CN201004005Y

CN201004005Y - Car fuel supply system leakage and ventilation detection device

Info

Publication number: CN201004005Y
Application number: CNU2006200262255U
Authority: CN
Inventors: 陈乃克
Original assignee: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INST Co Ltd
Current assignee: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD.
Priority date: 2006-05-31
Filing date: 2006-05-31
Publication date: 2008-01-09
Anticipated expiration: 2016-05-31

Abstract

A leak and aeration checkout device of a fuel feeding system of a vehicle is communicated with in turn a hand valve, a filter, a first pressure regulating valve, a first manometer, a second pressure regulating valve, a second manometer, an automatic pressure regulator APU, a pressure pickup, an airproof leak detector and a detecting port with the air of 700k Pa pressure as a test air supply and through the pipeline. An air control valve is connected with the airproof leak detector in parallel which is communicated with the pipeline between the first manometer and the second pressure regulating valve, and an air clamping fixture is also communicated with the pipeline between the first manometer and the second pressure regulating valve through a second electromagnetic valve. The pressure pickup and the airproof leak detector respectively connect with the automatic pressure regulator APU with the leads. The utility model has the advantage that the setup is scientific, reasonable, simple, practical, and easy to be fixed and operated. Moreover the utility model provides a practical device for the capability detection of the fuel feeding system of the vehicle.

Description

The vehicle fuel feed system leaks and the ventilation pick-up unit

(1) technical field

The utility model relates to a kind of vehicle fuel feed system pick-up unit, and particularly a kind of vehicle fuel feed system leaks and the ventilation pick-up unit

(2) background technology

The fuel oil supply system of automobile mainly is made up of fuel tank, canister and oil pump and associated ping thereof.In order to detect the performance of vehicle fuel feed system, main method is to utilize leakage detecting instrument that the fuel oil supply system of automobile is leaked and Ventiation Testing at present.For improving ambient air quality, the emission request to automobile exhaust contaminant is progressively improving in China.Will be according to the concerned countries standard, to the detection of leaking and ventilate of the fuel oil supply system of automobile,, just need provide corresponding vehicle fuel feed system to leak and the ventilation pick-up unit to reach European II pollutant emission standard.

(3) summary of the invention

The purpose of this utility model is at above-mentioned situation, provides a kind of vehicle fuel feed system to leak and the ventilation pick-up unit.

The technical solution of the utility model

A kind of vehicle fuel feed system leaks and the ventilation pick-up unit, it is characterized in that: with air as the test source of the gas, pass through pipeline, successively with hand valve, filtrator, first pressure regulator valve, first tensimeter, second pressure regulator valve, second tensimeter, automatic pressure controller APU, pressure transducer, airtight leak locator and detection port communicate, Pneumatic valve also communicates with pipeline between first tensimeter and second pressure regulator valve through first solenoid valve by pipeline and airtight leak locator Pneumatic valve simultaneously in parallel, airtight leak locator communicates with pipeline between first tensimeter and second pressure regulator valve by pipeline, the pneumatic pinch anchor clamps by pipeline through second solenoid valve also with first tensimeter and second pressure regulator valve between pipeline communicate; Pressure transducer links to each other with automatic pressure controller APU respectively by lead with airtight leak locator.

Principle of work of the present utility model:

Operating personnel at first cut-in pressure are the 700kPa source of the gas, open hand valve then, and source of the gas is inserted pneumatic circuit; After filtering by filtrator, regulate first pressure regulator valve pressure is transferred to pressure about 300kPa, the force value of adjusting can be observed by first tensimeter; Test pressure size according to the vehicle fuel feed system requires transfers to convenient pressure with second pressure regulator, and force value can be observed by second tensimeter; Automatic pressure controller APU and pressure transducer decomposition pressure closed-loop control system, the big I of controlled pressure is set by airtight leak locator; First solenoid valve is used to control the cut-out of Pneumatic valve or open; Second solenoid valve is used to control the clamping of pneumatic pinch anchor clamps or unclamp; Airtight leak locator has two effects: the one, and for detection that the vehicle fuel feed system that is connected to port is leaked and ventilates, the 2nd, as the controller of automatic pressure controller APU.

The utility model has the advantages that: be provided with scientific and reasonablely, simple possible is convenient to install and operation, is the Performance Detection of vehicle fuel feed system, and a kind of available device conscientiously is provided.This pick-up unit also can carry out parameter modification according to user's needs simultaneously, leaks and Ventiation Testing with the equivalent substitution method, to save time; The way of also available increase port and pneumatic clamping device is carried out the test of many chassis; This test unit also can be applicable to the detection that the heavy goods vehicles fuel oil supply system leaks and ventilates by revising parameter in addition.

(4) description of drawings

The vehicle fuel feed system leaks and ventilation pick-up unit synoptic diagram.

Among the figure: solid line is that gas circuit connects, and dotted line is that circuit connects.

