Abstract: Range gearbox for motor vehicles adapted to be connected to the output side of a basic gearbox and including planetary gear (7), enclosed in a housing (3), with a sun wheel (9) arranged on an input shaft (5) and engaged with planet wheels (10). The ring gear (14) is selectively lockable in order to establish gearing between the input shaft and the output shaft. Interacting tooth faces of the planetary gear (7) are angled in such a manner in relation to the longitudinal axis of the input shaft (5) and the output shaft (8) so that an axial force arises on the ring gear (14) from gear speed changes during synchronizing, and this force, at least on shifting to the low range position, tends to move the ring gear in the same direction as an external shifting force.

Abstract: A device is provided for preventing gear hopout in a tooth clutch in a vehicle transmission. The tooth clutch includes an engaging sleeve having sleeve clutch teeth that can selectably be brought in and out of an engaged state with mating clutch teeth by axial displacement of the engaging sleeve. Axial displacement is carried out by a shift actuator system. The shift actuator system is activated at some cases when the tooth clutch is in the engaged state in order to prevent gear hopout.

Abstract: Method and arrangement for providing a range gearbox with a planetary gear (1) for a motor vehicle that is configured to be connected to the output side of a basic gearbox. The ring gear (18) of the planetary gear is axially displaceable. The ring gear (18) can alternatively engage coupling rings (10, 16). A synchronizing ring (15) is intended to synchronize the rotational speed difference between the ring gear (18) and one or other coupling ring (10, 16). The synchronizing ring (15) and the coupling ring (16) are arranged coaxially outside the ring gear (18). Bars (25) for engaging the coupling ring (16) and bars (25, 25b) for driving said synchronizing ring (15) are arranged on the radially external side of the ring gear (18). The coupling ring (16) is arranged between the synchronizing ring (15) and the fork (27).

Abstract: Method and arrangement for providing a range gearbox with planetary gear (1) for motor vehicles, intended to be connected to the output side of a basic gearbox. The ring gear (18) of the planetary gear is axially displaceable. The ring gear (18) can engage coupling rings (10, 16) alternatively. A synchronizing means (15) is intended to synchronize the rotational speed difference between the ring gear (18) and at least the coupling ring (16). The synchronizing means (15) and the coupling ring (16) are arranged coaxially outside the ring gear (18). A second means (25) for engaging the coupling ring (16) and a third means (25, 25b) for driving the synchronizing means (15) are arranged on the external side, seen radially, of the ring gear (18), and the synchronizing means (15) is arranged between the coupling ring (16) and the first means (27) for axial displacement of the ring gear (18).

Abstract: A range gearbox with planetary gear (1) for motor vehicles intended to be connected to the output side of a basic gearbox. The ring gear (18) of the planetary gear is axially displaceable. The ring gear (18) can engage coupling rings (10, 16) alternatively. A synchronizing member or member (15) is intended to synchronize the rotational speed difference between the ring gear (18) and one or other coupling ring (10, 16). The synchronizing means (15) and the coupling ring (16) are arranged coaxially outside the ring gear (18). A second member or engagement member (25) for engaging the coupling ring (16) and a third member or engagement member (25, 25b) for driving said synchronizing member (15) are arranged on the external side, as seen radially, of the ring gear (18). The coupling ring (16) is arranged between the synchronizing member (15) and the first member (27).

Abstract: Method and arrangement for providing a range gearbox with planetary gear (1) for motor vehicles, intended to be connected to the output side of a basic gearbox. The ring gear (18) of the planetary gear is axially displaceable. The ring gear (18) can engage coupling rings (10, 16) alternatively. A synchronizing means (15) is intended to synchronize the rotational speed difference between the ring gear (18) and at least the coupling ring (16). The synchronizing means (15) and the coupling ring (16) are arranged coaxially outside the ring gear (18). A second means (25) for engaging the coupling ring (16) and a third means (25, 25b) for driving the synchronizing means (15) are arranged on the external side, seen radially, of the ring gear (18), and the synchronizing means (15) is arranged between the coupling ring (16) and the first means (27) for axial displacement of the ring gear (18).

