54 results about "Central tire inflation system" patented technology

A central tire inflation system for an agricultural implement that is linked to a work vehicle for movement in a field. The central tire inflation system includes a database of soil conditions corresponding to location, an implement load sensor, a location determiner, a processor, and tire inflation controller. The processor determines the proper inflation of implement tires based on factors including the soil conditions and implement load.

The present invention is a central tire inflation system and a valve for use in the system including a casing securable to the rim of a vehicle in communication with the tire that houses a main body connectable to a pressurized fluid supply of the central tire inflation system, and a valve member moveable within the main body to control the flow of air through the valve. The valve can be mounted flush on the exterior surface of the rim or in a recessed position within the rim, and can be connected to a manifold that is able to control the flow of pressurized fluid from the central tire inflation system to each valve and tire connected to the valve. The operation of the manifold and pressurized fluid supply can be controlled utilizing a controller operably connected to the manifold and fluid supply.

The present invention is a valve for use in a central tire inflation system including a casing securable to the rim of a vehicle in communication with the tire that houses a main body connectable to a pressurized fluid supply of the central tire inflation system, and a valve member moveable within the main body to control the flow of air through the valve. The valve can be mounted flush on the exterior surface of the rim or in a recessed position within the rim, and can be connected to a manifold that is able to control the flow of pressurized fluid from the central tire inflation system to each valve and tire connected to the valve. The operation of the manifold and pressurized fluid supply can be controlled utilizing a controller operably connected to the manifold and fluid supply, and to sensing devices in the valve that supply information regarding the operational conditions of the vehicle to the controller to assist in adjusting the inflation of the tires as necessary.

The present invention is a valve for use in a central tire inflation system including a casing securable to the rim of a vehicle in communication with the tire that houses a main body connectable to a pressurized fluid supply of the central tire inflation system, and a valve member moveable within the main body to control the flow of air through the valve. The valve can be mounted flush on the exterior surface of the rim or in a recessed position within the rim, and can be connected to a manifold that is able to control the flow of pressurized fluid from the central tire inflation system to each valve and tire connected to the valve. The operation of the manifold and pressurized fluid supply can be controlled utilizing a controller operably connected to the manifold and fluid supply.

A valve assembly for a central tire inflation system is provided. The valve assembly includes a first housing having a first port connected to a second port via a cavity. The second port is in fluid communication with a wheel assembly. A biasing member is disposed in the cavity adjacent a first perforation formed in the first housing. A valve member is contacted by the biasing member. The valve member includes a first portion having an outer surface which is unbroken adjacent an end to allow a pressurized fluid to flow around it. The first portion reduces in diameter toward the end.

A controller for a motor vehicle central tire inflation system. The controller causes the system to operate in a selected one of a plurality of operating modes that include a leakage assist mode in which the controller causes the system to inflate the tires to predetermined leakage assist pressure value. The controller is configured automatically to cause the system to assume the leakage assist mode in dependence at least in part on a first pressure signal indicative of the pressure of one or more tires, wherein when the system determines that a tire is suffering leakage the system is configured to establish a gas flow path between the tire and a remote pressure sensor and to measure a pressure of gas in the tire by means of the remote pressure sensor by reference to a second pressure signal indicative of a pressure measured by the remote pressure sensor.

A method for control of a tire pressure management system (or central tire inflation system) is provided which enables active adaptation of control variables in the system in response to variations in air line volume. The air line volume in a conduit between an air source and a vehicle tire is determined. Subsequently, one or more values for control variables are adjusted in response to the air line volume and various parameters associated with the system are determined in response to the adjusted values of the control variables.

A central tire inflation system (CTIS) for a vehicle includes a reservoir for supplying air to the vehicle tires, a pressure sensor for monitoring air pressure in the reservoir, a compressor for supplying compressed air along a first flow path to the reservoir, a compressor timer for monitoring the run-time of the compressor, a dryer disposed on the first flow path for drying air supplied by the compressor, a purging system for routing air through the dryer along a second flow path to purge liquid from the dryer, and a controller for controlling the flow of air in the CTIS. The controller is configured: to activate the compressor in response to a request for a compressor operation, after which operation the air in the reservoir is at a post-operation pressure; when the compressor operation is complete, to determine a compressor activation period, and to determine if the compressor activation period is greater than or equal to a target period; and if the compressor activation period is less than the target period, to keep the compressor activated until pressure in the reservoir increases to a base target pressure greater than the post-operation pressure; and if the compressor activation period is greater than or equal to the target period, to keep the compressor activated until pressure in the reservoir increases to an elevated target pressure higher than the base target pressure and to activate the purging system to route air from the reservoir to purge the dryer of liquid.

A control system for a motor vehicle includes a central tire inflation system (CTIS) electronic controller, the CTIS controller being configured to control the CTIS to cause inflation and deflation of one or more tires, the CTIS controller being configured to cause the CTIS to operate in a selected one of a plurality of operating modes in each of which the system is configured to set a pressure of one or more tires of the vehicle to a predetermined tire pressure value, the CTIS controller being configured to receive data indicative of a type of tire fitted to the vehicle, the controller being configured to prevent operation in a predetermined at least one of the plurality of operating modes in dependence on the data indicative of tire type.

A filter device (7, 8) for a conduit (9, 10) comprises a gas-permeable pre-filter element (21, 23) and a gas-permeable, liquid-impermeable filter element (22, 24). The filter device (7, 8) is configured to be fluidly coupled to a conduit (9, 10) such that a gas can be caused to flow, in sequence, through the pre-filter element (21, 23), the filter element (22, 24) and then the conduit (9, 10). Such a filter device (7, 8) can for example be used in each of a vehicle hollow driveshaft (2) and a hollow wheel stub axle (6) forming a CV joint (11) having a compressed air supply line which passes therethrough, as is the case in some central tyre inflation systems (CTISs). Thus, compressed air can be supplied via said air supply line without the need for an additional fluid transfer device fluidly connecting the driveshaft and the stub axle's conduits (9, 10).

A flow indication system for a central tire inflation system is provided. The flow indication system provides a venturi in fluid communication with the conduit providing air to a tire. A pressure reading is taken at the inlet and throat of the venturi and the air flowing through the venturi is calculated based on the pressure differential. According to some embodiments, the pressure readings are provided to a microcontroller that uses a table and interpolation algorithms to calculate the flow of the air flowing through the venturi, such as the mass of air in a given unit of time (grams/second for example). In one embodiment, two separate pressure sensors are coupled to different ends of a narrowed orifice that causes a pressure change in the flow as flow rate increases in the throat of the sensor. This pressure change is then used to calculate a proportional flow that can then be broadcast to various parties instead of an on/off reading.

An exemplary system for controlling air pressure in a tire of a vehicle includes an air transfer ring assembly including a reservoir member, a cover member, a first air transfer member, a second air transfer member, and a sealing member configured to seal the reservoir member against the cover member and defining a pressured reserve air chamber. The reservoir member is coupled to a hub assembly of the vehicle and the cover member is coupled to a brake assembly of the vehicle to facilitate the transfer of air to and from a rotating vehicle component and a stationary vehicle component.