Knorr-bremse Systeme Fuer Nutzfahrzeuge Gmbh

Bendix Commercial Vehicle Systems LLC

Gilles Hebrard

Joerg Mellar

Jean-Baptiste Marescot

Thomas Weinhold

Edward F Hoban

David D Colavincenzo

Jeffrey Geither

Royal Ricky Rodrigues

Nicholas Petek

Olivier Herbiet

Thomas J Franz

Justin R Huffman

Jessica H Mosier

Engelbert Koeck

Michel Rigal

Wolfgang Kiener

Michel Saintive

Jörg Mellar

An apparatus is provided for controlling a vehicle air compressor having compressor oil to track water content in the compressor oil due to condensation during operation of the compressor over a plurality of time intervals. The apparatus comprises a data storage unit arranged to store a condensation control algorithm. The apparatus also comprises a processing unit arranged to apply the condensation control algorithm to calculate a net rate of condensation of water in the compressor oil during operation of the compressor over a first time interval of the plurality of time intervals, and maintain a running total of how much water is in the compressor oil at any given time over the first time interval to enable the compressor to operate in different modes of operation based upon the running total of how much water is in the compressor oil.

Apparatus and method for controlling a vehicle air compressor to track water content in compressor oil

A screw compressor for a utility vehicle has at least one female screw, at least one male screw that meshes with the female screw, and at least one screw compressor drive which drives the female screw.

Screw compressor for a utility vehicle

A screw compressor for a utility vehicle includes at least one housing, at least one housing cover and at least one rotor housing. At least one seal is provided, wherein, when assembled, there is an oil sump in the housing, and the seal is arranged between the housing cover and the rotor housing and projects out of the oil sump with respect to the assembled state. The seal is formed as a sealing plate and has multiple passage openings.

A screw compressor for a utility vehicle includes at least one housing and at least one air-oil separator holder arranged at the housing. The air-oil separator holder is manufactured from a non-corrosive material. A relief valve is provided, which is arranged in the air-oil separator holder and by which the interior of the screw compressor can be relieved of pressure.

Oil separator and relief valve of a screw compressor for a utility vehicle

A screw compressor for a utility vehicle has at least one housing with at least one housing cover and with at least one rotor housing, at least one baffle plate and at least one seal. In the assembled state, an oil sump is present in the housing, wherein, with regard to the assembled state, the seal is arranged between housing cover and rotor housing and projects out of the oil sump. The seal at least partially separates the interior of the housing cover from the interior of the rotor housing. With regard to the assembled state, in the case of a substantially horizontal orientation of the screw-type compressor and in the case of a substantially horizontal orientation of the oil sump, the baffle plate is oriented substantially parallel to the upper level of the oil sump.

Screw-type compressor for a utility vehicle

A screw compressor for a utility vehicle includes a housing. The housing is filled with oil. At least one pair of compressor screws are mounted in the housing and serve to compress air supplied to the screw compressor. In the assembled state, a heat exchanger is directly placed onto and installed on the housing, by which heat exchanger the temperature of the oil contained in the housing can be controlled.

A screw compressor system for a utility vehicle includes at least one screw compressor and at least one control and/or regulation unit for controlling and regulating the screw compressor. The control and/or regulation unit is designed such that the screw compressor is prevented, for a determined period of time, from re-starting after being stopped.

A compressor has a crankcase in which a crankshaft is rotatably mounted in a crankspace. The crankcase contains at least one cylinder space in which a piston, mounted eccentrically on the crankshaft by way of a connecting rod, can be driven in reciprocating motion. The crankshaft is connected, via a gearing having a modulus m, to a drive source, wherein the gear wheel arranged on the crankshaft engages with the gear wheel on the drive source. The axis of rotation of the crankshaft is offset with respect to the center axis of the cylinder space by an amount dl which is a whole multiple of m/2. The center axis of the cylinder space is understood as the axis which proceeds from the center point of the base area of the cylinder space, perpendicular to this base area, and along which the piston moves. This makes it possible to change the transmission ratio of the gearing within an advantageous range, without it being necessary to undertake modifications to the external dimensions of the compressor or to the motive source. Depending on the transmission ratio, it is possible to reduce the operating noise of the compressor or to increase the air capacity.

