CN101280725B - Side combustion type rotor internal combustion engine - Google Patents
Side combustion type rotor internal combustion engine Download PDFInfo
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- CN101280725B CN101280725B CN2008100280045A CN200810028004A CN101280725B CN 101280725 B CN101280725 B CN 101280725B CN 2008100280045 A CN2008100280045 A CN 2008100280045A CN 200810028004 A CN200810028004 A CN 200810028004A CN 101280725 B CN101280725 B CN 101280725B
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Abstract
The invention particularly relates to a side fired type rotary internal-combustion engine, which comprises an engine body, a blast/timing drive gear assembly, a rear-end cover assembly, a rotor wheel set, a power output shaft, an outer cooling fan, a rear inner cooling fan and an air exhaust pipe which is integrated with an exhaust gas atomizer as a whole. The front end of the engine body is connected with the blast/timing drive gear assembly while the rear end of the engine body is connected with the rear-end cover assembly; the rotor wheel set is concentrically fixed at the middle part of the power output shaft and both ends of the power output shaft are connected on the bearing seats of the blast/timing drive gear assembly and the rear-end cover assembly by bearings; the outer cooling fan is fixedly connected at the front end of the power output shaft and the rear inner cooling fan is positioned in the rear-end cover assembly and fixedly connected at the rear part of the power output shaft; the air exhaust pipe is connected on the air exhaust hole of the engine body. By adopting the technical proposal of the invention, simple structure, high utilization rate of thermal efficiency, wide fuel applicability and simple production and strong practicability can be realized.
Description
Technical field:
The present invention relates to a kind of internal-combustion engine that is applicable to flexible mechanicals such as automobile, boats and ships, generator set, specifically a kind of side combustion type rotor internal combustion engine.
Background technique:
Internal-combustion engine technology of the prior art roughly has quartastroke engine, rotary internal combustion engine, several types of gas turbine.Wherein, quartastroke engine complicated in mechanical structure; The rotary internal combustion engine moment of torsion is less, and output power is not high; The rotor of gas turbine is difficult to cooling because of its structure characteristic, thereby rotor material is had very high high temperature resistant, high strength requirement, and the miniaturization practicality is difficulty comparatively.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, heat imitate utilization ratio height, fuel tolerance wide, be convenient to make, practical new side combustion type rotor internal combustion engine.
For achieving the above object, technological scheme provided by the invention is: a kind of side combustion type rotor internal combustion engine, include body, air-supply/timing assembly of drive gear, rear end cover assembly, rotor wheels and pto, outward cool off cooling fan in fan, the back, with the outlet pipe of tail gas atomizer consubstantiality, the front end of body is connected with air-supply/timing assembly of drive gear, and the rear end of body connects the rear end cover assembly; The rotor wheels are fixed in the stage casing of pto with one heart, and the two ends of pto are connected on the bearing support of air-supply/timing assembly of drive gear and rear end cover assembly with bearing; Outer cooling fan is fixedly connected on the front end of pto, and the interior cooling fan in back places in the rear end cover assembly and is fixedly connected on the pto back segment; Outlet pipe is connected on the exhaust port of body.
Be arranged with four tangent with it firing chambers and corresponding four exhaust ports on the circular main body main body of body, the body body front end connects air-supply/timing assembly of drive gear, and the body body rear connects the rear end cover assembly.
Impeller in the rotor wheels, impeller and recoil impeller are fixed on the pto stage casing with one heart, have impeller air inlet duct and symmetrically arranged four impeller air distribution holes and four groups of acting blades on the impeller; The recoil impeller is provided with recoil impeller air inlet duct and symmetrically arranged four cooling ventilation ducts and four groups of recoil blades; Impeller is arranged with four groups of flabellums and impeller cooling ventilation duct on it between impeller and recoil impeller; Cooling duct on impeller air inlet duct and impeller cooling duct and the recoil impeller communicates.
The leading portion of pto has and is used for fixing the keyway that connects the speedup/timing actuation gear in the air-supply/timing drive assembly; The back segment of pto is provided with the flange plate of cooling fan in the fixedly connected back.
