CN105904962A - Fuel oil liquid level valve device - Google Patents

Fuel oil liquid level valve device Download PDF

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Publication number
CN105904962A
CN105904962A CN201610338969.9A CN201610338969A CN105904962A CN 105904962 A CN105904962 A CN 105904962A CN 201610338969 A CN201610338969 A CN 201610338969A CN 105904962 A CN105904962 A CN 105904962A
Authority
CN
China
Prior art keywords
liquid level
guard ring
fuel oil
level valve
floating guard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610338969.9A
Other languages
Chinese (zh)
Inventor
李春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stant Automotive Systems (suzhou) Co Ltd
Original Assignee
Stant Automotive Systems (suzhou) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stant Automotive Systems (suzhou) Co Ltd filed Critical Stant Automotive Systems (suzhou) Co Ltd
Priority to CN201610338969.9A priority Critical patent/CN105904962A/en
Publication of CN105904962A publication Critical patent/CN105904962A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K2015/03256Fuel tanks characterised by special valves, the mounting thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K2015/03328Arrangements or special measures related to fuel tanks or fuel handling
    • B60K2015/03361Arrangements or special measures related to fuel tanks or fuel handling for checking the quality or quantity of fuel during filling of fuel tank
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K2015/03328Arrangements or special measures related to fuel tanks or fuel handling
    • B60K2015/03388Arrangements or special measures related to fuel tanks or fuel handling in case of a roll over of the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K15/035Fuel tanks characterised by venting means
    • B60K2015/03561Venting means working at specific times
    • B60K2015/03576Venting during filling the reservoir

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

The invention provides a fuel oil liquid level valve device which comprises an upper cover, a floating protective ring fixedly connected with the upper cover, a film fixed into the upper cover, a film supporting board, a fuel oil recognizer fixed into the floating protective ring, a refueling floater and an operation loss floater. The refueling floater and the operation loss floater are elastically fixed into the floating protective ring. The film supporting board is fixed between the film and the fuel oil recognizer. Due to the fact that three types of control valves including the FLV, the GRV and the FMV are integrated in the fuel oil liquid level valve device, the fuel oil adding amount is accurately controlled through the fuel oil liquid level valve device, and the height error of an oil adding liquid level is smaller than 1 mm. In a various-angle traveling state and even in a rollover state of a vehicle, generated fuel oil steam can be effectively sealed in an oil tank in time. According to the actual condition, the amount of fuel oil steam entering a carbon tank is accurately adjusted, the service life of the carbon tank is prolonged, the HC penetrating quality is low, and cost is reduced.

