Abstract: A method is provided for repairing a single crystal turbine blade, which includes an airfoil with a tip having a tip cover plate, tip cooling air holes and a tip crown. The method includes removing the tip crown by manual grinding, thereby preserving the underlying tip cover plate; preparing the tip cooling air holes by manual grinding; closing said prepared tip cooling air holes by manual welding; and building-up a new tip crown by a LMF (Laser Metal Forming) process.

Abstract: A method for controlling an active suspension system of a vehicle during a curb parking operation, so as to position a portion of the vehicle on a street and a portion of the vehicle on a curb. The method includes steps of activating a curb parking function of the active suspension system, acquiring inputs pertinent to the curb parking operation, and determining, by a controller, if a curb parking operation is feasible for the vehicle. If a curb parking operation is deemed infeasible, an operator of the vehicle is notified that the curb parking operation is infeasible. If a curb parking operation is deemed feasible, actuatable elements of the active suspension system are controlled to facilitate curb parking.

Abstract: Systems and methods for automatically evaluating the useful life of an engine oil based on data corresponding to a plurality of preselected key oil properties. The evaluation includes determining, in connection with each of the pre-selected key oil properties, a first current measured oil property value, a first reference oil property value, a first deterioration-limit value, and a first weighting factor. The evaluation also includes determining a single index value, indicating a state of deterioration of the engine oil, in a calculation using each of the values and factors.

Abstract: A method for controlling a suspension system of a vehicle, as well as suspension systems, and a vehicle including a suspension system is provided. The suspension system may include at least one adjustable damping device that is controlled via a control signal, such as from a controller of the suspension system, in order to dynamically adjust the damping characteristic of the damping device. The control signal may be generated on the basis of at least one of current driving dynamics data and optically recorded information about an area of a ground surface.

Abstract: The invention concerns a device for a vehicle, for height adjustment of a vehicle superstructure, which at one end has a first means for pivoting on a sprung mass (2) of the vehicle and at the other end a second means for pivoting on an unsprung mass (3) of the vehicle, a vibration damper (4) damping a relative movement of the sprung mass and unsprung masses (2, 3), and a self-pumping air spring (5) which supports the sprung and unsprung masses (2, 3) against each other in a sprung fashion. The vibration damper (4) according to the invention has a damping characteristic which is adjustable during operation, preferably steplessly adjustable. The invention also concerns a method for height adjustment of a vehicle superstructure by means of such a device.

Abstract: A vehicle suspension apparatus includes various elements, such as a self-pumping air spring and damper unit operating with compressed air for height adjustment of a vehicle body relative to a wheel suspension of a vehicle. The apparatus further includes at least one spring space filled with compressed air, which is at least partially bounded by at least one movable wall and a damper cylinder, which can be connected to the spring space for fluid transmission by at least one connecting valve. The damper cylinder includes a working space divided by a piston, which moves inside the working space, and fluidly connected by a throttle valve. The connecting valve and the throttle valve are each switchable valves, and one of the working spaces of the damper cylinder can be vented to the surrounding atmosphere via at least one switchable vent valve.

Abstract: A method is provided for repairing a single crystal turbine blade, which includes an airfoil with a tip having a tip cover plate, tip cooling air holes and a tip crown. The method includes removing the tip crown by manual grinding, thereby preserving the underlying tip cover plate; preparing the tip cooling air holes by manual grinding; closing said prepared tip cooling air holes by manual welding; and building-up a new tip crown by a LMF (Laser Metal Forming) process.

Abstract: A wheel bearing unit comprises an inner ring and an outer ring. The outer ring is mounted rotatably and is arranged concentrically with respect to the inner ring. The inner ring serves to receive a wheel and the outer ring serves for fastening to a wheel support of a motor vehicle. The wheel bearing unit has, between the inner ring and the outer ring, a first ball row and a second ball row which is arranged parallel to the first ball row. A follower is arranged in a rotationally fixed manner with respect to an outer side of the inner ring between the first ball row and the second ball row. The follower is connected directly or indirectly to a rotor of an electric machine in a torque-transmitting manner.

Abstract: A method for estimating a location of a center of gravity (CG) of a sprung mass of a vehicle includes steps of a) determining whether the vehicle is stationary or moving; b) if the vehicle is stationary, calculating estimated x and y coordinates of the CG; c) storing the estimated coordinates in memory; and d) repeating steps a)-c) until the vehicle is no longer stationary.

Abstract: A method for controlling an active suspension system of a vehicle during a curb parking operation, so as to position a portion of the vehicle on a street and a portion of the vehicle on a curb. The method includes steps of activating a curb parking function of the active suspension system, acquiring inputs pertinent to the curb parking operation, and determining, by a controller, if a curb parking operation is feasible for the vehicle. If a curb parking operation is deemed infeasible, an operator of the vehicle is notified that the curb parking operation is infeasible. If a curb parking operation is deemed feasible, actuatable elements of the active suspension system are controlled to facilitate curb parking.