Air-supply/timing assembly of drive gear includes three planet idle wheels, speedup/timing actuation gear, three accessory drive gears, three attached tooth output shafts, three speedup idle wheels, speedup fan gear, fans and leads tubular axis, blowing fan, end cap, wherein, drive it with the speedup ring gear of the concentric speedup of fixedlying connected of pto/timing actuation gear and be fixed on three speedup idle wheels on air-supply/timing driving mechanism inner walls, drive the speedup fan gear then; One end is fixedlyed connected with blowing fan with the other end that the concentric fan of fixedlying connected of speedup fan gear is led tubular axis, the axle outside of leading tubular axis at fan is equipped with duplex bearing, and fan is led the tubular axis location and installation on the bearing support that air-supply/timing driving mechanism inner walls is provided with; Simultaneously, the timing external gear of speedup/timing actuation gear drives three planet idle wheels on the end cap, then drive three accessory drive gears, three attached tooth output shafts, the annex high pressure oil pump, the high pressure that drive internal-combustion engine respectively by three attached tooth output shafts divide oily controller and phase place inductor; End cap is provided with bearing and bearing support, is used for spacing and the carrying pto.
The rear end cover housing of rear end cover assembly is provided with bearing and bearing support, be used for spacing and the carrying pto, cooling fan is fixedly installed on the flange plate of pto and places in its housing in the back, is embedded with wind scooper between rear end cover housing and body main body.
Basic functional principle of the present invention is: when four air distribution holes on the rotor wheels impeller go to four firing chamber corresponding positions of the tangent setting of internal-combustion engine circular main body (the initial rotor angle is made as zero), by air-supply/timing driving mechanism the pressure air of generation is delivered to and carried out ventilation (distribution) in four firing chambers through the impeller air inlet duct in impeller the place ahead, four air distribution holes; When the rotor wheels went to impeller blade group and the overlapping several angle in firing chamber, the oil sprayer of fuel system began to spray into atomizing flammable (steaming) gas to the firing chamber, is spark ignitor by igniting promptly after the air mixing in atomize flammable (steaming) gas and the firing chamber; The gas that detonation is expanded is the blade of high speed impact impeller vertically, and, flow to the blade of recoil impeller again through impeller through the middle impeller of blade impact, make impeller, impeller and recoil impeller obtain moment of torsion, axially rotate thereby drive the rotor wheels, finish the conversion of heat energy to mechanical energy; The tail gas of burning is directed at four exhaust ports offering on the internal combustion (IC) engine airframe main body by the recoil impeller blade and discharges outside the internal combustion engine body, and as the hot heat supply source that atomizes of liquid fuel.When rotor wheels rotation 90 was spent, the air distribution hole on the impeller went to again and the firing chamber corresponding position, promptly finishes a ventilation (distribution) again, and circular work is gone round and begun again then.
The present invention has following advantage after adopting technique scheme: 1, lateral burning type internal-combustion engine of the present invention makes combustion rotor possess the function of ventilation distribution, exhaust, rotor cooling and the conversion of hot kinetic energy with the mechanical structure of uniqueness; 2, the firing chamber with the tangent setting of circular main body can make rotor obtain maximum driving torque.3, the consubstantiality of wind pushing mechanism and timing driving mechanism design has reduced parts quantity, has simplified lubrication system, has improved mechanical property.4, the hot atomization combustion technology of utilization liquid fuel can make this internal-combustion engine use pluralities of fuels such as combustible gas, alcohol, gasoline, diesel oil, kerosene; 5 utilize heat atomizing flammable (steaming) gas explosion combustion acting.
Description of drawings:
Fig. 1 is the side combustion type rotor internal combustion engine outline drawing;
Fig. 2 is side combustion type rotor internal combustion engine rotor wheels and pto structural drawing;
Fig. 2-1 is an impeller plan view among Fig. 2; Fig. 2-2 is an impeller plan view among Fig. 2;
Fig. 2-3 is an impeller rear view among Fig. 2; Fig. 2-4 is a recoil impeller plan view among Fig. 2;
Fig. 2-5 is a recoil impeller rear view among Fig. 2;
Fig. 3 is side combustion type rotor internal combustion engine housing construction figure;
Fig. 3-1 is the right elevation of Fig. 3; Fig. 3-2 is the C-C sectional view of Fig. 3;
Fig. 3-3 is the D-D sectional view of Fig. 3;
Fig. 4 is side combustion type rotor internal combustion engine air-supply/timing driver composition;
Fig. 4-1 is that the A-A sectional view of Fig. 4: Fig. 4-2 is the F-F sectional view of Fig. 4;
Fig. 4-3 is the C-C sectional view of Fig. 4;
Fig. 5 is a side combustion type rotor internal combustion engine rear end cover assembly structure chart;
Fig. 5-1 is the right elevation of Fig. 5; Fig. 5-2 is the A-A sectional view of Fig. 5;
Fig. 6 is side combustion type rotor internal combustion engine body and rotor erection drawing;
Fig. 6-1 is the right elevation of Fig. 6; Fig. 6-2 is the A-A sectional view of Fig. 6.
