§ 393.78 Windshield wiping and washing systems.
发布02-19
生效03-23
摘要总结AI 辅助解读
该条款为美国联邦法规第49篇（交通）中关于商用车挡风玻璃雨刮及清洗系统的技术标准。规定1968年12月25日后制造的车辆需符合FMVSS No. 104标准；1953年至1968年间制造的车辆需配备至少两片动力驱动雨刮器，且真空驱动系统不得受进气歧管压力影响。此外，在“driveaway-towaway”（驾驶-拖曳混合运输）作业期间，允许雨刮和清洗系统不处于工作状态。此为车辆出厂时的静态合规要求，主要约束制造商与车辆注册状态，对跨境物流动态运营环节无直接程序性变更。
- (a) Vehicles manufactured on or after December 25, 1968. Each bus, truck, and truck-tractor manufactured on or after December 25, 1968, must have a windshield wiping system that meets the requirements of FMVSS No. 104 (S4.1) in effect on the date of manufacture. Each of these vehicles must have a windshield washing system that meets the requirements of FMVSS No. 104 (S4.2.2) in effect on the date of manufacture.
- (b) Vehicles manufactured between June 30, 1953, and December 24, 1968. Each truck, truck-tractor, and bus manufactured between June 30, 1953, and December 24, 1968, shall be equipped with a power-driven windshield wiping system with at least two wiper blades, one on each side of the centerline of the windshield. Motor vehicles which depend upon vacuum to operate the windshield wipers, shall have the wiper system constructed and maintained such that the performance of the wipers will not be adversely affected by a change in the intake manifold pressure.
- (c) Driveaway-towaway operations. Windshield wiping and washing systems need not be in working condition while a commercial motor vehicle is being towed in a driveaway-towaway operation.
[70 FR 48054, Aug. 15, 2005]