Abstract: Hydraulic control system for a vehicle transmission connected to an output shaft from a hydraulic torque converter (1) with a hydraulically operated disc clutch for locking the torque converter and which has two hydraulically operated disc clutches for shifting. The control system has a low pressure circuit (30) with a low-pressure pump feeding fluid through the torque converter, and a high pressure circuit (34) with a high-pressure pump (35), which feeds fluid via valves (38) to the disc clutches. The high-pressure pump has variable displacement, which is regulated by the operating pressure of the disc clutch of the torque converter, so that the high-pressure pump is set to a lower displacement when this last-mentioned clutch is engaged than when it is disengaged.

Abstract: A range gearbox with planetary gear (1) for motor vehicles intended to be connected to the output side of a basic gearbox. The ring gear (18) of the planetary gear is axially displaceable. The ring gear (18) can engage coupling rings (10, 16) alternatively. A synchronizing means or member (15) is intended to synchronize the rotational speed difference between the ring gear (18) and one or other coupling ring (10, 16). The synchronizing means (15) and the coupling ring (16) are arranged coaxially outside the ring gear (18). A second means or engagement member (25) for engaging the coupling ring (16) and a third means or engagement member (25, 25b) for driving said synchronizing means (15) are arranged on the external side, as seen radially, of the ring gear (18). The coupling ring (16) is arranged between the synchronizing means (15) and the first means (27).

Abstract: Method and arrangement for providing a synchronization device that is provided in a range gear assembly within planetary gearing in a vehicle. During synchronization and gear changing, at least one spring suspension element (28, 34, 46) transmits bearing force from the clutch sleeve to the synchronization ring by means of cooperation with first recesses (32, 33, 47, 48) in the clutch sleeve (18). The clutch sleeve, clutch rings, synchronization ring and spring suspension elements are provided on one side of the ring gear (14). The synchronization ring (24, 45) is constructed together with an additional mirror-inverted synchronization ring in order to form a double synchronization ring (24, 45).

Abstract: Method and arrangement for providing a range gearbox with a planetary gear (1) for a motor vehicle that is configured to be connected to the output side of a basic gearbox. The ring gear (18) of the planetary gear is axially displaceable. The ring gear (18) can alternatively engage coupling rings (10, 16). A synchronizing means (15) is intended to synchronize the rotational speed difference between the ring gear (18) and one or other coupling ring (10, 16). The synchronizing means (15) and the coupling ring (16) are arranged coaxially outside the ring gear (18). A second means (25) for engaging the coupling ring (16) and a third means (25, 25b) for driving said synchronizing means (15) are arranged on the radially external side of the ring gear (18). The coupling ring (16) is arranged between the synchronizing means (15) and the first means (27).

Abstract: Method and arrangement for providing a synchronization device that is provided in a range gear assembly within planetary gearing in a vehicle. During synchronization and gear changing, at least one spring suspension element (28, 34, 46) transmits bearing force from the clutch sleeve to the synchronization ring by means of cooperation with first recesses (32, 33, 47, 48) in the clutch sleeve (18). The clutch sleeve, clutch rings, synchronization ring and spring suspension elements are provided on one side of the ring gear (14). The synchronization ring (24, 45) is constructed together with an additional mirror-inverted synchronization ring in order to form a double synchronization ring (24, 45).

Abstract: Hydraulically operated double clutch with first and second piston-cylinder devices for engagement and disengagement of the respective clutch unit. The cylinder chamber (17) of the first piston-cylinder device is delimited between its piston (18) and a first wall (4) of the clutch housing (1), while the cylinder chamber (24) of the second piston-cylinder device is delimited between its piston (25) and the first mentioned piston (18). A third cylinder chamber (30) is delimited between the piston (25) of the second piston-cylinder device and a second wall (6) of the clutch housing (1). Channels (31-34) are arranged for supply of pressure medium to and from the cylinder chambers, so that the pressure of the pressure medium in the engagement direction on either piston generates at the same time a return force on the other piston, balancing the force in the engagement direction generated by the centrifugal force on the pressure medium.

Abstract: Hydraulic control system for a vehicle transmission connected to an output shaft from a hydraulic torque converter (1) with a hydraulically operated disc clutch for locking the torque converter and which has two hydraulically operated disc clutches for shifting. The control system has a low pressure circuit (30) with a low-pressure pump feeding fluid through the torque converter, and a high pressure circuit (34) with a high-pressure pump (35), which feeds fluid via valves (38) to the disc clutches. The high-pressure pump has variable displacement, which is regulated by the operating pressure of the disc clutch of the torque converter, so that the high-pressure pump is set to a lower displacement when this last-mentioned clutch is engaged than when it is disengaged.