Embodiment:
1-is shown in Figure 6 referring to accompanying drawing, the side combustion type rotor internal combustion engine of preferred embodiment of the present invention is mainly by internal combustion (IC) engine airframe, combustion rotor wheels and pto, air-supply/timing driving mechanism, rear end cover, and fuel system, ignition system, distribution, exhaust, cooling system, distribution, fuel feeding (combustible gas), ignition timing system, several parts of lubrication system constitute:
1, internal combustion (IC) engine airframe (shown in Fig. 1, Fig. 3, Fig. 3-1, Fig. 3-2, Fig. 3-3): the carrying main body that is each parts of internal-combustion engine.Mainly form by body main body 1-1, firing chamber 1-2, exhaust port 1-6.That body 1-1 is provided with is tangent with circular main body, be symmetrically distributed four firing chamber 1-2 and corresponding four exhaust port 1-6.The front end of body main body 1-1 connects air-supply/timing assembly of drive gear 3, and the rear end connects rear end cover assembly 4.
2, combustion rotor wheels and pto (referring to shown in Figure 2): mainly form by impeller 2-1-1, impeller 2-2-1 and recoil impeller 2-3-1 and power output main shaft 2-4.Be arranged with four impeller air distribution holes and four groups of acting blades on impeller 2-1-1 circumference, the air distribution hole that impeller 2-1-1 the place ahead is provided with communicates with preceding wind pushing mechanism, has the function (seeing shown in Fig. 2-2, Fig. 2-3) of distribution, conversion power and cooled rotor concurrently; Impeller 2-2-1 which is provided with four groups of flabellums and cooling duct between impeller 2-1-1 and recoil impeller 2-3-1, act as to strengthen the thermal power conversion efficiency and be impeller cooling (seeing shown in Fig. 2-1); Recoil impeller 2-3-1 is made up of air inlet duct, four groups of recoil blades and four cooling ducts, the air inlet duct that recoil impeller 2-3-1 is provided with communicates with cooling fan 5 air channels in the back, has the function (seeing shown in Fig. 2-4, Fig. 2-5) that strengthens power, guide waste gas and cooling recoil impeller concurrently.Impeller 2-1-1, impeller 2-2-1 and recoil impeller 2-3-1 are fixed on the pto 2-4 stage casing with one heart, and by the power output (shown in Figure 2) of pto 2-4 with impeller 2-1-1, impeller 2-2-1 and recoil impeller 2-3-1 acquisition.The front and rear sections of pto 2-4 uses the bearing location and installation on the bearing support of air-supply/timing driving mechanism 3 and rear end cover 4 settings.
3, air-supply/timing driving mechanism (shown in Fig. 1, Fig. 4, Fig. 4-1, Fig. 4-2, Fig. 4-3): air-supply/timing driving mechanism 3 mainly is made up of wind pushing mechanism and timing driving mechanism and shared parts:
(1), wind pushing mechanism is mainly led tubular axis 3-8, blowing fan 3-9 and bearing etc. and is formed by speedup/timing actuation gear 3-3, three speedup planet idle wheel 3-6, speedup fan gear 3-7, fans;
(2), the timing driving mechanism mainly is made up of speedup/timing actuation gear 3-3, three planet idle wheel 3-2, three accessory drive gear 3-4, three attached tooth output shaft 3-5 and end cap 3-8 and bearing etc.
(3), shared parts: the shared parts of wind pushing mechanism and timing driving mechanism have: air-supply/timing driving mechanism housing 3-1, speedup/timing actuation gear 3-3.Speedup/timing actuation gear 3-3 is made of speedup ring gear, timing external gear and gear mass consubstantiality.
