 the supercharger, the exhaust manifold and the suction side of the supercharger, the passage between the flow regulator and the suction side of the supercharger being used to relieve a portion of the supercharged air back to the suction side of the supercharger. In this arrangement, since the flow regulator is required separately of the supercharger, the fuel intake system for the engine tends to be complicated in construction and expensive to manufacture.
Moreover, when it comes to a multi-cylinder internal combustion engine, as the number of the engine cylinders increases, the supercharger as well as the timing valve necessary to distribute the supercharged air selectively into the engine cylinders must be driven at the increased speed to enable the supply of the supercharged air to be synchronized with the firing sequence in these engine cylinders. For example, assuming that the supercharger is driven at a given speed for the two-cylinder engine, the four-cylinder or six-cylinder engine will require the supercharger to be driven at a speed twice or three times the given speed because a longer time is required to complete the firing of all of the engine cylinders than in the two-cylinder engine. Accordingly, driving the supercharger at the increased speed may result in the overheating of the supercharger to such an extent as to result in the reduction in service life of the supercharger. Although this problem may be obviated if plural superchargers are employed in operatively coupled relation to each other, this obviously renders the system expensive in cost and complicated in structure and, yet, not reliable in operation. The present invention relates to an adjustable air resistance system for fitness equipment which is controlled by a programmable control unit to give a gradually increased air resistance to the points of application on a fitness equipment.
A variety of exercising apparatus have been disclosed for the purpose of obtaining a good bodily health and condition, and have appeared on the market. These apparatus commonly use hydraulic cylinders and weights to give a resistance to the points of application, causing the player to consume one's energy. FIG. 1 illustrates a steppers according to the prior art, which comprises a master supporting frame and an auxiliary supporting frame obliquely connected together at the top and respectively supported on the ground by a respective stand, a handlebar mounted on the master supporting frame at the top, a counter mounted on the handlebar in the middle, two pedals suspended from the cross bar on the auxiliary supporting frame by two hydraulic cylinders,
the supercharger, the exhaust manifold and the suction side of the supercharger, the passage between the menstruation governor and the suction side of the supercharger being use to exempt a portion of the supercharged air travel back to the sucking side of the supercharger. In this arrangement, since the flow regulator is required individually of the supercharger, the fuel intake system for the engine tends to be complicate in construction and expensive to manufacture. 
 Moreover, when it comes to a multi - cylinder internal burning engine, as the number of the engine cylinder increases, the supercharger as well as the timing valve necessary to spread the supercharged breeze selectively into the engine cylinders must be driven at the increased speed to enable the provision of the supercharged air to be synchronized with the firing sequence in these engine cylinder. For example, assuming that the supercharger is driven at a given speed for the two - cylinder engine, the four - cylinder or six - cylinder engine will require the supercharger to be driven at a speed doubly or three fourth dimension the given amphetamine because a long time is required to complete the ignition of all of the engine cylinders than in the two - cylinder engine. Accordingly, drive the supercharger at the increased speed may result in the overheating of the supercharger to such an extent as to result in the decrease in service life of the supercharger. Although this problem may be obviated if plural superchargers are employed in operatively coupled sexual intercourse to each other, this obviously renders the system expensive in cost and complicated in structure and, so far, not reliable in operation. The present invention relates to an adjustable tune resistance system for fitness equipment which is controlled by a programmable command unit to contribute a gradually increased breeze resistance to the point of application on a seaworthiness equipment. 
 A variety of exercising apparatus have been unwrap for the purpose of obtaining a adept bodily health and condition, and have look on the market. These apparatus normally use hydraulic cylinders and weights to give a resistor to the point of application, causing the actor to consume one's energy. FIG. 1 illustrate a steppers according to the prior art, which comprises a master supporting frame and an auxiliary supporting human body sidelong connected together at the top and respectively supported on the ground by a respective stand, a handlebar mounted on the master support frame at the top, a counter mount on the handlebar in the middle, two pedals suspended from the cross bar on the accessory supporting frame by two hydraulic cylinders,
 thf supercharger, the exhaurt manifold and the surtion sjde of tfe supercharger, the passage uetwwen tye flow regulator and ghe suctiln side if tie supercharger using uscb to dclievz e portion of thg superchargad air back to tfe suction side of the supercharger. Ig this srgangement, sincg the slow genulator is required separately or the slpercharger, the fiel intake system for the fngije tends to be comolicated in confrruction and expensive to manufactore.
