US 6,584,787 B1Granted

Arrangement and method for controlling a compressor of an airconditioning arrangement in a motor vehicle

AssigneeScania CV AB (publ)

InventorsAke Ryblad, Tord Jonsson, Olle Kwarnmark

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Abstract

An arrangement and a method for controlling a compressor of an airconditioning arrangement for a motor vehicle, whereby the compressor is optionally driven through activation of a clutch arrangement. The compressor has an input shaft which, via a first wobble plate, acts through bearing elements on a second wobble plate. The second wobble plate is arranged to transmit a wobbling motion designed to drive pistons of a number of compressor units of the piston and cylinder type. A control circuit is designed for brief activation of the clutch arrangement at selected times to cause periodic movement of the bearing elements. The control circuit may be activated by the vehicle starter motor, the reverse gear or a timing circuit.

Claims17

Dependent claims

An apparatus for controlling a compressor of an air conditioning system, the apparatus comprising:

a compressor, a rotatable input shaft connected with the compressor such that rotation of the shaft operates the compressor, a drive to the input shaft for rotating the input shaft;
a clutch arrangement between the drive and the input shaft wherein the clutch arrangement may be activated to connect the drive to the input shaft for rotating the input shaft and the clutch arrangement may be deactivated for disconnecting the drive from the input shaft;
a first wobble plate connected with the input shaft for being rotated by the input shaft;
the first wobble plate being inclined with respect to the input shaft;
a second wobble plate at the first wobble plate, the second wobble plate being non-rotatable with respect to the rotatable first wobble plate and the second wobble plate being inclined with respect to the input shaft, being correspondingly inclined to the first wobble plate, and being positioned and operable to drive pistons of piston-cylinder type compressor units as the inclined first wobble plate rotates which causes incline of the second wobble plate in correspondence with the incline of the first wobble plate;
bearing elements between the rotatable first wobble plate and the non-rotatable second wobble plate enabling rotation of the first wobble plate relative to the first wobble plate;
a control circuit connected with the clutch arrangement, the control circuit being operable to activate the clutch arrangement at selected time intervals for rotating the first wobble plate with respect to the second wobble plate which causes action of the bearing elements between the first and second wobble plates.

4 more elements

A vehicle comprising:

an engine for driving the vehicle, a drive shaft from the engine;
an air conditioning system for the vehicle, the air conditioning system including a compressor;
a rotatable input shaft connected with the compressor such that rotation of the input shaft operates the compressor;
a clutch arrangement between the drive shaft and the input shaft wherein the clutch arrangement may be activated to connect the drive shaft to the input shaft for rotating the input shaft and the clutch arrangement may be deactivated for disconnecting the drive shaft from the input shaft;
a first wobble plate connected with the input shaft for being rotated by the input shaft;
the first wobble plate being inclined with respect to the input shaft;
a second wobble plate at the first wobble plate, the second wobble plate being non-rotatable with respect to the rotatable first wobble plate, being inclined with respect to the input shaft, being correspondingly inclined to the first wobble plate, and being positioned and operable to drive pistons of piston-cylinder type compressor units as the first inclined wobble plate rotates which causes incline of the second wobble plate in correspondence with the incline of the first wobble plate;
bearing elements between the rotatable first wobble plate and the non-rotatable second wobble plate enabling rotation of the first wobble plate relative to the first wobble plate;
a control circuit connected with the clutch arrangement, the control circuit being operable to activate the clutch arrangement at selected time intervals for rotating the first wobble plate with respect to the second wobble plate which causes action of the bearing elements between the first and second wobble plates.

6 more elements

Dependencies are inferred from the claim text.