JPH0228084Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a kneeling device that performs kneeling by removing air from a bellows for an air spring.

Air suspension vehicles use air spring bellows that expand and contract to maintain a constant vehicle height. In such air suspension vehicles, a kneeling device has been put into practical use that lowers the vehicle height on the entrance/exit side by removing air from the bellows to make it easier for passengers to board and exit the vehicle at stops and the like. However, since the vehicle body of a vehicle equipped with this kneeling device tilts during kneeling, the vehicle may run in this state.

An object of the present invention is to provide a kneeling device that does not perform a kneeling operation even if the vehicle is running even slightly.

An embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 shows a kneeling device 10 for an air suspension vehicle according to the present invention. only bellows 12 are shown);
The kneeling device 10 closes the kneeling means 14 and the kneeling switch 16 to remove air from one bellows 12 on the entrance/exit side.
control means 1 for electrically controlling the operation of 4;
It consists of 8. The left and right bellows 12 are connected to an air supply source (not shown) via a leveling valve 20 that opens and closes in response to changes in vehicle height. Normally, this leveling valve 20 supplies air so that a constant vehicle height is always maintained. is absorbed and expelled.

The kneeling means 14 consists of an electromagnetic cut valve 22 provided between one of the bellows 12 on the entrance/exit side and the leveling valve 20, and an electromagnetic exhaust valve 24 connected between the electromagnetic cut valve 22 and the bellows 12. . The control means 15 controls the electromagnetic cut valve 22 to be closed and the electromagnetic exhaust valve 24 to be opened by closing the kneeling switch 16.

In the above embodiment, the cut valve 22 and the exhaust valve 24 are electromagnetic type, but they may be pneumatic type or other types.

The kneeling device of the present invention further includes a vehicle speed detector 26 for detecting the vehicle speed of the air suspension vehicle, and this vehicle speed detector 26 is connected to the control means 18 to supply a vehicle speed signal to the control means. When the control means 18 receives a vehicle speed signal other than zero from the vehicle speed detector 26, it controls the kneeling means 14 so that the kneeling means 14 is not driven and does not perform a kneeling operation even if the kneeling switch 16 is closed. . That is, when receiving a vehicle speed signal other than zero from the vehicle speed detector 26, the control means 18
is controlled so that the cut valve 22 of the kneeling means 14 is not shut off and the exhaust valve 24 is not vented.

Therefore, in the above device, if the vehicle is traveling even slightly and a non-zero vehicle speed signal is supplied to the control means 18, the kneeling means 14 will not be driven, and therefore the vehicle will not be able to lean. can.

According to the present invention, as mentioned above, when the vehicle is running even slightly, the cut valve of the kneeling means does not shut off and the exhaust valve does not release air, so the kneeling operation is not performed and the vehicle body leans. will not occur. In this case, since the kneeling means is provided independently of the leveling valve, normal vehicle height adjustment by the leveling valve is performed regardless of the presence or absence of the kneeling operation.

[Brief explanation of drawings]

The drawing is a schematic system diagram of a kneeling device according to the present invention. 10... Kneeling device, 12... Bellows for air spring, 14... Kneeling means, 1
6... Kneeling switch, 18... Control means,
22... Electromagnetic cut valve, 24... Electromagnetic exhaust valve, 26... Vehicle speed detector.

Claims (1)

[Scope of utility model registration request] An air suspension system consisting of left and right bellows for air springs to which air is supplied from an air supply source through a leveling valve.The air suspension is provided between one bellows for an air spring on the entrance/exit side of an air suspension vehicle and the leveling valve. A kneeling device comprising a kneeling means comprising a cut valve and an exhaust valve for extracting air from one of the bellows, and a control means for electrically controlling the kneeling means so as to operate when a kneeling switch is closed. further comprising a vehicle speed detector that detects the vehicle speed of the vehicle and supplies a vehicle speed signal to the control means, and the control means shuts off the cut valve of the kneeling means when receiving a vehicle speed signal other than zero from the vehicle speed detector. A kneeling device characterized in that the kneeling device is controlled so as not to perform air removal from the exhaust valve.