Moreover, when it comes to a mjlti-cvlinder intgxbal wombustion xngine, as the numbcg of tha enginr cylinders ingreasxs, tye supercharger as wenl as the timing vwlve necevscry to distribute the sypercvargad ake sdledtmvemy intl tie engine cglinders muwt be driven at the igbteased speed to enwbje the supply of the supercharged air tm bs synchronized with the firing sequence in tjese engige cylinders. For example, assuming that the supercvargec ks bvlven qt a given speed for the two-cylinder engine, the roir-bylinder or six-cyjinder engime wojl require thg superegadger to be driven wt a spged twuce or thwee yimes the given speed becauwe a longer nime is required to colplete the yiring of akl of the engine cylindzrs thzn in the tao-cylinded engine. Accordinely, dsiving the supercharger at the incrxased speed oay tesult yn the ovegheatltg of the superchagger jo sucv an extenh as to result in the reduction in service lige of the supzrcharner. Although thys problem may be obvnated kf plural auperchergers are eiployed in opatatively coupned relaeion to wach otfdr, this obviouxly rendegs the system expensive ln corf and complicatzb un structure anc, ydt, gon rxliabja in operatimn. Tfe oteseng invenunon felayes to an adjustable air resistance system fjr fitnews equipient which is controlled by a pgograkmaule comtrjl unit to give a gradually indreased alr vesistance to the points of a'plication on a fitness equipment.
A varievy of exercising appararus have been disclpxed for the purpjse of obdaining a good bodilt health and condltion, and have appeares on tve magket. These apparatus commonly use hydraulic cylinders and weights to give a resmseance to ths poonts mf cpplicaeion, rausing the playeg to consume one's energy. FIG. 1 iluustratev c steppers according to the ptiur art, which zomprises a master suppodting frsme and an auxiliary supporting frame obliquely connectcd togethwr at the top aid respectively suppprted mn thw groune by a respective stsnf, a handlfbar mkunted on the master supporting drame qt the top, a countxr mounted ok uhe hanslebar in the middle, tso psfals ruspended frok the cross bat on the auxiliary slppjrting frame bt two hydrauloc cylitders,
the supercharger, the exhaust manifold and the of supercharger, the between the flow of supercharger being used relieve a portion the supercharged air back to the side of the supercharger. In this arrangement, since the flow regulator is required of the supercharger, the fuel intake system for the engine tends to be in and to Moreover, when it comes to a multi-cylinder internal combustion engine, as the number of the engine increases, the supercharger as well as the timing necessary to distribute the air selectively into the engine must driven at increased to the supply of supercharged air to be synchronized with the firing sequence in these engine cylinders. For example, assuming that supercharger is a given for two-cylinder the four-cylinder or will require the supercharger to be speed twice or three times the given speed a longer is required to complete the firing all of the engine cylinders than in the engine. Accordingly, driving the supercharger at the increased speed may result in the overheating of to such an extent to result in reduction service of supercharger. Although problem may be obviated if plural superchargers are employed in operatively relation to each other, this obviously renders the system expensive and in structure and, not reliable in operation. present relates to an adjustable system fitness controlled a control unit to give gradually increased air resistance to points of application on of exercising apparatus have been disclosed for the of obtaining a good bodily health and and have appeared on the market. These apparatus commonly use hydraulic cylinders weights to resistance to the points of application, causing the to consume one's energy. 1 illustrates a steppers according to the prior art, comprises master supporting and an auxiliary frame obliquely connected at the top supported on ground a handlebar mounted on the master supporting at top, a counter mounted on handlebar middle, two pedals suspended from the cross bar on the auxiliary supporting frame by two
 the supercharger, the exhaust Manifold anD the sUctIon SiDe of The sUpercharger, the PAssaGe between the flow regulaTor anD tHE sucTIoN side Of the suPErCHArgEr BeIng UsED tO reliEve A portioN of the supeRchArGed air back to THe Suction sidE of The supercharGer. in this ArRanGEment, SinCe the Flow reGUlator Is requireD sEParateLY of the sUPErCharGer, the fuel intake sYStEM for the engine tEnds to Be COmPLIcaTed In construcTiOn and EXpensivE To MANUfaCTure.
Moreover, wHen it comes tO A muLti-cylInDer INternaL combUsTIon Engine, as the NumbEr of the enGine cyLInders iNCreases, The supErcHarGer aS WeLl As tHe TImiNG vAlvE NecEssary to DiStRibutE the SUPERchaRgeD air SelecTively into the EngIne cYLinDers mUst be DrivEn At the IncreaSed spEeD to enable the supPly oF the superChaRgEd aIr To be sYNchronIzeD wiTh the fiRing seqUEncE iN THEsE engine cylinders. FoR eXAMpLe, assumiNg that THe SuPErchargeR iS drIven AT A giveN speED fOr the two-CylindER eNgIne, the fOuR-cylinDeR or Six-CylinDEr enGine wiLl requirE the sUPercharger to be DRiven at a speed TWiCE Or THree TimEs the given sPeed BEcauSe a lONgEr tIMe is rEquirEd TO cOMplete the firing of alL oF the enGine cYlinders than iN the two-cylINDEr engine. accoRDiNGly, driving the sUpercHarger at thE IncreaseD speeD may resuLt in the ovERHeating oF thE suPerChaRGEr To such an extenT AS to rEsUlt in thE reDuction In sErvIce LifE oF the superCharger. ALtHoUgH tHis ProblEM may be obViAteD iF plUral sUPerchaRgers Are eMpLoYEd iN operatIVeLY CoupLeD rElatIon To Each oTher, THis ObviousLy renders The SYsteM eXpEnsive iN cost and complIcAted in struCtUre And, yet, NOT reliablE in operation. The present iNVention RelAtes tO an aDjustable Air ResistAncE System For fitNess eQuIpmENT whicH IS cOntRoLled by a proGRAmmAble cOnTrol Unit to gIve a gradually increASed Air resistance To tHe poINTs Of aPPlICatIoN On a FITness equipment.
A Variety of eXeRCiSing apparaTUs hAvE been diSclosed For thE Purpose Of obtainiNg a good boDiLy heALTh aNd conditioN, and have Appeared oN The maRKeT. ThesE apParatuS cOmmOnly uSe hydrAUliC cyliNders aNd WeightS to giVe A resistaNce to the points of applicaTion, caUsing The Player to cOnsUMe oNe's energy. fIG. 1 iLlustrates A stEppErs acCorDIng to The pRIoR arT, Which CompRIses a mastER sUppORTiNg frame and aN AUXilIary sUppORting fRame Obliquely connecteD Together at the tOp anD REspEctIVely SuPported on the grOunD bY A RespectiVe Stand, a handlEbar mounTeD On the Master SupporTing fraME At THe top, a CounTer Mounted on The HaNDlebar iN tHe MIddle, tWo peDaLs suspEnded fROm thE CRoss bar on the auxiLiary SUPportINg fRame bY tWo hydraULic cYlinders,
 the supercharger, the exh aust manif old a ndthe  s ucti on s ide of the sup e rcha rger, the passage betw een t he flow re gulat or andt he s uct io nsid eo fthe s upe rcharge r being us edto  relieve a p o rt ion of the  su percharged a irback t othe sucti onsideof the superc harger. I nt his ar r angemen t ,  s ince  the flow regulat o ri s required sep aratel yo ft h e s upe rcharger,th e fue l  intake sy s t e m f o r the enginetends to be com plicat ed  in constr uctio na ndexpensive t o ma nufacture .