The basic connection of the wind pushing mechanism of air-supply/timing driving mechanism 3 part is: drive it with the speedup ring gear of the concentric speedup of fixedlying connected of pto 2-4/timing actuation gear 3-3 and be fixed on three speedup idle wheel 3-6 on air-supply/timing driving mechanism housing 3-1 inwall, drive speedup fan gear 3-7 then; One end is fixedlyed connected with blowing fan 3-9 with the other end that the concentric fan of fixedlying connected of speedup fan gear is led tubular axis 3-8, the axle outside of leading tubular axis 3-8 at fan is equipped with duplex bearing, and fan is led tubular axis 3-8 location and installation on the bearing support that air-supply/timing driving mechanism housing 3-1 inwall is provided with.
Being connected to substantially of the timing driving mechanism of air-supply/timing driving mechanism: drive it at the timing external gear of the speedup of fixedlying connected/timing gear 3-3 and be fixed on three planet idle wheel 3-2 on air-supply/timing assembly of drive gear 3 end cap 3-10 with pto 2-4, then drive three accessory drive gear 3-4, three attached tooth output shaft 3-5, by three attached tooth output shaft 3-5 drive high pressure oil pump 8 respectively, high pressure divides oily controller 9 and phase place inductor 7 internal combustion engine fittings (Fig. 1/shown in Figure 4).
4, rear end cover assembly (shown in Fig. 1, Fig. 5, Fig. 5-1, Fig. 5-2): rear end cover assembly 4 mainly is made up of rear end cover housing 4-1, wind scooper 4-2 and bearing and bearing support.The rear end cover housing 4-1 of rear end cover 4 is provided with bearing and bearing support, is used for spacing and carrying pto 2-4, and cooling fan 5 is fixedly installed on the flange plate 2-5 of pto 2-4 in the back, and places in its housing 4-1.Between rear end cover housing 4-1 and body main body 1-1, be embedded with wind scooper 4-2.
5, fuel system (shown in Fig. 1, Fig. 6-1, Fig. 6-2, Fig. 6-3):
(1), using under the condition of liquid fuel, oil-fired system mainly divides oil control (throttle) device 9, high-pressure pipeline, hot atomizer (tail gas atomizing and electric heating atomizing), parts such as atomizing pneumatic tube (with the electrothermal atomizer consubstantiality), gas valve and oil sprayer to form by low pressure transport pipe, oil transfer pump, high pressure oil pump 8, high pressure.
Liquid fuel enters the exhaust gas heat atomizer, electrothermal atomizer carries out the heating power atomizing divide oily controller (dividing oil phase position time point by the control of speedup/timing actuation gear) through high-pressure service pump, high pressure after, enter oil sprayer 1-3 through the combustion steam valve again and go into firing chamber 1-2 burning.
(2), under the condition of using gases fuel, combustible gas directly inserts high pressure and divides oily controller, through high-pressure pipeline, the combustion steam valve go into oil sprayer.
The effect of fuel system is the requirement according to internal-combustion engine output power, in time, optimally supplies flammable (steaming) gas of atomizing to the firing chamber.
6, ignition system (shown in Fig. 1, Fig. 6-2):
Mainly constitute by internal-combustion engine phase place inductor 7, electronic switching circuit, high voltage wire bag, high voltage wire and spark plug.By the rotor phase signal that the phase place inductor obtains, the control electronic switching circuit produces high-tension electricity, feeds to flammable (steaming) gas among spark plug 1-4, the ignition combustion chamber 1-2.Its effect is according to engines combustible (steaming) gas firing time point, in time indoor flammable (steaming) gas of ignition combustion.
7, distribution, exhaust, cooling system (shown in Fig. 1, Fig. 2, Fig. 2-1, Fig. 2-2, Fig. 2-3, Fig. 2-4, Fig. 2-5):
Mainly by cooling fan 5 in impeller 2-1-1, impeller 2-2-1, recoil impeller 2-3-1 and air-supply/timing driving mechanism, the back, cool off fan 6 outward and form.
