140:
279:
196:
294:, one inside the other, but the internal arc spring is shorter so that it acts later. The characteristic curve of the outer arc spring is adapted to increase when the engine is started. The softer outer arc spring only acts to increase the problematic resonance frequency range. When the torque increases, reaching the maximum value, the internal arc spring also acts. In this second phase, the inner and outer arc springs work together. The collaboration of both arc springs thus ensures good acoustic isolation at all engine speeds.
43:
224:
214:
The absorption capacity of the vibration depends on the moving parts of the DMF, these parts are subject to wear. Whenever the clutch is replaced, the DMF should be checked for wear. The two key wear characteristics are freeplay and sideplay (rock). These should be measured to determine whether the
206:
Dual-mass flywheels were developed to address the escalation of torque and power, especially at low revs. The growing concern for the environment and the adoption of more stringent regulations have marked the development of more efficient new engines, lowering the cylinder number to 3 or even 2
306:
consists of an outer and two inner arc springs with different elastic characteristics connected in series. This category of bent spring uses the two concepts together: parallel and series connection in order to ensure optimal torsional compensation for each value of torque.
269:
are called parallel springs of one phase. These consist of an outer and an inner arc spring of almost equal lengths and connected in parallel. The individual characteristic curves of the two arc springs are added to form the characteristic curve of the spring pair.
245:. The planetary gear and the torsional damper are incorporated into the main flywheel. For this purpose, the main flywheel is divided into primary and secondary pinion-connected masses, and between them there are four different types of bent springs:
215:
flywheel is serviceable. The wear limit specifications can be found in vehicle or flywheel manufacturer's published documentation. Other failure modes are severely grooved/damaged clutch mating surface, grease loss, and cracking.
175:
or revolutions that could cause an unwanted vibration. The vibration reduction is achieved by accumulating stored energy in the two flywheel half masses over a period of time but damped by
388:
179:, doing that at a rate that is compatible with the energy source, and then releasing that energy at a much higher rate over a relatively short time. A compact dual-mass
207:
cylinders, and allowing the delivery of more torque and power at low revolutions. The counterpart has been an increase in the level of vibration which traditional
361:
436:
1098:
211:
discs are unable to absorb. This is where the dual-mass flywheels play a key role, making these mechanical developments more viable.
429:
107:
79:
1004:
86:
422:
60:
943:
17:
365:
126:
93:
621:
75:
64:
860:
918:
316:
502:
403:
445:
341:
1054:
968:
933:
913:
865:
773:
1049:
890:
599:
139:
824:
331:
195:
53:
100:
646:
278:
763:
604:
758:
530:
8:
908:
806:
536:
1093:
829:
626:
163:) in systems where the energy source is not continuous, the same way as a conventional
631:
571:
522:
336:
160:
923:
880:
839:
788:
753:
674:
661:
199:
1034:
745:
594:
551:
900:
870:
725:
492:
1087:
1072:
963:
956:
778:
710:
705:
669:
586:
526:
487:
477:
414:
159:) is a rotating mechanical device that is used to provide continuous energy (
202:
torque converter with a pendulum absorber using the same DMF's bent springs.
689:
684:
651:
556:
546:
482:
466:
27:
Device used to smooth and dampen abrupt changes in rotational speed/torque
1067:
951:
768:
720:
679:
636:
566:
1039:
999:
978:
973:
875:
783:
715:
641:
581:
512:
303:
291:
283:
266:
254:
230:
176:
994:
735:
730:
517:
497:
286:
supported by a sliding shell in a torque-angle characteristic curve.
42:
1017:
1013:
885:
616:
541:
507:
326:
180:
164:
31:
1044:
928:
168:
855:
834:
611:
561:
321:
208:
184:
172:
290:
In the case of two-stage spring there are two curved parallel
253:
The simplest form of the bent spring is the standard single
1009:
456:
282:
Representation of the friction hysteresis of a two-stage
223:
187:, including the pressure plate and the friction disc.
273:
260:
67:. Unsourced material may be challenged and removed.
1085:
444:
384:
382:
430:
379:
437:
423:
297:
248:
127:Learn how and when to remove this message
503:Crankcase ventilation system (PCV valve)
277:
222:
194:
138:
14:
1086:
418:
1099:Automotive transmission technologies
65:adding citations to reliable sources
36:
24:
274:Two-phase bent springs in parallel
261:One-phase bent springs in parallel
25:
1110:
397:
237:Blue: flywheel, transmission side
227:Principle of dual-mass flywheel.
