CN109883718A - Single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine - Google Patents
Single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine Download PDFInfo
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- CN109883718A CN109883718A CN201910253285.2A CN201910253285A CN109883718A CN 109883718 A CN109883718 A CN 109883718A CN 201910253285 A CN201910253285 A CN 201910253285A CN 109883718 A CN109883718 A CN 109883718A
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Abstract
Multiple cylinders of multi-cylinder diesel engine are divided into a test cylinder (jar) by the single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine that the invention discloses a kind of, remaining is dragging cylinder；Test macro includes: to convey air for test cylinder (jar), and to the test cylinder (jar) air system that the pressure, temperature and component of air are controlled；The test cylinder (jar) fuel system of high pressure fuel is provided for test cylinder (jar)；The diesel engine control system that the parameter and distributive value be related to test cylinder (jar) injection process is controlled；Air is conveyed for dragging cylinder and the dragging cylinder air system and dragging cylinder fuel system of high pressure fuel are provided；Acquire the data collection system of relevant parameter in test cylinder (jar) operational process；For measuring the dynamometer system of multi-cylinder diesel engine output power.The present invention can flexibly control the relevant parameter that Combustion boundary conditions and injection process are related to, not tested person environmental restrictions, relative to Special experimental single cylinder engine, be able to solve the limitation of cost, market, improve efficiency of research and development, reduce research cost.
Description
Technical field
The present invention relates to diesel combustion technology, in particular to a kind of single cylinder based on integrated cylinder cover multi-cylinder diesel engine
Integrated cylinder cover multi-cylinder diesel engine (number of cylinders is greater than 2) is transformed into test cylinder (jar), dragging by diesel engine bench test macro
Cylinder and the diesel engine test rack deposited carry out the research of diesel engine in-cylinder combustion in test cylinder (jar).
Background technique
In worldwide, the energy-consuming of emerging economy continues rapid growth, and the energy of OECD country disappears
Expense amplification is also much higher than average level.The increase at full speed of global auto recoverable amount, so that oil demand amount is significantly increased, with stone
Oily resource and yield decline to form great contradiction, and the problem of energy crisis in global range becomes increasingly conspicuous.Car ownership
Rapid growth other than bringing energy shortage problem, exhaust contaminant returns atmospheric environment and urban environment bring it is huge
Pollute destruction.By taking diesel engine as an example, the discharge product of diesel engine be mainly carbon monoxide (CO), hydrocarbon (HC),
Sulfide, particulate matter (PM) and nitrogen oxides (NOx) etc., wherein especially based on NOx and PM.These noxious emissions are to big compression ring
The harm in border is mainly manifested in form photochemical fog, acid rain, keep Ozone depletion, ozone concentration excessively high and cause global model
The greenhouse effects enclosed.
Under the multiple pressure of the energy, environment and (noble metal) resource, realizes that the high-efficiency cleaning burning of diesel engine becomes and grind
Study carefully focus.A large number of experiments studies have shown that in combustion process of the internal-combustion engine the generation of main noxious emission product require to meet it is specific
Boundary condition, i.e., specific mixture strength and combustion reference temperature.As long as mixture strength, burning temperature in reasonable master cylinder
The conditions such as degree and pressure, avoid the formation zone of NOx and soot, it is possible to realize that high-efficiency cleaning burns.Therefore, for bavin
The research of oil machine in-cylinder combustion is necessary.
Relative to finished product Multi-Cylinder Diesel Engine, single cylinder engine is capable of the boundary condition of freedom and flexibility change diesel combustion, is realized different
The tissue of combustion strategies is more advantageous to the research work realized and carry out clean and effective combustion strategies.But since special experiment is single
The limitation of cylinder machine purposes, dosage causes Geng great diesel engine manufacturer that can't be produced specific to single cylinder diesel, if adopted
With customized single cylinder engine, experimental cost substantial increase will lead to.Meanwhile finished product multi-cylinder diesel engine body group integration is more next at present
More optimize, for separate cylinder lid diesel engine, the integrated cylinder that is combined based on inlet and outlet road and cylinder head
Lid diesel engine carries out single cylinder experimental machine retrofit work, and difficulty has apparent increase.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, provide a kind of based on integrated cylinder cover multi-cylinder diesel engine
Single cylinder diesel engine bench test system, can not only realize the flexible control of cylinder of diesel engine fuel boundary condition, while energy
It is enough farthest to reduce research cost.
The technical scheme adopted by the invention is that: a kind of one-cylinder diesel board based on integrated cylinder cover multi-cylinder diesel engine
Frame test macro, including multi-cylinder diesel engine, the cylinder head form of the multi-cylinder diesel engine are monoblock type, the multi-cylinder diesel engine packet
More than two cylinders are included, one of them described cylinder is test cylinder (jar), remaining described cylinder is dragging cylinder；
Further include:
Test cylinder (jar) air system conveys air for the test cylinder (jar), and pressure, temperature to the air for entering the test cylinder (jar)
Degree and component are controlled；
Test cylinder (jar) fuel system provides high pressure fuel for the test cylinder (jar)；
Diesel engine control system is connected with the test cylinder (jar) fuel system, the parameter and oil spout being related to injection process
Amount is controlled；
Cylinder air system is dragged, conveys air for the dragging cylinder；
Cylinder fuel system is dragged, is connected with the former control system of multi-cylinder diesel engine, provides high compression ignition for the dragging cylinder
Oil, and distributive value is controlled by the former control system；
Data collection system, acquire the emission parameters in the in-cylinder pressure and exhaust in the test cylinder (jar) operational process with
And pressure involved in breathing action, temperature parameter；
Dynamometer system, the output axis connection with the multi-cylinder diesel engine, for measuring the output of the multi-cylinder diesel engine
Power.
