Subscribe to RSS
UnitedStates Germany Russia India Turkey SouthAfrica England Netherlands Philippines Belgium Australia Brazil Spain China Kore

Schaeffler is to offer Customized start-stop solutions for the North American vehicle market

Drawing on energy only when needed is one of the obvious approaches to optimizing drive trains equipped with internal combustion engines. Accordingly, engine start-stop (ESS) systems are on the brink of implementation across a range of modern vehicles being produced for all of the world’s key markets. The increasingly stringent Corporate Average Fuel Economy (CAFE) regulations and the long-term efforts to reduce fuel consumption and emissions mean that ESS systems are also becoming increasingly prevalent for the North American market.


Among the exhibits on display from Schaeffler at the 2013 North American International Auto Show (NAIAS) in Detroit are two solutions for ESS systems that have been developed, successfully tested in North America and are customized to suit the automatic transmissions that are dominant in the North American market. The solutions include Schaeffler’s: latching valve, which is controlled by pressure pulses; and wrap spring one-way clutch for permanently connecting a starter to the housing of the torque converter. Both products give automobile manufacturers the opportunity to further optimize the performance of their current ESS systems.

“It is expected that, by the year 2020, start-stop systems will be part of the standard equipment of all vehicles to allow them to meet the required fuel consumption standards,” explains Jeff Hemphill, CTO of Schaeffler North America. “This presents a new challenge for the North American market, where approximately 95 percent of vehicles are equipped with an automatic planetary transmission. Schaeffler has expanded its product portfolio especially for this market by adding products with which even vehicles with automatic transmissions can be equipped with ESS systems in an efficient and cost-effective manner. Further, Schaeffler is providing innovative solutions for concerns surrounding hydraulic pumps driven by the engine. These new developments focus on seamless transitions, particularly during the starting procedure, to make engine changes transparent to vehicle occupants.”

Current ESS solutions are based on a two-stage multi-functional torque converter concept. In this concept, the engine and the transmission are decoupled when the engine is restarted. This allows the engine to be switched off when the engine is idling, which allows the vehicle to be driven for longer with the engine switched off to provide additional fuel savings. Electrically driven pumps and accumulators have thus far been commonly used to ensure a prompt engine restart even after the application pressure of the oil pump (driven by the internal combustion engine) has been lost, e.g. at a traffic light. However, when considering cost, benefits and design envelope, electric pumps and accumulator solutions are not ideal.

However, these solutions can be efficiently replaced by innovations from Schaeffler, such as the company’s latching valve. This valve, developed by Schaeffler, is activated by a hydraulic pressure pulse before the engine stops, which causes a small volume of pressurized oil to be stored in one of the transmission’s switching elements for the subsequent start-up operation, thus allowing a more rapid closure and helping to ensure that the vehicle has the necessary acceleration capability. Since the signal is given hydraulically, there is also no need for plug connectors or wiring.

A further requirement placed on modern start-stop systems is a quick and comfortable engine restart. This applies not only to starting after an extended standstill period with the engine switched off, but also (and in particular) to so-called “change of mind” starts, i.e. when the driver quickly decides that she/he wants to accelerate again while switching off the engine. Schaeffler’s new developments offer attractive solutions for optimization in these situations. Schaeffler’s wrap spring one-way clutch for permanently engaged starters is a solution developed by the company for integration into the housing of the torque converter. This allows fast and silent restarting, and also supports additional functions, such as “sailing” or driving at high speeds with the drive train decoupled and the internal combustion engine off. The permanently engaged starter generator encircles the torque converter by means of a wrap spring. This means that only a small amount of axial space is required. A spring-based, one-way clutch is used to engage the torque converter when the starter is activated. When the engine is running, it is decoupled from the torque converter (thus preventing wear) and the starter remains at a standstill despite being permanently connected to the drive train.