Description

Fuel liquid level valve gear
Technical field
The invention belongs to automotive fuel oil system, particularly relate to a kind of fuel liquid level valve gear.
Background technology
Environmental pollution is on the rise, and reduces the exhaust emission of vehicle, has improved ambient air quality Become the most instant problem.The EVAP exhaust emission of vehicle is mainly derived from three Aspect: one is the discharge vaporization produced of taking a breath round the clock;Two is the evaporation row of the infiltration generation of material Put;Three is the discharge vaporization produced in vehicle refueling process.Generally fuel system is by combustion Oil liquid level limit valve FLV (Fuel Limit Valve) control the amount of fuel in refueling process and Its steam;By under Tipping valve GRV (Grade Rollover Valve) protection overturning state Fuel oil and steam can be sealed in fuel tank internal;By traffic management valve FMV (Flow Management Valve) control refueling process leads to the fuel vapor amount of canister, reduce and steam Send a manuscript to the compositor and put.
But the error that FLV controls volume read-out is bigger;GRV controls the various transport condition of vehicle Under ageing poor;FMV also can not accurately control to lead to the vapor flow rate of canister, increases Canister volume, reduces the service life of canister.
Therefore, it is necessary to design a kind of new fuel liquid level valve gear.
Summary of the invention
It is an object of the invention to provide tri-sections of control valve collection of a kind of integrated FLV, GRV and FMV Become one, the fuel liquid level valve dress of Hydrocarbon (HC) permeance property, reduction cost Put.
The present invention provides a kind of fuel liquid level valve gear, comprising: upper cover is fixed with this upper cover The floating guard ring, the diaphragm being fixed in this upper cover, the diaphragm support plate that connect, be fixed on described Fuel oil evaluator in floating guard ring, add oil float and running losses floats, wherein, described in add Oil float and running losses float equal flexible fastening in floating guard ring;Described diaphragm support plate is fixed on Between diaphragm and fuel oil evaluator.
Preferably, described diaphragm support plate is provided with through hole;Described fuel oil evaluator is provided with and is connected to Protuberance in this through hole.
Preferably, also include connecting this upper cover and the welding ring of floating guard ring, being positioned at upper cover and weldering Sealing ring between T-Ring.
Preferably, also including the snap ring that this upper cover is fixing, described diaphragm is fixed by this snap ring.
Preferably, described upper cover includes: be positioned at the canister that the cover body of centre is connected with this cover body Oil filler pipe joint that interface is connected with this cover body and the blow vent being connected with this cover body, its In, described snap ring is fixed on the inside of this cover body.
Preferably, described floating guard ring includes: be positioned at the floatation bodies outside this floating guard ring, It is positioned at the bottom bottom this floating guard ring, is positioned at this floating guard ring inside and is connected with floatation bodies The first dividing plate, be positioned at this floating guard ring internal and be connected with described first dividing plate second every Plate and the 3rd dividing plate being positioned at inside this floating guard ring and being connected with described bottom.
Preferably, described fuel oil evaluator be fixed on described first dividing plate and diaphragm support plate it Between.
Preferably, described oiling trim in the bottom of floating guard ring and first every between.
Preferably, described running losses floats and is arranged on second partition and encloses in the space set.
Preferably, described running losses trim in the second partition of floating guard ring and the 3rd dividing plate it Between.
The present invention is by being integrated in this fuel liquid level valve by tri-sections of control valves of FLV, GRV and FMV Device, this fuel liquid level valve gear accurately controls fuel oil refueling amount so that refuel liquid level by mistake Difference is less than 1mm;The various angle of vehicle of the present invention travels can be timely and effective under even overturning state The fuel vapor of generation is sealed in fuel tank internal;The present invention, according to actual state, accurately adjusts Joint leads to the fuel vapor amount of canister, improves the service life of canister, relatively low Hydrocarbon (HC) permeance property and reduction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of fuel liquid level valve gear of the present invention;
Fig. 2 is the top view of fuel liquid level valve gear shown in Fig. 1;
Fig. 3 is the upward view of fuel liquid level valve gear shown in Fig. 1;
Fig. 4 is fuel liquid level valve gear sectional view at A-A shown in Fig. 3.
Figure number illustrates:
1-upper cover, 11-cover body, 12-canister interface, 13-oil filler pipe joint, 14-blow vent,
2-floating guard ring, 21-floatation bodies, 22-bottom, 23-the first dividing plate,
24-second partition, 25-the 3rd dividing plate, 26-the first spring, 27-the second spring,
3-welding ring, 4-sealing ring, 5-snap ring, 6-diaphragm, 7-diaphragm support plate,
8-fuel oil evaluator, 9-add oil float, 10-running losses floats.
Detailed description of the invention
The present invention provides a kind of fuel liquid level valve gear, and it limits steam for multifunction burning oil liquid level Circulation management valve gear (MFLVV, Multi-Fuel Limit Vent Valve), this fuel oil Liquid level valve device is arranged between automobile canister and oil filling pipe.
Referring to shown in Fig. 1 to Fig. 4, this fuel liquid level valve gear includes: upper cover 1 and should Upper cover 1 is fixed the floating guard ring 2 of connection, is connected this upper cover 1 and the welding ring of floating guard ring 2 3, sealing ring 4 between upper cover 1 and welding ring 3 and the fixing snap ring 5 of this upper cover 1, It is fixed on the diaphragm 6 on this snap ring 5, supports the diaphragm support plate 7 of this diaphragm 6, be positioned at stream Buret is managed the fuel oil evaluator 8 between valve 7 and floating guard ring 2, is positioned at floating guard ring 2 Add oil float 9 and the running losses that is fixed in this floating guard ring 2 floats 10.Wherein, diaphragm Gripper shoe 7 is fixed between diaphragm 6 and fuel oil evaluator 8;Add oil float 9 and running losses floats 10 equal flexible fastenings are in floating guard ring 2.
