公开(公告)号：US20130177826A1

公开(公告)日：2013-07-11

申请号：US13345288

申请日：2012-01-06

申请人： Daniel I. HARRIS ,  Derek R. LEBZELTER ,  John P. SALVADOR ,  William H. PETTIT ,  Akbar CHOWDHURY ,  Edward G. HIMES

发明人： Daniel I. HARRIS ,  Derek R. LEBZELTER ,  John P. SALVADOR ,  William H. PETTIT ,  Akbar CHOWDHURY ,  Edward G. HIMES

IPC分类号： H01M8/04

CPC分类号： H01M8/04955 ,  H01M8/04559

摘要： A system and method for reducing the frequency of stack stand-by mode events, if necessary, as a fuel cell stack ages and experiences lower performance. The method determines an irreversible voltage loss of the fuel cell stack at predetermined time intervals and determines a stack voltage degradation variable based on the irreversible voltage loss. The method also determines if the stack voltage degradation variable indicates that the fuel cell stack will not meet predetermined stack end-of-life voltage requirements and calculates a maximum allowed voltage degradation rate of the fuel cell stack. The method calculates a maximum number of stand-by mode events per unit time that can be allowed to prevent the stack from exceeding the maximum allowed degradation rate and controls the number of stand-by mode events based on the calculated maximum number of stand-by mode events.

摘要翻译： 如果需要，当燃料电池堆老化并且经历较低的性能时，用于降低堆叠待机模式事件的频率的系统和方法。 该方法以预定的时间间隔确定燃料电池堆的不可逆电压损失，并且基于不可逆的电压损耗确定堆电压劣化变量。 该方法还确定堆叠电压劣化变量是否表明燃料电池堆不能满足预定的堆积寿命电压要求并且计算燃料电池堆的最大允许电压降低率。 该方法计算出每单位时间的待机模式事件的最大次数，可以被允许以防止堆栈超过允许的最大降级率，并根据计算的最大待机数量控制待机模式事件的数量 模式事件。

公开(公告)号：US08945785B2

公开(公告)日：2015-02-03

申请号：US13345288

申请日：2012-01-06

申请人： Daniel I. Harris ,  Derek R. Lebzelter ,  John P. Salvador ,  William H. Pettit ,  Akbar Chowdhury ,  Edward G. Himes

发明人： Daniel I. Harris ,  Derek R. Lebzelter ,  John P. Salvador ,  William H. Pettit ,  Akbar Chowdhury ,  Edward G. Himes

IPC分类号： H01M8/04

CPC分类号： H01M8/04955 ,  H01M8/04559

摘要： A system and method for reducing the frequency of stack stand-by mode events, if necessary, as a fuel cell stack ages and experiences lower performance. The method determines an irreversible voltage loss of the fuel cell stack at predetermined time intervals and determines a stack voltage degradation variable based on the irreversible voltage loss. The method also determines if the stack voltage degradation variable indicates that the fuel cell stack will not meet predetermined stack end-of-life voltage requirements and calculates a maximum allowed voltage degradation rate of the fuel cell stack. The method calculates a maximum number of stand-by mode events per unit time that can be allowed to prevent the stack from exceeding the maximum allowed degradation rate and controls the number of stand-by mode events based on the calculated maximum number of stand-by mode events.

摘要翻译： 如果需要，当燃料电池堆老化并且经历较低的性能时，用于降低堆叠待机模式事件的频率的系统和方法。 该方法以预定的时间间隔确定燃料电池堆的不可逆电压损失，并且基于不可逆的电压损耗确定堆电压劣化变量。 该方法还确定堆叠电压劣化变量是否表明燃料电池堆不能满足预定的堆积寿命电压要求并且计算燃料电池堆的最大允许电压降低率。 该方法计算出每单位时间的待机模式事件的最大次数，可以被允许以防止堆栈超过允许的最大降级率，并根据计算的最大待机数量控制待机模式事件的数量 模式事件。

公开(公告)号：US5351193A

公开(公告)日：1994-09-27

申请号：US103324

申请日：1993-08-09

申请人： David C. Poirier ,  John C. Haraf ,  George T. Stephens ,  Robert C. Simon, Jr. ,  Edward G. Himes

发明人： David C. Poirier ,  John C. Haraf ,  George T. Stephens ,  Robert C. Simon, Jr. ,  Edward G. Himes

IPC分类号： F02D41/00 ,  F02M25/08 ,  G06F15/50 ,  F02M33/02

CPC分类号： F02D41/004 ,  F02M25/08 ,  F02M2025/0845

摘要： A fuel vapor canister is purged by admitting fuel vapor from the canister to the vehicle engine under control of a solenoid valve, the duty cycle of the valve being controlled to optimize the purge rate. Closed loop fuel correction and block learn fuel correction factors developed by the fuel control system are used to update a learned purge duty cycle which is stored in a keep-alive memory.

摘要翻译： 通过在电磁阀的控制下将燃料蒸汽从罐接纳到车辆发动机来清除燃料蒸汽罐，阀的占空比被控制以优化吹扫速率。 用于由燃料控制系统开发的闭环燃料校正和阻止学习燃料校正因子来更新存储在保持存储器中的学习清洗占空比。