摘要:
A dual clutch transmission unit (1) for a motor vehicle (3) is adapted to transmit the movement to an automatic gear change (5) provided with two ranks of gears; the transmission unit (1) has a rotary movement input member (45) adapted to be driven in rotation by the engine (4) of the motor vehicle (3) and two output shafts (29, 30) which are adapted to be rigidly connected to respective input shafts (9, 10) of the gear change (5) and bear respective clutch devices (39, 40) which are adapted to receive the movement from the rotary member (45) and are each associated with a relative rank of gears of the gear change (5); one of the clutch devices (39, 40) is disengaged and the other is engaged in sequence by an actuator device (15) provided with a single actuator (70) and a movement sleeve (81) coaxial with one another.
摘要:
Gear selector device of an automatic transmission in which a first lever (15) which can be operated manually (15a) is movable between a rest position (E) and a first operating position (G) to control an down-shift (INC) of the gear and a second lever (16) which can be operated manually (16a) is movable between a rest position (I) and a first operating position (L) to control an upshift (DEC) of the gear engaged. The first and the second lever produce respective second operating positions (H; L) to control the following operations: the engagement of reverse gear; the selection of an automatic mode of operation of the automatic transmission; and the selection of a 'sports'-type of mode of operation of the automatic transmission.
摘要:
Device (1) for controlling a clutch (6), which is connected to an actuator (8), which can activate the clutch (6) itself; the control device (1) comprises a position sensor (33), which can detect the position of the clutch (6), in order to supply a measuring position signal (P MIS ) to a main control device (34, 59), which receives as input information signals (S INF ), and generates as output a control signal (I, V) to control the actuator (8), a monitoring circuit (32), which can detect a state of malfunctioning of the position sensor (33), in order to supply a malfunctioning signal (COM), and an auxiliary control device (35), which can be activated in the presence of a malfunctioning signal (COM), in order to transfer control of the actuator (8) from the main control device (34) to the auxiliary control device (35).
摘要:
A double-clutch gearchange (4) presenting: two primary shafts (5); a secondary shaft (7); a plurality of pairs of gear wheels (8, 9), each of which couples mechanically the primary shaft (5), to the secondary shaft (7), defines a respective gear speed, and has a primary gear wheel (8) mounted on the primary shaft (5) and a secondary gear wheel (9) that is mounted on the secondary shaft (7) and meshes permanently with the primary gear wheel (8); a plurality of synchronizers (10), each of which is mounted coaxial to a shaft (5; 7) between two gear wheels (8; 9) of two pairs of gears and is designed to be actuated for engaging alternatively the two gear wheels (8; 9) to the shaft (5; 7); a plurality of forks (11), which actuate the synchronizers (10) and are divided into two distinct groups, each of which is associated to a respective primary shaft (5); two fingers (12), each of which is associated to a set of forks (11) for actuating all and exclusively the forks (11) of the set of forks (11) themselves; a single control shaft (13); and a single gear actuator (14) connected to the control shaft (13).
摘要:
An electric servo-control (13) for a servo-assisted gearbox (4) displaying: a control shaft (14) mounted in a movable manner to be axially displaced along a longitudinal axis (15) and to rotate about the longitudinal axis (15); at least one finger (16) which is mechanically coupled to the shaft (14) and is adapted to act on forks (17); a first mechanical transmission (20) which connects the first electric motor (18) to the control shaft (14) for transforming a rotary motion generated by the first electric motor (18) into a displacing motion of the control shaft (14); and a second mechanical transmission (20) which connects the second electric motor (19) to the control shaft (14) for transforming a rotary motion generated by the second electric motor (19) into a rotary motion of the control shaft (14).