41:
605:Overhead valve (pushrod) layout
52:needs additional citations for
354:
235:Red: flywheel, crankshaft side
13:
1:
347:
317:Centrifugal pendulum absorber
7:
310:
10:
1115:
446:Internal combustion engine
342:List of moments of inertia
241:The main type is called a
190:
143:Dual-mass flywheel section
29:
1063:
1027:
987:
942:
914:Diesel particulate filter
899:
866:Idle air control actuator
848:
815:
807:Engine control unit (ECU)
797:
744:
698:
660:
580:
465:
452:
183:often includes the whole
171:any violent variation of
979:Viscous fan (fan clutch)
891:Throttle position sensor
600:Overhead camshaft layout
218:
518:Core plug (freeze plug)
332:Flywheel energy storage
298:Three-phase bent spring
287:
249:Individual bent spring
238:
203:
144:
281:
226:
198:
142:
759:Compression ignition
76:"Dual-mass flywheel"
61:improve this article
30:For other uses, see
909:Catalytic converter
1035:Knocking / pinging
627:Combustion chamber
405:dual-mass flywheel
288:
239:
204:
149:dual-mass flywheel
145:
18:Dual mass flywheel
1081:
1080:
1050:Stratified charge
817:Electrical system
799:Engine management
632:Compression ratio
572:Starter ring gear
471:rotating assembly
337:Harmonic balancer
161:rotational energy
137:
136:
129:
111:
16:(Redirected from
1106:
924:Exhaust manifold
789:Spark plug wires
675:Boost controller
662:Forced induction
439:
432:
425:
416:
415:
391:
386:
377:
376:
374:
373:
364:. Archived from
358:
132:
125:
121:
118:
112:
110:
69:
45:
37:
21:
1114:
1113:
1109:
1108:
1107:
1105:
1104:
1103:
1084:
1083:
1082:
1077:
1059:
1055:Top dead centre
1023:
983:
938:
895:
844:
818:
811:
800:
793:
740:
694:
656:
612:Tappet / lifter
595:Flathead layout
585:
576:
470:
461:
448:
443:
412:
400:
395:
394:
387:
380:
371:
369:
360:
359:
355:
350:
313:
300:
276:
263:
251:
236:
234:
228:
221:
193:
133:
122:
116:
113:
70:
68:
58:
46:
35:
28:
23:
22:
15:
12:
11:
5:
1112:
1102:
1101:
1096:
1079:
1078:
1076:
1075:
1070:
1064:
1061:
1060:
1058:
1057:
1052:
1047:
1042:
1037:
1031:
1029:
1025:
1024:
1022:
1021:
1007:
1002:
997:
991:
989:
985:
984:
982:
981:
976:
971:
966:
960:
959:
954:
948:
946:
944:Cooling system
940:
939:
937:
936:
931:
926:
921:
916:
911:
905:
903:
901:Exhaust system
897:
896:
894:
893:
888:
883:
878:
873:
871:Inlet manifold
868:
863:
858:
852:
850:
846:
845:
843:
842:
837:
832:
827:
821:
819:
816:
813:
812:
810:
809:
803:
801:
798:
795:
794:
792:
791:
786:
781:
776:
771:
766:
761:
756:
750:
748:
742:
741:
739:
738:
733:
728:
726:Fuel injection
723:
718:
713:
708:
702:
700:
696:
695:
693:
692:
687:
682:
677:
672:
666:
664:
658:
657:
655:
654:
649:
644:
639:
634:
629:
624:
619:
614:
608:
607:
602:
597:
591:
589:
578:
577:
575:
574:
569:
564:
559:
554:
549:
544:
539:
534:
520:
515:
510:
505:
500:
495:
493:Connecting rod
490:
485:
480:
474:
472:
463:
462:
453:
450:
449:
442:
441:
434:
427:
419:
410:
409:
399:
398:External links
396:
393:
392:
378:
352:
351:
349:
346:
345:
344:
339:
334:
329:
324:
319:
312:
309:
299:
296:
275:
272:
262:
259:
250:
247:
220:
217:
192:
189:
135:
134:
49:
47:
40:
26:
9:
6:
4:
3:
2:
1111:
1100:
1097:
1095:
1092:
1091:
1089:
1074:
1071:
1069:
1066:
1065:
1062:
1056:
1053:
1051:
1048:
1046:
1043:
1041:
1038:
1036:
1033:
1032:
1030:
1026:
1019:
1015:
1011:
1008:
1006:
1003:
1001:
998:
996:
993:
992:
990:
986:
980:
977:
975:
972:
970:
967:
965:
962:
961:
958:
957:Water cooling
955:
953:
950:
949:
947:
945:
941:
935:
