CN103790666B - A kind of high-performance low-emission diesel - Google Patents
A kind of high-performance low-emission diesel Download PDFInfo
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- CN103790666B CN103790666B CN201410066736.9A CN201410066736A CN103790666B CN 103790666 B CN103790666 B CN 103790666B CN 201410066736 A CN201410066736 A CN 201410066736A CN 103790666 B CN103790666 B CN 103790666B
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Abstract
The present invention relates to a kind of high-performance low-emission diesel, include crankcase ventilation system, cylinder cap, air inlet and pre-heating system, oil-fired system, cylinder body, lower box, water pump and cooling system, piston, connecting rod, bent axle, oil pump and lubrication system, exhaust and pressurization system, belt and train, fuel injection system, exhaust treatment system, gas distribution system and timing driving system.By technological scheme of the present invention, provide the diesel engine of a high-performance, low emission.
Description
Technical field
The invention belongs to engine art, refer to diesel engine realm, refer to a kind of diesel engine that can meet state V emission standard especially.
Background technique
Along with the worsening shortages of world energy sources, the reinforcement day by day of environmental consciousness, automobile industry to the utilization ratio of the energy and the requirement of environmental protection more and more higher.As the motor of automobile important component part, the raising of its performance is the key that vehicle performance improves always.Therefore in vehicular engine field, advanced science and technology is more and more applied in the design of motor, to improve the performance of motor each side.
Diesel engine, because its higher thermal efficiency and good Economy, is the major impetus of medium-sized or above truck always.From mating diesel engine that is medium-sized and above truck at present, its performance great majority are also lower, and its comparatively severe discharge, make diesel engine can not meet the requirement of current motor.How to improve the important topic that diesel engine performance and emission level are engine research fields always.
Summary of the invention
The object of this invention is to provide a kind of high-performance, and meet the diesel engine of state V discharge.
The present invention is achieved by the following technical solutions:
A kind of high-performance low-emission diesel, includes crankcase ventilation system, cylinder cap, air inlet and pre-heating system, oil-fired system, cylinder body, lower box, water pump and cooling system, piston, connecting rod, bent axle, oil pump and lubrication system, exhaust and pressurization system, belt and train, fuel injection system, exhaust treatment system, gas distribution system and timing driving system;
Described crankcase ventilation system comprises cylinder cap guard shield, oil gas preseparating structure and deaerator; Described oil gas preseparating structure is connected on cylinder cap guard shield;
Described cylinder cap is integrated with camshaft holder, and cylinder cover water jacket adopts double-layer water jacket, and layering cooling is with the cooling effect reaching expection; On described cylinder cap, rhombus arranges four valves, and the oil sprayer of fuel injection system is arranged between two parties on cylinder cap;
The air valve seat ring of described valve is installed aperture and is set to eccentric chamfer, plays leading role for air-flow;
Described cylinder cap is furnished with two spill ports in the side being furnished with camshaft holder, and the lubricant oil part above cylinder cap, through these two spill ports, by spill port corresponding with it on cylinder body, gets back to oil sump; Another part is lubricated the chain being positioned at engine rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel room, finally gets back to oil sump.
Described gas distribution system comprises a camshaft, four intake rockers, four exhaust rocker arms, two rocker arm brackets and eight valves and builds bridge; Every two intake rockers, two exhaust rocker arms are arranged on cylinder cap by a rocker arm bracket, and each intake rocker or exhaust rocker arm are built bridge by a valve and driven two intake valves or exhaust valve simultaneously.
Described cylinder body is integrated with the mounting point of fuel pump; Described cylinder body Front-end Design is fluted, forms oil leab with the shell combination being arranged on cylinder body front end.
Described piston is provided with interior oil cooling passage, after entering interior oil cooling passage from the lubricant oil of piston nozzle, piston is cooled, ensure the reliably working of piston; Describedly be set to ω shape firing chamber at piston head.
Described connecting rod cross section adopts I-shaped structure, effectively improves the intensity of connecting rod; Connecting rod small end adopts wedge-shaped structure, so that the stressed larger side, key seat hole on piston can increase thickness, ensures piston intensity operationally.
Described air inlet and pre-heating system are arranged on the side of motor, are made up of intake elbow, intake manifold and air inlet heating device; Described air inlet heating device is grid structure, is arranged in intake manifold, by storage battery power supply, heats the air entering intake manifold, is convenient to the cold start-up of motor.
Described oil pump and lubrication system are made up of oil pump, oil sump, oil rule parts, sump strainer, oil filter and other lubricant pipes.
From oil pump lubricant oil out when Decompression valves is not opened, ingress engine oil cooler and oil filter, carry out cooling and essence filter respectively, then be divided into three parts after the main oil gallery entering cylinder body;
First portion is cooled piston by piston cooling nozzle, and oil sump got back to by lubricant oil afterwards;
Second portion is lubricated crankshaft journal by the inclined oil hole of air of main bearing seat, and the oil end got back to by lubricant oil afterwards;
The oil leab that Part III is formed through the housing and cylinder body front-end face being arranged in motor head, enters the auxiliary main oil gallery of cylinder body opposite side.
The described lubricant oil entering Part III is divided into two-part again;
Ith part is lubricated pressurized machine, air compressor parts by the oil inlet pipe be connected on main oil gallery, and after lubrication, lubricant oil gets back to oil sump by return tube again;
IIth part is by arranging the vertical oil duct on cylinder body, and the vertical oil duct on cylinder cap corresponding with it, enters the main oil gallery of cylinder cap.
Described lubrication oil content four tunnel entering cylinder cap is lubricated other component;
(1) part is lubricated the vacuum pump being arranged on cylinder cap front end through cylinder cap main oil gallery;
(2) part is lubricated camshaft bearing journal by the oilhole be connected with cylinder cap main oil gallery processed on cylinder cap;
(3) part, by other oilholes be connected with cylinder cap main oil gallery processed on cylinder cap, successively after rocker arm bracket, pitman arm shaft, is lubricated the friction pair on rocking arm;
(4) part provides hydraulic oil through the oil duct be integrated on sprocket wheel room, rear end to being arranged in chain tensioning device on sprocket wheel room, is convenient to stretcher and carries out tensioning to chain.
The invention has the beneficial effects as follows:
By technological scheme of the present invention, provide the diesel engine of a high-performance, low emission.
Accompanying drawing explanation
Fig. 1 is motor front elevation;
Fig. 2 is engine right view;
Fig. 3 is motor A-A sectional view;
Fig. 4 is motor top view (not installing crankcase ventilation system);
Fig. 5 is motor rear view (for installing rear-end plate);
Fig. 6 is motor left view;
Fig. 7 is motor rear view;
Fig. 8 is lubrication system schematic diagram;
Fig. 9 is cooling system schematic diagram.
Embodiment
Describe technological scheme of the present invention in detail by the following examples, following embodiment is only exemplary, only can be used for explaining and technological scheme of the present invention being described, and can not be interpreted as being the restriction to technical solution of the present invention.
As shown in Figures 1 to 7, motor comprises the component compositions such as crankcase ventilation system 1, cylinder cap 2, air inlet and pre-heating system 3, oil-fired system 4, cylinder body 5, lower box 6, water pump and cooling system 7, piston 8, connecting rod 9, bent axle 10, oil pump and lubrication system 11, exhaust and pressurization system 12, belt and train 13, gas distribution system 14, timing driving system 15, exhaust treatment system, and its structural type is reciprocating piston type, in-line four cylinder, four-stroke, water-cooled, cylinder diameter 93.5mm, stroke 100mm, Electrocontrolled high-pressure common rail fuel injection system.
Described crankcase ventilation system 1 comprises cylinder cap guard shield, oil gas preseparating structure, deaerator; Oil gas preseparating structure is connected on cylinder cap guard shield by modes such as friction welding, bolt connections, cylinder cap guard shield is integrated with the fixed structure of engine control wire harness, simplifies amount of parts.
Described cylinder cap 2 is integrated with camshaft holder, and cylinder cover water jacket adopts double-layer water jacket, and layering cooling is with the cooling effect reaching expection, and on cylinder cap, rhombus arranges four valves, and oil sprayer is arranged between two parties on cylinder cap.At air valve seat ring, aperture is installed and machined eccentric chamfer, leading role is played to air-flow.Be furnished with two spill ports in the side being furnished with camshaft holder, the lubricant oil part above cylinder cap, through these two spill ports, by spill port corresponding with it on cylinder body 4, gets back to oil sump; Another part is lubricated the chain being positioned at engine rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel room, finally gets back to oil sump.
Described gas distribution system 3 comprises a camshaft, four intake rockers, four exhaust rocker arms, two rocker arm brackets, eight valves are built bridge.Every two intake rockers, two exhaust rocker arms are arranged on cylinder cap by a rocker arm bracket, and each enters (row), and gas rocking arm enters (row) valve by a valve bridge formation driving two simultaneously.
Described cylinder body 4 adopts divides formula cylinder body equally, cylinder body is integrated with the mounting point of fuel pump; Cylinder body Front-end Design is fluted, forms oil leab with the shell combination being arranged on cylinder body front end; There is the mounting point of piston cooling nozzle in crankcase indoor design, have oil duct to connect the oilhole of main oil gallery and piston cooling nozzle.
Described lower box 5 is arranged on below cylinder body 4, forms the main body of motor with cylinder body 4, for motor provides the position of installing bent axle and other peripheral components.
Described piston 6 is designed with interior oil cooling passage, after entering interior oil cooling passage from the lubricant oil of piston nozzle, piston is cooled, ensure the reliably working of piston; Be designed with ω shape firing chamber at piston head, the fuel oil from the oil sprayer oil nozzle be arranged on cylinder cap 2 mixes with air in firing chamber, and burns.
Described connecting rod 7 cross section adopts I-shaped structure, effectively improves the intensity of connecting rod; Employing is risen disconnected technology, and connecting rod shank and connnecting rod big end eliminate positioning device; Connecting rod small end adopts wedge-shaped structure, so that the stressed larger side, key seat hole on piston can increase thickness, ensures piston intensity operationally.
Described bent axle 8 adopts four balance block structures, under ensureing bent axle rigidity, improving dynamically balanced prerequisite, reduces the weight of bent axle as far as possible; Crankshaft front end is designed with driving machine oil pump structure, and rear end is designed with the fixing flange of flywheel, and inside flange, be provided with the crankshaft gear for driving idle gear, flywheel mounting flange and crankshaft gear are connected by key or temperature differential method interference is fixed on bent axle.
Described timing driving system 9 is arranged in the rear end of motor, comprises two kinds of driving mode: gear transmission and Chain conveyer.Timing driving system 9 is made up of crankshaft gear, idle gear, gear of fuel pump or air compressor actuation gear, the drive sprocket be fixed on idle gear, camshaft sprocket etc.The drive path of whole transmission system---> idle gear---the > gear of fuel pump (air compressor actuation gear) that is crankshaft gear; Idle gear---> drive sprocket---> camshaft sprocket, wherein between drive sprocket and camshaft sprocket by chain drive.
Described air inlet and pre-heating system 10 are arranged on the side of motor, are made up of intake elbow, intake manifold, air inlet heating device.Air inlet heating device is grid structure, is arranged in intake manifold, by storage battery power supply, heats the air entering intake manifold, is convenient to the cold start-up of motor.
Described fuel oil supply system 11 is made up of fuel pump, high pressure oil rail, oil sprayer, fuel pipe etc., fuel pump is to high pressure oil rail pump oil, in high pressure oil rail, form high pressure, maximum pressure can reach 1800bar, then by the oil nozzle of oil sprayer to injected fuel in firing chamber.Fuel pump or directly or be arranged on cylinder body by oil pump mounting flange, the gear of fuel pump driven by idle gear drives.
As shown in Figure 9, described water pump and cooling system 12 are by water pump, water inlet bend pipe, thermostat and valve seat thereof, water outlet, machine oil cooler, water pipe and the cooling line that is integrated in other component.Water pump is arranged on and is arranged on the housing of motor head, cylinder body is entered by a water pump cooling water part out, entering lower floor's water jacket of cylinder cap by being arranged in the upper water hole of end face on cylinder body, carrying out cylinder head top water jacket to after the cooling of cylinder cap fire power face, after water outlet, entering radiator; Another part is cooled machine oil, before returning water pump by cooling line ingress engine oil cooler.
