续航

Search documents
彻底爆了!小米YU7,1小时大定突破289000台!
证券时报· 2025-06-26 15:15
Core Viewpoint - The launch of the Xiaomi YU7 is seen as a critical test for Xiaomi's automotive ambitions, with high expectations from fans and investors alike [1][2]. Group 1: Product Launch and Performance - Xiaomi YU7 achieved over 289,000 pre-orders within one hour of its announcement [1]. - The starting price for the YU7 is set at 253,500 yuan, while the AI glasses are priced at 1,999 yuan [1]. - The CEO expressed that if the initial order performance of YU7 surpasses that of SU7, it would be considered a success [3]. Group 2: Market Competition - The SUV market is described as highly competitive, with many strong players, making the YU7's entry particularly challenging [2]. - Xiaomi is confident in its product but acknowledges the intense competition and high expectations from consumers and partners [2]. Group 3: Product Specifications and Development - The YU7 features a CLTC range of 835 km, laser radar, and a Thor chip with 700 TOPS computing power, positioning it competitively within the industry [3]. - The YU7 is not merely an upgraded version of the SU7; 90% of its components have been newly developed, indicating significant innovation [3]. - The user interest for YU7 has reportedly been three times higher than that of SU7 during the same period, suggesting strong market demand [3].
三问三解 | 制动卡钳也会影响续航?
Zhong Guo Zhi Liang Xin Wen Wang· 2025-05-07 07:07
新能源汽车,除了受低温影响导致耗电增加、电量缩水外,影响续航的因素还有许许多多。今天就来聊聊那些细枝末节的因素对续航的影响。 制动卡钳也能影响续航? 作为制动部件,谁又能想到,制动卡钳居然也会影响车辆的续航呢。其实,制动卡钳的工作状态对续航的影响远超想象。 制动卡钳在工作时,工作缸内由液压油推动活塞,达到制动的目的。当制动活塞回位不完全时,制动盘片没有完全脱离,会产生拖滞力矩。如果拖滞力 矩大于设计标准的话,即使松开了刹车踏板,摩擦片始终和制动盘有残余的摩擦力。过大的拖滞力的存在,导致车辆燃油经济性降低,油/电耗将增大。 产生拖滞力矩的原因多种多样。有新能源主机厂的测试数据显示,在零下7℃的环境下,卡钳拖滞阻力矩会增加50%。这是因为低温导致制动液粘度上 升,活塞回位速度下降,刹车片与刹车盘产生持续摩擦。以一辆续航500公里的电动车为例,卡钳拖滞可能导致实际续航减少15-20公里。 还有设计缺陷导致的拖滞力。如某款电子驻车制动系统卡钳设计缺陷,后轮拖滞力矩高达8Nm,而设计值仅为3.5Nm,这个缺陷不仅导致制动盘温度升 高,更使得续航能力下降。 还有卡钳导销润滑不足、卡钳复位弹簧刚度较小、回位密封圈形状等因素 ...