Air pressure detection device
First Claim
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1. An air pressure detection device, comprising:
- pressure detecting sections respectively disposed on four wheels for detecting air pressures in tires;
a receiving section disposed on a vehicle body side for receiving tire pressure values transmitted from the pressure detecting sections;
speed detecting sections respectively disposed on hub sides of axles for detecting the speeds of the four wheels;
a speed deflection calculating section for calculating speed deflections of the front and rear axles by comparing the speeds of the wheels detected for each left and right wheel on the front and rear axle; and
a pressure lowered tire position judging section for judging an axle with a larger speed deflection between the front and rear axles as a pressure lowered tire existing axle by comparing the speed deflections and for judging a tire of a wheel with the higher speed between the two wheels on the pressure lowered tire existing axle as a pressure lowered tire.
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Accused Products
Abstract
Speed detecting sections 8 which detect the speeds of the respective wheels 2 at the hub sides of the axles 7 are provided, and by comparing the speeds of the respective wheels 2 detected by the speed detecting sections 8 for each two wheels 2 on each axle 7, the speed deflections of the axles 7 are calculated, and from comparison between the speed deflections, the axle 7 with the larger speed deflection between the axles 7 is judged as a pressure lowered tire existing axle. Between two wheels 2 on the pressure lowered tire existing axle, a tire 5 of the wheels 2 with the higher speed is judged as the pressure lowered tire.
8 Citations
14 Claims
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1. An air pressure detection device, comprising:
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pressure detecting sections respectively disposed on four wheels for detecting air pressures in tires; a receiving section disposed on a vehicle body side for receiving tire pressure values transmitted from the pressure detecting sections; speed detecting sections respectively disposed on hub sides of axles for detecting the speeds of the four wheels; a speed deflection calculating section for calculating speed deflections of the front and rear axles by comparing the speeds of the wheels detected for each left and right wheel on the front and rear axle; and a pressure lowered tire position judging section for judging an axle with a larger speed deflection between the front and rear axles as a pressure lowered tire existing axle by comparing the speed deflections and for judging a tire of a wheel with the higher speed between the two wheels on the pressure lowered tire existing axle as a pressure lowered tire. - View Dependent Claims (2, 3, 4, 9, 11, 13)
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5. An air pressure detection device, comprising:
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pressure detecting means respectively disposed on four wheels for detecting air pressures in tires; receiving means disposed on a vehicle body side for receiving tire pressure values transmitted from the pressure detecting means; speed detecting means respectively disposed on hub sides of axles for detecting the speeds of the four wheels; speed deflection calculating means for calculating speed deflections of the front and rear axles by comparing the speeds of the wheels detected for each left and right wheel on the front and rear axle; and pressure lowered tire position judging means for judging an axle with a larger speed deflection between the front and rear axles as a pressure lowered tire existing axle by comparing the speed deflections, and for judging a tire of a wheel with the higher speed between the two wheels on the pressure lowered tire existing axle as a pressure lowered tire. - View Dependent Claims (6, 7, 8, 10, 12, 14)
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Specification