Abstract: Hydraulically operated double clutch with first and second piston-cylinder devices for engagement and disengagement of the respective clutch unit. The cylinder chamber (17) of the first piston-cylinder device is delimited between its piston (18) and a first wall (4) of the clutch housing (1), while the cylinder chamber (24) of the second piston-cylinder device is delimited between its piston (25) and the first mentioned piston (18). First and second peripherally spaced helical springs bias the pistons in the disengagement direction. The piston (18) of the first piston-cylinder device is provided with axially directed fingers, which are arranged between the springs (19) at substantially the same radius (r) as the mean radius of the pressure plate (8) of the first clutch unit and which, upon supply of pressure medium to the cylinder chamber (17) press against the pressure plate to engage the first clutch unit.

Abstract: Range gearbox for motor vehicles adapted to be connected to the output side of a basic gearbox. The range gearbox includes a planetary gear (7), enclosed in a housing (3), with a sun wheel (9) arranged on an input shaft (5) and engaged with planet wheels (10). The planet wheels are carried by a planet wheel carrier (12) that is connected to an output shaft (8) and engageable with an axially displaceable ring gear (14). The ring gear (14) is selectively lockable, via a coupling means, in a first coupling position in which the gear (14) is non-rotatably connected to the housing in order to establish gearing between the input shaft and the output shaft, and in a second coupling position in which the gear (14) is non-rotatably connected to one of the input shaft and the output shaft in order to establish direct drive therebetween.

Abstract: Vehicle gearbox with a control shaft rotatably and axially displacebly mounted transversely to the axial direction of the vehicle gearbox, the rotational movement of the control shaft from a neutral position effecting, via motion-transmitting elements, engagement of a gear speed. A lock element cooperating with the control shaft is coordinated with a sensor sensing the position of a clutch connected to the gearbox, and locks the control shaft in the neutral position when the clutch pedal is not depressed.

Abstract: A vehicle gearbox includes a basic gearbox with a main shaft that is an input shaft to a high-low range gearset joined to the basic gearbox. The basic gearbox has a control shaft, which, rotated in either direction from a neutral position, engages a selected gear. The control shaft is coordinated with a lock-out device which is controlled by a first sensor, which senses the speed of the output shaft from the range gearbox, and a second sensor which senses the engaged range in the range gearbox. An operating device holds the lock-out device in a lock-out position which prevents rotation of the control shaft towards the position for the lowest synchronized gear in the basic box, when the vehicle speed exceeds a predetermined speed in the low range of the gearbox.

Abstract: Motor vehicle gearbox with two concentrically mounted input shafts (6, 9) each driving an individual lay shaft (12, 15), said lay shafts being located at different radial distances (S.sub.1, S.sub.2) from an output shaft. Opposite gears (16, 17, 18, 19) meshing in pairs with a common gear (21, 22) on the output shaft (20) have different numbers of teeth, due to the teeth of one gear being addendum modified in relation to the teeth of the other gear.

Abstract: Motor vehicle gearbox with alternately driven, double concentric input shafts (6,9) , double lay shafts and an output shaft (19). The outer input shaft (9) is mounted in a front end wall (12) of the gearbox housing. The inner input shaft (6) is mounted in the outer shaft and has at its proximal portion a shaft end (17), which extends into a bore (18) in the output shaft and is carried in the bore in two bearings (20,22) spaced from each other.

Abstract: Motor vehicle gearbox of the "power shift" type with two intermediate shafts (3, 4) for alternately transmitting an input torque to an output shaft (5). The intermediate shafts each present a pair of lockable gear wheels (10, 11 and 15, 16, resp.), rotatably mounted on respective shafts and lockable by couplings (12, 13 and 18, 19, resp.). The gear wheels engage with a pair of gear wheels (20, 21) common for both the intermediate shafts, mounted rotatably on the output shaft and drivably coupled together in order to allow torque transmission from the one intermediate shaft (3) to the other intermediate shaft (4) via either one or both of the common gear wheels (20, 21).