公开(公告)号：US07109855B2

公开(公告)日：2006-09-19

申请号：US10406001

申请日：2003-04-03

Applicant: Ulrich Appt ,  Dirk Schroeter

Inventor： Ulrich Appt ,  Dirk Schroeter

IPC: B60Q1/00

CPC classification number: B60L11/1881 ,  B60L11/005 ,  B60L11/1892 ,  B60L11/1894 ,  B60L2250/30 ,  G01M3/40 ,  G08B21/16 ,  H01M8/04089 ,  Y02T10/7022 ,  Y02T90/34

Abstract: In a method and apparatus for monitoring a parameter, such as a concentration level, of an easily ignited gas, such as hydrogen, includes a wake-up device that is connected to a current/voltage supply, and can switch the monitoring unit from a state of rest into an active state after an adjustable time interval. The device according to the invention can be used in a fuel cell system or in a vehicle. Furthermore, the invention relates to a method for monitoring the concentration of an easily ignited gas.

公开(公告)号：US4961476A

公开(公告)日：1990-10-09

申请号：US330762

申请日：1989-03-30

Applicant: Lothar Witte ,  Norbert Stelter ,  Ulrich Appt ,  Rolf Geiger ,  Klaus-Gerhard Wolpert ,  Stephan Lawitzki

Inventor： Lothar Witte ,  Norbert Stelter ,  Ulrich Appt ,  Rolf Geiger ,  Klaus-Gerhard Wolpert ,  Stephan Lawitzki

IPC: B60K17/35 ,  B60K23/08 ,  B60T8/1761 ,  B60T8/1769 ,  F16D48/12

CPC classification number: B60K23/0808

Abstract: The arrangement controls a friction element for limiting a rotational speed compensation between the axles of a two-axle or all-wheel-driven vehicle as a function of the difference of the medium wheel speeds of both axles (longitudinal speed difference). This longitudinal speed difference is compared with two driving-speed-dependent tolerance bands, the first tolerance band being determining for positive and the second tolerance band being determining for negative longitudinal speed differences. If the values of the longitudinal speed differences are above the first or below the second tolerance band, the limiting is increased; if the values are within the tolerance bands, the instantaneous limiting is maintained; and if the values are between the tolerance bands, the limiting is reduced. This arrangement may also be expanded to include an adaptation device of the limit criteria with respect to different tread radii of the wheels and a cornering correction device.

Abstract translation: 该布置控制用于限制两轴或全轮驱动车辆的轴之间的转速补偿的摩擦元件，作为两轴的中轮速度差（纵向速度差）的函数。 将该纵向速度差与两个驱动速度相关的公差带进行比较，第一公差带被确定为正，第二公差带是确定负的纵向速度差。 如果纵向速度差的值高于第一或低于第二公差带，则限制增加; 如果值在公差带内，则保持瞬时限制; 并且如果这些值在公差带之间，则限制被减小。 该布置还可以扩展到包括相对于车轮的不同胎面半径和转弯校正装置的极限标准的适配装置。