System and method for detecting leaks in a vapor handling system

Details System and method for detecting leaks in a vapor handling system System and method for detecting leaks in a vapor handling system

1992-10-29

1993-11-23

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123198D, F02M 3302, F02B 7700

Patent

active

052634620

ABSTRACT:
This invention relates to a diagnostic system that detects a leak in an engine vapor handling system by checking whether a predetermined pressure or vacuum is attained in a fuel tank when a corresponding temperature change occurs in the fuel tank while the engine was not running.

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Siemens documents-OBDII Systems and Components (16 pages) Aug. 28, 1992.
Siemens documents-Proposal for Pressure Testing the Evaporative System (OBDII) (18 pages) May 11, 1992.

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