Motor vehicle air spring system having a tire-fill connection
First Claim
1. A method for filling a tire of a spare wheel utilizing an air supply unit of an air spring system of a motor vehicle equipped with a tire filling system including a tire-fill connection unit and a fill unit, the arrangement comprising:
- in a fault-free condition, changing the logic states of the inputs (32a, 32b) of a reed switch connected to a control apparatus from low/high to high/low when said tire-fill connection unit is attached;
in a fault-free condition, changing the logic states of the inputs (32a, 32b) from high/low to low/high when disconnecting said tire-fill connection unit;
said control apparatus functioning to detect high/high and, when said high/high is detected, then concluding either the third input (32c) has undergone a short circuit to positive or the second input (32b) has undergone a line interruption (or short circuit to positive) which cannot be diagnosed when said tire-fill connection unit is not attached; and
, said control apparatus functioning to detect low/low and, when said low/low is detected, then concluding that either the second input (32b) or the third input (32c) has a short circuit to ground which can be diagnosed when said tire-fill connecting unit is not mechanically attached and the fill operation can be started when only one of said first and second inputs (32a, 32b) changes its logic state.
1 Assignment
0 Petitions
Accused Products
Abstract
In a motor vehicle equipped with air springs, the compressor of the level control system is used to inflate a spare wheel. For this purpose, the air spring arrangement of the motor vehicle is equipped with a tire-fill device which includes the fill unit (20) and a tire-fill connection unit (4). A filling of a reserve tire is ensured even when there is an electric fault in the level control system. The tire-fill connection unit (4) includes an air supply connection (6), a proximity switch (8), an electric sensor connection (10) and a pneumatic connection (12) for rapid coupling and valve connection. The proximity switch (8) includes a reed contact (28) which includes three terminals (32a, 32b, 32c) which are connected to a control apparatus (34). An operator-manipulated component (14) has a pneumatic valve connection (16) and a permanent magnet (18) and is connected to the pneumatic connection (12) for a rapid coupling and valve connection. The permanent magnet (18) excites the reed contact (28) to switch when the component (14) is attached or connected to the tire-fill connection unit (4).
8 Citations
9 Claims
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1. A method for filling a tire of a spare wheel utilizing an air supply unit of an air spring system of a motor vehicle equipped with a tire filling system including a tire-fill connection unit and a fill unit, the arrangement comprising:
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in a fault-free condition, changing the logic states of the inputs (32a, 32b) of a reed switch connected to a control apparatus from low/high to high/low when said tire-fill connection unit is attached;
in a fault-free condition, changing the logic states of the inputs (32a, 32b) from high/low to low/high when disconnecting said tire-fill connection unit;
said control apparatus functioning to detect high/high and, when said high/high is detected, then concluding either the third input (32c) has undergone a short circuit to positive or the second input (32b) has undergone a line interruption (or short circuit to positive) which cannot be diagnosed when said tire-fill connection unit is not attached; and
,said control apparatus functioning to detect low/low and, when said low/low is detected, then concluding that either the second input (32b) or the third input (32c) has a short circuit to ground which can be diagnosed when said tire-fill connecting unit is not mechanically attached and the fill operation can be started when only one of said first and second inputs (32a, 32b) changes its logic state. - View Dependent Claims (2, 3)
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4. An arrangement for filling the tire of a spare wheel in a motor vehicle equipped with an air spring system having an air supply unit, the arrangement comprising:
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a tire-fill connection unit having an air supply connection connectable to said air supply unit;
a fill unit having an input connected to said tire-fill connection unit and an output connectable to the tire to be filled;
said tire-fill connection unit including a proximity switch and a reed switch operatively connected to said proximity switch;
a control apparatus;
said reed switch having first, second and third inputs (32a, 32b, 32c) connected to said control apparatus; and
,(a) said reed switch functioning in a fault-free condition to change the logic states of the first and second inputs (32a, 32b) thereof from low/high to high/low when said tire-fill connection unit is attached;
(b) said reed switch functioning in a fault-free condition, to change the logic states of the first and second inputs (32a, 32b) from high/low to low/high when disconnecting said tire-fill connection unit;
(c) said control apparatus functioning to detect high/high and when said high/high is detected, then either the third input (32c) has undergone a short circuit to positive or the second input (32b) has undergone a line interruption (or short circuit to positive) which cannot be diagnosed when said tire-fill connection unit is not attached; and
,(d) said control apparatus functioning to detect low/low, then either the second input (32b) or the third input (32c) has a short circuit to ground which can be diagnosed when said tire-fill connection unit is not mechanically attached and the fill operation can be started when only one of two first and second inputs (32a, 32b) changes its logic state. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification