A tire pressure control arrangement for a vehicle having at least two tires connected to an air supply. Each tire is connected to the air supply via a supply line having a first valve connected to a second valve. The arrangement further includes a pressure sensor between the two valves. The first valve is closed while the supply line is connected to a pressure supply and the pressure in the supply line is monitored for a pre-determined period of time by a control system on the vehicle to detect whether there are any leaks in the arrangement.

An apparatus (14) for installation and removal of electronic components (10) for a tire comprises an expansion device (16) having a plurality of movably supported longitudinal prongs (18), wherein the expansion device (16) is adapted for moving at least a part of the plurality of prongs (18) between a neutral position with a least distance between the prongs (18) and at least one expansion position with a distance between the prongs (18) exceeding the least distance. The prongs (18) comprise prong tips (20), which each comprise a curved engagement surface (22), wherein each prong is adapted for engaging an exposed top lip (8) of an elastic container (2), in which the electronic component (10) is storable. The expansion device (16) is adapted for moving at least a part of the plurality of prongs (18) to an expansion position with the engagement surfaces (22) engaging the top lip (8) of the container (2), in which expansion position the top lip (8) is expanded.

An apparatus (14) for installation and removal of electronic components (10) for a tire comprises an expansion device (16) having a plurality of movably supported longitudinal prongs (18), wherein the expansion device (16) is adapted for moving at least a part of the plurality of prongs (18) between a neutral position with a least distance between the prongs (18) and at least one expansion position with a distance between the prongs (18) exceeding the least distance. The prongs (18) comprise prong tips (20), which each comprise a curved engagement surface (22), wherein each prong is adapted for engaging an exposed top lip (8) of an elastic container (2), in which the electronic component (10) is storable. The expansion device (16) is adapted for moving at least a part of the plurality of prongs (18) to an expansion position with the engagement surfaces (22) engaging the top lip (8) of the container (2), in which expansion position the top lip (8) is expanded.

A method is provided for improving both landing gear wheel drive assembly performance and energy efficiency performance in an aircraft equipped with one or more landing gear wheel drive assemblies to move the aircraft autonomously on the ground without reliance on the aircraft's engines. Aircraft moved on the ground by thrust from aircraft engines may also show improved energy efficiency. The present method employs a discovered relationship between aircraft tyre pressure and landing gear wheel drive assembly performance and maintains aircraft tyre inflation pressure at an optimum high pressure that enhances both landing gear wheel drive assembly performance and aircraft energy efficiency while the aircraft are driven on the ground by the landing gear wheel drive assemblies. Operation of the landing gear wheel drive assembly may be automatically prevented by a failsafe mechanism when optimum high tyre inflation pressure levels are not maintained during aircraft ground travel.

A tire pressure monitoring apparatus includes a frequency detection unit configured to detect a resonant frequency according to a tire pressure; a calculation unit configured to accumulate the resonant frequency and calculate an average frequency and a frequency variance; a coordinate system setting unit configured to locate a first average variance point corresponding to the average frequency and the frequency variance, on an average-variance plane, and locate second average variance points corresponding to average frequencies and frequency variances of resonant frequencies measured for types of tires, on the average-variance plane; a tire determination unit configured to determine a type of a tire in consideration of distances between the first and second average variance points; and a low-pressure frequency setting unit configured to set a low-pressure frequency according to the determined type of the tire, as a reference low-pressure frequency for determining whether the tire pressure is a low pressure.

A tire pressure monitoring apparatus includes a frequency detection unit configured to detect a resonant frequency according to a tire pressure; a calculation unit configured to accumulate the resonant frequency and calculate an average frequency and a frequency variance; a coordinate system setting unit configured to locate a first average variance point corresponding to the average frequency and the frequency variance, on an average-variance plane, and locate second average variance points corresponding to average frequencies and frequency variances of resonant frequencies measured for types of tires, on the average-variance plane; a tire determination unit configured to determine a type of a tire in consideration of distances between the first and second average variance points; and a low-pressure frequency setting unit configured to set a low-pressure frequency according to the determined type of the tire, as a reference low-pressure frequency for determining whether the tire pressure is a low pressure.

A system includes a wheel, a hubcap coupled to the wheel and a tire pressure sensor coupled to the wheel. The system also includes a brake control unit (BCU) and an active hubcap circuit coupled to the hubcap. The active hubcap circuit is electrically coupled to the tire pressure sensor and the BCU and configured to receive an input signal from at least one of the tire pressure sensor or the BCU, generate an output signal by increasing a signal to noise ratio of the input signal and output the output signal to at least one of the BCU or the tire pressure sensor.

A method according to an exemplary aspect of the present disclosure includes, among other things, activating hazard lights of an electrified vehicle in response to a high voltage battery disconnect event.

To achieve an information processing apparatus and a mobile apparatus that individually calculate an inclination of the mobile apparatus itself and an inclination of a traveling surface. A measurement value of an air pressure sensor that measures an air pressure of a tire of the mobile apparatus is received, and the inclination of the mobile apparatus is calculated on the basis of the tire air pressure. Furthermore, a measurement value of an absolute pressure sensor attached to the mobile apparatus is received, and an angle of the traveling surface on which the mobile apparatus travels and a position of the mobile apparatus are calculated on the basis of a horizontal movement amount of the mobile apparatus and a vertical movement amount that is calculated on the basis of the measurement value of the absolute pressure sensor. Furthermore, a plurality of different state values such as inclination information of the traveling surface that changes with time transition is input to a Kalman filter, and state values that have already been acquired are updated on the basis of the newly input state values to generate and output the latest state values.

A position estimation device includes an ECU. The ECU is configured to estimate the position of a vehicle using at least a traveled distance of the vehicle. The ECU calculates correction factors for a reference tire rolling radius and stores the correction factors in a storage device. Each of the correction factors is set for a corresponding one of a plurality of vehicle speed ranges. The ECU calculates the traveled distance of the vehicle based on a rotation parameter and the corrected reference tire rolling radius obtained by correcting the reference tire rolling radius using the correction factor.