Further, the test cylinder (jar) air system includes external source air compressor, the external source air compressor connection
Bypass is connected in the connecting pipeline of the air inlet of air inlet vacuum tank, the external source air compressor and the air inlet vacuum tank
Valve；The gas outlet of the air inlet vacuum tank is sequentially connected inlet air flow meter, cooling drying machine and temperature and adjusts heat exchanger, the temperature
The gas outlet that degree adjusts heat exchanger is connected to the air inlet of the test cylinder (jar), the exhaust outlet connection exhaust pressure stabilizing of the test cylinder (jar)
One gas outlet of tank, the exhaust vacuum tank connects exhaust pipe, is provided with counterbalance valve, the exhaust pressure stabilizing on the exhaust pipe
Another gas outlet of tank connects exhaust gas recirculation circuit, and the end of the exhaust gas recirculation circuit is connected to the temperature and adjusts
The air inlet of heat exchanger.
Wherein, the exhaust gas recirculation circuit includes cold in sequentially connected exhaust gas recirculation (egr) valve and exhaust gas recycling
Device, the air inlet of the exhaust gas recirculation (egr) valve are connect with another gas outlet of the exhaust vacuum tank, and the exhaust gas follows again
The gas outlet of ring intercooler is connect with the air inlet that the temperature adjusts heat exchanger.
Further, the test cylinder (jar) fuel system and test cylinder (jar) air system are independently from the dragging cylinder fuel system
With dragging cylinder air system.
Further, the test cylinder (jar) fuel system includes sequentially connected fuel tank, oil transfer pump, diesel fuel filter, oil mass
Metering valve, high-pressure oil pump, common rail pipe and electric-controlled fuel injector；The high-pressure oil pump is driven by oil pump driving motor；The common rail pipe
One end be provided with common rail pressure sensor, the other end is provided with relief valve and is connected to the oil return opening of the fuel tank；The electricity
The arrangement of nozzles of fuel injector is controlled in the test cylinder (jar)；The fuel gauging valve, common rail pressure sensor and electric-controlled fuel injector are equal
It is connect with the diesel engine control system.
Further, the dragging cylinder air system includes former multi-cylinder diesel engine air system, and, in the dragging cylinder
Air intake filter is arranged in turbocharger air compressor front end；The dragging cylinder fuel system is former multi-cylinder diesel engine fuel system.
Further, inlet manifold and inlet manifold are integrated and inlet manifold is independently of the integrated cylinders
The cylinder head form of lid: the air inlet of each dragging cylinder is connected to original by the former inlet manifold of the dragging cylinder air system
Inlet manifold, exhaust outlet are connected to former exhaust main by the former exhaust manifold of the dragging cylinder air system；The test
The air inlet of cylinder connect by the gas outlet that the temperature of individual air inlet pipeline and the test cylinder (jar) air system adjusts heat exchanger,
Exhaust outlet is connect by individual gas exhaust piping with the air inlet of the exhaust vacuum tank of the test cylinder (jar) air system.
Further, inlet manifold and the integrated cylinder cover are integrated and inlet manifold directly and institute
It states the connected cylinder head form of integrated cylinder cover: the Primordial Qi road that the integrated cylinder covers is divided into mutually independent examination
Test cylinder air flue and dragging cylinder air flue；The outlet end of the test cylinder (jar) air flue is connected with the air inlet of the test cylinder (jar), the examination
The arrival end for testing cylinder air flue is connect with the gas outlet that the temperature of the test cylinder (jar) air system adjusts heat exchanger, the test cylinder (jar)
Exhaust outlet is connect by individual gas exhaust piping with the air inlet of the exhaust vacuum tank of the test cylinder (jar) air system；The dragging
Cylinder air flue is connected with the air inlet of each dragging cylinder, the arrival end of the dragging cylinder air flue and dragging cylinder air system
The former inlet manifold of system connects, and the exhaust outlet of the dragging cylinder is connected by the former exhaust manifold of the dragging cylinder air system
To former exhaust main.