The centre of diaphragm support plate 7 is provided with through hole 71;Fuel oil evaluator 8 is provided with and is connected to this Protuberance 81 in through hole 71, this protuberance 81 is projected by the centre of this fuel oil evaluator 8 Formed.By controlling the pore size between through hole 71 and protuberance 81, reach accurately to control Fuel vapor leads to the flow of canister, reduces canister volume, increases the service life of canister.
Add oil float 9 and running losses to float 10 be fuel oil buoy, be also the biography of fuel liquid level height Induction device, add oil float 9 and running losses to float 10 be fuel liquid level detecting system.
This upper cover 1 is made of plastics, and upper cover 1 includes: is positioned at the cover body 11 of centre and is somebody's turn to do Cover body 11 connect canister interface 12 be connected with this cover body 11 oil filler pipe joint 13, with And the blow vent 14 being connected with this cover body 11.Wherein, snap ring 5 is fixed on this cover body 11 Internal.
Welding ring 3 is made up of high density polyethylene (HDPE);Sealing ring 4 is made up of fluorubber;Diaphragm 6, Add oil float 9 and running losses floats 10 and made by nylon material or rubber;Diaphragm support plate 7 Make by acetal plastic with fuel oil evaluator 8.
Floating guard ring 2 is also made of plastics, and it is generally cylindrical, floats with this in upper cover 1 Between dynamic guard ring 2, there is receiving space, snap ring 5, diaphragm 6, diaphragm support plate 7, fuel oil Evaluator 8, add oil float 9 and running losses floats 10 and is respectively positioned in this receiving space.
Floating guard ring 2 includes: is positioned at the floatation bodies 21 outside this floating guard ring, is positioned at this Bottom 22 bottom floating guard ring 2, be positioned at this floating guard ring 2 internal and with floatation bodies 21 The first dividing plate 23 of connecting, to be positioned at this floating guard ring 2 internal and be connected with the first dividing plate 23 Second partition 24 and be positioned at this floating guard ring 2 internal and be connected with bottom 22 the 3rd every Plate 25, second partition 24 is in column.
Fuel oil evaluator 8 is fixed on the first dividing plate 23 and the diaphragm support plate 7 of floating guard ring 2 Between;Add oil float 9 to be fixed on the bottom 22 of floating guard ring 2 by the first spring 26, and This adds oil float 9 between bottom 22 and first dividing plate 23 of floating guard ring 2;Running losses Floating 10 are fixed on the 3rd dividing plate 25 of floating guard ring 2 by the second spring 27, and this fortune Row loss floating 10 is arranged on second partition 24 and encloses in the space set, and this running losses floats 10 Between second partition 24 and the 3rd dividing plate 25.
In the present invention, diaphragm support plate 7 controls to lead in refueling process the fuel oil steaming of canister Tolerance, it has traffic management valve (FMV, Flow Management Valve) function;Fuel oil Evaluator 8 is as Tipping valve (GRV, Grade Rollover Valve), and it protects overturning shape Fuel oil and steam thereof under state can be sealed in fuel tank internal;Add oil float 9 and running losses floats 10 all limit valve (FLV, Fuel Limit Valve) as fuel liquid level, add for control Amount of fuel during oil and steam thereof.
When this fuel liquid level valve gear is refueled by nozzle, add oil float 9 when the cross section of fuel oil is positioned at During place, add oil float 9 and be in sealing state by the immixture of fuel oil and steam, cause fuel tank Internal pressure sharply increases, and excites nozzle to jump rifle for the first time this moment.Between at regular intervals after, Fuel tank internal and external pressure balance, can continue to refuel, and along with liquid level continues to rise, running losses floats 10 float seals, and tank internal pressure sharply increases again, excites nozzle second this moment Secondary jumping rifle.This fuel liquid level valve gear adds oil float 9 by control and running losses float 10 weight Amount, accurately control volume read-out number, within error is decreased to 1mm.
When vehicle is during normal traveling, adds oil float 9 by control and running losses floats The pore size of 10, can accurately control fuel vapor and lead to the flow of canister, reduce canister Volume, increases the service life of canister.That is, controlled by diaphragm support plate 7.
When vehicle travels at complex road condition, occur the when that various angle tilting.Add oil float 9, Running losses float 10 and fuel oil evaluator 8 close in time so that vehicle under complex road condition, Under the situation even overturned, fuel oil and Vapor Seal thereof are discharged at valve inner, minimizing steam, Improve the canister life-span.
The present invention is by being integrated in this fuel liquid level valve by tri-sections of control valves of FLV, GRV and FMV Device, this fuel liquid level valve gear accurately controls fuel oil refueling amount so that refuel liquid level by mistake Difference is less than 1mm;The various angle of vehicle of the present invention travels can be timely and effective under even overturning state The fuel vapor of generation is sealed in fuel tank internal;The present invention, according to actual state, accurately adjusts Joint leads to the fuel vapor amount of canister, improves the service life of canister, relatively low Hydrocarbon (HC) permeance property and reduction cost.
Above the specific embodiment of the present invention is described in detail, but content has been only the present invention The exemplary embodiments created, it is impossible to be considered the practical range for limiting the invention.All The impartial change made according to the invention application range and improvement etc., all should still belong to this Within bright patent covering scope.

