and actuator；The sensor and actuator are automatically controlled with described respectively
Unit is connected；The ECU includes 2 pieces of ECU；The sensor includes：Cooling-water temperature transmitter, speed of crankshaft sensing
Device, admission pressure temperature sensor and engine oil pressure temperature sensor, the cam axle being arranged on high pressure shared-rail oil jetting pump
Position detecting device and the rail pressure sensor being arranged on the high-pressure common-rail pipe；The actuator includes：It is arranged on the height
Fuel metering valve and the magnetic valve being arranged on the fuel injector on pressure shared-rail oil jetting pump.
2. diesel engine high-pressure co-rail system according to claim 1, it is characterised in that：The diesel engine high-pressure co-rail system
Also include：Oil water separator and diesel fuel filter；The combustion of the fuel tank, oil water separator, oil transfer pump, diesel fuel filter and high-pressure pump
Oily low pressure inlet valve is sequentially connected in series by oil pipe.
3. diesel engine high-pressure co-rail system according to claim 1, it is characterised in that：The ECU is additionally provided with
OBD diagnostics interfaces.
4. diesel engine high-pressure co-rail system according to claim 1, it is characterised in that：The high pressure shared-rail oil jetting pump is set
There is the mounted base of the semicircle arcuation that radius is 50-60mm；The setting quantity of injection pump plunger is no less than three on the high-pressure pump
It is individual.
5. diesel engine high-pressure co-rail system according to claim 4, it is characterised in that：The cam axle position detection
Device includes：Fuel injection camshaft phase detector and camshaft phase gear；The camshaft phase gear is fixedly installed on
On high-pressure pump camshaft, the setting of the setting position of the fuel injection camshaft phase detector and the camshaft phase gear
Position matches；Multiple camshaft phase teeth have been uniformly arranged on the camshaft phase gear；When multiple camshaft phases
Position tooth respectively through the fuel injection camshaft phase detector search coverage when, the fuel injection camshaft phase detector
Feedback detection signal.
6. diesel engine high-pressure co-rail system according to claim 5, it is characterised in that：On the camshaft phase gear
The shape differentiation of one of camshaft phase tooth is determined in remaining camshaft phase tooth as the cylinder of sentencing on camshaft phase gear
Position tooth；When it is described sentence cylinder positioning tooth trigger the fuel injection camshaft phase detector when, the piston of the cylinder of the diesel engine first
Positioned at a cylinder top dead center position；The fuel injection camshaft phase detector feeds back the rotary speed information of the camshaft simultaneously.
7. diesel engine high-pressure co-rail system according to claim 6, it is characterised in that：The profile for sentencing cylinder positioning tooth
For：On the basis of original wheel tooth outline, the groove with high-pressure pump camshaft diameter parallel is further set on the gear teeth.
8. the diesel engine high-pressure co-rail system according to any one of claim 1~7, it is characterised in that：The oil spout
Device is screw thread pressing type fuel injector；The screw thread pressing type fuel injector includes：Fuel injector shell, the screw thread pressing type fuel injector
On be provided with alignment pin；External thread sleeve is socketed with the middle part of the fuel injector shell；Between the external thread sleeve and the fuel injector shell
Gap coordinate, the two ends of the external thread sleeve respectively by the shaft shoulder being arranged in the middle part of the fuel injector shell, and with the fuel injector
The fixing nut of outer casing screw connection is spacing, and the external thread sleeve possesses the free degree around fuel injector housing axis revolution；
The bottom of the external thread sleeve is provided with external screw thread, and the screw thread set on the fuel injector shell is reverse with the external screw thread；It is described outer
The outer wall of swivel nut is provided with the dogging shoulder or draw-in groove being adapted with spanner bayonet socket profile.
9. diesel engine high-pressure co-rail system according to claim 8, it is characterised in that：Perpendicular to the fuel injector enclosure axis
The sectional view of line, the dogging shoulder or draw-in groove is the one kind in regular polygon.
10. diesel engine high-pressure co-rail system according to claim 9, it is characterised in that：The screw thread pressing type fuel injector
It is provided with oil inlet and oil return opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621348381.3U CN206234034U (en) | 2016-12-09 | 2016-12-09 | A kind of diesel engine high-pressure co-rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621348381.3U CN206234034U (en) | 2016-12-09 | 2016-12-09 | A kind of diesel engine high-pressure co-rail system |
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| Publication Number | Publication Date |
|---|---|
| CN206234034U true CN206234034U (en) | 2017-06-09 |
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ID=58978132
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|---|---|---|---|
| CN201621348381.3U Expired - Fee Related CN206234034U (en) | 2016-12-09 | 2016-12-09 | A kind of diesel engine high-pressure co-rail system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523226A (en) * | 2016-12-09 | 2017-03-22 | 上海扬发动力有限公司 | Diesel engine high-pressure common rail system |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523226A (en) * | 2016-12-09 | 2017-03-22 | 上海扬发动力有限公司 | Diesel engine high-pressure common rail system |
| CN106523226B (en) * | 2016-12-09 | 2020-02-21 | 上海扬发动力有限公司 | High-pressure common rail system of diesel engine |
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