Patents Assigned to Volvo Lastvagner
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Patent number: 9027530Abstract: A method of calibration of at least one fuel injector for a fuel burner in an exhaust gas treatment system for an internal combustion engine is provided. The method is adapted for an exhaust gas system having the fuel burner mounted upstream of a diesel particle filter (DPF). The method of calibration is performed during an idle speed of the combustion engine, this to assure a constant temperature of the burner during the calibration. Hence, the method is started when a first steady tempera tore is registered in the fuel burner, wherein the at least one fuel injector, is operated with a first pulse width. A first temperature of an exhaust gas is registered directly downstream of the fuel burner. After this first temperature is registered, the pulse width, of the fuel injector changed into a second pulse width, which is different from the first pulse width.Type: GrantFiled: February 7, 2012Date of Patent: May 12, 2015Assignee: Volvo Lastvagner ABInventor: Mats Moren
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Patent number: 8752442Abstract: A multi-clutch power shift transmission for a motor vehicle with at least one prime mover is provided, where a shaft brake unit is arranged to reduce the rotational speed of one of two input shafts, and a central synchronizing unit is arranged to make a first of the input shafts rotate faster or slower than a second of the input shafts. The shaft brake unit and the central synchronizing unit are arranged to be simultaneously activated in order to reduce rotating speeds prior to the engagement of tooth clutches when the output shaft is not rotating. The input shaft brake unit is arranged to be used when performing a multi-step power shift.Type: GrantFiled: December 11, 2009Date of Patent: June 17, 2014Assignee: Volvo Lastvagner ABInventors: Anders Hedman, Lars Zettergren
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Patent number: 8579332Abstract: A tank arrangement for a vehicle, particularly a truck, includes at least a first fuel tank and a second fuel tank which are connected by a balancing pipe, a suction pipe for feeding fuel to an engine and a return pipe for feeding fuel from the engine to at least one of the fuel tanks. The balancing pipe is provided with a first end to supply fuel to the first tank and a second end to suck fuel from the second tan, wherein a check valve is arranged upstream of the return pipe in the balancing pipe between the at least two tanks allowing a flow direction from the second tank to the first tank and blocking a flow in the reverse direction. Suction of fuel to the engine is from the first tank only. The check valve provides an automatic purging of the system.Type: GrantFiled: December 12, 2008Date of Patent: November 12, 2013Assignee: Volvo Lastvagner ABInventors: Sigurd Sonderegger, Anders Ivarsson
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Patent number: 8360194Abstract: A transfer box for transferring movements and forces from a gearshift lever of a tiltable vehicle cab portion to a gearbox includes a first frame portion mounted on the cab portion, the first frame portion including at least one first journalled lever portion and being connectable to cable ends or push rods connected to the gear shift lever, a second frame portion mounted on a vehicle chassis, the second frame portion including at least one journalled second lever portion and being connected to the gearbox via cable ends or pushrods, wherein the first lever portions and the second lever portions interact to enable movement/force transfer from the cable ends/push rods connected to the first lever portions to the cable ends/push rods connected to the second lever portions. The at least one first and the at least one second lever portions are provided with wedge shaped cooperating portions.Type: GrantFiled: January 12, 2007Date of Patent: January 29, 2013Assignee: Volvo Lastvagner ABInventor: Klas Bergström
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Publication number: 20110296833Abstract: A method and an arrangement are provided for reducing a NOx-content in the exhaust gas of an internal combustion engine in a vehicle. The combustion engine includes at least one cylinder, an intake for the supply of air, an exhaust outlet for discharging exhaust gases into an exhaust after treatment system for reducing emissions of the internal combustion engine. An exhaust gas recirculation supplies exhaust gas from the exhaust outlet to the intake of the internal combustion engine, and at least two energy absorbers are provided in series in the exhaust flow downstream of the exhaust outlet and absorb energy of the exhaust gas. The exhaust gas is overheated to a first temperature by driving the combustion engine in a range of rotational speed producing hot exhaust gas at the exhaust outlet. The first temperature is sufficient to drive the at least two energy absorbers.Type: ApplicationFiled: November 19, 2008Publication date: December 8, 2011Applicant: Volvo Lastvagner ABInventors: Peter Märdberg Jozsa, Arne Andersson
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Patent number: 7416259Abstract: The invention relates to a method and an arrangement for mounting a wheel cap on a vehicle, the vehicle having rims with exposed fasteners for fastening to a wheel hub. The method includes mounting of a holder by fasteners of the rim, the holder having a first contact surface for resting against the rim and a second contact surface lying substantially parallel to and at a distance from the first contact surface, and where the mounting of the holder is done by at least two fasteners of the rims interacting with openings in the first contact surface of the holder. The method includes mounting of the wheel cap on the holder by a plurality of fasteners on the inner side of the wheel cap interacting with openings for the fasteners of the rim in the second contact surface of the holder.Type: GrantFiled: March 23, 2006Date of Patent: August 26, 2008Assignee: Volvo Lastvagner ABInventors: Ingemar Dagh, Anders Trygg
