Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
  • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
  • B60K15/03—Fuel tanks
  • B60K15/035—Fuel tanks characterised by venting means
  • B60K15/03519—Valve arrangements in the vent line
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
  • B60K15/03—Fuel tanks
  • B60K15/035—Fuel tanks characterised by venting means
  • B60K2015/03561—Venting means working at specific times
  • B60K2015/03571—Venting during driving
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
  • B60K15/03—Fuel tanks
  • B60K15/035—Fuel tanks characterised by venting means
  • B60K2015/03561—Venting means working at specific times
  • B60K2015/03576—Venting during filling the reservoir
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/2931—Diverse fluid containing pressure systems
  • Y10T137/3003—Fluid separating traps or vents
  • Y10T137/3084—Discriminating outlet for gas
  • Y10T137/309—Fluid sensing valve
  • Y10T137/3099—Float responsive
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/86292—System with plural openings, one a gas vent or access opening
  • Y10T137/86324—Tank with gas vent and inlet or outlet

Definitions

• the fuel tank is generally connected to the activated carbon canister via an operating ventilation line, so that the gases escaping from the tank while driving and at a standstill during refueling are deposited in the activated carbon canister.
• a second refueling ventilation line of substantially larger cross-section is provided, which connects the tank filler neck to the activated carbon container.
• a flap is opened by inserting the fuel nozzle into the filler neck, which allows the gases generated during refueling and the gases displaced by the inflowing fuel to flow into the refueling ventilation line and thus into the activated carbon container.
• a seal is provided between the filler neck and the nozzle in the concepts under consideration so that the gases cannot pass into the atmosphere via the filler neck during the refueling process.
• Refueling vent line the risk that liquid fuel can get into the activated carbon canister via the refueling vent line in the event of a malfunction of the fuel nozzle, e.g. no shutdown when the tank is full or improperly overfilled the tank.
• This entry of liquid fuel into the activated carbon container results in a disturbance in the mixture formation and possibly also damage to the catalytic converter.
• a safety valve is arranged in the refueling ventilation line, which is intended to reliably prevent liquid fuel from entering the activated carbon canister.
• the invention has for its object to provide a safety valve, in particular for a refueling ventilation line between the tank filler neck and the activated carbon canister in a motor vehicle, which reliably prevents the entry of liquid fuel into the activated carbon canister.
• the solution of The object is achieved in that the safety valve used in the refueling ventilation line as
• Float valve is designed and that when fuel penetrates into the refueling ventilation line and thus into the safety valve, the outlet of the safety valve is closed via the float, the safety valve being provided with a nozzle which opens into the environment and is closed at normal pressure by a closure actuated by a membrane , the membrane at an increased pressure in the safety valve causes or supports opening of the closure opening into the environment on the environmental connector.
• the outlet of the valve to the activated carbon container is consequently first closed and then the closure which opens into the environment as a result of pressure build-up in the valve is opened and the fuel which has penetrated can escape into the environment.
• the float is pivotable about an axis of rotation arranged laterally below the outlet and is provided with a linkage which actuates a poppet valve at the valve outlet.
• a linkage which actuates a poppet valve at the valve outlet.
• the poppet valve itself can be guided in the outlet port via a guide rail.
• the linkage can be formed in a very simple manner from a bolt connected to the poppet valve and a sliding link connected to the float and surrounding the bolt.
• the float can be held in its end positions by a bistable spring. This prevents the float from opening the poppet valve too soon.
• the poppet valve only opens when the float's buoyancy has dropped below an adjustable value due to the fuel drain.
• the closure for the environmental connection is formed by a spring-loaded poppet valve which is actuated by the membrane arranged in the valve body via a linkage.
• the membrane works depending on the pressure in the valve. By closing the outlet to the activated carbon canister, pressure builds up in the valve. This pressure acts on the membrane, which opens the environmental valve via a lever linkage against the force of the closing spring.
• the environmental valve only opens at a pressure in the valve chamber at which the pressure force on the environmental valve body exceeds the force of the closing spring of the environmental valve.
• the channel mouth at the outlet can be inserted into the sealing seat of the poppet valve, so that both the outlet and the channel are closed by the poppet valve.
• the membrane is equipped with a damping function.
• an intermediate wall with a check valve for example a mushroom membrane, is inserted into the interior of the membrane and the secondary space formed by the cover and the intermediate wall is connected to the outlet via a secondary channel, the sealing surface of the mushroom membrane being provided with at least one throttle groove.
• the membrane can also be provided with a defined roughness or porosity.
• the membrane When the membrane is pressurized, the air volume of the interior is displaced over the lifting surface of the mushroom membrane to the activated carbon canister neck. After opening the valve on the environmental nozzle, the pressure in the safety valve is reduced and the fuel flows into the environment. In order to achieve complete emptying of the safety valve and the line from the filler neck, the entry of air into the space above the membrane is delayed by the throttle groove or a defined roughness in the contact area of the non-return membrane or counter surface, so that the environmental valve only with a time Delay closes again.
• valve housing in the region of the closure is designed as a depression, in order to prevent the gas present in the safety valve from flowing out when the environmental connector is opened and possibly fuel remaining in it.
• the depression ensures that the gas can only escape when the fuel level has dropped below the level of a housing edge arranged above it.
• Figure 2 shows a section along the line A-A of Figure 1 by the
• the safety valve 1 consists of the housing 2 with the inlet 3 and the outlet 4 and the environmental nozzle 5.
• the gases coming from the filler neck on the tank are fed from the refueling ventilation line to the inlet 3 at the valve 1 and pass through the outlet 4 into the line section to the activated carbon container ,
• the outlet 4 of the safety valve 1 is lockable, as is the environmental connector 5, which is closed under normal conditions by the closure 6.
• the outlet 4 is constantly open under normal conditions. It can be closed by the float 7 when fuel penetrates the safety valve 1.
• the penetrating fuel causes not only a closure of the outlet 4 via the float 7, but also an increase in the pressure in the safety valve 1.
• the increased pressure causes the membrane 8 to move upward, so that the membrane plate 9 with the membrane 8 occupies from its lower into the indicated upper position.
• the membrane 8 is connected to a linkage 10, via which the opening of the closure 6 is reached.
• the float 7 swivels about an axis of rotation 11 arranged laterally below the outlet 4 (see also FIGS. 2 and 3).
• a slide link 12 is attached to the float and, with its link slot 13, surrounds a pin 15 attached to the poppet valve 14 closing the outlet 4.
• the poppet valve 14 is guided over a three-leg guide rail 16 in the outlet port 17.
• the float 7 is provided with a bistable spring 18 which is attached with one leg 19 to the float 7, while the other leg 20 engages the crossbeam 21.
• the closure 6 is also designed as a poppet valve 25 and is pressed onto the valve seat by the spring 26.
• the membrane plate 9 is provided with the rod 27, the end of which acts in an articulated manner on the angle lever 29 which can be pivoted about the axis 28.
• the angle lever 29 actuates the tappet 30 of the poppet valve 25.
• the tappet 30 is guided in the crossbeam 31.
• the plunger 30 is provided with a crank 32 which is passed beneath the wall 33.
• the wall 33 serves as a gas barrier wall, so that 5 gases can only get into the environmental connection piece when the liquid level has dropped to below the lower edge of the barrier wall 33. This is further supported by the lower-shaped design of the entire housing 2, in which the housing with the deepest point is designed as a depression in the area of the closure 6.
• the membrane 8 is covered by the cover 35.
• the interior 36 created between the cover 35 and the membrane 8 is connected to the outlet 4 via the channel 37.
• the channel mouth 38 is inserted at the outlet 4 in the sealing seat 39 of the poppet valve seat so that the poppet valve 14 both the outlet 4 and the channel 37 closes. This prevents the closure 6 from closing prematurely before the outlet 4 has been opened.
• a lost motion can be inserted into the linkage so that it works with a delay. Then the channel 37 can be omitted and the secondary channel 43 is sufficient. The inherent rigidity of the membrane 8 is sufficient as counter pressure to push back the linkage and close the environmental valve.
• a further improvement in the damping effect when the closure 6 of the environmental connector 5 is closed is achieved by inserting an intermediate wall 40 into the interior 36 between the membrane 8 and the cover 35, which is provided with a mushroom membrane 41.
• An auxiliary space 42 is then formed between the cover 35 and the intermediate wall 40 with mushroom membrane 41.
• This auxiliary space 42 is connected to the outlet connection 17 via the auxiliary duct 43.
• the sealing surface of the mushroom membrane 41 which bears against the intermediate wall 40, is provided with at least one throttle groove, through which gas can flow into the interior 36 from the nozzle 17 with a delay.
• the mushroom membrane 41 thus causes a rapid exit of the gases from the space 36 through the openings 44 in the intermediate wall 40 into the adjoining space 42 and from there through the channel 43 into the connector 17. While in the other direction the gases flow in via the channel 43 the adjoining room 42 and the throttle furrows not shown in detail on the sealing surface of the mushroom membrane 41 is considerably delayed.
• the membrane 8 only acts when the valve 6 is closed.
• the safety valve acts as a direct overflow valve.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Life Sciences & Earth Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Self-Closing Valves And Venting Or Aerating Valves (AREA)
• Safety Valves (AREA)
• Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
• Loading And Unloading Of Fuel Tanks Or Ships (AREA)
• Float Valves (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Cites Families (12)