source: Schaeffler Technologies AG & Co. KG

0 commentsback to post


Add your comment



Other articlesgo to homepage



This article, press release or announcement is translated from BearingNEWS ( publications or from China Bearing Commercial Community (CBCC) sources. JTEKT北美公司–汽车、工业和航空航天市场领先系统和开发合作伙伴,宣布任命约翰·康纳为公司的工业领域和售后市场执行董事。其将主要负责销售团队的领导,推动和创新。 约翰拥有丰富的领导经验,并通过领导跨文化、跨语言、跨区域和跨学科的团队,获得了新的业务发展成功。除了在美国海军潜艇部队服役,约翰还在GKN公司的运营、工程、销售和管理职位从事了超过20年。他从法布科汽车公司加入我们,在那里他担任全球销售与营销副总裁。 “约翰对工业市场、技术的理解,他的领导能力,以往的经历,以及其卓越的商业成就使他成为JTEKT团队的宝贵成员。”销售和营销副总裁约翰·贾洛森斯基说,“约翰基于价值观的领导能力将建立在我们工业团队的成功之上,并为持续的成功而定位。我们很高兴他能加入我们的团队。”



This article, press release or announcement is translated from BearingNEWS ( publications or from China Bearing Commercial Community (CBCC) sources. 由中国土木工程学会、城市公共交通学会、中国智慧轨道交通联盟等主办的“2018年上海国际先进轨道交通技术展”4月19日在上海新国际博览中心启幕,以中国中车为代表的一大批国内外轨道交通行业企业参加了本次展会。瓦轴集团携系列轨道交通轴承亮相展会,吸引了行业企业、新老客户及相关人士的关注。 来自中国铁路总公司的统计显示,到2017年底,全国铁路营业里程达到12.7万公里。按照规划,力争到2025年,我国铁路网规模达到17.5万公里左右,其中高铁3.8万公里左右;到2035年,率先建成发达完善的现代化铁路网。同时,地铁和有轨电车也将迎来快速增长期,预计到2020年,我国城市轨道交通开通运营城市将达到50座,运营总里程将突破6000公里。 在轨道交通轴承领域,瓦轴集团建立了铁路货车、客车、机车及城轨交通轴承研发制造基地,全系研发轨道交通轴承,成为国内唯一可全面配套货客机车轴承产品的企业,拥有铁路重载货车轴承自主核心技术,轨道交通项目发明专利4项,累计为中国轨道交通配套600万套轴承,在线运行130万套,先后研制上海地铁1号线、长春轻轨、大连地铁1-2号线、大连金普线城际轻轨列车配套轴承并批量应用。 展会上,瓦轴集团领导与中车公司及下属企业、申通南车(上海)轨道交通车辆有限公司等新老客户就轨道交通最新产品、技术及合作进行了深入交流。



This article, press release or announcement is translated from BearingNEWS ( publications or from China Bearing Commercial Community (CBCC) sources.  日本精工株式会社(以下简称NSK)成功开发了皮卡、大型SUV、商用车用“高性能圆锥滚子轮毂轴承单元* 1”。该产品通过集成化以及低摩擦技术的应用,有助于提高汽车的可靠性并降低油耗。 NSK预计到2023年该产品的销售额达到50亿日元。 开发背景 圆锥滚子轮毂轴承单元的寿命及刚性均优于同等尺寸下的球轴承寿命,因此被广泛应用于皮卡,大型SUV和商用车辆。但是,球轴承已经发展到第3代(HUB主轴一体化)并且已被广泛应用,与之相比,大多数圆锥滚子轴承因受到生产制约而使用两个单列轴承,或者仅到第1代和第2代的应用为止。因此,整车厂以及市场上的轮毂轴承在更换时需要组装主轴,存在可能由于压装不良和预紧力过度或不足而导致诸如异响等市场问题的产生。由此,第2.5代(已安装主轴)和第3代产品的需求日渐增加。 此外,由于各国的环保法规和燃油效率标准日渐苛刻,因此对经济型燃油的研发也扩大至乘用车领域以外的车辆,因此减小圆锥滚子轮毂轴承单元的摩擦成为一个重要课题。 本产品特点 1. 通过单元化提高可靠性 NSK在现存第2代圆锥滚子轮毂轴承单元的基础上开发出已预先安装HUB主轴的第2.5代产品。并且,将HUB主轴与内圈进行一体化的第3代产品也正在开发中。 NSK通过实施HUB主轴预装和预压控制,可以防止压装不当以及拧紧力矩过大或不足等不良情况的产生,有助于提高产品在市场上的可靠性。 2. 低摩擦技术的应用 NSK通过乘用车球轴承的研发和生产,在润滑脂,密封圈以及高密封性端盖方面累积了成熟的技术。通过以上技术,第2.5代产品已实现约20%至35%的摩擦力矩降低(与第2代相比)。 并且,第3代产品可以进一步低减约10%的摩擦。 产品效果 本产品作为针对皮卡、大型SUV和商用车的轮毂轴承,通过低摩擦技术以及集成化技术的应用,可为提高汽车可靠性和降低油耗做出贡献。



