 engine's operation around TDC and BDC.
This invention is carried out in a positive displacement piston-type device such as a internal combustion engine having at least one piston, a crankshaft with an eccentric crankpin, and a connecting rod interconnecting them. A counterweight is linked to the crankshaft and is axially slidable in a axial guideway and which includes a wagging member which wags as it reciprocates.
According to one embodiment of this invention, the counterweight itself wags.
According to yet another embodiment of the invention, a connecting link wags, and transmits axial force to the reciprocating counterweight, which counterweight does not wag. Metal forming members such as dies and the like are exposed to high cyclical pressure and high friction conditions. Recently the industry has turned to the use of advanced high strength steel alloys (AHSS) which exhibit tensile strengths far greater than those shown by previously employed steel alloys. Typical AHSS alloys manifest tensile strengths which exceed 700 MPa. In particular instances, alloys having tensile strengths in the range of 900-1200 MPa are employed in the fabrication of structural components for automobiles and the like. Owing to their high strength, AHSS steels are very difficult to form and dies used for their forming are exposed to high impact and high pressure conditions. In addition to the high impact and high pressure conditions, the surfaces of the dies experience very high frictional forces in use. These high pressure, high friction conditions can cause extreme wear to forming dies and the like, thereby greatly compromising their service life.
In some instances, the prior art has sought to harden the surfaces of the dies by various treatment processes; however, these results have produced only limited success. In other approaches, dies have been coated with various high hardness, wear resistant coatings including titanium nitride, titanium carbonitride, chromium nitride, titanium aluminum nitride, and the like. In other approaches, thermal diffusion coatings of materials such as vanadium carbide and chemical vapor deposition (CVD) coatings such as titanium carbide have been utilized. While each of these surface enhancement techniques have demonstrated success in extending the service life of dies used to form conventional alloys having strength levels below 400 MPa, they all manifest poor performance in forming operations involving AHSS alloys.
In some instances, thermal diffusion and CVD coatings have been found to extend the service life of dies used for forming AHSS alloys. However, both of these processes tend to produce changes in the dimensions of the dies
engine's operation around TDC and BDC. 
 This invention is carried out in a positive translation piston - character device such as a internal combustion locomotive having at least one piston, a crankshaft with an bizarre crankpin, and a connecting rod interconnect them. A counterweight is yoke to the crankshaft and is axially slidable in a axial guideway and which include a wagging member which wag as it reciprocates. 
 According to one embodiment of this invention, the counterweight itself wags. 
 harmonize to yet another embodiment of the invention, a connecting link wags, and convey axial force to the reciprocating counterweight, which counterweight does not wag. alloy forming members such as dies and the like are expose to high cyclical pressure and high friction condition. Recently the industry has turned to the use of advanced high lastingness steel alloys (AHSS) which exhibit tensile strengths far greater than those shown by previously employed steel alloys. distinctive AHSS alloy manifest ductile force which exceed 700 MPa. In particular instances, alloy having tensile strengths in the range of 900 - 1200 MPa are use in the fabrication of structural components for automobiles and the like. Owing to their gamey strength, AHSS steels are very difficult to form and die practice for their forming are exposed to high impact and high pressure condition. In addition to the high impact and eminent pressure conditions, the surfaces of the dies experience very gamey frictional forces in consumption. These high pressure, eminent friction condition can cause extreme clothing to forming dies and the alike, thereby greatly compromising their service life sentence. 
 In some instances, the anterior art has sought to harden the surface of the dies by various treatment processes; however, these results have produce only limited achiever. In other approaches, dies have been coated with various high hardness, tire resistant coatings including titanium nitride, titanium carbonitride, chromium nitride, titanium aluminum nitride, and the like. In other approaches, thermal dissemination coating of material such as vanadium carbide and chemical vapor deposition (CVD) coatings such as titanium carbide have been utilized. While each of these surface enhancement techniques have show success in extending the service life sentence of dies used to form conventional alloys suffer strength levels below 400 MPa, they all manifest inadequate performance in forming process involving AHSS alloys. 
 In some instances, thermal diffusion and CVD coatings have been found to unfold the service life of dies used for forming AHSS alloys. However, both of these processes tend to produce changes in the dimensions of the dies
 enhine's operation around TAC and BDC.
This nbventimn is darried uut in a positive displacemeit puston-ujpe device such as a knternal bombustiob enjine having at lxzst one pistoh, a cxaikshaft with an eccentric crankpin, and d zounecting rod interconnecting them. A sountereelght is linked to uhe crahkshaft and is axially slidable in a axian guideway anc which includes a wagging memher which wags as lt reciprocqtes.
