Manual dual clutch power transmission unit for a vehicle

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);
• and
• 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);
• and
• 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 (10T) 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 (10Ya);
• 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);
• and
• 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).