Abstract: A method for estimating a location of a center of gravity (CG) of a sprung mass of a vehicle includes steps of a) determining whether the vehicle is stationary or moving; b) if the vehicle is stationary, calculating estimated x and y coordinates of the CG; c) storing the estimated coordinates in memory; and d) repeating steps a)-c) until the vehicle is no longer stationary.

Abstract: A vehicle can have a vibration damping system, which has a characteristic curve that is adjustable. To control the characteristic curve of the vibration damping system, information regarding a profile of a road surface in front of the vehicle is detected. At least a portion of the road surface profile can be classified according to a change in height and a length of the portion. The classification can be based on the detected information. Based on the classification of the road surface profile, the characteristic curve of the vibration damping system of the vehicle can be adjusted.

Abstract: A method for controlling a vehicle includes the step of determining if a curb parking operation is feasible for the vehicle. If a curb parking operation is deemed infeasible, an operator of the vehicle is notified that curb parking is infeasible. If a curb parking operation is deemed feasible, actuatable elements of the vehicle are controlled to facilitate the curb parking operation.

Abstract: A wheel suspension unit is disclosed. The wheel suspension unit includes a stabilizer having a first end and a second end, a wheel suspension element, and a piston-cylinder unit. The piston-cylinder unit connects an end of the stabilizer to the wheel suspension element. The piston-cylinder unit is a roll damper. The roll damper includes a plurality of roll damping valves arranged in a piston of the roll damper. Each of the plurality of roll damping valves has a non-return valve and an adjustable throttle valve. The non-return valve is arranged in series with the adjustable throttle valve.

Abstract: A method for controlling a vehicle includes the step of determining if a curb parking operation is feasible for the vehicle. If a curb parking operation is deemed infeasible, an operator of the vehicle is notified that curb parking is infeasible. If a curb parking operation is deemed feasible, actuatable elements of the vehicle are controlled to facilitate the curb parking operation.

Abstract: A wheel bearing unit comprises an inner ring and an outer ring. The outer ring is mounted rotatably and is arranged concentrically with respect to the inner ring. The inner ring serves to receive a wheel and the outer ring serves for fastening to a wheel support of a motor vehicle. The wheel bearing unit has, between the inner ring and the outer ring, a first ball row and a second ball row which is arranged parallel to the first ball row. A follower is arranged in a rotationally fixed manner with respect to an outer side of the inner ring between the first ball row and the second ball row. The follower is connected directly or indirectly to a rotor of an electric machine in a torque-transmitting manner.

Abstract: The invention concerns a device for a vehicle, for height adjustment of a vehicle superstructure, which at one end has a first means for pivoting on a sprung mass (2) of the vehicle and at the other end a second means for pivoting on an unsprung mass (3) of the vehicle, a vibration damper (4) damping a relative movement of the sprung mass and unsprung masses (2, 3), and a self-pumping air spring (5) which supports the sprung and unsprung masses (2, 3) against each other in a sprung fashion. The vibration damper (4) according to the invention has a damping characteristic which is adjustable during operation, preferably steplessly adjustable. The invention also concerns a method for height adjustment of a vehicle superstructure by means of such a device.

Abstract: A vehicle suspension apparatus includes various elements, such as a self-pumping air spring and damper unit operating with compressed air for height adjustment of a vehicle body relative to a wheel suspension of a vehicle. The apparatus further at least one spring space filled with compressed air, which is at least partially bounded by at least one movable wall and a damper cylinder, which can be connected to the spring space (8) for fluid transmission by at least one connecting valve. The damper cylinder includes a working space divided by a piston, which moves inside the working space, and fluidly connected by a throttle valve. The connecting valve and the throttle valve are each switchable valves, and one of the working spaces of the damper cylinder can be vented to the surrounding atmosphere via at least one switchable vent valve.

Abstract: Systems and methods for automatically evaluating the useful life of an engine oil based on data corresponding to a plurality of preselected key oil properties. The evaluation includes determining, in connection with each of the pre-selected key oil properties, a first current measured oil property value, a first reference oil property value, a first deterioration-limit value, and a first weighting factor. The evaluation also includes determining a single index value, indicating a state of deterioration of the engine oil, in a calculation using each of the values and factors.

Abstract: A method and system for operating a motor vehicle is described. In one example, spring rates for suspension springs and damping rates for shock absorbers are adjusted in response to vertical acceleration, longitudinal angular acceleration, and lateral angular acceleration of a vehicle body in the absence of accelerometers. The system and method may improve vehicle driving dynamics and lower system cost as compared to other systems.