Further, the data collection system includes: the cylinder pressure sensor for measuring the test cylinder (jar) in-cylinder pressure,
For measuring the inlet pressure sensor and inlet temperature sensor of the test cylinder (jar) inlet condition, for measuring the test cylinder (jar)
The outlet pressure sensor and outlet temperature sensor of exhaust parameter, for measuring the fuel consumption of the test cylinder (jar) fuel system
The fuel consumption meter of rate, for measuring the emission parameters of the test cylinder (jar) air system and the engine exhaust inspection of ER EGR Rate
Survey device；The cylinder pressure sensor is arranged on the test cylinder (jar)；The inlet pressure sensor and inlet temperature sensor are set
It sets on the air inlet pipeline of the test cylinder (jar)；The outlet pressure sensor and outlet temperature sensor are arranged in the test cylinder (jar)
Gas exhaust piping on；The fuel consumption meter is arranged on the oil outlet of the fuel tank of the test cylinder (jar) fuel system, the fuel consumption meter
Import connects the fuel tank, oil transfer pump, the oil return opening of the outlet connection test cylinder (jar) fuel system pass through oil return of oil injector respectively
Pipeline connects electric-controlled fuel injector oil return opening and the high-pressure oil pump oil return of the test cylinder (jar) fuel system with high-pressure oil pump oil return line
Mouthful；The engine exhaust detection device is arranged on the sampling line of the test cylinder (jar) air system exhaust pipe.
The beneficial effects of the present invention are:
(1) heretofore described a kind of single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine
System, compared to multi-cylinder diesel engine engine bench test system, can flexibly control Combustion boundary conditions (intake air temperature, admission pressure with
And air-intake component) and the relevant parameter that is related to of injection process, while having the advantages that not tested person environmental restrictions.
(2) heretofore described single cylinder diesel engine bench test system is to be transformed to obtain based on multi-cylinder finished diesel fuel machine
, relative to Special experimental single cylinder engine, it is able to solve the limitation of cost, market, efficiency of research and development is improved, reduces research cost.
(3) heretofore described test cylinder (jar) air system can pass through the by-passing valve of adjusting air inlet side, exhaust gas recycling
The flexible control of admission pressure, temperature and air-intake component may be implemented in the counterbalance valve of valve and exhaust side.
(4) heretofore described test cylinder (jar) fuel system can be realized the spray of test cylinder (jar) by corresponding control system
The parameters such as oily moment, injection pressure and oil spout number are adjusted flexibly；
(5) heretofore described a kind of single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine
System can be tested under Different Work Condition of Engine, be tested, and can be used for the development phase of the advanced combustion technology of diesel engine.
Detailed description of the invention
Fig. 1 is the single cylinder diesel engine bench test system of the present invention based on integrated cylinder cover multi-cylinder diesel engine
Structural schematic diagram；
Fig. 2 is the structural schematic diagram of dragging cylinder air system and test cylinder (jar) air system of the present invention；
Fig. 3 is the structural schematic diagram of test cylinder (jar) fuel system of the present invention；
Fig. 4 a is the transformation schematic diagram that the first cylinder head form is directed in the present invention；
Fig. 4 b is the transformation schematic diagram that second of cylinder head form is directed in the present invention；
Attached drawing mark: 1, test cylinder (jar)；2, cylinder is dragged；3, by-passing valve；4, air inlet vacuum tank；5, inlet air flow meter；6, cooling
Drying machine；7, temperature adjusts heat exchanger；8, inlet pressure sensor；9, inlet temperature sensor；10, outlet pressure sensor；
11, outlet temperature sensor；12, it is vented vacuum tank；13, counterbalance valve；14, exhaust pipe；15, exhaust gas recirculation (egr) valve；16, exhaust gas
Recycle intercooler；17, turbocharger；18, intercooler；19, diesel engine control system；20, high-pressure oil pump；21, altogether
Rail pipe；22, electric-controlled fuel injector；23, cylinder pressure sensor；24, fuel tank；25, oil transfer pump；26, fuel gauging valve；27, diesel oil filtering
Device；28, common rail pressure sensor；29, relief valve；30, oil injector oil return pipeline；31, fuel consumption meter；32, high-pressure oil pump oil return pipe
Road；33, fuel tank oil outlet pipe.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
Shown in b as shown in Figure 1 to Figure 4, a kind of single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine
Integrated cylinder cover multi-cylinder diesel engine (number of cylinders is greater than 2) is transformed into test cylinder (jar) 1, dragging cylinder 2 and the diesel engine deposited by system
Testboard bay can flexibly control the relevant parameter that Combustion boundary conditions and injection process are related to.Including multi-cylinder diesel engine, dragging
Cylinder air system, test cylinder (jar) air system, dragging cylinder fuel system, test cylinder (jar) fuel system, diesel engine control system 19, measurement of power
Machine system, data collection system.The test cylinder (jar) air system, test cylinder (jar) fuel system are the major parts in the present invention, specially
Door is that 1 experimental study of test cylinder (jar) is individually arranged；The dragging cylinder air system, dragging cylinder fuel system mainly maintain multiple cylinder diesel
The layout design of machine script；Transformation for the integrated cylinder cover of multi-cylinder diesel engine, in the present invention for two kinds of different gas
The multi-cylinder diesel engine of cylinder cap form is introduced；The diesel engine control system 19, dynamometer system, data collection system need
It is individually arranged for experiment demand, engine parameter etc..
The integrated cylinder cover, which refers to, is integrated whole cylinder head casting of multi-cylinder diesel engine, i.e. the gas of test cylinder (jar) 1
The cylinder head of cylinder cap and dragging cylinder 2 is an entirety.Fig. 4 a and Fig. 4 b are respectively for two kinds of common integrated cylinder cover shapes
The transformation map of formula.