Wxcording to une embodiment of this invention, the counterweight itrelf cags.
Accordibg to iet another xmbodiient of the lmventimn, a comnecting link eagv, abd transmits axial focce to the reciprocajing countarceight, which counterwwitht dmes tot dqg. Oetzl fkrming mejbers such as dies ane the like are expoxeq to high cycljcal pwefsure and high friction conditions. Recettlg the industry has turnwd to the use of advajced high strength steel alloys (AHSS) which exhibit tensile streigghs fwf ggeater than those shown by previously employeq sueek alloys. Typiccl AHSS alloys msnlfrft tensile sttengths whjch exceed 700 MPa. In particolar ibstances, wllous having tensile strengths in the rangv of 900-1200 MPa are employed in the fabxicatipn of structural components yor aufomobiles ajd the liid. Owing to their hinh vtrength, AHSS steels are vqry diffirult co form xnd cies ufed for thfir forming are exposed ho hiyh im[act and hlgh pressure conditions. In addivmon to the hibh imiact and kigh pvessure conditijns, the surfacgs of the dies experiencv very hijh frictionaj forces in uvg. These high 'ressure, righ frixtion cuvditions can csuse extrvmt wear to dorming dies and tme liys, thereby greatoy xompromising thrir sewvpce lyxe.
In some invtanzes, yhe pfior aru hcs soubht to harden the susfacss of the dies by favious treqtment pwocesses; howefer, these results jave 'roducxd onlu lymited success. In other approadhes, dies haye been coateq wibh vwrious higk hardness, wear resistant coatings incluving titanium nitride, jitanium carbonitride, ghromium nitcide, tytanium anuminum nitride, and rhe like. In other approaches, thermal djffusimn cowtings of materials such as vanadium carbide and chemical vapor depositiob (CVD) rowtings such as yitanpum earbide havx ueen utilized. Whike each of these surface enhancxment techtizues have demonstrated succexs in extending the service life of diea used tp form conventional alloys havimg strength levels below 400 MPa, thwy alm manifest poor performance on forking iperatiins lnvolving AHSS alkons.
In some lnstenczs, thermal diffusion and CVD coatungs hqvf been found to xxtend the scryice lpfe of qies used for fodminf AHSS alloys. Howevrr, both of thexe processes tend to pwoduce changes pn the dimensoons of the dies
engine's operation around TDC and BDC. This carried in a displacement piston-type device engine at least one a crankshaft with eccentric crankpin, and a connecting rod them. A counterweight is linked to the crankshaft and is axially slidable in axial guideway and which includes a wagging member which wags as it reciprocates. to embodiment this the counterweight itself wags. According to yet another embodiment of the invention, a connecting link wags, transmits axial force to the reciprocating counterweight, which does not wag. Metal members such as dies and like exposed to cyclical and friction conditions. Recently industry has turned to the use of advanced high strength steel alloys (AHSS) which exhibit tensile strengths greater than by previously steel Typical alloys manifest tensile exceed 700 MPa. In particular instances, strengths in the range of 900-1200 MPa are in the of structural components for automobiles and like. Owing to their high strength, AHSS steels very difficult to form and dies used for their forming are exposed to high impact pressure conditions. In addition the high impact high conditions, surfaces the dies very high frictional forces in use. These high pressure, high friction can cause extreme wear to forming dies and the like, compromising service life. In instances, the prior art sought harden the surfaces of by treatment results produced limited success. In other dies have been coated with high hardness, wear resistant carbonitride, chromium nitride, titanium aluminum nitride, and the In other approaches, thermal diffusion coatings of such as vanadium carbide and chemical vapor deposition (CVD) coatings such as carbide have While each of these surface enhancement techniques have success in extending the life of dies used to form conventional alloys having levels 400 MPa, all manifest poor in forming operations AHSS alloys. In thermal diffusion CVD have extend the service life of dies for AHSS alloys. However, both of processes produce changes in the dimensions of the dies
 engine's operation around TDC And BDC.
This InvenTioN is CaRrieD out In a positive disPLaceMent piston-type device suCh as a InTErnaL CoMbustIon engiNE hAVIng At LeAst OnE PiSton, a CraNkshaft With an ecceNtrIc Crankpin, and a COnNecting rod IntErconnecting TheM. A counTeRweIGht is LinKed to The craNKshaft And is axiaLlY SlidabLE in a axiAL GuIdewAy and which includeS A wAGging member whiCh wags As IT rECIprOcaTes.
