Subscribe to RSS

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.

start-stop

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

banner

Add your comment

Nickname:
E-mail:
Website:
Comment:

*

Other articlesgo to homepage

新GGB公司铁路手册:保持轨道,以改善铁路性能

新GGB公司铁路手册:保持轨道,以改善铁路性能(0)

今天的铁路在寻求更高的效率,可靠性和性能方面正在经历重大变化 – 作为可靠的摩擦学解决方案的专家,GGB可以提供帮助。 GGB发布了一本新手册,介绍了在设计早期与GGB合作的好处。 它还详述了依赖过时设计的后果,并提供了有关GGB合作伙伴关系优势的更多信息。  GGB产品在铁路应用中具有许多优势。 我们的自润滑,免维护轴承解决方案具有高负载能力,耐腐蚀和抗污染。 从制动器连接到耦合器到转向架,GGB提供了多种解决方案,可以经济高效地优化铁路性能。

铁姆肯公司将参加杰富瑞集团 2018年全球工业会议

铁姆肯公司将参加杰富瑞集团 2018年全球工业会议(0)

This article, press release or announcement is translated from BearingNEWS (www.bearing-news.com) publications or from China Bearing Commercial Community (CBCC) sources 铁姆肯公司是工程轴承和动力传动产品的全球领导者,今天宣布将参加2018年8月8日在纽约市举行的杰富瑞集团2018年全球工业会议。 代表铁姆肯公司的代表将是执行副总裁兼首席财务官Philip D. Fracassa,。 会议期间分享的材料将在http://investors.timken.com上在线提供。

SKF感受到中国EV动力的力量

SKF感受到中国EV动力的力量(0)

This article, press release or announcement is translated from BearingNEWS (www.bearing-news.com) publications or from China Bearing Commercial Community (CBCC) sources哥德堡——中国对瑞典斯凯孚(SKF)公司轴承的需求量日益增加。得益于人们对电动汽车需求量的增加以及供应商对快速变化的汽车技术的适应,斯凯孚目前每月拿下至少一笔新订单。 斯凯孚汽车业务总裁Bernd Stephan称,虽然欧洲电动汽车的销量也在增加,但中国电动汽车的销量正呈井喷式增长。“我们在这一领域获得了大量新业务……如此多的项目突如其来,我们在持续地与这些客户洽谈。”Stephan说。 电动汽车对轴承制造商的影响巨大,这是因为电动汽车通常使用的轴承数量约为内燃机汽车使用轴承数量的一半。在斯凯孚专注于轴承和密封件等零部件的同时,包括德国舍弗勒集团在内的竞争对手们正在开发完整的电驱动产品系列。由于斯凯孚只有4%的产品用于内燃机,而轮毂轴承是其销量最多的产品,斯凯孚在很大程度上受到了保护。“我们在内燃机汽车市场中失去的业务,正在电动汽车市场中赢回来。”Stephan表示。处于两者之间的更多混合动力车的出现,对我们也是有利的。 汽车轴承市场竞争日益激烈,客户对价格越来越敏感,再加上中国竞争对手的崛起,这些都使人愈加担忧斯凯孚的长期盈利能力。Stephan称,斯凯孚可以使用更经济的钢铁和不同的部件来降低非高端轴承的制造成本。“我们的生产率是很高,并且不只在欧洲生产轴承。” 斯凯孚汽车业务还与日本NTN、NSK和JTEKT公司以及中国人本集团等公司展开竞争,其销售额占到了斯凯孚2017年销售额的31%。 尽管汽车业务一直是集团担忧的问题,但2015年的重整计划已经开始发挥作用,在第一季度几乎实现了8%的利润目标。重整计划主要针对高度定制的轴承和密封件。 展望未来的完全无人驾驶汽车市场,Stephan认为这会带来更多变化,由于轮毂轴承使用强度增加,轮毂轴承可能需要有更长的使用寿命。“现在,人们还意识不到无人驾驶意味着什么。理论上说,车辆数量将降低到现在的三分之一。”Stephan还补充道,现在为此做好准备非常重要。 2016年,斯凯孚汽车产品销售额达到了18.4亿美元,名列《欧洲汽车新闻》全球前100名供应商名单第86名。  

EPTDA欢迎五位新成员

EPTDA欢迎五位新成员(0)

This article, press release or announcement is translated from BearingNEWS (www.bearing-news.com) publications or from China Bearing Commercial Community (CBCC) sources 2018年6月,欧洲布鲁塞尔。中东和非洲地区机械动力传动和运动控制(PT / MC)行业的领先组织EMEA动力传动分配器协(EPTDA)在2018年第二季度会议上欢迎五家新成员公司。自去年9月在罗马举行的年度会议以来,新会员公司达到14家。这五位新成员是两家新的分销商公司 – Itsme公司和鲍曼国际有限公司以及三家新的制造商公司:Meter S.p.A,Tecnamic和Motive Srl。 “我们很高兴地欢迎这五位新成员加入我们的协会!他们的名单将于9月26日至28日在伦敦举行EPTDA年度大会上更新”。EPTDA执行副总裁Hans Hanegreefs说,“更重要的是,它们都将受益于EPTDA质量标志对其会员身份带来的特殊优势。他们将成为这个独一无二的平台的主要参与者,他们将参与一个专门的专业和道德团体”。  

JTEKT北美公司任命约翰·康纳为工业领域和售后市场的执行董事

JTEKT北美公司任命约翰·康纳为工业领域和售后市场的执行董事(0)

This article, press release or announcement is translated from BearingNEWS (www.bearing-news.com) 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。”

read more

Contacts and information

Social networks

Most popular categories

Legal Notice

© 2016 BEARING NEWS All rights reserved.