A manual dual clutch power transmission unit 10 for a vehicle, said power transmission unit 10 comprising:
- a synchro-shuttle transmission unit 10S comprising a forward drive gear 12 adapted to be mounted onto a wet clutch shaft 10W at a predetermined position;
- a reverse drive gear 13 adapted to be mounted onto a main drive shaft 10M through a reverse drive gear driven bush 13B at a predetermined position and rotatably connected to said forward drive gear 12 through a cluster of reverse idler gears 14;
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- a forward and reverse synchronizer unit 11 adapted to be mounted onto said main drive shaft 10M between said a reverse drive gear 13 and said forward drive gear 12;
- a multi-speed transmission unit 10T comprising an odd shaft 16;
- an even shaft 18;
- an output shaft 20;
- a plurality of odd drive gears 16X comprising a first drive gear 16A adapted to be mounted onto said odd shaft 16 through a first drive gear driven bush 16Ab at a predetermined position, a third drive gear 16B adapted to be mounted onto said odd shaft 16 through a third drive gear driven bush 16Bb, a fifth drive gear 16C adapted to be mounted onto said odd shaft 16 through a fifth drive gear driven bush 16Cb at a predetermined position and a seventh drive gear 16D adapted to be mounted onto said odd shaft 16 through a seventh drive gear driven bush 16Db at a predetermined position;
- a plurality of even drive gears 18Y comprising a second drive gear 18A adapted to be mounted onto said even shaft 18 through a second drive gear driven bush 18Ab at a predetermined position, a fourth drive gear 18B adapted to be mounted onto said even shaft 18 through a fourth drive gear driven bush 18Bb at a predetermined position, a sixth drive gear 18C is mounted onto said even shaft 18 through a sixth drive gear driven bush 18Cb at a predetermined position and a eighth drive gear 18D is mounted onto said even shaft 18 through an eighth drive gear driven bush 18Db at a predetermined position;
- a plurality of driven gears 20X comprising a first and second driven gear 20A adapted to be mounted onto said output shaft 20 at a predetermined position and rotatably connected to said first drive gear 16A and said second drive gear 18A, a third and fourth driven gear 20B adapted to be mounted onto said output shaft 20 at a predetermined position and rotatably connected to said third drive gear 16B and said fourth drive gear 18B, a fifth and sixth driven gear 20C adapted to be mounted onto said output shaft 20 at a predetermined position and rotatably connected to said fifth drive gear 16C and said sixth drive gear 18C, and seventh and eighth driven gear 20D adapted to be mounted onto said output shaft 20 at a predetermined position and rotatably connected to said seventh drive gear 16D and said eighth drive gear 18D;
- a plurality of odd synchronizers units 22 comprising a first and fifth synchronizer unit 22A adapted to be mounted onto said odd shaft 16 at a predetermined position between said first drive gear 16A and said fifth drive gear 16C, and third and seventh synchronizer unit 22B adapted to be mounted onto said odd shaft 16 at a predetermined position between said third drive gear 16B and said seventh drive gear 16D;
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- a plurality of even synchronizers units 24 comprising a second and sixth synchronizer unit 24A adapted to be mounted onto said even shaft 18 at a predetermined position between said second drive gear 18A and said sixth drive gear 18C, and fourth and eighth synchronizer unit 24B adapted to be mounted onto said even shaft 18 at a predetermined position between said fourth drive gear 18B and said eighth drive gear 18D;
- an odd shaft drive gear 10Xa adapted to be mounted onto said wet clutch shaft 10W through an odd shaft drive gear driven bush 10Xc at a predetermined position;
- an even shaft drive gear 10Ya adapted to be mounted onto said wet clutch shaft 10W through an even shaft drive gear driven bush 10Yc at a predetermined position;
- a dual clutch unit 10D adapted to be mounted onto said wet clutch shaft 10W at a predetermined position between said odd shaft drive gear 10Xa and said even shaft drive gear 10Ya, said dual clutch unit 10D comprising an odd clutch unit 10E adapted to drive said odd shaft drive gear 10Xa on actuation of said odd clutch unit 10E and an even clutch unit 10F adapted to drive said even shaft drive gear 10Ya on actuation of said even clutch unit 10F;
- an odd shaft driven gear 10Xb adapted to be mounted onto said odd shaft 16 of said multi-speed transmission unit 16T at a predetermined position and rotatably connected to said odd shaft drive gear 10Xa;
- an even shaft driven gear 10Yb is mounted to said even shaft 18 of said multi-speed transmission unit 10T at a predetermined position and rotatably connected to said even shaft drive gear 10Y;
- a range transmission unit 10R comprising a range driving shaft 26 adapted to be rotatably connected to said output shaft 20 of said multi-speed transmission unit 10T;
- a range driven shaft 28;
- a low range drive gear 30 adapted to be integrated with said driving shaft 26;
- a medium range drive gear 32 adapted to be mounted onto said range driving shaft 26 at a predetermined position;
- a low range driven gear adapted to be mounted onto said range driven shaft 28 through a low range driven gear driven bush 34B at a predetermined position and rotatably connected to said low range drive gear 30;
- a medium range driven gear 36 adapted to be mounted onto said range driven shaft 28 through a medium range driven gear driven bush 36B at a predetermined position and rotatably connected to said medium range drive gear 32;
- a high range coupler 20H adapted to be integrated with said output shaft 20 of the multi-speed transmission unit 10T at a predetermined position;
- a transmission control mechanism 100 comprising a transmission shift lever 102, a gear shift lever support arrangement 103, a shift gate element 104, a gear shift lever auto-return mechanism 105, a shifter arm 106, an input ratchet shifting assembly 108, an input shift ratchet and cam assembly 110, a drive shaft 112, a plurality of keys 113, a driven shaft 114, a coupler 115, a driven shaft drive gear 116, a driven shaft driven gear 118, a plurality of rail shifting means 120, a plurality of bushes 121, a plurality of rail shifter support members 122, a plurality of pawl assemblies 124, a plurality of pawl kicker means 126, a plurality of shift rails 128, a plurality of shift rail-ends 130, a plurality of synchronizers units 132, a plurality of shift forks 134, a lever position control valve assembly 136, an active detent control valve assembly 138, a detent control valve assembly 140, a clutch selection control valve assembly 142, a lever position valve lever 144 and a master clutch control valve assembly 100M;
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- an auxiliary actuation mechanism 200 comprising transmission actuating gear 202;
- a gear driven bush 204;
- a gear actuating means 206;
- a shift fork 208;
- a shift rail 210;
- a clutch control valve actuating arm 212;
- a rail shifting means 214;
- a rail shifter turn link 21;
- a coupler 218;
- an auxiliary transmission actuating shift lever 220;
- a rail shifter locking means 22;
- a spacer 224;
- a detent engaging element 226;
- a spring 228;
- a spring retainer 230.