• 1999
  • 1999-07-31 DE DE19936161A patent/DE19936161C1/de not_active Expired - Fee Related
• 2000
  • 2000-04-20 WO PCT/EP2000/003603 patent/WO2001008917A1/de active IP Right Grant
  • 2000-04-20 CA CA002408354A patent/CA2408354C/en not_active Expired - Fee Related
  • 2000-04-20 BR BR0008325-9A patent/BR0008325A/pt active Search and Examination
  • 2000-04-20 CN CNB008039623A patent/CN1189341C/zh not_active Expired - Fee Related
  • 2000-04-20 KR KR10-2001-7012740A patent/KR100444203B1/ko not_active IP Right Cessation
  • 2000-04-20 HU HU0201938A patent/HUP0201938A2/hu unknown
  • 2000-04-20 AU AU45540/00A patent/AU761724B2/en not_active Ceased
  • 2000-04-20 EP EP00927007A patent/EP1200281A1/de not_active Withdrawn
  • 2000-04-20 US US09/980,448 patent/US6591856B1/en not_active Expired - Fee Related
  • 2000-04-20 JP JP2001514150A patent/JP3692323B2/ja not_active Expired - Fee Related
  • 2000-04-20 TR TR2001/03496T patent/TR200103496T2/xx unknown
• 2001
  • 2001-09-28 NO NO20014735A patent/NO20014735L/no not_active Application Discontinuation
  • 2001-11-08 ZA ZA200109240A patent/ZA200109240B/en unknown
  • 2001-12-14 BG BG106223A patent/BG64548B1/bg unknown

Non-Patent Citations (1)

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