Claims (10)

1. a fuel liquid level valve gear, it is characterised in that: comprising: upper cover and this on Cover is fixed the floating guard ring connected, the diaphragm being fixed in this upper cover, diaphragm support plate, is fixed Fuel oil evaluator in described floating guard ring, add oil float and running losses floats, wherein, Described add oil float and running losses floats equal flexible fastening in floating guard ring;Described diaphragm support plate It is fixed between diaphragm and fuel oil evaluator.
Fuel liquid level valve gear the most according to claim 1, it is characterised in that: described Diaphragm support plate is provided with through hole;Described fuel oil evaluator is provided be connected in this through hole prominent Portion.
Fuel liquid level valve gear the most according to claim 1, it is characterised in that: also wrap Include and connect this upper cover and the welding ring of floating guard ring, sealing between upper cover and welding ring Circle.
Fuel liquid level valve gear the most according to claim 1, it is characterised in that: also wrap Including the snap ring that this upper cover is fixing, described diaphragm is fixed by this snap ring.
Fuel liquid level valve gear the most according to claim 4, it is characterised in that: described Upper cover includes: be positioned at canister interface and this cover body company that middle cover body is connected with this cover body The oil filler pipe joint connect and the blow vent being connected with this cover body, wherein, described snap ring is fixed Inside at this cover body.
Fuel liquid level valve gear the most according to claim 1, it is characterised in that: described Floating guard ring includes: is positioned at the floatation bodies outside this floating guard ring, is positioned at the bottom of this floating guard ring The bottom in portion, be positioned at this floating guard ring internal and be connected with floatation bodies the first dividing plate, be positioned at This floating guard ring is internal and the second partition that is connected with described first dividing plate and be positioned at this floating Guard ring inside the 3rd dividing plate being connected with described bottom.
Fuel liquid level valve gear the most according to claim 6, it is characterised in that: described Fuel oil evaluator is fixed between described first dividing plate and diaphragm support plate.
Fuel liquid level valve gear the most according to claim 6, it is characterised in that: described Refuel trim in the bottom of floating guard ring and first every between.
Fuel liquid level valve gear the most according to claim 6, it is characterised in that: described Running losses floats and is arranged on second partition and encloses in the space set.
Fuel liquid level valve gear the most according to claim 6, it is characterised in that: described Running losses trim is between the second partition and the 3rd dividing plate of floating guard ring.
CN201610338969.9A 2016-05-20 2016-05-20 Fuel oil liquid level valve device Pending CN105904962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610338969.9A CN105904962A (en) 2016-05-20 2016-05-20 Fuel oil liquid level valve device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610338969.9A CN105904962A (en) 2016-05-20 2016-05-20 Fuel oil liquid level valve device

Publications (1)

Publication Number Publication Date
CN105904962A true CN105904962A (en) 2016-08-31

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ID=56748309

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610338969.9A Pending CN105904962A (en) 2016-05-20 2016-05-20 Fuel oil liquid level valve device

Country Status (1)

Country Link
CN (1) CN105904962A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106917701A (en) * 2017-04-20 2017-07-04 苏州欧迪科汽车设计有限公司 A kind of multifunctional control valve

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000044099A (en) * 1998-12-30 2000-07-15 정주호 Structure of control valve for fuel tank in vehicle
US20020144730A1 (en) * 2001-04-09 2002-10-10 Brock Michael S. Fuel tank vent system
US20030047835A1 (en) * 1999-06-01 2003-03-13 Nancy Amburgey Method for forming a weldable mount for fuel systems component
US20030106586A1 (en) * 2001-12-06 2003-06-12 Gary Dunkle Weldable mount for fuel system component
US20030230288A1 (en) * 2002-06-13 2003-12-18 Timothy King Dual float valve for fuel tank vent with liquid carryover filter
DE69818070T2 (en) * 1997-05-06 2004-06-24 Stant Manufacturing Inc., Connersville TANK VENT CONTROL SYSTEM
CN201342934Y (en) * 2009-02-10 2009-11-11 宁波三浪环球车辆部件有限公司 Automobile fuel-saving intelligent management device
CN205651962U (en) * 2016-05-20 2016-10-19 斯丹德汽车系统(苏州)有限公司 Fuel liquid level valve gear

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69818070T2 (en) * 1997-05-06 2004-06-24 Stant Manufacturing Inc., Connersville TANK VENT CONTROL SYSTEM
KR20000044099A (en) * 1998-12-30 2000-07-15 정주호 Structure of control valve for fuel tank in vehicle
US20030047835A1 (en) * 1999-06-01 2003-03-13 Nancy Amburgey Method for forming a weldable mount for fuel systems component
US20020144730A1 (en) * 2001-04-09 2002-10-10 Brock Michael S. Fuel tank vent system
US20030106586A1 (en) * 2001-12-06 2003-06-12 Gary Dunkle Weldable mount for fuel system component
US20030230288A1 (en) * 2002-06-13 2003-12-18 Timothy King Dual float valve for fuel tank vent with liquid carryover filter
CN201342934Y (en) * 2009-02-10 2009-11-11 宁波三浪环球车辆部件有限公司 Automobile fuel-saving intelligent management device
CN205651962U (en) * 2016-05-20 2016-10-19 斯丹德汽车系统(苏州)有限公司 Fuel liquid level valve gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106917701A (en) * 2017-04-20 2017-07-04 苏州欧迪科汽车设计有限公司 A kind of multifunctional control valve

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Application publication date: 20160831