About 13 results
https://drivepatents.com/patents/1381760 · 30 Apr 2026
A method for locating a fuel leak in a pressurized fuel system for a vehicle provided with a combustion engine includes: carrying out a first test to determine a fuel leak in the system including a first container and a second container that are openly con...
https://drivepatents.com/patents/1379336 · 12 Mar 2026
Methods and systems are presented for diagnosing operation of an evaporative emissions system that included two carbon filled fuel vapor storage canisters that are arranged in parallel. In one example, operation of a first canister vent valve, a second can...
https://drivepatents.com/patents/967968 · 29 Oct 2014
This invention relates to checking the integrity of a pressurised tank using pressure measurements obtained during a filling process. A measured pressure profile is compared with a reference pressure profile to determine whether the measured and reference ...
https://drivepatents.com/patents/981542 · 27 Nov 2013
It is proposed a method for detecting rapidly an absence of a leak in a fuel system mounted on board of a vehicle, the fuel system comprising a pressure sensor adapted to measure pressure comprised within a predetermined working range of pressure. The meth...
https://drivepatents.com/patents/1068657 · 5 Apr 2006
Pressure detection means detects the pressure of an evaporation purge system that includes a fuel tank and a communicating tube, which connects a canister for adsorbing and retaining fuel vapor to an intake pipe. Shutout means shuts out the evaporation pur...
https://drivepatents.com/patents/1071632 · 21 Dec 2005
An evaporative emissions control system (40a, 40b) for small internal combustion engines (28). The system generally includes a charcoal canister (122) and a carburetor (42, 170) with a fuel circuit shutoff valve (80, 222, 240). The charcoal canister is in ...
https://drivepatents.com/patents/1088217 · 7 Apr 2004
The method involves measuring pressure oscillations of the valve (2) and generating an output signal. A frequency analysis is performed on the signal to determine amplitude for the signal at an oscillation frequency. The oscillations amplitude is compared ...
https://drivepatents.com/patents/1091951 · 12 Nov 2003
A pressure responsive relief valve (38) is disposed in the tank vapor line to the engine inlet manifold (54) and upstream of an electric flow control valve (50). The pressure responsive valve (38) has a bleed orifice (42) for providing limited flow for lea...
https://drivepatents.com/patents/1097958 · 5 Mar 2003
The method enables operation of a fluid container whilst monitoring emissions and checking that the container is sealed. The temperature of the fluid relative to e.g. ambient temperature, is determined using calculation models, either continuously or cycli...
https://drivepatents.com/patents/1106704 · 13 Feb 2002
A remotely actuatable diagnostic valve biased normally open is disposed in the air inlet of a vehicle fuel tank vapor storage canister and a thermistor disposed to sense vapor temperature above the liquid level in the fuel tank. Upon engine shutdown, the v...