CN103790666A - High-performance low-emission diesel engine - Google Patents
High-performance low-emission diesel engine Download PDFInfo
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- CN103790666A CN103790666A CN201410066736.9A CN201410066736A CN103790666A CN 103790666 A CN103790666 A CN 103790666A CN 201410066736 A CN201410066736 A CN 201410066736A CN 103790666 A CN103790666 A CN 103790666A
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Abstract
The invention relates to a high-performance low-emission diesel engine. The high-performance low-emission diesel engine comprises a crankcase ventilation system, a cylinder cover, an air inlet and preheating system, a fuel system, a cylinder body, a lower box, a water pump and cooling system, a piston, a connecting rod, a crank, an oil pump, a lubricating system, an air exhaust and pressurization system, a belt, a gear train, a fuel injection system, a tail gas treatment system, a valve system and a timing transmission system. According to the technical scheme, the diesel engine is high in performance and low in emission.
Description
Technical field
The invention belongs to engine art, refer to diesel engine field, refer to especially a kind of diesel engine that can meet state V emission standard.
Background technique
Along with the worsening shortages of world energy sources, the reinforcement day by day of environmental consciousness, the requirement of the utilization ratio of automobile industry to the energy and environmental protection is 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 is because its higher thermal efficiency and good Economy, is the major impetus of medium-sized or above truck always.The diesel engine of and above truck medium-sized from current coupling, 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's 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;
Integrated camshaft holder on described cylinder cap, cylinder cover water jacket adopts double-layer water jacket, and layering is cooling to reach the cooling effect of expection; On described cylinder cap, rhombus has been arranged 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 a side that is furnished with camshaft holder, and a lubricant oil part for cylinder cap top is through these two spill ports, by corresponding spill port with it on cylinder body, gets back to oil sump; Another part is lubricated the chain that is positioned at motor rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel chamber, 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 bridge formations; 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 and driven two intake valves or exhaust valve simultaneously by a valve.
The integrated mounting point of fuel pump on described cylinder body; Described cylinder body Front-end Design is fluted, forms oil leab with the shell combination that is arranged on cylinder body front end.
On described piston, be provided with interior oil cooling passage, enter and piston is carried out after interior oil cooling passage coolingly from the lubricant oil of piston nozzle, guarantee 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, has effectively improved the intensity of connecting rod; Connecting rod small end adopts wedge-shaped structure, so that the stressed larger side in key seat hole on piston can increase thickness, guarantees the intensity of piston in the time of work.
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, the air that enters intake manifold is heated, and 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.
In the time that Decompression valves is not opened, enter machine oil cooler and oil filter from oil pump lubricant oil out, carry out respectively cooling and smart filter, then be divided into three parts after entering the main oil gallery of cylinder body;
First portion carries out cooling to piston by piston cooling nozzle, lubricant oil is got back to oil sump afterwards;
Second portion is lubricated crankshaft journal by the inclined oil hole of air of main bearing seat, and lubricant oil is got back to the oil end afterwards;
Part III, through being arranged in the housing of motor head and the oil leab that cylinder body front-end face forms, enters the auxiliary main oil gallery of cylinder body opposite side.
The described lubricant oil that enters Part III is divided into two-part again;
I part is lubricated pressurized machine, air compressor parts by the oil inlet pipe being connected on main oil gallery, and lubricated rear lubricant oil is got back to oil sump by return tube again;
II part is by arranging the vertical oil duct on cylinder body, and the vertical oil duct on corresponding cylinder cap with it, enters the main oil gallery of cylinder cap.
Described lubricated oil content four tunnels that enter cylinder cap are lubricated other component;
(1) part is lubricated the vacuum pump that is arranged on cylinder cap front end through cylinder cap main oil gallery;
(2) part is lubricated camshaft bearing journal by the oilhole being connected with cylinder cap main oil gallery of processing on cylinder cap;
(3) part, by other oilholes that are connected with cylinder cap main oil gallery of processing on cylinder cap, after rocker arm bracket, pitman arm shaft, is lubricated the friction pair on rocking arm successively;
(4) part provides hydraulic oil through the oil duct being integrated on sprocket wheel chamber, rear end to being arranged in chain tensioning device on sprocket wheel chamber, is convenient to stretcher chain is carried out to tensioning.
