Patents by Inventor Ünal Gazyakan
Ünal Gazyakan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7344475Abstract: A method for controlling of a drive train of a vehicle having a multi-group transmission, an output mechanism and a control apparatus for the regulation of the drive train. The multi-group transmission consists of an automatic transmission and a range group. To change the ratio of the range group the drive train is relieved of load; a shifting element of the range group is closed; a shifting element of the range group is synchronized and opened; and a ratio of the automatic transmission is so altered that a change of the ratio of the multi-group transmission is less than in a case of an individual alteration of the ratio of the range group.Type: GrantFiled: August 18, 2003Date of Patent: March 18, 2008Assignee: ZF Friedrichshafen AGInventors: Christoph Pelchen, Detlef Baasch, Barbara Schmohl, Ünal Gazyakan
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Patent number: 7247115Abstract: A method for controlling a drivetrain (1) in a motor vehicle is disclosed, in particular in an off-road vehicle with a drive unit (2), a multi-group transmission (4) and an output. The multi-group transmission (4) comprises at least an automatic gearbox (8) and a subsequent range transfer box (9) which may be switched by means of switching elements (24, 25). On changing the ratio in the range transfer box (9), a synchronisation of the switching element (24 or 25), for switching in the range transfer box (9), is carried out by means of a controller of switching elements in the automatic gearbox (8).Type: GrantFiled: August 18, 2003Date of Patent: July 24, 2007Assignee: ZF Friedrichshafen AGInventors: Christoph Pelchen, Detlef Baasch, Barbara Schmohl, Ünal Gazyakan
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Patent number: 7125358Abstract: A distributor transmission (8) having at least three shafts (11, 12, 13) for distributing a drive torque (M_GE) as needed to at least two drive axles (4, 5). A first shaft (11) is operatively connected with the first drive axle (5) and can be loaded with the drive torque (M_GE). The second shaft (12) is operatively connected with the second drive axle (4) and a torque (M_E) of a machine device (14) on a third shaft (13) can be applied which influences a degree of distribution (P_VA/P_GES) of the drive torque (M_GE) between the drive axles (4, 5).Type: GrantFiled: April 29, 2004Date of Patent: October 24, 2006Assignee: ZF Friedrichshafen AGInventors: Christoph Pelchen, Uwe Griesmeier, Ulrich Mair, Ünal Gazyakan
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Patent number: 7040472Abstract: A transfer case (1) with controllable clutch (5) for a motor vehicle, especially for a motor vehicle with part-time four-wheel drive, for distributing a driving torque coming in via a drive shaft (2) to at least two output shafts (3, 4). Hereby the output shaft (4) can be connected to the drive shaft (2) via the clutch (5), and the clutch (5) can be actuated via an electric motor (9) and a drive converter device (10) that is arranged between the electric motor (9) and the clutch (5) for converting a rotatory motion of the electric motor (9) into a translatory actuating motion for the clutch (5). The electric motor (9) is hereby designed as an induction motor.Type: GrantFiled: February 11, 2004Date of Patent: May 9, 2006Assignee: ZF Friedrichshafen AGInventors: Ünal Gazyakan, Detlef Baasch, Christoph Pelchen, Barbara Schmohl
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Patent number: 7021441Abstract: A distributor gear (1) with an adjustable coupling device (5) for a vehicle, in particular for a vehicle with a shiftable all-wheel drive is described for the distribution of an incoming drive torque via a drive shaft (2) to at least two output shafts (3, 4). It is moreover provided that an output shaft (4) can be connected via the coupling device (5) with the drive shaft (2) and that the coupling device (5) can be actuated via an electric motor (9) and a drive converter device (10) located between the electric motor (9) and the coupling device (5) for the conversion of rotary movement of the electric motor (9) into a translatory actuation movement for the coupling device (5). The electric motor (9) is incorporated into a gear (7).Type: GrantFiled: February 11, 2004Date of Patent: April 4, 2006Assignee: ZF Friedrichshafen AGInventors: Claus Granzow, Karl-Hermann Ketteler, Ünal Gazyakan, Detlef Baasch, Christoph Pelchen, Barbara Schmohl
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Patent number: 6983835Abstract: In an electromagnetically actuated dual clutch-brake combination (8), a drive input shaft (2) can be optionally engaged in drive connection with a first drive output shaft (4) or with a second drive output shaft (6). The second drive output shaft (6) is associated with an electromagnetic brake (52), which is provided in order to immobilize the second drive output shaft (6), whereas the first drive output shaft (4) can still be connected to the drive input shaft (2) by an electromagnetic clutch (28, 32). The electromagnetic dual clutch-brake combination is suitable for controlling a variable longitudinal differential lock and a shiftable range gear system of an all-wheel distributor gearbox, with only a single electric motor.Type: GrantFiled: December 22, 2003Date of Patent: January 10, 2006Assignee: ZF Friedrichshafen AGInventors: Rudolf Schneider, Ünal Gazyakan, Barbara Schmohl, Dieter Beck
