This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of Digital Tire Pressure Display Device
Annotation ability available
Sector:
Language:
English
Abstract
Basic vehicle performance, such as Safety, Comfort and Economy, are by dependent on tire performance, and it is the air pressure in the tire which assures this performance. However, tire air has a tendency to leak naturally, making it necessary to check them periodically. Since a deterioration in vehicle performance resulting from a drop on tire air pressure can not be directly felt by the driver, the number of people maintaining their tires sufficiently is relatively few. There have been many tire pressure warning devices developed which advise the driver when the pressure drops below a prescribed level.
Differing from conventional devices, the TWD-III features a 7-step digital display (at a pitch of 0.1 kgf/cm2) which shows the pressure of each tire within an optional range, and it also has a flat tire warning function.
The employment of echo effect from clystal vibrator resonance precludes the need to attach a power source on the tire. The pressure sensor is installed in place of wheel center cap designed so that a double headed magnet driven by tire pressure changes turns reed switches on and off. The resulting combination of three clystal vibrators determines the pressure indicator in 7-step. It is further designed to compensate centrifugal force in the wheel so that no fluctuation in the reading is caused by changes in speed.
Compared with conventional ones, this new device provides high prospects for enhancing driver convenience while maintaining a high level of preventive safety and vehicle performance.
Recommended Content
Technical Paper | Low Tire Pressure Warning Device (LTPWD) |
Technical Paper | Real Time Tire Pressure Electronic Monitoring System with Dashboard Possibilities |
Technical Paper | Tire Pressure Warning System for Passenger Car Applications |
Citation
Nishimura, H. and Katsumata, M., "Development of Digital Tire Pressure Display Device," SAE Technical Paper 851237, 1985, https://doi.org/10.4271/851237.Also In
References
- Nishimura Hiroaki “Trend of Tire Pressure Warning Devices,” Journal of SAE Japan 38 11 1984 1316 1321
- Wazawa Kiyoshi Hosaka Akio “Development of the NISSAN Alarm System of Tire Abnormal Condition (NASTAC),” NISSAN Technical Review 8 1973 107 115
- Nishimura Hiroaki “The Development of Two Simple Tire Warning Devices,” SAE paper 840067 1984
- Kurashige Tomoyoshi Kobane Sumio Takahashi Hiroshi Komatsu Satoru “Low Tire Pressure Warning Device (LTPWD),” SAE paper 820458 1982