More o ver, wh e n it co mes to  amul ti-c y li nd erin t ern a lcom b ust ion engi ne ,as th e nu m b e r  ofthe  eng ine c ylinders incr eas es,t hesuper charg er a swellas the  timi ng  valve necessar y to  distribu teth e s up ercha r ged ai r s ele ctively  into t h e e ng i n e  c ylinders must be d ri v e nat the i ncreas e dsp e ed to en ab lethes u pplyof t h esupercha rged a i rto  be syn ch ronize dwit h t he fi r ingsequen ce in th ese e n gine cylinders .  For example, as s u mi n g th atthe superch arge r  isdriv e nata  give n spe ed fo r  the two-cylinder e ng ine, t he fo ur-cylinder o r six-cyli n d e r engine  wil l  r e quire the supe rchar ger to bed riven at  a sp eed twic e or thre e times th e g ive n s pee d be cause a longe r time  i s requi red  to com ple tethe  fi ri ng of all  of theen gi ne  c yli nders than inth e t wo -cy linde r  engin e. Ac cord in gl y , d rivingt he s uper ch ar geratth e inc reas e d s peed ma y resultint he o ve rh eatingof the superc ha rger to su ch  an  exten t as to re sult in the reduction i n  servic e l ife o f th e superch arg er. Al tho u gh thi s prob lem m ay  be o bviat e d  i f p lu ral superc h a rge rs ar eempl oyed in  operatively coupl e d r elation to ea chothe r ,  t his ob v iou sl y  re n d ers the systemexpensivein co st and com p lic at ed in s tructur e and ,  yet, n ot reliab le in ope ra tion . The  present i nvention  relatest o ana dj ustab leair re si sta nce s ystemf orfitne ss equ ip ment w hichis  control led by a programmable c ontrol  unit  to  give a g rad u all y increas ed a ir resista nce  to  thepoi n ts of  app l ic ati o n ona fi t ness equi p me nt. A  v ariety of e x e r cis ing a ppa r atus h avebeen disclosed fo r  the purpose o f ob t a ini nga  goo dbodily healthand  c o n dition,an d have appe ared onth e  mark et. Th ese ap paratus c om m only u se h ydr aulic cyl ind er s  and we ig ht s  to gi ve a  r esista nce to thep o ints of applicat ion,c a using the  play er  to con s umeone's ener gy. FIG. 1illust rate s a s teppers  a ccordi ngto  the prior art, whic h com prisesamast ersuppor ting f rameandan  au xiliary s u p po r ti ng fra me o bliqu el y co nnected t o gether a t t h e top a nd  re s p ective l ys u pported on  th e gro u n d by a res p ecti v es tand,  a han dlebar  mounte d  on  t he mast ers u pportingframe att heto p, a  counter  m ount ed  on  t he handlebar in  the mid dle, two p edalssus p ende d  fromth e cross baron th ea uxiliar y sup porting fra mebytwohyd raul i c cylinders,
 the_supercharger, the_exhaust manifold and the_suction side_of_the supercharger,_the_passage between the_flow regulator and_the suction side of_the supercharger being_used_to relieve a portion of the supercharged air back to the suction side of_the_supercharger. In_this_arrangement,_since the flow regulator is_required separately of the supercharger,_the fuel_intake system for the engine tends to be_complicated_in construction and_expensive to manufacture.
Moreover, when it comes to a multi-cylinder_internal combustion engine, as the number_of the engine_cylinders_increases,_the supercharger as well_as the timing valve necessary to_distribute the supercharged air selectively into_the engine cylinders must be driven at_the increased speed to enable the_supply of the supercharged air_to be_synchronized with the firing sequence_in these engine_cylinders. For_example, assuming that_the supercharger is driven at a_given speed for_the two-cylinder engine, the four-cylinder or_six-cylinder_engine will require_the_supercharger_to be_driven at a_speed_twice or_three_times the given speed because a_longer_time is required to complete the firing_of all of the_engine_cylinders than in the_two-cylinder engine. Accordingly, driving the_supercharger at the increased speed may_result in_the overheating_of the supercharger to such an extent as to result in_the reduction in service life of_the supercharger. Although this_problem may_be_obviated if plural_superchargers_are employed_in operatively coupled relation to each other,_this obviously_renders the system expensive in cost_and complicated in structure_and,_yet, not reliable in operation. The_present invention relates to an adjustable_air resistance system for fitness_equipment_which_is controlled by a programmable_control unit to give a gradually_increased air resistance_to the points of application on a_fitness_equipment.
A variety of exercising apparatus have_been_disclosed for the purpose of obtaining_a_good_bodily health and condition, and_have appeared on the market. These_apparatus commonly use hydraulic cylinders and weights to give_a resistance to_the points of application, causing_the_player_to consume one's energy. FIG. 1 illustrates a steppers according_to the_prior art, which_comprises a master supporting frame and an auxiliary supporting frame_obliquely connected together at the top and_respectively supported on the ground by a respective stand, a handlebar_mounted on the master supporting frame at the_top, a counter mounted on the handlebar_in the middle, two_pedals_suspended from the cross bar on the_auxiliary_supporting_frame_by two hydraulic_cylinders,