AccordiNg To one EMbodimeNT oF THIs iNVention, the couNterweight iTSelF wags.
ACcOrdINg to yeT anotHeR EmbOdiment of thE invEntion, a coNnectiNG link waGS, and traNsmits AxiAl fOrce TO tHe RecIpROcaTInG coUNteRweight, wHiCh CountErweIGHT Does Not Wag. MEtal fOrming members SucH as dIEs aNd the Like aRe exPoSed to High cyClicaL pRessure and high fRictIon conditIonS. REceNtLy the INdustrY haS tuRned to tHe use of ADvaNcED HIgH strength steel alloYs (ahsS) Which exhIbit teNSiLe STrengths FaR grEateR THan thOse sHOwN by previOusly eMPlOyEd steel AlLoys. TyPiCal aHSs alloYS manIfest tEnsile stRengtHS which exceed 700 MPA. in particular iNStANCeS, AlloYs hAving tensilE strENgthS in tHE rAngE Of 900-1200 MPa Are emPlOYeD In the fabrication of sTrUcturaL compOnents for autoMobiles and THE Like. OwinG to tHEiR High strength, AHsS steEls are very DIfficult To forM and dies Used for thEIR forming Are ExpOseD to HIGh Impact and high PREssuRe ConditiOns. in additIon To tHe hIgh ImPact and hiGh pressuRe CoNdItIonS, the sURfaces of ThE diEs ExpErienCE very hIgh frIctiOnAl FOrcEs in use. tHeSE High PrEsSure, HigH fRictiOn coNDitIons can Cause extrEme WEar tO fOrMing dieS and the like, thErEby greatly CoMprOmisinG THeir servIce life.
In some instances, tHE prior aRt hAs souGht tO harden thE suRfaces Of tHE dies bY varioUs treAtMenT PRocesSES; hOweVeR, these resuLTS haVe proDuCed oNly limiTed success. In other aPProAches, dies have BeeN coaTED wIth VArIOus HiGH haRDNess, wear resistaNt coatings InCLuDing titaniUM niTrIde, titaNium carBonitRIde, chroMium nitriDe, titaniuM aLumiNUM niTride, and thE like. In oTher approAChes, tHErMal diFfuSion coAtIngS of maTerialS SucH as vaNadium CaRbide aNd cheMiCal vapor Deposition (CVD) coatings suCh as tiTaniuM caRbide have BeeN UtiLized. WhilE eacH of these suRfaCe eNhancEmeNT techNiquES hAve DEmonsTratED success iN ExTenDINg The service lIFE Of dIes usEd tO Form coNvenTional alloys havinG Strength levels BeloW 400 mpa, tHey ALl maNiFest poor perforManCe IN Forming oPeRations invoLving AHSs aLLoys.
IN some iNstancEs, thermAL DiFFusion And CvD cOatings haVe bEeN Found to ExTeND the seRvicE lIfe of dIes useD For fORMing AHSS alloys. HoWever, BOTh of tHEse ProceSsEs tend tO ProdUce changes In the dimensIons of The dIes
 engine's operation around  TDC and B DC.
T his  in ve ntio n is  carried out i n  a p ositive displacement p iston -t y pe d e vi ce su ch as a in t e rna lco mbu st i on  engi nehavingat least o nepi ston, a cran k sh aft with a n e ccentric cra nkp in, an da c o nnect ing  rodinterc o nnecti ng them.Ac ounter w eight i s li nked  to the crankshaf t  a n d is axially s lidabl ei na axi alguideway a nd  whic h  includ e sa w agg i ng member whi ch wags asi t r ecipro ca tes . 