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 (crankcase ventilation system is not installed);
Fig. 5 is motor rear view (for rear-end plate is installed);
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 by the following examples technological scheme of the present invention in detail, following embodiment is only exemplary, only can be used for explaining and technological scheme of the present invention being described, and can not to be interpreted as is 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, and the integrated fixed structure of engine control wire harness on cylinder cap guard shield, simplifies amount of parts.
Integrated camshaft holder on described cylinder cap 2, cylinder cover water jacket adopts double-layer water jacket, and layering is cooling to reach the cooling effect of expection, and on cylinder cap, rhombus has been arranged four valves, and oil sprayer is arranged between two parties on cylinder cap.At air valve seat ring, aperture is installed and has processed eccentric chamfer, air-flow is played to leading role.Be furnished with two spill ports in a side that is furnished with camshaft holder, a lubricant oil part for cylinder cap top is through these two spill ports, by corresponding spill port with it on cylinder body 4, gets back to oil sump; Another part is lubricated the chain that is positioned at motor rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel chamber, 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 bridge formations.Every two intake rockers, two exhaust rocker arms are arranged on cylinder cap by a rocker arm bracket, and each enters (row) gas rocking arm and is built bridge and driven two to enter (row) valve simultaneously by a valve.
Described cylinder body 4 adopts divides formula cylinder body equally, the integrated mounting point of fuel pump on cylinder body; Cylinder body Front-end Design is fluted, forms oil leab with the shell combination that is 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 cylinder body 4 belows, forms the main body of motor with cylinder body 4, for motor provides the position that bent axle and other peripheral components are installed.
On described piston 6, be designed with interior oil cooling passage, enter and piston is carried out after interior oil cooling passage coolingly from the lubricant oil of piston nozzle, guarantee the reliably working of piston; Be designed with ω shape firing chamber at piston head, mix with air in firing chamber from the fuel oil that is arranged in the oil sprayer oil nozzle on cylinder cap 2, and burning.
Described connecting rod 7 cross sections adopt I-shaped structure, have effectively improved the intensity of connecting rod; The employing disconnected technology that rises, connecting rod shank and connnecting rod big end have saved positioning device; Connecting rod small end adopts wedge-shaped structure, so that the stressed larger side in key seat hole on piston can increase thickness, guarantees the intensity of piston in the time of work.
Described bent axle 8 adopts four balance block structures, guaranteeing bent axle rigidity, improving under dynamically balanced prerequisite, reduces as far as possible the weight of bent axle; Crankshaft front end is designed with driving machine oil pump structure, and rear end is designed with the fixing flange of flywheel, in flange inner side, the crankshaft gear for driving idle gear is installed, and flywheel mounting flange is connected by key with crankshaft gear 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 transmission.Timing driving system 9 is made up of crankshaft gear, idle gear, gear of fuel pump or air compressor actuation gear, the drive sprocket, the camshaft sprocket etc. that are fixed on idle gear.The drive path of whole transmission system is crankshaft gear---> idle gear---> gear of fuel pump (air compressor actuation 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, the air that enters intake manifold is heated, and 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 oil nozzle by oil sprayer is 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 being 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, water outlet, machine oil cooler, water pipe and be integrated in the cooling line in other component.Water pump is arranged on the housing that is arranged in motor head, enter cylinder body by a water pump cooling water part out, enter lower floor's water jacket of cylinder cap by being arranged in the upper water hole of end face on cylinder body, carry out cylinder head top water jacket after cooling to cylinder cap fire power face, after water outlet, enter radiator; Another part enters machine oil cooler by cooling line and machine oil is carried out cooling, returns before water pump.