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Patent number: 7159486Abstract: A joint arrangement in a shift mechanism for a motor vehicle includes a coupling element cooperating with a gear shift lever, a mounting element joinable to a gear lever carrier, and a damping element arranged between the coupling element and the mounting element. The damping element includes cooperating first and second slide surfaces, which, by a relative movement, damp vibrations and substantially prevent vibrations from being transmitted between the mounting element and the coupling element.Type: GrantFiled: March 4, 2002Date of Patent: January 9, 2007Assignee: Volvo Lastvagner ABInventors: Torsten Thoreson, Marian Gruia
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Patent number: 6945235Abstract: Method and arrangement for enhancing exhaust gas recirculation efficiency on a combustion engine by providing a combustion engine having an exhaust system in fluid communication, via at least one juncture, with an exhaust gas recirculation system and locating a reflector in the exhaust system downstream of the at least one juncture. The reflector is adapted to reflect at least a portion of exhaust gas pressure pulses emitting from the combustion engine thereby causing a reflected pressure pulse to occur upstream of the reflector, and deflecting at least a portion of the reflected pressure pulse into the exhaust gas recirculation system thereby enhancing the efficiency of the exhaust gas recirculation system.Type: GrantFiled: August 28, 2003Date of Patent: September 20, 2005Assignee: Volvo Lastvagner ABInventors: Bert-Inge Bertilsson, Ivar Sahlén, Annika Carlsson
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Patent number: 6685203Abstract: An individual wheel suspension for vehicles built on a longitudinal frame and comprises a steering knuckle attachment, which at its lower, outer end is connected to and journalled in a wheel spindle. Also included is a pair of upper and lower torsion rod placed in the longitudinal direction of the vehicle and journalled in the steering knuckle attachment and a transverse section of the frame, to form a parallelogram. A transverse stabilizer bar is connected to the ends of one pair of the above corresponding torsion rod, which ends are facing away from the steering knuckle attachment and positioned on either side of the vehicle. The arrangement is also provided with a first shock absorber, placed between the lower end of the steering spindle attachment and the vehicle frame, as well as an adjustable suspension device, which connects the lower end of the steering spindle attachment and the vehicle frame.Type: GrantFiled: July 22, 2002Date of Patent: February 3, 2004Assignee: Volvo Lastvagner ABInventors: Jan-Olof Bodin, Stefan Petersen, Andreas Lundmark
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Patent number: 6544143Abstract: An engine brake application system for an internal combustion engine. The engine has at least one cylinder, at least one exhaust valve associated with the cylinder, and a rocker arm for activating the exhaust valve. The rocker arm is arranged on a hollow rocker shaft having a regulator responsive to an increase in oil pressured in the hollow rocker arm shaft and incorporated into the rocker arm for taking up clearance between the rocker arm ant the exhaust valve. To effect a reduction of engine speed during a gear shift, the system includes an actuator responsive to a signal generated in response to a need to effect a gear shift for rapidly increasing the oil pressure in the hollow rocker arm shaft to thereby effect valve clearance take-up.Type: GrantFiled: June 18, 2001Date of Patent: April 8, 2003Assignee: Volvo Lastvagner ABInventors: Sixten Berglund, Nils-Olof Håkansson
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Patent number: 6539926Abstract: A fuel delivery system having a fuel reservoir connected to a suction side of a pump, a fuel delivery line connected to an output side of the pump, a number of fuel injectors connected to the delivery line, and a return line from the injectors to the suction side of the pump. The pump has a housing, a pumping chamber within the housing, a driver rotor and a driven rotor within the pumping chamber, and an input shaft t the housing. The input shaft is arranged such that rotation of the input shaft effects rotation of the driver rotor. The driver rotor is caused to rotate by the input shaft via a magnetic coupling. The magnetic coupling is arranged to slip when a predetermined value of torque is applied across the coupling such that a maximum pressure value of about 12 bar is attained at the output side of the pump.Type: GrantFiled: May 11, 2001Date of Patent: April 1, 2003Assignee: Volvo Lastvagner ABInventors: Nils-Olof Hakansson, Jan Lindblom
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Patent number: 6422363Abstract: 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.Type: GrantFiled: September 5, 2000Date of Patent: July 23, 2002Assignee: Volvo Lastvagner ABInventors: Ronald Olsson, Sverker Alfredsson
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Patent number: D820742Type: GrantFiled: February 8, 2017Date of Patent: June 19, 2018Assignee: Volvo LastvagnerInventor: Lukas Yates