公开(公告)号：WO1997006421A1

公开(公告)日：1997-02-20

申请号：PCT/US1996010131

申请日：1996-06-12

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  REMBOSKI, Donald, J. ,  PLEE, Steven, L. ,  WOZNICK, Mark, R. ,  FOLEY, John, Francis

IPC: G01N03/32

CPC classification number: F02M25/0809

Abstract: An apparatus and method of detecting a leak in an evaporative emissions system measures vapor flow out of the evaporative emissions system while maintaining a zero pressure difference from inside a fuel tank to atmosphere and provides a reference vapor flow variable dependent on the measurement (317). A pressurized vapor and leak flow variable is measured (323) dependent on measured vapor flow out of the evaporative emissions system while maintaining a pressure difference of 10'' of water from inside the fuel tank to atmosphere. A leak is indicated (327) if a difference between the reference vapor flow variable and the pressurized vapor and leak flow variable is greater than a predetermined leak flow factor.

Abstract translation: 检测蒸发排放系统中的泄漏的装置和方法测量蒸发排出系统中的蒸汽流，同时保持从燃料箱内部到大气的零压差，并根据测量值提供参考蒸气流量变化（317）。 测量加压蒸汽和泄漏流量变量（323），取决于蒸发排放系统中测量的蒸汽流量，同时保持水从燃料箱内部到大气的压力差为10“。 如果参考蒸汽流量变量和加压蒸汽和泄漏流量变量之间的差异大于预定的泄漏流量因子，则指示泄漏（327）。

公开(公告)号：EP0789836B1

公开(公告)日：2001-10-24

申请号：EP96918472.0

申请日：1996-06-12

Applicant: MOTOROLA INC.

Inventor： REMBOSKI, Donald, J. ,  PLEE, Steven, L. ,  WOZNICK, Mark, R. ,  FOLEY, John, Francis

IPC: G01M3/32

CPC classification number: F02M25/0809

Abstract: An apparatus and method of detecting a leak in an evaporative emissions system measures vapor flow out of the evaporative emissions system while maintaining a zero pressure difference from inside a fuel tank to atmosphere and provides a reference vapor flow variable dependent on the measurement (317). A pressurized vapor and leak flow variable is measured (323) dependent on measured vapor flow out of the evaporative emissions system while maintaining a pressure difference of 10'' of water from inside the fuel tank to atmosphere. A leak is indicated (327) if a difference between the reference vapor flow variable and the pressurized vapor and leak flow variable is greater than a predetermined leak flow factor.

公开(公告)号：EP0789836A1

公开(公告)日：1997-08-20

申请号：EP96918472.0

申请日：1996-06-12

Applicant: MOTOROLA INC.

Inventor： REMBOSKI, Donald, J. ,  PLEE, Steven, L. ,  WOZNICK, Mark, R. ,  FOLEY, John, Francis

IPC: F02M25

CPC classification number: F02M25/0809

Abstract: An apparatus and method of detecting a leak in an evaporative emissions system measures vapor flow out of the evaporative emissions system while maintaining a zero pressure difference from inside a fuel tank to atmosphere and provides a reference vapor flow variable dependent on the measurement (317). A pressurized vapor and leak flow variable is measured (323) dependent on measured vapor flow out of the evaporative emissions system while maintaining a pressure difference of 10'' of water from inside the fuel tank to atmosphere. A leak is indicated (327) if a difference between the reference vapor flow variable and the pressurized vapor and leak flow variable is greater than a predetermined leak flow factor.