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Patent number: 6951269Abstract: A device for guiding torque of one drive shaft (3) connected with a driving appliance (2) onto a first or a second output shaft (4, 5). A torque fed via the drive shaft (3) can be applied, respectively, to one of the two output shafts (4, 5) depending on a control of a changeover device (6). The changeover device (6) comprises one electromagnetic clutch (7) which can produce a power flow between the drive shaft (3) and the first or the second output shaft (4 or 5). The electromagnetic clutch (7) comprises a coupling element (8) which is guided and displaced in an axially and rotatable manner and is fixedly connected with the drive shaft (3) and depending on a current supply of the electromagnetic clutch (7) produces the power flow between the drive shaft (3) and the first or the second output shaft (4 or 5).Type: GrantFiled: November 21, 2001Date of Patent: October 4, 2005Assignee: ZF Friedrichshafen AGInventors: Rudolf Schneider, Ünal Gazyakan, Detlef Baasch, Gerhard Gumpoltsberger, Michael Erenhoch, Barbara Schmohl
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Patent number: 6945896Abstract: An auxiliary transmission (31) with controllable clutch (2) is described for the optional distribution of a drive output torque to one or more drive output shafts with a reduction gear stage (3) and with a hydraulic pump (14). The hydraulic pump (14) is arranged on a transmission input shaft (4) and the reduction gear stage (3) is connected in series in such manner that the drive input power to the hydraulic pump (14) remains at least approximately the same when a range change takes place in the reduction gear stage (3).Type: GrantFiled: October 29, 2003Date of Patent: September 20, 2005Assignee: ZF Friedrichshafen AGInventors: Christoph Pelchen, Ünal Gazyakan, Barbara Schmohl
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Patent number: 6892848Abstract: A steering system with at least one steering wheel actuator and at least one steering actuator which are connected to each other via a controlled system. Minimal steering impulses being superimposed in order to be able to determine the steering tie rod forces that occur.Type: GrantFiled: June 23, 2001Date of Patent: May 17, 2005Assignee: ZF Friedrichshafen AGInventors: Johannes Kaltenbach, Ünal Gazyakan, Hartmut Werries, Christoph Pelchen
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Patent number: 6817455Abstract: A retarder system for commercial vehicles is provided which consists of a transmission oil circuit (18) for lubrication of the transmission and of a retarder cooling circuit (4) which uses oil as operating fluid, both circuits being coupled via a connection (21) so that in the non-activated braking state of the retarder (1), for increasing the transmission oil flow rate through a radiator (3), oil can be branched off from the transmission oil circuit (18). In addition a retarder pump (12) is proposed which has a prime mover (25), preferably an electrical motor.Type: GrantFiled: April 18, 2002Date of Patent: November 16, 2004Assignee: ZF Friedrichshafen AGInventors: Ünal Gazyakan, Detlef Baasch, Roland Altvater
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Patent number: 6783475Abstract: An all-wheel distributor transmission (1) is described for a motor vehicle comprising a planetary gear set as multiplication step (2) for a switchable off-road gear and a planetary gear set (3) with variable division for distributing a drive torque onto a front axle and a rear axle. The all-wheel distributor transmission (1) also has an adjustable lock (4) for locking between the front axle and the rear axle, the lock (4) and the multiplication step (2) being actuatable via a controllable drive device (5). The drive device (5) comprises a drive shaft (6) and two output shafts (7, 8), the first output shaft (7) being in operative connection with the multiplication step (2) and the second output shaft (8) being in operative connection with the lock (4). A torque introduced via the drive shaft (6) can be applied on the first or the second output shaft (7 or 8) according to a control of a shift unit (10) for actuating the lock (4) or the multiplication step (2).Type: GrantFiled: May 5, 2003Date of Patent: August 31, 2004Assignee: ZF Friedrichshafen AGInventors: Ünal Gazyakan, Detlef Baasch, Gerhard Gumpoltsberger, Michael Ebenhoch, Barbara Schmohl
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Patent number: 6604034Abstract: A device for the suspension and for roll stabilization of motor vehicles achieves the required roll stiffness as well as the required lift stiffness without any additional springs by coordinating the ratio of the piston areas to the piston ring areas of the spring cylinders with simultaneous active engagement by an actuator integrated between the cross-wired lines.Type: GrantFiled: July 5, 2001Date of Patent: August 5, 2003Assignee: ZF Lenksysteme GmbHInventors: Frank-Detlef Speck, Ünal Gazyakan