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 in the time that Decompression valves is not opened, enter machine oil cooler and oil filter, carry out respectively cooling and smart filter, after entering again the main oil gallery of cylinder body, be divided into three parts, the 1. part carry out cooling by piston cooling nozzle to piston, lubricant oil is got back to oil sump afterwards, the 2. part by the inclined oil hole of air of main bearing seat, crankshaft journal is lubricated, lubricant oil is got back to oil sump afterwards, the 3. part through being arranged in the housing of motor head and the oil leab that cylinder body front-end face forms, enter the auxiliary main oil gallery of cylinder body opposite side, 3. parts of lubricating oil be divided into again two-part, I part is lubricated the parts such as pressurized machine, air compressor by the oil inlet pipe being connected on main oil gallery, after lubricated, lubricant oil is got back to oil sump by return tube again, II part is by arranging the vertical oil duct on cylinder body, and the vertical oil duct on corresponding cylinder cap with it, enter the main oil gallery of cylinder cap, lubricated oil content four tunnels that enter cylinder cap are lubricated other component, the (1) part through cylinder cap main oil gallery, the vacuum pump that is arranged on cylinder cap front end is lubricated, the (2) part by the oilhole being connected with cylinder cap main oil gallery of processing on cylinder cap, camshaft bearing journal is lubricated, the (3) part by other oilholes that are connected with cylinder cap main oil gallery of processing on cylinder cap, pass through successively rocker arm bracket, after pitman arm shaft, friction pair on rocking arm is lubricated, the (4) part provide hydraulic oil through the oil duct being integrated on sprocket wheel chamber, rear end to being arranged in chain tensioning device on sprocket wheel chamber, be convenient to stretcher chain is carried out to tensioning.On cylinder cap the (1), (2), (3) the lubricant oil of part to the friction lubricating on vacuum pump, cam journal and rocking arm after, inflow is positioned at the rocker arm chamber of cylinder cap top, wherein a part is by being arranged in cylinder cap air inlet side, being positioned at the cylinder cap back oil road below camshaft holder, and be correspondingly with it arranged in the back oil road on cylinder body, get back to oil sump, another part is lubricated the chain that is positioned at motor rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel chamber, finally gets back to oil sump.
Described belt and train 14 are made up of belt wheel of belt, idle pulley, stretcher and other annexes etc.Whole train is by the shock-proof crank pulley that is arranged on crankshaft front end, and by the belt wheel of other annexes of belt drives, belt adopts automatic tensioner tensioning.Part annex is arranged on motor by some supports, between annex and support, accurately locate by mounting limit face or set pin sleeve etc. between support and motor, the median plane of each belt pulley is alignd as much as possible, to guarantee 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 drives gas compressor rotation, and the fresh air that enters gas compressor is compressed, and waste gas enters exhaust elbow after turbo machine, then enters after-treatment system.
Described after-treatment system (not shown), by DOC(Diesel Oxidation Catalyst diesel oxidation catalyst) and SCR(Selective Catalystic Reduction selective catalytic reduction) system two-part form.From exhaust elbow waste gas out, after after-treatment system, the content of various effulents must reach after a threshold value requirement that could 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, by spray urea in effulent, forms ammonia after hydrolysis of urea, the NO in ammonia and effulent
xreaction generates harmless N
2and H
2o.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present invention is by claims and be equal to and limit.
Claims (10)
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;
Integrated camshaft holder on described cylinder cap, cylinder cover water jacket adopts double-layer water jacket, and layering is cooling to reach the cooling effect of expection; On described cylinder cap, rhombus has been arranged 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 a side that is furnished with camshaft holder, and a lubricant oil part for cylinder cap top is through these two spill ports, by corresponding spill port with it on cylinder body, gets back to oil sump; Another part is lubricated the chain that is positioned at motor rear end by the oil return guide structure on cylinder cap rear end, sprocket wheel chamber, finally gets back to oil sump.
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 bridge formations; 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 and driven two intake valves or exhaust valve simultaneously by a valve.
3. high-performance low-emission diesel according to claim 1, is characterized in that: the integrated mounting point of fuel pump on described cylinder body; Described cylinder body Front-end Design is fluted, forms oil leab with the shell combination that is arranged on cylinder body front end.
4. high-performance low-emission diesel according to claim 1, is characterized in that: on described piston, be provided with interior oil cooling passage, enter and piston is carried out after interior oil cooling passage coolingly from the lubricant oil of piston nozzle, guarantee the reliably working of piston; Describedly be set to ω shape firing chamber at 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, has effectively improved the intensity of connecting rod; Connecting rod small end adopts wedge-shaped structure, so that the stressed larger side in key seat hole on piston can increase thickness, guarantees the intensity of piston in the time of work.
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, the air that enters intake manifold is heated, and is convenient to the cold start-up of motor.