Accor dingto one  embodiment  ofthis inve ntion, the cou n terweig ht its elf  wa gs.A cc or din gt o y e tano t her  embodim en tof th e in v e n t ion,  aconn ectin g link wags,and  tra n smi ts ax ial f orce  t o the  recip rocat in g counterweight , wh ich count erw ei ght  d oes n o t wag.  Me tal  formin g membe r s s uc h a sdies and the likear e ex posed to  highc yc li c al press ur e a nd h i g h fri ctio n  c ondition s. Rec e nt ly  the in du stry h as  tu rne d tot he u se ofadvanced  high strength steel alloys (AHSS) wh i c he xhib ittensile str engt h s fa r gr e at ert han t hosesh o wn by previously emplo ye d stee l all oys. TypicalAHSS alloy s m anifesttens i le strengths whic h exc eed 700 MP a . In par ticul ar insta nces, all o y s having  te nsi lestr e n gt hs in the ran g e  of90 0-1200MPa  are em plo yed  in  th efabricati on of st ru ct ur al  co mpone n ts for a ut omo bi les  andt he lik e. Ow ingto  t h eir  high s t re n g th,AH SS  ste els  a re ve ry d i ffi cult to  form and  di e s us ed  f or thei r forming are  e xposed tohi ghimpact a nd highpressure conditions. In additio n t o the  hig h impactand  highpre s sure c onditi ons,th e s u r faces o fthe  d ies experi e n ceveryhi gh f riction al forces in use.T hes e high pressu re,  hig h fr ict i on con di t ion s can cause extre me wear to  f o rm ing dies a n d t he  like,thereby  grea t ly comp romisingtheir ser vi ce l i f e.In some in stances,  the prio r  arth as  soug htto har de n t he su rfaces ofthe d ies by  v arious  trea tm ent proc esses; however, these r esults  have  pr oduced on lyl imi ted succe ss.In other a ppr oac hes,die s  have  bee n  c oat e d wit h va r ious high ha rdn e s s,  wear resis t a n t c oatin gsi ncludi ng t itanium nitride,t itanium carbon itri d e , c hro m iumni tride, titaniu m a lu m i num nitr id e, and thelike. In  o t her a pproac hes, t hermald i ff u sion c oati ngs  of mater ial ss uch asva na d ium ca rbid eand ch emical vapo r deposition (CVD)  coat i n gs su c h a s tit an ium car b idehave beenutilized. W hile e achof th ese sur fa ce enh anc em ent techni q ues havedemon strated  s ucce ssin ext endi n g  theserv ic e l ife of di e s  u s ed  t o  fo rm c onven ti onal  alloys h a ving str eng t h level sbel o w  400 M P a, t hey all ma nif est p o o r performa n ce i n  f o rming  opera tionsinvolvi n g A HS S alloy s.I n  some ins tances, t h erm al  dif fusion a nd  CVD  c oat in gs have been fo und to e xtend th e servic e l i fe o f  diesus ed for formi ng AH SS alloys. H owe ver, bo t h o f t hes e pr oce sses tend to produce changesin t he di m ens ionsof th edies
 engine's_operation around_TDC and BDC.
This invention_is carried_out_in a_positive_displacement piston-type device_such as a_internal combustion engine having_at least one_piston,_a crankshaft with an eccentric crankpin, and a connecting rod interconnecting them. A counterweight_is_linked to_the_crankshaft_and is axially slidable in_a axial guideway and which_includes a_wagging member which wags as it reciprocates.
According to_one_embodiment of this_invention, the counterweight itself wags.
According to yet another embodiment_of the invention, a connecting link_wags, and transmits_axial_force_to the reciprocating counterweight,_which counterweight does not wag. Metal_forming members such as dies and_the like are exposed to high cyclical_pressure and high friction conditions. Recently_the industry has turned to_the use_of advanced high strength steel_alloys (AHSS) which_exhibit tensile_strengths far greater_than those shown by previously employed_steel alloys. Typical_AHSS alloys manifest tensile strengths which_exceed_700 MPa. In_particular_instances,_alloys having_tensile strengths in_the_range of_900-1200_MPa are employed in the fabrication_of_structural components for automobiles and the like._Owing to their high_strength,_AHSS steels are very_difficult to form and dies_used for their forming are exposed_to high_impact and_high pressure conditions. In addition to the high impact and high_pressure conditions, the surfaces of the_dies experience very high_frictional forces_in_use. These high_pressure,_high friction_conditions can cause extreme wear to forming_dies and_the like, thereby greatly compromising their_service life.
In some instances,_the_prior art has sought to harden_the surfaces of the dies by_various treatment processes; however, these_results_have_produced only limited success. In_other approaches, dies have been coated_with various high_hardness, wear resistant coatings including titanium nitride,_titanium_carbonitride, chromium nitride, titanium aluminum nitride,_and_the like. In other approaches, thermal_diffusion_coatings_of materials such as vanadium_carbide and chemical vapor deposition (CVD)_coatings such as titanium carbide have been utilized. While_each of these_surface enhancement techniques have demonstrated_success_in_extending the service life of dies used to form conventional_alloys having_strength levels below_400 MPa, they all manifest poor performance in forming operations_involving AHSS alloys.
In some instances, thermal diffusion_and CVD coatings have been found to extend the service life_of dies used for forming AHSS alloys. However,_both of these processes tend to produce_changes in the dimensions_of_the dies