摘要:
A gear train for changing the rotational speed of an input shaft (4) to transmit the resultant rotation to an output shaft (5) consists of single pinion type first (1) and third (3) planetary gear sets and a double pinion type second (2) planetary gear set. A sun gear (1S) of the first planetary gear system is normally or selectively connected to a carrier (3C) of the third planetary gear set, the carrier (3C) of the third planetary gear set is normally or selectively connected to a sun gear (2S) of the second planetary gear set, a carrier (1C) of the first planetary gear set is normally or selectively connected to a ring gear (3R) of the third planetary gear set, a ring gear (1R) of the first planetary gear set is normally or selectively connected to a ring gear (2R) of the second planetary gear set, the sun gear (2S) of the second planetary gear set is normally or selectively connected to a sun gear (3S) of the third planetary gear set, whereby at least five forward speeds and one reverse are permitted to be set.
摘要:
An automatic transmission having a gear train comprising first (1), second (2) and third (3) single-pinion planetary gear sets. The ring gear (1R) of the first single-pinion planetary gear set is connected integrally or selectively to the carrier (2C) of the second single-pinion planetary gear set, the carrier (1C) of the first single-pinion planetary gear set is connected integrally or selectively to the ring gear (3R) of the third single-pinion planetary gear set, and the sun gear (2S) of the second single-pinion planetary gear set is connected integrally or selectively to the sun gear (3S) of the third single-pinion planetary gear set. The automatic transmission is capable of being placed in any one of at least five forward gears and one reverse gear.
摘要:
A transmission includes an input shaft, an output shaft, at least three planetary gearsets, a variable-ratio unit, and at least nine clutches. The input shaft is configured to receive torque from a drive unit. The output shaft is configured to transmit torque to a load. The at least three planetary gearsets, the variable ratio-unit, and the at least nine clutches are arranged between the input shaft and the output shaft. The at least nine clutches are selectively engageable in combination with one another to select one of at least one reverse mode and at least four forward modes. The at least nine clutches include a first clutch engageable to couple the variable-ratio unit to one of the at least three planetary gearsets.
摘要:
The invention relates to a vehicle gearbox, with a drive shaft (AW), with two gearbox input shafts (GE1, GE2), with at least one separator element (K2, X1), which is assigned to the second gearbox input shaft (GE2), with a main shaft (HW), with an output shaft (AB) and with at least three planetary gear sets (PG1, PG2, PG3), wherein one sub-gearbox (TG1, TG2) is associated with each of the gearbox input shafts (GE1, GE2), wherein one of the two sub-gearboxes (TG1, TG2) comprises at least the first planetary gear set (PG1) and the other of the two sub-gearboxes (TG1, TG2) comprises at least the second planetary gear set (PG2), wherein said shafts (AB, AW, GE1, GE2, HW) are actively connected, or can be actively connected to the planetary gear sets (PG1, PG2, PG3) in such a manner that at least seven forward gears ("1", "2", "3", "4", "5", "6", "7") can be selected sequentially under load by means of the two sub-gearboxes (TG1, TG2), wherein one of these gears may be selected as a direct gear or overdrive gear.
摘要:
The invention relates to a multistep reduction gear comprising a drive shaft (1) which is connected to a front-mounted group (VS), an output shaft (3) which is connected to a rear-mounted group (NS), switch elements (A, B, C, D, E) acting on the front-mounted group (VS) and switch elements (M, H, L) acting on the rear-mounted group (NS). By selectively switching said switch elements (A, B, C, D, E and M, H, L), an input speed (n) of the drive shaft (1) is transferred to the output shaft (3) for passing at least seven forward gears, in such a way that in order to change to the next highest or next lowest gear by means of the switch elements which have just been actuated, respectively only one switching element is disconnected and a further switch element is connected.
摘要:
An automatic transmission comprising a plurality of planetary gears (G1, G2, G3, G4) disposed between an input shaft (INPUT) and an output shaft (OUTPUT) and having a plurality of rotational elements (PC1, R1, R2, M3, S3, P3, S4, R4, M2), a plurality of frictional elements (B1, B2, B3, B4, C1, C2 C3, F1, F2) selectively engaged and released for controlling rotations and connections of the rotational elements (PC1, R1, R2, M3, S3, P3, S4, R4, M2) in accordance with instructions so as to realize a plurality of gear positions, rotational speed detecting means (S12; S22) for detecting a rotational speed of a predetermined one (M3) of the rotational elements (PC1, R1, R2, M3, S3, P3, S4, R4, M2), other than the input shaft (INPUT) and the output shaft (OUTPUT), and frictional element release means (S15; S25) for releasing all of the plurality of frictional elements (B1, B2, B3, B4, C1, C2 C3, F1, F2) when it is judged that the rotational speed of the predetermined one of the plurality of rotational elements (PC1, R1, R2, M3, S3, P3, S4, R4, M2) is higher than a predetermined rotational speed.
摘要:
A multiple-ratio automatic transmission comprising a first multiple-ratio gear unit (10) and a second simple planetary gear unit (12) arranged in series in a torque flow path, each gear unit having a reaction brake (38,48) that can be selectively activated and deactivated to effect a ratio change as the first gear unit is upshifted and the second gear unit is downshifted, ratio changes in each gear unit being effected by pressure-operated clutches and brakes, the brakes (30,48) having opposed pressure-apply and pressure-release chambers. Separate exhaust flow paths (ISR,OSR) are provided for a reaction brake release chamber and for a companion pressure-operated clutch. A pressure modifier valve circuit is provided for increasing the rate of response to a command for applying and releasing the clutch.