934:Oxygen sensor
932:
930:
927:
925:
922:
920:
917:
915:
912:
910:
907:
906:
904:
902:
898:
892:
889:
887:
884:
882:
879:
877:
874:
872:
869:
867:
864:
862:
859:
857:
854:
853:
851:
849:Intake system
847:
841:
840:Starter motor
838:
836:
833:
831:
828:
826:
823:
822:
820:
814:
808:
805:
804:
802:
796:
790:
787:
785:
782:
780:
779:Ignition coil
777:
775:
772:
770:
767:
765:
762:
760:
757:
755:
752:
751:
749:
747:
743:
737:
734:
732:
729:
727:
724:
722:
719:
717:
714:
712:
711:Petrol engine
709:
707:
706:Diesel engine
704:
703:
701:
697:
691:
688:
686:
683:
681:
678:
676:
673:
671:
670:Blowoff valve
668:
667:
665:
663:
659:
653:
650:
648:
645:
643:
640:
638:
635:
633:
630:
628:
625:
623:
620:
618:
615:
613:
610:
609:
606:
603:
601:
598:
596:
593:
592:
590:
588:
587:Cylinder head
583:
579:
573:
570:
568:
565:
563:
560:
558:
555:
553:
550:
548:
545:
543:
540:
538:
535:
532:
528:
524:
521:
519:
516:
514:
511:
509:
506:
504:
501:
499:
496:
494:
491:
489:
486:
484:
481:
479:
478:Balance shaft
476:
475:
473:
468:
464:
460:
458:
451:
447:
440:
435:
433:
428:
426:
421:
420:
417:
413:
407:
406:
402:
401:
390:
385:
383:
368:on 2016-11-04
367:
363:
357:
353:
343:
340:
338:
335:
333:
330:
328:
325:
323:
320:
318:
315:
314:
308:
305:
304:curved spring
295:
293:
285:
280:
271:
268:
265:The standard
258:
256:
246:
244:
243:planetary DMF
232:
225:
216:
212:
210:
201:
197:
188:
186:
182:
178:
174:
170:
166:
162:
158:
154:
150:
141:
131:
128:
120:
109:
106:
102:
99:
95:
92:
88:
85:
81:
78: –
77:
73:
72:Find sources:
66:
62:
56:
55:
50:This article
48:
44:
39:
38:
33:
19:
964:Electric fan
764:Coil-on-plug
690:Turbocharger
685:Supercharger
557:Main bearing
547:Firing order
537:Displacement
483:Block heater
467:Engine block
455:Part of the
454:
411:
404:
389:LUK Symposia
370:. Retrieved
366:the original
356:
301:
289:
264:
252:
242:
240:
213:
205:
156:
152:
148:
146:
123:
114:
104:
97:
90:
83:
71:
59:Please help
54:verification
51:
988:Lubrication
952:Air cooling
769:Distributor
721:Fuel filter
699:Fuel system
680:Intercooler
647:Timing belt
637:Head gasket
567:Piston ring
362:"Luk DMF's"
292:arc springs
267:arc springs
231:arc springs
177:arc springs
117:August 2018
1088:Categories
1040:Power band
1000:Oil filter
974:Thermostat
919:EGT sensor
881:MAF sensor
876:MAP sensor
861:Air filter
825:Alternator
784:Spark plug
716:Carburetor
642:Rocker arm
582:Valvetrain
513:Crankshaft
457:Automobile
372:2015-01-11
348:References
284:arc spring
255:arc spring
200:Schaeffler
167:acts, but
87:newspapers
1094:Flywheels
774:Glow plug
736:Fuel tank
731:Fuel pump
498:Crankcase
1073:Category
1018:Dry sump
1014:Wet sump
1005:Oil pump
969:Radiator
886:Throttle
746:Ignition
617:Camshaft
542:Flywheel
523:Cylinder
508:Crankpin
327:Flywheel
311:See also
181:flywheel
165:flywheel
32:Flywheel
1045:Redline
929:Muffler
830:Battery
754:Magneto
229:Black:
191:History
169:damping
101:scholar
1068:Portal
856:Airbox
835:Dynamo
562:Piston
552:Stroke
531:layout
459:series
322:Clutch
209:clutch
185:clutch
173:torque
103:
96:
89:
82:
74:
1028:Other
652:Valve
622:Chest
302:This
219:Types
108:JSTOR
94:books
1010:Sump
527:bank
488:Bore
157:DMFW
80:news
995:Oil
584:and
469:and
155:or
153:DMF
63:by
1090::
1016:,
529:,
381:^
257:.
233:.
147:A
1020:)
1012:(
533:)
525:(
438:e
431:t
424:v
408:.
375:.
151:(
130:)
124:(
119:)
115:(
105:·
98:·
91:·
84:·
57:.
34:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
.jpg)