Method for controlling the regeneration cycles for an air dryer in a closed ride control system for vehicles

Abstract

The invention relates to a method for controlling the regeneration cycles for an air dryer (10) in a closed ride control system for vehicles, by which a vehicle body is suspended relative to at least one vehicle axle, having compressed air chambers (6a - 6d) connected to a compressed air line by means of branch lines (38a - 38d), a compressor (8), an air dryer (10) disposed at a compressed air line (4) to a compressed air reservoir tank (12) connected to the pressurizing medium chambers (6a - 6d) such that compressed air can be transferred from the compressed air reservoir tank (12) into each pressurizing medium chamber (6a - 6d), pressurizing medium can be transferred from each pressurizing medium chamber (6a - 6d) into the pressurizing medium reservoir tank (12), wherein the compressed air chamber (6a - 6d) and the compressed air reservoir tank (12); can be filled with compressed air and vented via a compressed air line (32) that can be connected to atmosphere, or can be filled via a compressed air suction line (5) connected to the compressor (8) and vented via the compressed air line (32), the amount of compressed air delivered by means of the compressor (8) through the dryer (10) is measured, the temperature and / or the humidity of the air drawn from the atmosphere is measured, as much compressed air as necessary is continuously fed through the air dryer (10) such that said air can be considered to be saturated under the assumption that the air having the highest potential ambient temperature and humidity is drawn through the compressor (8) and delivered through the air dryer (10), the amount of regeneration air required for the air dryer for said amount of compressed air in order to achieve the desired dew point is determined as a function of the ambient temperature and / or humidity of the indrawn air, and the regeneration of the dryer (10) is performed using said amount of regeneration air.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 for controlling the regeneration cycle of an air dryer in a closed ride height adjustment system of a vehicle by which the vehicle body is positioned relative to the at least one axle is suspended. Background technique [0002] Closed ride height adjustment systems for vehicles of the type mentioned at the outset are known from European patent application EP 1 243 447 A2 and German patent DE 102 31 251 C1. The closed ride height adjustment systems known from these publications have two or four controllable directional valves, a pressure medium reservoir and at least two pressure medium chambers each with a controllable directional valve. Via the ride height adjustment system, pressure medium can be diverted from the pressure medium chamber into the pressure medium storage container and from the pressure medium storage container into the pressure medium chamber. In addition, air ca...

AI Technical Summary

Problems solved by technology

[0011] With the systems and methods known from the prior art, an optimized regeneration cycle is sought to be generated, but said regeneration cycle cannot be transferred without problems to closed pneumatic systems, especially pneumatic ride height adjustment systems, because in closed The air conveyed in the system is only discharged in proportion, while due to the operating mode of the system there must always be compressed air in the system and nevertheless a sufficient dew point must be guaranteed

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