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US 6,474,314 B1Granted
Fuel system with intergrated pressure management
AssigneeSiemens Canada Limited
InventorsPaul D. Perry, John E. Cook
Life of this patent
Estimating the term…
Abstract
A fuel system supplying fuel to an internal combustion engine of a vehicle. The fuel system includes an integrated pressure management system managing pressure and detecting leaks in the fuel system. The integrated pressure management system also performs a leak diagnostic for the headspace in a fuel tank, a canister that collects volatile fuel vapors from the headspace, a purge valve, and all associated hoses and connections.
Claims15
A fuel system for supplying fuel to an internal combustion engine of a vehicle, the fuel system comprising:
- a fuel tank having a headspace;
- an intake manifold in fluid communication with the headspace;
- a charcoal canister in fluid communication with the headspace;
- a purge valve having a first side in fluid communication with the intake manifold and having a second side in fluid communication with the charcoal canister and with the headspace;
- and
- an integrated pressure management system including:
- a housing connected to the charcoal canister and defining an interior chamber, the housing defining a signal chamber in fluid communication with the charcoal canister;
- a pressure operable device separating the chamber into a first portion and a second portion, the first portion communicating with the charcoal canister, the second portion communicating with a vent port, the pressure operable device permitting fluid communication between the charcoal canister and the vent port in a first configuration and preventing fluid communication between the charcoal canister and the vent port in a second configuration, the pressure operable device separating the signal chamber from the second portion of the interior chamber;
- and
- a switch signaling displacement of the pressure operable device in response to negative pressure at a first pressure level in the charcoal canister.
7 more elements
A fuel system for supplying fuel to an internal combustion engine of a vehicle, the fuel system comprising:
- a fuel tank having a headspace;
- an intake manifold in fluid communication with the headspace;
- a charcoal canister in fluid communication with the headspace;
- a purge valve having a first side in fluid communication with the intake manifold and having a second side in fluid communication with the charcoal canister and with the headspace;
- and
- an integrated pressure management system including:
- a housing connected to the charcoal canister and defining an interior chamber;
- a pressure operable device separating the chamber into a first portion and a second portion, the first portion communicating with the charcoal canister, the second portion communicating with a vent port, the pressure operable device permitting fluid communication between the charcoal canister and the vent port in a first configuration and preventing fluid communication between the charcoal canister and the vent port in a second configuration;
- a switch signaling displacement of the pressure operable device in response to negative pressure at a first pressure level in the charcoal canister;
- and
- a poppet preventing fluid communication between the charcoal canister and the vent port in the second configuration;
- a spring biasing the poppet toward the second configuration;
- and
- a diaphragm separating the second portion of the interior chamber from a signal chamber in fluid communication with the charcoal canister.
11 more elements
A fuel system for supplying fuel to an internal combustion engine of a vehicle, the fuel system comprising:
- a fuel tank having a headspace;
- an intake manifold in fluid communication with the headspace;
- a charcoal canister in fluid communication with the headspace;
- a purge valve having a first side in fluid communication with the intake manifold and having a second side in fluid communication with the charcoal canister and with the headspace;
- and
- an integrated pressure management system including:
- a housing connected to the charcoal canister and defining an interior chamber;
- a pressure operable device separating the chamber into a first portion and a second portion, the first portion communicating with the charcoal canister, the second portion communicating with a vent port, the pressure operable device permitting fluid communication between the charcoal canister and the vent port in a first configuration and preventing fluid communication between the charcoal canister and the vent port in a second configuration;
- a switch signaling displacement of the pressure operable device in response to negative pressure data first pressure level in the charcoal canister;
- and
- a solenoid displacing the device from the first configuration to the second configuration, the solenoid including a stator extending transversely with respect to a displacement direction of the device between the first and second configurations.
8 more elements
A fuel system for supplying fuel to an internal combustion engine of a vehicle, the fuel system comprising:
- a fuel tank having a headspace;
- an intake manifold in fluid communication with the headspace;
- a charcoal canister in fluid communication with the headspace;
- a purge valve having a first side in fluid communication with the intake manifold and having a second side in fluid communication with the charcoal the canister and with the headspace;
- and
- an integrated pressure management system including:
- a housing connected to the charcoal canister and defining an interior chamber and a signal chamber;
- a pressure operable device separating the chamber into a first portion and a second portion, the first portion communicating with the charcoal canister, the second portion communicating with a vent port, the pressure operable device permitting fluid communication between the charcoal canister and the vent port in a first configuration and preventing fluid communication between the charcoal canister and the vent port in a second configuration;
- a switch signaling displacement of the pressure operable device in response to negative pressure at a first pressure level in the charcoal canister;
- and
- a solenoid displacing the device from the first configuration to the second configuration, the charcoal canister communicating with the signal chamber via a passage defined at least in part by a void between the housing and the solenoid.
8 more elements
Dependencies are inferred from the claim text.