As shown in Figure 8, described oil pump and lubrication system 13 are made up of oil pump, oil sump, oil rule parts, sump strainer, oil filter and other lubricant pipes etc.Oil pump is made up of internal rotor and external rotor, is driven by crankshaft front end.From oil pump lubricant oil out when Decompression valves is not opened, ingress engine oil cooler and oil filter, carry out cooling and essence filter respectively, three parts are divided into after entering the main oil gallery of cylinder body again, the 1. part by piston cooling nozzle, piston is cooled, oil sump got back to by lubricant oil afterwards, the 2. part by the inclined oil hole of air of main bearing seat, crankshaft journal is lubricated, oil sump got back to by lubricant oil afterwards, the 3. oil leab that formed through the housing and cylinder body front-end face being arranged in motor head of part, enters the auxiliary main oil gallery of cylinder body opposite side, 3. parts of lubricating oil be divided into two-part again, Ith part is lubricated the parts such as pressurized machine, air compressor by the oil inlet pipe be connected on main oil gallery, after lubrication, lubricant oil gets back to oil sump by return tube again, IIth part is by arranging the vertical oil duct on cylinder body, and the vertical oil duct with it on corresponding cylinder cap, enter the main oil gallery of cylinder cap, lubrication oil content four tunnel entering cylinder cap is lubricated other component, the (1) part through cylinder cap main oil gallery, the vacuum pump being arranged on cylinder cap front end is lubricated, the (2) part by the oilhole be connected with cylinder cap main oil gallery processed on cylinder cap, camshaft bearing journal is lubricated, the (3) part other oilholes be connected with cylinder cap main oil gallery by processing on cylinder cap, successively through rocker arm bracket, after pitman arm shaft, friction pair on rocking arm is lubricated, the (4) part provide hydraulic oil through the oil duct be integrated on sprocket wheel room, rear end to being arranged in chain tensioning device on sprocket wheel room, be convenient to stretcher and tensioning is carried out to chain.On cylinder cap the (1), (2), the lubricant oil of (3) part is to after the friction lubricating on vacuum pump, cam journal and rocking arm, flow into the rocker arm chamber be positioned at above cylinder cap, wherein a part by being arranged in cylinder cap air inlet side, be positioned at cylinder cap back oil road below camshaft holder, and the corresponding back oil road be arranged on cylinder body with it, get back to oil sump, another part is lubricated the chain being positioned at engine rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel room, finally gets back to oil sump.
Described belt and train 14 are made up of the belt wheel etc. of belt, idle pulley, stretcher and other annexes.Whole train is by the shock-proof crank pulley being arranged on crankshaft front end, and by the belt wheel of other annexes of belt drives, belt adopts automatic tensioner tensioning.Piece attachments by some support installing on the engine, accurately located by mounting limit face or set pin sleeve etc. between annex and support, between support and motor, the median plane of each belt pulley is alignd as much as possible, to ensure belt and train energy reliably working.
Described exhaust and pressurization system 15 are made up of gas exhaust manifold, pressurized machine, exhaust elbow etc.Waste gas enters the turbo machine of pressurized machine through gas exhaust manifold, turbo machine high speed rotating, and drive gas compressor to rotate, compress the fresh air entering gas compressor, waste gas enters exhaust elbow after turbo machine, then enters after-treatment system.
Described after-treatment system (not shown), by DOC(DieselOxidationCatalyst diesel oxidation catalyst) and SCR(SelectiveCatalysticReduction selective catalytic reduction) system two-part form.From exhaust elbow waste gas out after after-treatment system, the content of various effulent must reach after a threshold value could the requirement of satisfy regulatory.This motor mainly needs to solve dissolved organic matter and nitrogen oxide.DOC is mainly made up of carrier, coating, active component etc., mainly the SOF in CO, HC, NO and particulate matter is converted into CO
2, H
2o and NO
2.SCR system, mainly through spraying urea in effulent, forms ammonia after hydrolysis of urea, the NO in ammonia and effulent
xreaction generates harmless N
2and H
2o.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (8)
1. a high-performance low-emission diesel, includes crankcase ventilation system, cylinder cap, air inlet and pre-heating system, oil-fired system, cylinder body, lower box, water pump and cooling system, piston, connecting rod, bent axle, oil pump and lubrication system, exhaust and pressurization system, belt and train, fuel injection system, exhaust treatment system, gas distribution system and timing driving system;
Described crankcase ventilation system comprises cylinder cap guard shield, oil gas preseparating structure and deaerator; Described oil gas preseparating structure is connected on cylinder cap guard shield;
Described cylinder cap is integrated with camshaft holder, and cylinder cover water jacket adopts double-layer water jacket, and layering cooling is with the cooling effect reaching expection; On described cylinder cap, rhombus arranges four valves, and the oil sprayer of fuel injection system is arranged between two parties on cylinder cap; It is characterized in that:
The air valve seat ring of described valve is installed aperture and is set to eccentric chamfer, plays leading role for air-flow;
Described cylinder cap is furnished with two spill ports in the side being furnished with camshaft holder, and the lubricant oil part above cylinder cap, through these two spill ports, by spill port corresponding with it on cylinder body, gets back to oil sump; Another part is lubricated the chain being positioned at engine rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel room, finally gets back to oil sump;
Described oil pump and lubrication system are made up of oil pump, oil sump, oil rule parts, sump strainer, oil filter and other lubricant pipes;
From oil pump lubricant oil out when Decompression valves is not opened, ingress engine oil cooler and oil filter, carry out cooling and essence filter respectively, then be divided into three parts after the main oil gallery entering cylinder body;
First portion is cooled piston by piston cooling nozzle, and oil sump got back to by lubricant oil afterwards;
Second portion is lubricated crankshaft journal by the inclined oil hole of air of main bearing seat, and the oil end got back to by lubricant oil afterwards;
The oil leab that Part III is formed through the housing and cylinder body front-end face being arranged in motor head, enters the auxiliary main oil gallery of cylinder body opposite side.
