公开(公告)号：EP1444120A1

公开(公告)日：2004-08-11

申请号：EP02768917.3

申请日：2002-09-26

申请人： KELSEY-HAYES COMPANY

发明人： ZHENG, Yuhong ,  SONG, Wenwei ,  MILOT, Danny, R.

IPC分类号： B60T8/36 ,  G05D16/20

CPC分类号： B60T8/326 ,  B60T8/36 ,  B60T8/3655

摘要： A method of boundary auto-calibration for proportional poppet valve pressure control comprises implementing an estimator to estimate a boundary deviation of the valve. A pressure command signal is detected and its derivative over time is obtained. Then, determining which closing boundary should be updated is decided based on the sign of the pressure command derivative. A pressure error is obtained by subtracting an actual wheel brake pressure from its pressure command. Then a modified pressure error is calculated and implemented in the estimation. Finally, a boundary table is updated using the resultant boundary deviation estimate. An alternate embodiment implementing a fast boundary auto-calibration scheme includes a quasi-closed-loop pressure control system. The auto-calibration test is preferably set up so that the test only needs one cycle of pressure upward sweep and pressure downward sweep in order to cover the entire operating range of pressures for the valves.

公开(公告)号：EP1444120B1

公开(公告)日：2011-03-16

申请号：EP02768917.3

申请日：2002-09-26

申请人： KELSEY-HAYES COMPANY

发明人： ZHENG, Yuhong ,  SONG, Wenwei ,  MILOT, Danny, R.

IPC分类号： B60T8/36 ,  G05D16/20

CPC分类号： B60T8/326 ,  B60T8/36 ,  B60T8/3655

摘要： A method of boundary auto-calibration for proportional poppet valve pressure control comprises implementing an estimator to estimate a boundary deviation of the valve. A pressure command signal is detected and its derivative over time is obtained. Then, determining which closing boundary should be updated is decided based on the sign of the pressure command derivative. A pressure error is obtained by subtracting an actual wheel brake pressure from its pressure command. Then a modified pressure error is calculated and implemented in the estimation. Finally, a boundary table is updated using the resultant boundary deviation estimate. An alternate embodiment implementing a fast boundary auto-calibration scheme includes a quasi-closed-loop pressure control system. The auto-calibration test is preferably set up so that the test only needs one cycle of pressure upward sweep and pressure downward sweep in order to cover the entire operating range of pressures for the valves.

公开(公告)号：EP1670653A1

公开(公告)日：2006-06-21

申请号：EP04794008.5

申请日：2004-10-01

申请人： KELSEY-HAYES COMPANY

发明人： ZHENG, Yuhong ,  MILOT, Danny

IPC分类号： B60C23/06

CPC分类号： B60C23/064 ,  B60C23/0488

摘要： A system for real-time signal processing for vehicle monitoring, including a first device disposed in a tire of a vehicle and producing a signal that is a function of a tire contact time period, during which a point at the tire circumference stays in contact with the ground, and a second device operative to repetitively perform a first task of processing the signal to calculate the tire contact time period at a first predetermined rate, and to repetitively perform a second task of calculating a tire load based at least in part upon the calculated tire contact time period at a second predetermined rate, wherein said second predetermined rate is less than said first predetermined rate.

公开(公告)号：EP1984216A2

公开(公告)日：2008-10-29

申请号：EP06851989.1

申请日：2006-12-15

申请人： The Goodyear Tire & Rubber Company ,  Kelsey Hayes Company

发明人： VADURI, Sunder, Shesha, Venkat ,  BENEDICT, Robert, Leon ,  CHOI, Seiburn, Ben ,  DOLL, Kenneth, Alan ,  KINDSETH, Jon, William ,  LO, Alan, Ka, Yan ,  MILOT, Danny, Robert ,  SPIEKER, Arnold, Herman ,  ZHENG, Yuhong

IPC分类号： B60T8/172 ,  B60T8/1755 ,  B60C23/04

CPC分类号： B60T8/1725 ,  B60T8/17551 ,  B60T2230/02 ,  B60T2240/03

摘要： Vehicle properties are determined by providing both actual and real-time data of the tires to the vehicle control system. The data includes both static and dynamic tire data. The properties are determined by the following steps: a) putting a vehicle in motion, the vehicle being provided with a set of tires and a vehicle control system wherein at least one tire has means to communicate with the vehicle control system and the vehicle control system has a processor, a vehicle observer, and a preprogrammed vehicle model; b) sending either static or dynamic tire information from the tire to the vehicle control system via the tire communication means; and c) estimating a vehicle property using the received tire information.

公开(公告)号：EP1412238A1

公开(公告)日：2004-04-28

申请号：EP02750273.1

申请日：2002-07-24

申请人： KELSEY-HAYES COMPANY

发明人： ZHENG, Yuhong ,  MILOT, Danny, R.

IPC分类号： B60T8/36

CPC分类号： B60T8/326 ,  B60T8/36 ,  B60T8/3655 ,  B60T8/4072

摘要： An electrohydraulic brake system where brake pressure is controlled by the combined action of an apply valve and a dump valve by the implementation of a method of controlling the voltage applied to the apply and dump valve. The EHB pressure control system receives a desired wheel pressure command and, with a caliper pressure feedback signal, implements an algorithm to compute one voltage command for the apply valve and another for the dump valve, corresponding to a requested flow from the hydraulics. The voltage command drives current control electronics. The electronics in turn power the solenoids of the proportional apply and dump poppet valves to control flow in or out of the brakes and modulate wheel pressure as required. Use of the algorithm to control the electromagnetic poppet valves achieves the commanded pressure at a vehicle's brakes reliably and with good control in all states of flow through the valve. The algorithm is a function of the existing pressure within the system and whether there is bulk or leakage flow through the valves.