20:
177:
efficiency, which helps increase engine output as well as reduce lift friction. High-speed mode takes advantage of the pulsating intake effect created by the mode's high lift and retarded timing of intake valve closure. The resulting reduced pumping loss of the larger valve overlap yields higher power output and a reduction in friction. The low- and high-speed modes overlap for a brief period, boosting torque.
172:
At low speeds, The T-lever's wing section floats freely, enabling the low-lift cams to operate the valves. The intake rocker arms contain internal pistons, which are retained by springs in a lowered position while the engine speed is below the MIVEC switchover point, to avoid contacting the high-lift
168:
Two distinct cam profiles are used to provide two engine modes: a low-speed mode, consisting of low-lift cam profiles; and a high-speed mode. The low-lift cams and rocker arms - which drive separate intake valves - are positioned on either side of a centrally located high-lift cam. Each of the intake
156:
In essence, MIVEC serves the same function as "swapping cams", something that car racers might do when modifying older-design engines to produce more power. However, such swaps come with a compromise - generally yielding either greater low-end torque or more high-end horsepower, but not both. MIVEC
190:(CVVT) system (dual VVT on intake and exhaust valves). Many older implementations only vary the valve timing (the amount of time per engine revolution that the intake port is open) and not the lift. Timing is continuously independently controlled to provide four optimized engine-operating modes:
176:
MIVEC switches to the higher cam profile as engine speed increases, and drops back to the lower cam profile as engine speed decreases. The reduced valve overlap in low-speed mode provides stable idling, while accelerated timing of the intake valve's closing reduces backflow to improve volumetric
152:
Variable valve control systems optimize more power and torque by varying valve opening times and/or duration. Some of these valve control systems optimize performance at low and mid-range engine speeds, while others focus on enhancing only high-rpm power. The MIVEC system provides both of these
204:
Under low-speed, high load, MIVEC ensures optimal torque delivery with the intake valve closing timing advanced to ensure sufficient air volume. At the same time, the exhaust valve opening timing is retarded to provide a higher expansion ratio and improved
46:. MIVEC, as with other similar systems, varies the timing of the intake and exhaust camshafts which increases the power and torque output over a broad engine speed range while also being able to help spool a turbocharger more quickly and accurately.
238:. Under a light throttle load, the intake and exhaust valves in two of the cylinders would remain closed, and the reduced pumping losses gave a claimed 10–20 percent improvement in fuel economy. Modulated Displacement was dropped around 1996.
110:
with peak power of 200 PS (147 kW; 197 hp) at 7500 rpm. The GR model, whose otherwise identical powerplant was not MIVEC-equipped, produced 170 PS (125 kW; 168 hp) at 7000 rpm by comparison.
173:
T-shaped levers. At high speeds, hydraulic pressure elevates the hydraulic pistons, causing the T-lever to push against the rocker arm, which in turn makes the high-lift cam operate the valves.
942:
153:
benefits by controlling valve timing and lift. The basic operation of the MIVEC system is altering the cam profiles and thus tailoring engine performance in response to driver input.
92:, the MIVEC-equipped engine could achieve 175 PS (129 kW; 173 hp) at 7500 rpm. Similar improvements were seen when the technology was applied to the 1994
705:
201:
When maximum power is demanded (high engine speed and load), intake valve closing timing is retarded to synchronize the intake air pulsations for larger air volume.
935:
724:
198:, valve overlap is increased to reduce pumping losses. The exhaust valve opening timing is retarded for higher expansion ratio, enhancing fuel economy.
169:
valves is operated by a low-lift cam and rocker arm, while placing a T-lever between them allows the valves to follow the action of the high-lift cam.
872:
850:
1318:
1199:
928:
784:
765:
746:
234:
In the early years of developing its MIVEC technology, Mitsubishi also introduced a variant dubbed MIVEC-MD (Modulated
Displacement), a form of
822:
803:
1166:
960:
902:
1207:
187:
137:
1313:
702:
1237:
848:"2007 Mitsubishi Outlander Debuts New-Generation V-6 Engine And Segment-Exclusive Six-Speed Sportronic(R) Transmission"
115:
39:
1227:
1131:
1042:
968:
19:
1156:
1151:
1146:
1141:
1116:
1097:
1072:
1067:
1052:
1047:
1037:
1027:
1022:
977:
617:
448:
870:"All-New 2008 Mitsubishi Lancer Delivers Driven-To-Thrill Performance from New 152-HP Engine and Optional CVT"
721:
1277:
1136:
1032:
581:
430:
869:
847:
1184:
1179:
1174:
158:
114:
Although initially designed to enhance performance, the system has subsequently been developed to improve
89:
1257:
1189:
1126:
1121:
1107:
1102:
1092:
1087:
1082:
1077:
1062:
1057:
1017:
1012:
1007:
1002:
997:
992:
987:
982:
972:
671:
653:
635:
599:
540:
520:
502:
484:
466:
412:
394:
376:
358:
340:
320:
302:
284:
273:
264:
235:
219:
214:
182:
98:
51:
35:
1112:
781:
762:
743:
329:
56:
819:
800:
1222:
951:
130:
78:
71:
43:
1267:
1242:
165:
operation is transparent to the driver, who is simply rewarded with a smooth flow of power.