2. high-performance low-emission diesel according to claim 1, is characterized in that: described gas distribution system comprises a camshaft, four intake rockers, four exhaust rocker arms, two rocker arm brackets and eight valves and builds bridge; Every two intake rockers, two exhaust rocker arms are arranged on cylinder cap by a rocker arm bracket, and each intake rocker or exhaust rocker arm are built bridge by a valve and driven two intake valves or exhaust valve simultaneously.
3. high-performance low-emission diesel according to claim 1, is characterized in that: the mounting point described cylinder body being integrated with fuel pump; Described cylinder body Front-end Design is fluted, forms oil leab with the shell combination being arranged on cylinder body front end.
4. high-performance low-emission diesel according to claim 1, is characterized in that: described piston is provided with interior oil cooling passage, to piston cools after entering interior oil cooling passage from the lubricant oil of piston nozzle, ensures the reliably working of piston; ω shape firing chamber is set at described piston head.
5. high-performance low-emission diesel according to claim 1, is characterized in that: described connecting rod cross section adopts I-shaped structure, effectively improves the intensity of connecting rod; Connecting rod small end adopts wedge-shaped structure, so that the stressed larger side, key seat hole on piston can increase thickness, ensures piston intensity operationally.
6. high-performance low-emission diesel according to claim 1, is characterized in that: described air inlet and pre-heating system are arranged on the side of motor, is made up of intake elbow, intake manifold and air inlet heating device; Described air inlet heating device is grid structure, is arranged in intake manifold, by storage battery power supply, heats the air entering intake manifold, is convenient to the cold start-up of motor.
7. high-performance low-emission diesel according to claim 1, is characterized in that: described in enter Part III lubricant oil be divided into two-part again;
Ith part is lubricated pressurized machine, air compressor parts by the oil inlet pipe be connected on main oil gallery, and after lubrication, lubricant oil gets back to oil sump by return tube again;
IIth part is by arranging the vertical oil duct on cylinder body, and the vertical oil duct on cylinder cap corresponding with it, enters the main oil gallery of cylinder cap.
8. high-performance low-emission diesel according to claim 7, is characterized in that: described in enter cylinder cap lubrication oil content four tunnel other component are lubricated;
(1) part is lubricated the vacuum pump being arranged on cylinder cap front end through cylinder cap main oil gallery;
(2) part is lubricated camshaft bearing journal by the oilhole be connected with cylinder cap main oil gallery processed on cylinder cap;
(3) part, by other oilholes be connected with cylinder cap main oil gallery processed on cylinder cap, successively after rocker arm bracket, pitman arm shaft, is lubricated the friction pair on rocking arm;
(4) part provides hydraulic oil through the oil duct be integrated on sprocket wheel room, rear end to being arranged in chain tensioning device on sprocket wheel room, is convenient to stretcher and carries out tensioning to chain.
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| CN201410066736.9A CN103790666B (en) | 2014-02-26 | 2014-02-26 | A kind of high-performance low-emission diesel |
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| CN103790666B true CN103790666B (en) | 2016-01-20 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6428378B2 (en) * | 2015-02-27 | 2018-11-28 | スズキ株式会社 | Internal combustion engine |
| CN107559063B (en) * | 2017-10-11 | 2023-12-08 | 芜湖钻石航空发动机有限公司 | Engine lubricating system and engine |
| CN109826691B (en) * | 2017-11-23 | 2020-12-08 | 北汽福田汽车股份有限公司 | Crankcase ventilation system and vehicle |
| CN108266283B (en) * | 2018-02-01 | 2024-03-19 | 成都桐林铸造实业有限公司 | Supercharged engine cylinder body and automobile engine |
| CN109209628B (en) * | 2018-09-26 | 2021-02-26 | 河北华北柴油机有限责任公司 | Diesel engine with reduced height |
| CN109505703B (en) * | 2018-12-28 | 2023-09-19 | 潍柴动力股份有限公司 | Engine |
| CN114961918B (en) * | 2022-03-09 | 2024-07-19 | 重庆隆鑫发动机有限公司 | Engine lubricating system and engine |
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