The first cylinder head form is inlet manifold and inlet manifold is integrated and inlet manifold is independently of integrated cylinder
Lid, for exhaust side as the arrangement form of air inlet side, this cylinder head form is the most universal in finished product engine.To inlet and outlet
Manifold carries out processing transformation, as shown in fig. 4 a, by taking a cylinder is test cylinder (jar) 1 as an example, retains original machine 2-6 cylinder (dragging cylinder 2)
Inlet and outlet structure, that is, the air inlet of each dragging cylinder 2 is connected to by the former inlet manifold of the dragging cylinder air system
Former inlet manifold, exhaust outlet are connected to former exhaust main by the former exhaust manifold of the dragging cylinder air system, to former 1 cylinder
Inlet and outlet manifold cut and carry out solder up processing, and individually arrange test cylinder (jar) 1 inlet and outlet pipeline,
That is, the air inlet of the test cylinder (jar) 1 adjusts heat exchanger 7 by the temperature of individual air inlet pipeline and the test cylinder (jar) air system
Gas outlet connection, the exhaust outlet air inlet for being vented vacuum tank 12 that passes through individual gas exhaust piping and the test cylinder (jar) air system
Mouth connection, and the connection type of the inlet and outlet pipeline of the test cylinder (jar) 1 and cylinder head can use original machine intake and exhaust manifold and gas
The connection type of cylinder cap.
Second of cylinder head form is to integrate inlet manifold part described in the first cylinder head form and cylinder head
Be integrated, inlet manifold is directly connected with cylinder head, fresh air from inlet manifold be directly entered the air flue inside cylinder head into
Enter each piston chamber, this cylinder head form has already appeared in engine product more newly developed, the transformation work of air system
Work is more complicated compared to the first, and cylinder head is generally all cast by high-quality gray cast iron or alloy cast iron and air cylinder head structure is answered
It is miscellaneous, be generally machined with Valve seat hole thereon, valve guide hole, mounting hole of oil sprayer, be also cast with water jacket, oil leab and
A part of combustion chamber or combustion chamber.So the retrofit work for cylinder head is relative complex, but this cylinder head form
Air intake duct is typically located at outermost, and allows at a distance from processing with arranging that surrounding water channel, oil leab exist, general gas
The structure of the lower part casting of cylinder cap is relatively easy, can carry out cutting to air flue from cylinder head lower part and test cylinder (jar) 1 and drag
Soldering is carried out at dynamic 2 combustion chamber charge of cylinder, is two rooms (test cylinder (jar) air flue and dragging cylinder air flue) by airway segmentation, such as Fig. 4 b
Shown, the outlet end of the test cylinder (jar) air flue is connected with the air inlet of the test cylinder (jar) 1, the arrival end of the test cylinder (jar) air flue
The gas outlet for adjusting heat exchanger 7 with the temperature of the test cylinder (jar) air system is connect, and the exhaust outlet of the test cylinder (jar) 1 passes through independent
Gas exhaust piping connect with the air inlet of the exhaust vacuum tank 12 of the test cylinder (jar) air system；The dragging cylinder air flue and each
The dragging cylinder 2 is connected, and the arrival end of the dragging cylinder air flue is connect with the former inlet manifold of the dragging cylinder air system,
The exhaust outlet of the dragging cylinder 2 is connected to former exhaust main by the former exhaust manifold of the dragging cylinder air system.In this way,
The gas of external feed stream general pipeline can only enter the combustion chamber of dragging cylinder 2 by cylinder-head port.It needs on the outside of cylinder head simultaneously
Suitable position carries out the mounting means of test cylinder (jar) air flue got through and consider test cylinder (jar) 1 air inlet pipe and cylinder head, to cylinder head
Complete processing.
As shown in Fig. 2, the dragging cylinder air system and the test cylinder (jar) air system, main function are dragged for diesel engine
Dynamic cylinder 2 and the conveying of test cylinder (jar) 1 cleaning, dry, sufficient and stable air, avoid impurity and large dust particle in air from entering bavin
Diesel engine inordinate wear is caused in oil machine combustion chamber, while considering the economy and dynamic property of engine, and finished product starts at present
Machine mostly uses turbocharging to improve air input of engine by air.For the purpose of experimental study, admission pressure, intake air temperature and air inlet
Influence of the flexible control of component (ER EGR Rate) for research inlet condition for in-cylinder combustion is very necessary, in synthesis
The reasons why stating proposes dragging cylinder air system and test cylinder (jar) air system shown in Fig. 2.
The dragging cylinder air system is to continue to use former multi-cylinder diesel engine air system, is not related to changing for integrated cylinder cover
It makes.The intake method of finished diesel fuel machine can be divided into natural aspiration and super charge at present.General car all uses nature to inhale
This mode of gas, later in order to increase diesel engine power and efficiency, just there is super charge, current super charge mode is main
There are engine driven supercharging and two kinds of turbocharging.No matter which kind of intake method is used, and dragging cylinder air system and original machine air system are protected
It holds unanimously, not changes.In the present embodiment, it is pressurized using turbocharger 17.