126:
1287:
1262:
876:
854:
826:
807:
788:
769:
750:
728:
709:
195:
910:
1217:
223:
118:
and emissions, and has been introduced across
Mitsubishi's range of vehicles, from the
93:
1307:
1272:
141:
1282:
1212:
119:
920:
157:
achieves both goals. With MIVEC, the "cam swap" occurs automatically at a fixed
81:
162:
63:
31:
1292:
74:
122:
1232:
140:
and also being the first VVT system to be used into a passenger car
88:
engine provided 145 PS (107 kW; 143 hp) at 7000
28:
MIVEC (Mitsubishi
Innovative Valve timing Electronic Control system)
136:
Newest developments have led to MIVEC system being evolved into a
18:
1247:
103:
59:
924:
68:
Mitsubishi
Innovative Valve timing and lift Electronic Control
208:
At idle, valve overlap is eliminated to stabilize combustion.
66:. At the time, the first generation of the system was named
529:
107:
888:
Mitsubishi Motors UK Geneva motor show 2010 presskit
1198:
1165:
959:
218:engine family is the world's first to feature a
879:, Mitsubishi Motors North America press release
857:, Mitsubishi Motors North America press release
744:"Mitsubishi Motors History - Engine Technology"
703:"Latest MMC technologies and near-future goals"
186:engine family onward, MIVEC has evolved into a
936:
8:
782:1992 Mitsubishi Lancer Cyborg specifications
49:MIVEC was first introduced in 1992 in their
896:
894:
843:
841:
839:
837:
835:
16:Automobile variable valve timing technology
943:
929:
921:
194:Under most conditions, to ensure highest
865:
863:
763:1992 Mitsubishi Lancer RS specifications
753:, Mitsubishi Motors South Africa website
739:
737:
562:
245:
901:Knowling, Michael (September 3, 2005).
695:
801:1994 Mitsubishi FTO GPX specifications
70:. The first cars to use this were the
820:1994 Mitsubishi FTO GR specifications
7:
96:, whose top-spec GPX variant had a
14:
722:History of Mitsubishi, 1990-1999
222:system applied to passenger car
188:continuous variable valve timing
138:continuous variable valve timing
1319:Mitsubishi Motors technologies
909:. No. 346. Archived from
1:
55:powerplant, a 1,597 cc
731:, Mitsubishi Motors website
712:, Mitsubishi Motors website
1335:
84:. While the conventional
125:to the high-performance
42:technology developed by
242:Current implementations
1258:Modulated Displacement
24:
1314:Variable valve timing
1293:Vertical Vortex (MVV)
236:variable displacement
220:variable valve timing
36:variable valve timing
22:
903:"Mountain of MIVECs"
829:, English.auto.vl.ru
810:, English.auto.vl.ru
791:, English.auto.vl.ru
772:, English.auto.vl.ru
559:Past implementations
133:global economy car.