7. high-performance low-emission diesel according to claim 1, is characterized in that: 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.
8. high-performance low-emission diesel according to claim 7, it is characterized in that: from oil pump lubricant oil out in the time that Decompression valves is not opened, enter machine oil cooler and oil filter, carry out respectively cooling and smart filter, then be divided into three parts after entering the main oil gallery of cylinder body;
First portion carries out cooling to piston by piston cooling nozzle, lubricant oil is got back to oil sump afterwards;
Second portion is lubricated crankshaft journal by the inclined oil hole of air of main bearing seat, and lubricant oil is got back to the oil end afterwards;
Part III, through being arranged in the housing of motor head and the oil leab that cylinder body front-end face forms, enters the auxiliary main oil gallery of cylinder body opposite side.
9. high-performance low-emission diesel according to claim 8, is characterized in that: described in enter Part III lubricant oil be divided into again two-part;
I part is lubricated pressurized machine, air compressor parts by the oil inlet pipe being connected on main oil gallery, and lubricated rear lubricant oil is got back to oil sump by return tube again;
II part is by arranging the vertical oil duct on cylinder body, and the vertical oil duct on corresponding cylinder cap with it, enters the main oil gallery of cylinder cap.
10. high-performance low-emission diesel according to claim 9, is characterized in that: described in enter cylinder cap lubricated oil content four tunnels other component are lubricated;
(1) part is lubricated the vacuum pump that is arranged on cylinder cap front end through cylinder cap main oil gallery;
(2) part is lubricated camshaft bearing journal by the oilhole being connected with cylinder cap main oil gallery of processing on cylinder cap;
(3) part, by other oilholes that are connected with cylinder cap main oil gallery of processing on cylinder cap, after rocker arm bracket, pitman arm shaft, is lubricated the friction pair on rocking arm successively;
(4) part provides hydraulic oil through the oil duct being integrated on sprocket wheel chamber, rear end to being arranged in chain tensioning device on sprocket wheel chamber, is convenient to stretcher chain is carried out to tensioning.
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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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| CN105927313A (en) * | 2015-02-27 | 2016-09-07 | 铃木株式会社 | Internal combustion engine |
| CN107559063A (en) * | 2017-10-11 | 2018-01-09 | 芜湖钻石航空发动机有限公司 | A kind of engine lubrication system, engine |
| CN108266283A (en) * | 2018-02-01 | 2018-07-10 | 成都桐林铸造实业有限公司 | A kind of boosting type engine cylinder body and automobile engine |
| CN109209628A (en) * | 2018-09-26 | 2019-01-15 | 河北华北柴油机有限责任公司 | A kind of diesel engine that height reduces |
| CN109505703A (en) * | 2018-12-28 | 2019-03-22 | 潍柴动力股份有限公司 | A kind of engine |
| CN109826691A (en) * | 2017-11-23 | 2019-05-31 | 北汽福田汽车股份有限公司 | Crankcase ventilation system and vehicle |
| CN114961918A (en) * | 2022-03-09 | 2022-08-30 | 重庆隆鑫发动机有限公司 | Engine lubricating system and engine |
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| CN107559063A (en) * | 2017-10-11 | 2018-01-09 | 芜湖钻石航空发动机有限公司 | A kind of engine lubrication system, 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 |
| CN109826691A (en) * | 2017-11-23 | 2019-05-31 | 北汽福田汽车股份有限公司 | Crankcase ventilation system and vehicle |
| 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 |
| CN108266283A (en) * | 2018-02-01 | 2018-07-10 | 成都桐林铸造实业有限公司 | A kind of boosting type engine cylinder body and automobile engine |
| 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 |
| CN109209628A (en) * | 2018-09-26 | 2019-01-15 | 河北华北柴油机有限责任公司 | A kind of diesel engine that height reduces |
| 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 |
| CN109505703A (en) * | 2018-12-28 | 2019-03-22 | 潍柴动力股份有限公司 | A kind of engine |
| CN109505703B (en) * | 2018-12-28 | 2023-09-19 | 潍柴动力股份有限公司 | Engine |
| CN114961918A (en) * | 2022-03-09 | 2022-08-30 | 重庆隆鑫发动机有限公司 | Engine lubricating system and 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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