This article, press release or announcement is translated from BearingNEWS ( publications or from China Bearing Commercial Community (CBCC) sources. 舍弗勒集团第三次在纽伦堡法兰肯塔尔举行年度股东大会,自上市以来第三次股东有机会投票表决股息。每股普通无投票权股息从前一年的50美分上调至55美分,增幅为10%。这表示派息比率约为合并净收入的35%,处于目前30%至40%的目标范围内。 舍弗勒集团正在向“移动性的明天”迈进,它的速度和成功,也体现在年度股东大会的电动汽车“舍弗勒汽车”概念上。电动汽车将实现无人驾驶,旨在缓解日益增长的大都市区的交通堵塞。该车辆能够在现场和侧面停车,并且各种车身可以灵活配置和优化运输人员和货物。该公司目前正在研究将该概念引入到批量化生产阶段。 首席执行官强调了该计划对未来的重要性,即“议程4加1”,旨在执行舍弗勒集团的战略,并且是2017年董事会的优先事项之一。“4加1”包括四个类别再加上一个类别,表明综合方案的重点:以客户为中心,卓越运营,财务灵活性,领导力和人才管理,作为第五大类(“加一”),确保长期竞争力和价值创造。截至2017年底,该计划的完成率已经达到35%,其中包括16项举措。因此,董事会决定将该计划的四项举措扩大到目前的20项举措。目前有1000多名员工正在直接实施该计划,该计划将在未来五年内投入总额10亿欧元。 在年度股东大会上,罗森菲尔德向股东们详细介绍了该计划的六项举措:电子交易,工业4.0,明日工厂,营运资金,领导力和企业价值观以及数字议程倡议。 总体而言,罗森菲尔德认为舍弗勒集团已经为未来做好了准备。现在需要的是将“同一个舍弗勒,同一个团队,同一个声音”作为议程“4加1”的一部分加以实施。 投票结果和首席执行官在今天的年度大会上发表的演讲稿可在上看到。



This article, press release or announcement is translated from BearingNEWS ( publications or from China Bearing Commercial Community (CBCC) sources. 斯凯孚的云底分析将帮助BP最大限度地利用状态监测数据来提高工厂的可靠性 斯凯孚与英国石油公司签署了一份为期三年,价值数百万英镑的合同,为英国离岸资产提供状态监测服务。 除了收集各种旋转设备(包括风扇,电机和发电机)的数据外,斯凯孚还将提供分析,报告和建议,给BP高效使用设备提供决策性的建议。 有证据表明,只有1%的海外运营商使用他们收集的大量数据来帮助他们做出决策。 通过BP和斯凯孚之间的密切合作,该合同已经获得并记录了重要的效率收益。 斯凯孚服务负责人Ian Peverill表示:“使用准确的数据来推动决策并避免重复出现的问题对我们的客户和整个行业都有好处。最终,这有助于消除浪费并提高可靠性。“    “最近,我们的技术能够检测到轴承振动的根本原因,并提供防止关键电机故障的建议。我们的数据分析软件甚至可以提出更持久和更适合的替代解决方案。“     虽然BP和斯凯孚之间的协议涵盖了明确的设备清单,但斯凯孚还可以根据需要向BP提供“非常规”服务 – 例如电动机监控或旋转设备的动态平衡。

read more

Contacts and information

Social networks

Most popular categories

Legal Notice

© 2016 BEARING NEWS All rights reserved.