JPS61129144U

JPS61129144U -

Info

Publication number: JPS61129144U
Application number: JP14883484U
Authority: JP
Priority date: 1984-10-01
Filing date: 1984-10-01
Publication date: 1986-08-13

Description

[Brief explanation of the drawing]

第１図は、本考案の第１実施例の説明図、第２
図は、タイヤ内チユーブの２種類の材料でみた空
気圧低下状況を示すグラフ、第３図ａ，ｂは、普
通タイヤ、チユーブレスタイヤの構造を示す断面
図である。第４図は従来装置の説明図である。１……空気圧低下出力回路、２……時計装置、
３……空気圧低下特性出力回路、４……基準値設
定回路、５……演算装置、６……比較器、７……
警告装置、８……普通タイヤ、９……チユーブ、
１０……チユーブレスタイヤ、１１……インナラ
イラ、１２……形成出力回路、１３……漏れパタ
ーンメモリ装置、１４……補正回路、１５……警
報器、１６……リム。 Figure 1 is an explanatory diagram of the first embodiment of the present invention;
The figure is a graph showing how the air pressure decreases with respect to two types of tube materials in the tire, and Figures 3a and 3b are cross-sectional views showing the structures of a regular tire and a tubeless tire. FIG. 4 is an explanatory diagram of a conventional device. 1... Air pressure reduction output circuit, 2... Clock device,
3...Air pressure drop characteristic output circuit, 4...Reference value setting circuit, 5...Arithmetic unit, 6...Comparator, 7...
Warning device, 8... Ordinary tire, 9... Tube,
DESCRIPTION OF SYMBOLS 10... Tubeless tire, 11... Inner roller, 12... Formation output circuit, 13... Leakage pattern memory device, 14... Correction circuit, 15... Alarm, 16... Rim.

Claims

[Scope of Claim for Utility Model Registration] A clock device that measures time and outputs a signal corresponding to the elapsed time since the time of checking or refilling tire air pressure, and a clock device that stores the tire air pressure at the time of said checking or refilling. an air pressure output circuit that outputs a signal corresponding to this, an air pressure reduction characteristic output circuit that stores an air pressure reduction characteristic of the tire air pressure holding member and outputs a signal corresponding to this; an arithmetic circuit that calculates the tire air pressure at that point in time based on the signal outputted from the air pressure output circuit and the air pressure characteristic output circuit, and a calculation circuit that stores a reference value of tire air pressure and outputs a signal corresponding to the tire air pressure. a reference value setting circuit that compares the value calculated by the arithmetic device with a reference value of the tire air pressure, and a ratio device that outputs a signal corresponding to the value calculated by the arithmetic device; A tire pressure warning device for a vehicle, comprising: a warning device that warns to replenish tire pressure when an estimated value falls below a reference value for tire pressure;