As shown in Fig. 2, the dragging cylinder air system is that the dragging cylinder 2 conveys air.The dragging cylinder air system
The intake method of original machine is kept not to be altered.But in inlet end (the 17 compressor front end of turbocharger of the dragging cylinder 2)
It needs to arrange air intake filter, keeps the cleaning of fresh air, avoid damage of the particulate matter to dragging cylinder 2；If original machine air inlet
Mode is turbo charge system, needs to arrange intercooler 18 in the inlet end of dragging cylinder 2, after reducing pressurization
High temperature air temperature, the thermic load to reduce engine, improve air inflow, and then increase engine power.
The test cylinder (jar) air system is part more crucial in the present invention.The main function of gas handling system is for diesel oil
It is machine conveying cleaning, dry, sufficient and stable air avoids impurity and large dust particle in air to meet the needs of diesel engine
Diesel engine inordinate wear is caused into burning chamber of diesel engine.Air inlet ingredient and air inlet physical parameter are in cylinder of diesel engine simultaneously
Combustion position influences also very crucial.The physical parameters such as admission pressure and temperature are by air inlet shape in former diesel engine air inlet system
The limitation of formula, pressure at expulsion and pressure charging system cannot achieve for the parameter regulation heat exchange under a certain operating condition.In addition, at present
Most diesel oil machine does not consider gas recirculation system in design in the market, so the adjusting that cannot achieve air-intake component is changed
Heat, this is a kind of limitation for carrying out relevant research.Individually the air system of arrangement test cylinder (jar) 1 is for single cylinder engine test rack
It is very important part.
As shown in Fig. 2, being based on integrated cylinder cover multi-cylinder diesel engine, the present invention proposes a kind of cloth of test cylinder (jar) air system
Scheme is set, the test cylinder (jar) air system is independently of the dragging cylinder air system, including external source air compressor, the external source
Air compressor connects the air inlet of air inlet vacuum tank 4, the connecting tube of the external source air compressor and the air inlet vacuum tank 4
By-passing valve 3 is connected on line；The gas outlet of the air inlet vacuum tank 4 is sequentially connected inlet air flow meter 5, cooling drying machine 6 and temperature
Degree adjusts heat exchanger 7, and the gas outlet that the temperature adjusts heat exchanger 7 is connected to the air inlet of the test cylinder (jar) 1, the test cylinder (jar)
1 exhaust outlet connection exhaust vacuum tank 12, a gas outlet of the exhaust vacuum tank 12 connects exhaust pipe 14, the exhaust pipe
Counterbalance valve 13 is provided on 14, another gas outlet of the exhaust vacuum tank 12 connects exhaust gas recirculation circuit, the exhaust gas
The end of recirculation circuit is connected to the air inlet that the temperature adjusts heat exchanger 7, wherein the exhaust gas recirculation circuit includes
Sequentially connected exhaust gas recirculation (egr) valve 15 and exhaust gas recycle intercooler 16, the air inlet of the exhaust gas recirculation (egr) valve 15 with
Another gas outlet connection of the exhaust vacuum tank 12, the gas outlet of the exhaust gas recycling intercooler 16 and the temperature tune
Save the air inlet connection of heat exchanger 7.The test cylinder (jar) air system can be realized 1 admission pressure of test cylinder (jar), intake air temperature and
The flexible control of air-intake component (ER EGR Rate), while admission pressure can break through the turbocharging system by exhaust energy
Higher admission pressure is realized in the limitation of system, to realize more wide in range parameter variation range, that is, when guaranteeing single cylinder work
Admission pressure and charge flow rate, air inlet pressure when meeting different engine and load can be adjusted in sufficiently wide range
The flexible control requirement of power and charge flow rate；Simultaneously, additionally it is possible to air inlet is filtered, pressure stabilizing and flow measurement.Furthermore, it is possible to
Variable valve actuator for air is installed in air system according to experiment demand, and (structure and installation method of variable valve actuator for air are shown in application number
For the patent application of CN201010241776.4), the installation of variable valve actuator for air does not influence the arrangement of air system other parts.
The air inlet side of the test cylinder (jar) 1 mainly includes external source air compressor, air inlet vacuum tank 4, air inlet by-passing valve 3, into
Air-flow meter 5, cooling drying machine 6, temperature adjust heat exchanger 7.Wherein the external source air compressor provide test cylinder (jar) 1 into
Gas, adjustable air compressor unloading pressure and on-load pressure range, make target inlet air pressure be maintained at air compressor and go out
In mouth air pressure range；Since the intake process of engine is periodically, pressure pulse to be generated in intake and exhaust pipeline,
So air inlet vacuum tank 4 chooses 500 times that volume is generally higher than displacement per cylinder, to play preferable voltage regulation result；Charge flow rate
Meter 5 is for measuring the mass flow of fresh air；The main function of cooling drying machine is to filter moisture therein in compressed air
And impurity, and cooling processing is carried out to compressed air；Temperature adjusts heat exchanger 7 and is arranged after exhaust gas recirculation circuit, can
To carry out cooling or heating treatment according to temperature of the experiment demand to engine charge.
The exhaust side of the test cylinder (jar) 1 mainly includes exhaust vacuum tank 12, exhaust gas recirculation circuit and counterbalance valve 13.Row
The effect of gas vacuum tank 12 is similar with air inlet vacuum tank 4, is vented to diesel engine test cylinder 1 and carries out steady pressure treatment, follows again for exhaust gas
Loop back path provides stable exhaust gas pressure；The one outlet of exhaust vacuum tank 12 is arranged in the initial segment of exhaust gas recirculation circuit
Place imports air inlet side before temperature adjusts heat exchanger 7 by exhaust gas recirculation (egr) valve 15, exhaust gas recycling intercooler 16,
Middle exhaust gas recirculation (egr) valve 15 is generally mechanical check valve, and the open and close of exhaust gas recirculation (egr) valve 15 can make engine exist
Whether using switching between EGR Technology, exhaust gas, which recycles 16 main function of intercooler, reduces exhaust gas temperature, realizes air inlet
The preliminary adjusting of temperature.
In the case where not using EGR Technology, counterbalance valve 13 keeps the state of standard-sized sheet, by adjusting by-passing valve 3
Aperture, to realize the adjusting of admission pressure；Using EGR Technology, synergic adjustment counterbalance valve is needed
13 with the aperture of by-passing valve 3, difference between control admission pressure, intake and exhaust pressure, thus realize 1 admission pressure of test cylinder (jar) and
The flexible control of air-intake component (ER EGR Rate).
The dragging cylinder fuel system continues to use former multi-cylinder diesel engine fuel system, and fuel system is usually by fuel pump, combustion
The composition such as oily filter, atomizer, effect be guarantee diesel engine various working conditions and under the conditions of required fuel flow.Mesh
Preceding diesel fuel system more newly developed mostly uses plagued common rail fuel feed system, and major advantage is that it can be in wide model
Interior change injection pressure and injecting time are enclosed, separately considers to realize bavin by the way that oil pressure is generated process and fuel Injection Control process
Oil machine electronic control.The dragging cylinder fuel system is connected with the former control system of multi-cylinder diesel engine, mentions for the dragging cylinder 2
For fuel oil.
As shown in figure 3, what the test cylinder (jar) fuel system was individually arranged independently of original machine fuel system, mainly by fuel tank
24, oil transfer pump 25, diesel fuel filter 27, fuel gauging valve 26, high-pressure oil pump 20, oil pump driving motor, common rail pipe 21 and electricity
The equal components composition of fuel injector 22 is controlled, is connected between them by corresponding low pressure or high-pressure oil pipe, is that test cylinder (jar) 1 provides high pressure
Fuel oil.The fuel tank 24, the fuel consumption meter 31 of the data collection system, oil transfer pump 25, diesel fuel filter 27, fuel gauging valve
26, high-pressure oil pump 20, common rail pipe 21 and electric-controlled fuel injector 22 are sequentially connected；The oil return opening of the high-pressure oil pump 20 is connected to described
The oil return opening of fuel consumption meter 31, the high-pressure oil pump 20 are driven by oil pump driving motor；One end of the common rail pipe 21 is provided with altogether
Rail pressure sensor 28, the other end are provided with relief valve 29 and are connected to the oil return opening of the fuel tank 24；The electric-controlled fuel injector
22 arrangement of nozzles is in the test cylinder (jar) 1 and the oil return opening of the electric-controlled fuel injector 22 is connected to returning for the fuel consumption meter 31
Hydraulic fluid port.The fuel oil of the fuel tank 24 enters high-pressure oil pump 20 through 25 initial compression of oil transfer pump and after the filtering of diesel fuel filter 27
In fuel gauging valve 26.Enter the amount of fuel control of 20 low pressure chamber of high-pressure oil pump by 26 pairs of fuel gauging valve to realize to oil pump
Control of the plunger to 21 fuel delivery of common rail pipe.Fuel oil into low pressure chamber is more, and plunger is also more to 21 fuel feeding of common rail pipe, rail pressure
Climbing speed is faster, and rail pressure value is also bigger, and vice versa.High pressure fuel in common rail pipe 21 passes through high-pressure oil pipe and automatically controlled spray
The intracorporal oil duct of oily device 22 communicates, and realizes the control to injection process by the rapid response solenoid valve of electric-controlled fuel injector 22.
The fuel gauging valve 26 of the diesel engine control system 19 and the high-pressure oil pump 20 of the test cylinder (jar) fuel system is total to
Rail pressure sensor 28, electric-controlled fuel injector 22 are connected.The diesel engine control system 19 is using ECU to the test cylinder (jar) fuel oil
The high-pressure oil pump 20 and electric-controlled fuel injector 22 of system are independently controlled, it can be achieved that the relevant parameter being related to for injection process
(parameters such as oil injection time, injection pressure and oil spout number of test cylinder (jar) 1) are adjusted flexibly.It, can be using autonomous according to condition
Diesel engine control system is developed, operation can also be carried out using the finished diesel fuel machine control system for having control authority, handles, sentence
Disconnected, then output order, provides the electric impulse signal of one fixed width to electric-controlled fuel injector 22 to control distributive value.
The dynamometer system is mainly used for testing the power of multi-cylinder diesel engine, and the dynamometer system is connected to described more
On the output shaft of cylinder diesel.It is broadly divided into hydraulic dynamometer, electric eddy current dynamometer, electric dynamometer.