57:naturally aspirated
875:2007-10-22 at the
853:2007-10-08 at the
825:2009-01-31 at the
806:2009-01-31 at the
787:2009-01-31 at the
768:2009-01-31 at the
749:2007-01-25 at the
727:2007-01-18 at the
708:2006-07-19 at the
511:Straight-4 diesel
493:Straight-4 diesel
475:Straight-4 diesel
25:
1301:
1300:
952:Mitsubishi Motors
687:
686:
556:
555:
131:Mirage/Space Star
79:Mitsubishi Lancer
72:Mitsubishi Mirage
44:Mitsubishi Motors
23:4B11 MIVEC engine
1326:
945:
938:
931:
922:
915:
914:
898:
889:
886:
880:
867:
858:
845:
830:
817:
811:
798:
792:
779:
773:
760:
754:
741:
732:
719:
713:
700:
563:
246:
127:Lancer Evolution
1334:
1333:
1329:
1328:
1327:
1325:
1324:
1323:
1304:
1303:
1302:
1297:
1288:Twin Clutch SST
1194:
1161:
1115:
969:List of engines
955:
949:
919:
918:
900:
899:
892:
887:
883:
877:Wayback Machine
868:
861:
855:Wayback Machine
846:
833:
827:Wayback Machine
818:
814:
808:Wayback Machine
799:
795:
789:Wayback Machine
780:
776:
770:Wayback Machine
761:
757:
751:Wayback Machine
742:
735:
729:Wayback Machine
720:
716:
710:Wayback Machine
701:
697:
692:
561:
552:(2005–present)
534:(2006–present)
514:(2015-present)
496:(2010-present)
478:(2010–present)
460:(2003–present)
442:(2003–present)
424:(2007–present)
406:(2007–present)
388:(2007–present)
370:(2010–present)
352:(2003–present)
334:(2003–present)
314:(2005–present)
296:(2012–present)
278:(2012–present)
244:
232:
196:fuel efficiency
150:
17:
12:
11:
5:
1332:
1330:
1322:
1321:
1316:
1306:
1305:
1299:
1298:
1296:
1295:
1290:
1285:
1280:
1275:
1270:
1265:
1260:
1255:
1250:
1245:
1240:
1235:
1230:
1225:
1220:
1215:
1210:
1204:
1202:
1196:
1195:
1193:
1192:
1187:
1182:
1177:
1171:
1169:
1163:
1162:
1160:
1159:
1154:
1149:
1144:
1139:
1134:
1129:
1124:
1119:
1110:
1105:
1100:
1095:
1090:
1085:
1080:
1075:
1070:
1065:
1060:
1055:
1050:
1045:
1040:
1035:
1030:
1025:
1020:
1015:
1010:
1005:
1000:
995:
990:
985:
980:
975:
965:
963:
957:
956:
950:
948:
947:
940:
933:
925:
917:
916:
913:on 2007-05-05.
890:
881:
859:
831:
812:
793:
774:
755:
733:
714:
694:
693:
691:
688:
685:
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681:
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631:
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624:
621:
613:
612:
609:
606:
603:
595:
594:
591:
588:
585:
577:
576:
573:
572:Configuration
570:
567:
560:
557:
554:
553:
550:
547:
544:
536:
535:
532:
527:
524:
516:
515:
512:
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461:
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268:
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255:Configuration
253:
250:
243:
240:
231:
228:
224:diesel engines
210:
209:
206:
202:
199:
149:
146:
94:Mitsubishi FTO
15:
13:
10:
9:
6:
4:
3:
2:
1331:
1320:
1317:
1315:
1312:
1311:
1309:
1294:
1291:
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1284:
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1276:
1274:
1271:
1269:
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1234:
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1191:
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1128:
1125:
1123:
1120:
1118:
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1111:
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1101:
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1021:
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1016:
1014:
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1009:
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1004:
1001:
999:
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994:
991:
989:
986:
984:
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979:
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967:
966:
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958:
953:
946:
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939:
934:
932:
927:
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923:
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908:
904:
897:
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878:
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866:
864:
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849:
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840:
838:
836:
832:
828:
824:
821:
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813:
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805:
802:
797:
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790:
786:
783:
778:
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771:
767:
764:
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756:
752:
748:
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738:
734:
730:
726:
723:
718:
715:
711:
707:
704:
699:
696:
689:
682:
679:
677:3497 cc
676:
674:
673:
669:
668:
664:
661:
659:2972 cc
658:
656:
655:
651:
650:
646:
643:
641:1998 cc
640:
638:
637:
633:
632:
628:
625:
623:1997 cc
622:
620:
619:
615:
614:
610:
607:
605:1597 cc
604:
602:
601:
597:
596:
592:
589:
587:1343 cc
586:
584:
583:
579:
578:
574:
571:
568:
565:
564:
558:
551:
548:
546:3828 cc
545:
543:
542:
538:
537:
533:
531:
528:
526:2998 cc
525:
523:
522:
518:
517:
513:
510:
508:2442 cc
507:
505:
504:
500:
499:
495:
492:
490:2268 cc
489:
487:
486:
482:
481:
477:
474:
472:1798 cc
471:
469:
468:
464:
463:
459:
456:
454:2378 cc
453:
451:
450:
446:
445:
441:
438:
436:1468 cc
435:
433:
432:
428:
427:
423:
420:
418:2359 cc
417:
415:
414:
410:
409:
405:
402:
400:1998 cc
399:
397:
396:
392:
391:
387:
384:
382:1798 cc
381:
379:
378:
374:
373:
369:
366:
364:1590 cc
363:
361:
360:
356:
355:
351:
348:
346:1499 cc
345:
343:
342:
338:
337:
333:
331:
328:
326:1332 cc
325:
323:
322:
318:
317:
313:
310:
307:
305:
304:
300:
299:
295:
292:
290:1193 cc
289:
287:
286:
282:
281:
277:
275:
272:
269:
267:
266:
262:
261:
257:
254:
251:
248:
247:
241:
239:
237:
229:
227:
225:
221:
217:
216:
212:Mitsubishi's
207:
203:
200:
197:
193:
192:
191:
189:
185:
184:
178:
174:
170:
166:
164:
160:
154:
147:
145:
143:
142:diesel engine
139:
134:
132:
129:sedan to the
128:
124:
121:
117:
112:
109:
105:
102:1997 cc
101:
100:
95:
91:
87:
83:
80:
76:
73:
69:
65:
61:
58:
54:
53:
47:
45:
41:
37:
33:
29:
21:
1283:Super Select
1278:Smart Idling
1273:Silent Shaft
1252:
1200:Technologies
954:technologies
911:the original
906:
884:
815:
796:
777:
758:
717:
698:
683:(1997–2000)
670:
652:
647:(1993–2000)
634:
616:
598:
580:
566:Engine code
539:
519:
501:
483:
465:
447:
429:
411:
393:
375:
357:
339:
319:
308:659 cc
301:
283:
270:999 cc
263:
249:Engine code
233:
213:
211:
181:
179:
175:
171:
167:
159:engine speed
155:
151:
135:
113:
97:
85:
67:
50:
48:
27:
26:
1213:Active-Trac
1185:PS platform
1180:MR platform
1175:GS platform
626:Straight-4
608:Straight-4
590:Straight-4
457:Straight-4
439:Straight-4
421:Straight-4
403:Straight-4
385:Straight-4
367:Straight-4
349:Straight-4
311:Straight-3
293:Straight-3
205:efficiency.
1308:Categories
1190:Z platform
1122:Cyclone V6
665:(1995–97)
629:(2005–07)
611:(1992–99)
593:(2002–06)
330:Straight-4
274:Straight-3
163:Cam Switch
64:straight-4
32:brand name
1167:Platforms
907:AutoSpeed
690:Footnotes
569:Capacity
252:Capacity
180:From the
148:Operation
106:24 valve
75:hatchback
62:16 valve
1147:Saturn 6
971:—
873:Archived
851:Archived
823:Archived
804:Archived
785:Archived
766:Archived
747:Archived
725:Archived
706:Archived
230:MIVEC-MD
77:and the
1132:Neptune
961:Engines
123:kei car
116:economy
38:(VVT)
30:is the
1238:M-ASTC
1233:INVECS
1157:Vulcan
1152:Sirius
1142:Saturn
1117:Astron
161:. The
40:engine
1268:S-AWC
1253:MIVEC
1137:Orion
618:4G63T
575:Year
258:Year
82:sedan
34:of a
1263:RISE
1248:MIEV
1243:MATT
1127:GEMA
672:6G74
654:6G72
636:6A12
600:4G92
582:4G19
541:6G75
521:6B31
503:4N15
485:4N14
467:4N13
449:4G69
431:4G15
413:4B12
395:4B11
377:4B10
359:4A92
341:4A91
321:4A90
303:3B20
285:3A92
265:3A90
104:DOHC
99:6A12
86:4G92
60:DOHC
52:4G92
1228:GDI
1223:AYC
1218:AWC
1208:ACD
1108:8A8
1103:6G7
1098:6G3
1093:6B3
1088:6A1
1083:4N1
1078:4M4
1073:4K2
1068:4K1
1063:4G9
1058:4G8
1053:4G6
1048:4G5
1043:4G4
1038:4G3
1033:4G1
1028:4D6
1023:4D5
1018:4J1
1013:4B4
1008:4B1
1003:4A9
998:4A3
993:3A9
988:3G8
983:3B2
978:2G2
973:2G1
680:V6
662:V6
644:V6
549:V6
215:4N1
183:4B1
90:rpm
1310::
1113:KE
905:.
893:^
862:^
834:^
736:^
530:V6
226:.
144:.
108:V6
944:e
937:t
930:v
120:i
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