Compressor with adaptable transmission with respect to the motive source

An arrangement has a housing, which has a receptacle or an opening, and a cylindrical insert, which is mounted in the receptacle or opening via at least one interference fit. The insert has a peripheral groove, and therefore the insert is both fastened against the housing and sealed against the housing in a liquid- and/or gas-tight manner by way of material of the insert and/or housing that has been pressed into the groove during the assembly. The material of the insert and/or of the housing is displaced in the case of an interference fit. The groove provides a defined location to which the material can preferably flow. After the assembly has been concluded, the insert is locked against the housing by the material located in the groove. At the same time, the material acts as a seal between the insert and the housing. A separate seal in the region of the press fit becomes dispensable.

Housing having a cylindrical insert sealed against the housing

A crankcase assembly for a reciprocating machine is provided in which a crankcase having at least one cylinder with a wet cylinder liner arranged therein. A cylinder head for charging and discharging pressurized gas is mounted on the crankcase and a cylinder head gasket for preventing leakage of pressurized gas out of the cylinder is arranged between the crankcase and the cylinder head and is running circumferentially spaced from the inner wall of the cylinder liner. A circumferential coolant channel is formed between the inner crankcase wall and an outer wall of the cylinder liner, wherein a lower sealing means is arranged between the inner crankcase wall and the cylinder liner on the crankshaft side of the coolant channel for preventing leakage of coolant fluid. An upper sealing means is arranged between the inner crankcase wall and the cylinder liner on the cylinder head side of the coolant channel for preventing leakage of coolant fluid.

Crankcase assembly for a reciprocating machine

A compressor crankcase assembly is provided for an air compressor. In one example, a compressor crankcase assembly includes a crankcase made of a material comprising at least 50% by weight aluminum and a crankcase liner disposed within the crankcase. The crankcase has a protrusion that is at least partially disposed within the groove of the crankcase liner.

Lightweight compressor crankcase assembly and method

A clutch actuator controlled by a pressure medium, in particular for a compressor clutch of a commercial vehicle has an actuating piston displaceably disposed in a housing in an axial direction. An end of the actuating piston is supported in the axial direction on an elastic membrane, sealing a first region of the housing off from a second region of the housing. The elastic membrane includes a raised area on the side opposite the actuating piston. The clutch actuator can be used in a compressor clutch for a commercial vehicle.

Clutch actuator controlled by a pressure medium for a compressor clutch of a commercial vehicle

A compressor system and method of operating same are provided for the compressed air supply of a commercial vehicle, wherein the compressor system includes a compressor for compressed air generation, a transmission for transmitting torque from a drive motor to the compressor, a clutch for disconnecting the connection between compressor and drive motor, and a control unit for opening and closing the clutch. The control unit is capable of opening the clutch in the event a settable maximum allowed compressor speed or motor speed of the drive motor is exceeded and to close the open clutch temporarily when the motor speed is greater than the maximum allowed motor speed.

Compressor and method for controlling a compressor for the compressed air supply of a commercial vehicle

A compressor system supplies compressed air to a commercial vehicle. The compressor system includes a compressor, a clutch, and a hydraulic pump and can be driven by way of a drivetrain. The compressor can be completely disconnected from a driving engine by way of the clutch. The drivetrain encompasses a geared drive mechanism which allows the hydraulic pump to be driven, and the clutch is arranged between the geared drive mechanism and the compressor. A method for operating the compressor system is provided.

Compressor system for supplying compressed air to a commercial vehicle, and method for operating the compressor system

An air compressor of a pneumatic system in a vehicle includes a piston pump that is fitted with at least one piston and a crankshaft which are located in a crankcase. At least part of the crankcase is cast from aluminum and includes an integrally formed coolant duct.

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Caen, France

Gilles Hebrard