(1), gas distribution system is that pressure air that air-supply/timing driving mechanism 3 is produced is through impeller 2-1-1 air inlet duct, again by symmetrical four air distribution holes (seeing shown in Fig. 2-1-2) of offering on impeller 2-1-1 circumference, deliver to four firing chamber 1-2 respectively, promptly finish the distribution process;
(2), vent systems is that tail gas with work by combustion is behind impeller 2-1-1, impeller 2-2-1, go up the exhaust port 1-6 on the tail gas Guiding machine phosphor bodies 1-1 that four groups of recoil blades (seeing shown in the accompanying drawing 2-3-2) of being provided with cross high speed flow by recoil impeller 2-3-1, discharge internal-combustion engine through outlet pipe.
(3) cooling system is made up of internal cooling system and outer cooling system two parts:
Internal cooling system is that the air inlet duct by impeller 2-1-1, air distribution hole are the firing chamber 1-2 distribution of ventilating on the one hand with the pressure air that produces by air-supply/timing driving mechanism 3, in the ventilation distribution process that through impeller 2-1-1 is the firing chamber, be the impeller cooling simultaneously, be again the part of cooling mechanism, on impeller 2-1-1, have the ventilation flue that communicates with impeller 3-2-1 cooling duct; Cooling fan produces the pressure cooling air down by the coaxial drive of pto 2-4 back segment in the back, and cooling air is passed through recoil impeller air inlet duct discharge through relief opening 1-6, for recoil impeller 2-3-1 cooling, on recoil impeller 2-3-1, have the ventilation flue that communicates with impeller 2-2-1; Impeller 2-1-1 communicates with impeller 2-2-1, the set cooling ventilation duct (seeing shown in Fig. 2-2) of impeller 2-3-1 that recoils, the flow through internal cooling channel of impeller 2-1-1, impeller 2-2-1 and recoil impeller 2-3-1 of the pressure air that air-supply/timing assembly of drive gear 3 is produced is discharged to relief opening 1-6, in order to strengthen the air cooling effect of rotor;
Outer cooling system is that the wind-force of its generation is used for the engine housing cooling by outer cooling fan 6 of the coaxial installation of pto 2-4 front end.
8, distribution, fuel feeding (combustible gas), ignition timing system (shown in Fig. 1, Fig. 2, Fig. 4-1):
The timing driving mechanism of air-supply/timing driving mechanism 3 (seeing shown in Figure 4) promptly is the timing system of IC engine gas distribution, fuel feeding (combustible gas), igniting.Its basic principle is: be benchmark with the rotor angle, determine the angle with the concentric speedup/timing gear of fixedlying connected of pto 2-4; Ratio with 1 to 1 is set the timing external gear of speedup/timing actuation gear 3-3 and the diameter of accessory drive gear 3-4, make the corner timing of the attached tooth output shaft 3-5 of accessory drive gear 3-4 drive reflect that the angle of rotor changes, phase place inductor 7 and high pressure divide oily controller 9 to control in time to firing chamber flammable (steaming) gas of supply with to flammable (steaming) gas and to light a fire according to the needs of combustion in IC engine time point under attached tooth output shaft 3-5 drives.
9, lubrication system (referring to Fig. 2, shown in Figure 4):
The lubrication system of side combustion type rotor internal combustion engine is mainly led tubular axis duplex bearing lubricating point and air-supply/timing driving mechanism housing 3-1 and oil sealing by the forward and backward bearing lubrication point of pto 2-4, fan and is formed.Each bearing lubrication point is provided with oiling and chews, and adopts yellow dry oil lubrication; In sending/timing driving mechanism housing top is provided with oil hole, the bottom is provided with purge cock, be connected in outrigger shaft and joint inside and outside on housing 3-1, the end cap 3-8 each with oil sealing sealing, adopt machine oil with the gear adhesion, swash the mode of spattering each rotary parts in the air-supply/timing driving mechanism housing be lubricated.