The data collection system is mainly configured according to experiment demand, and the parameter mainly acquired includes in engine cylinder
Pressure, engine gas parameter and fuel consumption rate, various emissions (NOx, HC, CO, PM) parameter etc., can be according to experiment item
Part voluntarily configures.The data collection system is used to acquire in the in-cylinder pressure and exhaust in 1 operational process of test cylinder (jar)
Pressure involved in emission parameters and breathing action, temperature parameter, comprising: for measuring the 1 cylinder internal pressure of test cylinder (jar)
The cylinder pressure sensor 23 of power, for measuring the inlet pressure sensor 8 and inlet temperature sensor of 1 inlet condition of test cylinder (jar)
9, for measuring the outlet pressure sensor 10 and outlet temperature sensor 11 of 1 exhaust parameter of test cylinder (jar), for measuring
The fuel consumption meter 31 for stating the fuel consumption rate of test cylinder (jar) fuel system, for measuring the emission parameters of the test cylinder (jar) air system
With the engine exhaust detection device (model Horiba MEXA7100) of ER EGR Rate；The cylinder pressure sensor 23 is set
It sets on the test cylinder (jar) 1；The air inlet of the test cylinder (jar) 1 is arranged in the inlet pressure sensor 8 and inlet temperature sensor 9
On pipeline；The outlet pressure sensor 10 and outlet temperature sensor 11 are arranged on the outlet pipe of the test cylinder (jar) 1；Institute
It states fuel consumption meter 31 to be arranged on the oil outlet of the fuel tank 24,31 import of fuel consumption meter connects oil by fuel tank oil outlet pipe 33
Case 24, outlet pass through oil injector oil return pipeline 30 and high-pressure oil pump oil return pipe by piping connection oil transfer pump 25, oil return opening respectively
Road 32 connects 22 oil return opening of electric-controlled fuel injector and 20 oil return opening of high-pressure oil pump；The engine exhaust detection device setting exists
(sampling line is arranged on the exhaust pipe 14 of test cylinder (jar) 1 sampling line of the test cylinder (jar) air system exhaust pipe 14, draws examination
Test the sub-fraction exhaust in cylinder exhaust pipe 14) on.
The present invention not tested person environmental restrictions, while relative to Special experimental single cylinder engine, it is able to solve cost, the limit in market
System improves efficiency of research and development, reduces research cost.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (9)
1. a kind of single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine, including multi-cylinder diesel engine,
The cylinder head form of the multi-cylinder diesel engine is monoblock type, and the multi-cylinder diesel engine includes more than two cylinders, and feature exists
In one of them described cylinder is test cylinder (jar) (1), remaining described cylinder is dragging cylinder (2)；
Further include:
Test cylinder (jar) air system, for the test cylinder (jar) (1) convey air, and to enter the test cylinder (jar) (1) air pressure,
Temperature and component are controlled；
Test cylinder (jar) fuel system provides high pressure fuel for the test cylinder (jar) (1)；
Diesel engine control system (19) is connected with the test cylinder (jar) fuel system, the parameter and oil spout being related to injection process
Amount is controlled；
Cylinder air system is dragged, conveys air for the dragging cylinder (2)；
Cylinder fuel system is dragged, is connected with the former control system of multi-cylinder diesel engine, provides high compression ignition for the dragging cylinder (2)
Oil, and distributive value is controlled by the former control system；
Data collection system, acquire the emission parameters in the in-cylinder pressure and exhaust in the test cylinder (jar) (1) operational process with
And pressure involved in breathing action, temperature parameter；
Dynamometer system, the output axis connection with the multi-cylinder diesel engine, for measuring the output power of the multi-cylinder diesel engine.
2. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, the test cylinder (jar) air system includes external source air compressor, the external source air compressor connection air inlet is steady
The air inlet of tank (4) is pressed, is connected with by-passing valve in the external source air compressor and the connecting pipeline of the air inlet vacuum tank (4)
(3)；The gas outlet of the air inlet vacuum tank (4) is sequentially connected inlet air flow meter (5), cooling drying machine (6) and temperature adjusting and changes
Hot device (7), the gas outlet that the temperature adjusts heat exchanger (7) are connected to the air inlet of the test cylinder (jar) (1), the test cylinder (jar)
(1) gas outlet of exhaust outlet connection exhaust vacuum tank (12), exhaust vacuum tank (12) connects exhaust pipe (14), institute
It states and is provided on exhaust pipe (14) counterbalance valve (13), another gas outlet connection exhaust gas recycling of exhaust vacuum tank (12)
Circuit, the end of the exhaust gas recirculation circuit are connected to the air inlet that the temperature adjusts heat exchanger (7).
3. the single cylinder diesel engine bench test system according to claim 2 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, the exhaust gas recirculation circuit includes cold in sequentially connected exhaust gas recirculation (egr) valve (15) and exhaust gas recycling
Device (16), the air inlet of the exhaust gas recirculation (egr) valve (15) are connect with another gas outlet of exhaust vacuum tank (12),
The gas outlet of exhaust gas recycling intercooler (16) is connect with the air inlet that the temperature adjusts heat exchanger (7).
4. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, the test cylinder (jar) fuel system and test cylinder (jar) air system are independently from the dragging cylinder fuel system and dragging
Cylinder air system.
5. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, the test cylinder (jar) fuel system includes sequentially connected fuel tank (24), oil transfer pump (25), diesel fuel filter
(27), fuel gauging valve (26), high-pressure oil pump (20), common rail pipe (21) and electric-controlled fuel injector (22)；The high-pressure oil pump (20)
It is driven by oil pump driving motor；One end of the common rail pipe (21) is provided with common rail pressure sensor (28), the other end is provided with
Relief valve (29) and the oil return opening for being connected to the fuel tank (24)；The arrangement of nozzles of the electric-controlled fuel injector (22) is in the test
In cylinder (1)；The fuel gauging valve (26), common rail pressure sensor (28) and electric-controlled fuel injector (22) with the diesel engine control
System (19) connection processed.
6. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, the dragging cylinder air system includes former multi-cylinder diesel engine air system, and, in the whirlpool of dragging cylinder (2)
It takes turns booster (17) compressor front end and air intake filter is set；The dragging cylinder fuel system is former multi-cylinder diesel engine Fuel System
System.
7. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, inlet manifold and inlet manifold are integrated and inlet manifold independently of the integrated cylinder cover gas
Cylinder cap form: the air inlet of each dragging cylinder (2) by the former inlet manifold of the dragging cylinder air system be connected to it is former into
Gas general pipeline, exhaust outlet are connected to former exhaust main by the former exhaust manifold of the dragging cylinder air system；The test cylinder (jar)
(1) air inlet adjusts the gas outlet of heat exchanger (7) by the temperature of individual air inlet pipeline and the test cylinder (jar) air system
Connection, exhaust outlet are connected by the air inlet of individual gas exhaust piping and the exhaust vacuum tank (12) of the test cylinder (jar) air system
It connects.
8. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, inlet manifold and the integrated cylinder cover are integrated and inlet manifold directly with the entirety
The connected cylinder head form of formula cylinder head: the Primordial Qi road that the integrated cylinder covers is divided into mutually independent test cylinder (jar) gas
Road and dragging cylinder air flue；The outlet end of the test cylinder (jar) air flue is connected with the air inlet of the test cylinder (jar) (1), the test cylinder (jar)
The arrival end of air flue is connect with the gas outlet that the temperature of the test cylinder (jar) air system adjusts heat exchanger (7), the test cylinder (jar) (1)
Exhaust outlet connect by individual gas exhaust piping with the air inlet of the exhaust vacuum tank (12) of the test cylinder (jar) air system；Institute
It states dragging cylinder air flue to be connected with the air inlet of each dragging cylinder (2), the arrival end of the dragging cylinder air flue is dragged with described
The former inlet manifold connection of dynamic cylinder air system, the exhaust outlet of dragging cylinder (2) pass through the dragging cylinder air system
Former exhaust manifold is connected to former exhaust main.
9. the single cylinder diesel engine bench test system according to claim 1 based on integrated cylinder cover multi-cylinder diesel engine,
It is characterized in that, the data collection system includes: the cylinder pressure sensor for measuring the test cylinder (jar) (1) in-cylinder pressure
(23), it for measuring the inlet pressure sensor (8) and inlet temperature sensor (9) of the test cylinder (jar) (1) inlet condition, is used for
The outlet pressure sensor (10) and outlet temperature sensor (11) for measuring the test cylinder (jar) (1) exhaust parameter, for measuring
The fuel consumption meter (31) for stating the fuel consumption rate of test cylinder (jar) fuel system, the emission for measuring the test cylinder (jar) air system are joined
Several and ER EGR Rate engine exhaust detection device；The cylinder pressure sensor (23) is arranged on the test cylinder (jar) (1)；
The inlet pressure sensor (8) and inlet temperature sensor (9) are arranged on the air inlet pipeline of the test cylinder (jar) (1)；It is described
Outlet pressure sensor (10) and outlet temperature sensor (11) are arranged on the gas exhaust piping of the test cylinder (jar) (1)；The oil
Consumption instrument (31) is arranged on the oil outlet of fuel tank (24) of the test cylinder (jar) fuel system, the import connection of the fuel consumption meter (31)
Oil transfer pump (25), the oil return opening that the fuel tank (24), outlet connect the test cylinder (jar) fuel system pass through oil return of oil injector respectively
Pipeline (30) and high-pressure oil pump oil return line (32) connect the test cylinder (jar) fuel system electric-controlled fuel injector (22) oil return opening and
High-pressure oil pump (20) oil return opening；The engine exhaust detection device is arranged in the test cylinder (jar) air system exhaust pipe (14)
On sampling line.
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| CN201910253285.2A CN109883718A (en) | 2019-03-29 | 2019-03-29 | Single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine |
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| CN201910253285.2A CN109883718A (en) | 2019-03-29 | 2019-03-29 | Single cylinder diesel engine bench test system based on integrated cylinder cover multi-cylinder diesel engine |
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| CN114705439A (en) * | 2021-11-26 | 2022-07-05 | 东风商用车有限公司 | Thermal fatigue test bed for variable thermal load engine system |
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