abcpanadol wrote:
找到了喔!
舊胎容易爆
http://www.nhtsa.gov/DOT/NHTSA/NVS/Public%20Meetings/SAE/2010/MacIsaac_SAE2010.pdf
這個連結沒有結論說舊胎容易爆
他做的實驗是Load test
結論是
"As the oven test severity was increased (i.e., longer durations of oven aging), more tires failed the FMVSS No. 139 Endurance & Low Pressure roadwheel test sequence"
"Tires become less resistant to overloading or underinflation with age…"
這不是評估外力穿刺的測試
簡單的說就是經過老化的輪胎無法達成輪胎上所標示的最大負重
而實際發生在路上的爆胎是屬於外力穿刺或是輪胎因負重而自爆的比例是多少？
補充他的測試方法
Endurance Performance
I.
SUMMARY OF NPRM PROPOSAL
Purpose: To evaluate a tire’s ability to operate at near maximum loading for
sustained periods.
Pass/Fail criteria: No visual evidence of tire failure and no loss in inflation pressure.
Ambient temperature: 40oC
Load: 90/100/110 percent of maximum rated load on sidewall.
Inflation pressure to be 180 kPa (26psi) for P-metric; for LT tires, 260 kPa (38 psi),
340 kPa (50 psi), and 410 kPa (59 psi ), for LT load range C, D and E, respectively.
Speed: 120 km/h (75 mph)
Duration (hrs): 8, 10, 22 (tota1 40) at the corresponding loads listed above
Low Pressure Performance Requirement
I. SUMMARY OF NPRM PROPOSAL
Purpose: To evaluate a tire’s low pressure performance at the low inflation thresh
old levels established for the tire pressure monitoring systems in the new FMVSS 138.
The agency proposed two alternatives for this test.
Pass/Fail criteria: No visual evidence of tire failure and no loss in inflation pressure.
Alternative 1:
Test speed:
120 km/h
Inflation pressure: 140 kPa (20 psi) for standard load tires; inflation pressures are
different for other tires
Test load: 100% of the maximum load rating that is labeled on the tire
Test Duration: 90 minutes
Ambient temperature: 40oC
)，何況事實證明只要設計的夠好，1年跟6年胎也沒有多誇張的差異，更別說這樣的數據遇到了新輪胎也爆了又要怎樣避免時根本零招架力...還有調胎哩：會把舊的輪胎調到前面來唷。