Claims (3)
1. side combustion type rotor internal combustion engine, include body (1), air-supply/timing assembly of drive gear (3), rear end cover assembly (4), rotor wheels (2-1,2-2) and pto (2-4), outward cool off cooling fan (5) in fan (6), the back, with the outlet pipe (1-5) of tail gas atomizer consubstantiality, the front end of body (1) is connected with air-supply/timing assembly of drive gear (3), and the rear end of body (1) connects rear end cover assembly (4); Rotor wheels (2-1,2-2) are fixed in the stage casing of pto (2-4) with one heart, and the two ends of pto (2-4) are connected on the bearing support of air-supply/timing assembly of drive gear (3) and rear end cover assembly (4) with bearing; Outer cooling fan (6) is fixedly connected on the front end of pto (2-4), and the interior cooling fan (5) in back places in the rear end cover assembly (4) and is fixedly connected on pto (2-4) back segment; Outlet pipe (1-5) is connected on the exhaust port (1-6) of body (1), it is characterized in that: rotor wheels (2-1,2-2) comprise impeller (2-1-1), impeller (2-2-1) and recoil impeller (2-3-1), have impeller air inlet duct and symmetrically arranged four impeller air distribution holes and four groups of acting blades (2-1-2) on the impeller (2-1-1); Recoil impeller (2-3-1) is provided with recoil impeller air inlet duct and symmetrically arranged four cooling ventilation ducts and four groups of recoil blades (2-3-2); Impeller (2-2-1) is positioned between impeller (2-1-1) and the recoil impeller (2-3-1), is arranged with four groups of flabellums and impeller cooling ventilation duct (2-2-1) on it; Cooling duct on impeller air inlet duct and impeller cooling duct and the recoil impeller communicates.
2. a kind of side combustion type rotor internal combustion engine according to claim 1 is characterized in that: be arranged with four tangent with it firing chambers (1-2) and corresponding four exhaust ports (1-6) on the circular main body main body (1-1) of body (1).
3. a kind of side combustion type rotor internal combustion engine according to claim 1, it is characterized in that: air-supply/timing assembly of drive gear (3) includes three planet idle wheels (3-2), speedup/timing actuation gear (3-3), three accessory drive gears (3-4), three attached tooth output shafts (3-5), three speedup idle wheels (3-6), speedup fan gear (3-7), fan is led tubular axis (3-8), blowing fan (3-9), end cap (3-10), wherein, drive its axle with the speedup ring gear of the concentric speedup of fixedlying connected of pto (2-4)/timing actuation gear (3-3) and be fixed on three speedup idle wheels (3-6) on air-supply/timing driving mechanism housing (3-1) inwall, drive speedup fan gear (3-7) then; One end is fixedlyed connected with blowing fan (3-9) with the other end that the concentric fan of fixedlying connected of speedup fan gear (3-7) is led tubular axis (3-8), the axle outside of leading tubular axis (3-8) at fan is equipped with duplex bearing, and fan is led tubular axis (3-8) location and installation on the bearing support that air-supply/timing driving mechanism housing (3-1) inwall is provided with; Simultaneously, the timing external gear of speedup/timing actuation gear (3-3) drives three the planet idle wheels (3-2) on the end cap (3-10), then drive three accessory drive gears (3-4), three attached tooth output shafts (3-5), the annex high pressure oil pump (8), the high pressure that are driven internal-combustion engine by three attached tooth output shafts (3-5) respectively divide oily controller (9) and phase place inductor (7); End cap (3-10) is provided with bearing and bearing support, is used for spacing and carrying pto (2-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100280045A CN101280725B (en) | 2008-05-13 | 2008-05-13 | Side combustion type rotor internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100280045A CN101280725B (en) | 2008-05-13 | 2008-05-13 | Side combustion type rotor internal combustion engine |
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| CN101280725A CN101280725A (en) | 2008-10-08 |
| CN101280725B true CN101280725B (en) | 2010-09-08 |
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| CN2008100280045A Expired - Fee Related CN101280725B (en) | 2008-05-13 | 2008-05-13 | Side combustion type rotor internal combustion engine |
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| CN (1) | CN101280725B (en) |
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Effective date of registration: 20101103 Address after: 528200, Nanhai District, Foshan City, Xiqiao province Guangdong civilization Road No. 3, Nanhai District, Foshan city science and Technology Co., Ltd. Patentee after: Chen Lijun Address before: 528200, Nanhai District, Foshan City, Xiqiao province Guangdong civilization Road No. 3, Nanhai District, Foshan city science and Technology Co., Ltd. Patentee before: Foshan Nanhai District Cytech Co., Ltd. |
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