(5) embodiment

Embodiment:

A kind of vehicle fuel feed system leaks and the ventilation pick-up unit, and the air that with pressure is 700kPa is as the test source of the gas, carries out being connected of parts and pipeline and circuit according to the setting of accompanying drawing.Wherein, as the hand valve of gas source switch, the VHS400-02 hand valve of selecting for use SMC company to produce; The filtrator that source of the gas filters is selected for use the AFM30-02-R filtrator of SMC company production; The AR25-02B pressure regulator valve that first pressure regulator valve selects for use SMC company to produce; The IR2000-02 pressure regulator valve that second pressure regulator valve selects for use SMC company to produce; The G46-10-02M-C tensimeter that first tensimeter and second tensimeter select for use SMC company to produce; The 35A-SCC-DDAA-1BA solenoid valve that first solenoid valve and second solenoid valve all select for use MAC company to produce; The APU-90W product that automatic pressure controller APU selects for use Japanese Feitian company to produce; The SX-100D product that pressure transducer selects for use Japanese Feitian company to produce; The FL-601 product that airtight leak locator selects for use Japanese Feitian company to produce; Pneumatic valve, i.e. gas control valve does not generate heat in the work and can avoid influence to gaseous tension, the 001252B product of selecting for use BURKERT company to produce; Pneumatic pinch anchor clamps, its effect are to connect vehicle fuel feed system atmosphere the pipeline of eating dishes without rice or wine is cut off or opens the pneumatic pinch anchor clamps series of products of selecting for use rich beneficial (Tianjin) pneumatics research institute to produce.In the accompanying drawing, solid line is that gas circuit connects, and dotted line is that circuit connects.

Use example 1: vehicle fuel feed system leakage detection method

Carry out according to the following steps: 1. the reservoir port that will not adorn gasoline links to each other with detection port, with connecting the automobile canister atmosphere pipeline of eating dishes without rice or wine is placed on the pneumatic pinch anchor clamps, and allow the pipeline of pneumatic pinch clamp to eating dishes without rice or wine by second solenoid valve energising, prevent ventilation; 2. operating personnel's cut-in pressure is the source of the gas of 700kPa, open hand valve then, source of the gas is inserted pneumatic circuit, after filtering by filtrator, regulate first pressure regulator valve pressure is transferred to suitable pressure (generally being transferred to about 300kPa), the force value of adjusting can be observed by first tensimeter; 3. the test pressure size that requires according to the vehicle fuel feed system transfers to convenient pressure (generally being transferred to about 100kPa) with second pressure regulator, and force value can be observed by second tensimeter, and this pressure is as the input pressure of automatic pressure controller APU; 4. open Pneumatic valve by the energising of first solenoid valve, pressure transducer is communicated with the vehicle fuel feed system that is connected on port, to accelerate aeration speed, by airtight leak locator control automatic pressure controller APU, the internal pressure of fuel oil supply system is controlled at pressure such as the 5kPa higher slightly than 3.63kPa, pressure transducer and automatic pressure controller APU decomposition pressure closed-loop control system; 5. after equal pressure is stablized, close Pneumatic valve by the outage of first solenoid valve, airtight leak locator drops to 3.63kPa with pressure control from 5kPa by automatic pressure controller APU again, the purpose of doing like this is gas heating when reducing pressurising time and pressurising, after equal pressure was stable, the fuel oil supply system that airtight leak locator is docked at port carried out Leak Off Test (LOT).Internal pressure must not reduce greater than 0.49kPa in 5 minutes, with this as acceptability criteria.

Use example 2: vehicle fuel feed system ventilation detection method

Carry out according to the following steps: 1. the reservoir port that will not adorn gasoline links to each other with detection port, with connecting the automobile canister atmosphere pipeline of eating dishes without rice or wine is placed on the pneumatic pinch anchor clamps, and allow the pipeline of pneumatic pinch clamp to eating dishes without rice or wine by second solenoid valve energising, prevent ventilation; 2. operating personnel's cut-in pressure is the source of the gas of 700kPa, open hand valve then, source of the gas is inserted pneumatic circuit, after filtering by filtrator, regulate first pressure regulator valve pressure is transferred to suitable pressure (generally being transferred to about 300kPa), the force value of adjusting can be observed by first tensimeter; 3. the test pressure size that requires according to the vehicle fuel feed system transfers to convenient pressure (generally being transferred to about 100kPa) with second pressure regulator, and force value can be observed by second tensimeter, and this pressure is as the input pressure of automatic pressure controller APU; 4. open Pneumatic valve by the energising of first solenoid valve, pressure transducer is communicated with the vehicle fuel feed system that is connected on port, to accelerate aeration speed, by airtight leak locator control automatic pressure controller APU, the internal pressure of fuel oil supply system is controlled at pressure such as the 5kPa higher slightly than 3.63kPa, pressure transducer and automatic pressure controller APU decomposition pressure closed-loop control system; 5. after equal pressure is stablized, close Pneumatic valve by the outage of first solenoid valve, airtight leak locator drops to 3.63kPa with pressure control from 5kPa by automatic pressure controller APU again, the purpose of doing like this is gas heating when reducing pressurising time and pressurising, after equal pressure is stable, allow the pneumatic pinch anchor clamps unclamp by second solenoid valve outage, allow to eating dishes without rice or wine to atmosphere opening, the fuel oil supply system that airtight leak locator is docked at port carries out Ventiation Testing.The pressure of fuel oil supply system should drop in 30s to 2 minute below the 0.98kPa, with this as acceptability criteria.

Claims

1. a vehicle fuel feed system leaks and the ventilation pick-up unit, it is characterized in that: with air as the test source of the gas, pass through pipeline, successively with hand valve, filtrator, first pressure regulator valve, first tensimeter, second pressure regulator valve, second tensimeter, automatic pressure controller APU, pressure transducer, airtight leak locator and detection port communicate, Pneumatic valve also communicates with pipeline between first tensimeter and second pressure regulator valve through first solenoid valve by pipeline and airtight leak locator Pneumatic valve simultaneously in parallel, airtight leak locator communicates with pipeline between first tensimeter and second pressure regulator valve by pipeline, the pneumatic pinch anchor clamps by pipeline through second solenoid valve also with first tensimeter and second pressure regulator valve between pipeline communicate; Pressure transducer links to each other with automatic pressure controller APU respectively by lead with airtight leak locator.

2. vehicle fuel feed system according to claim 1 leaks and the ventilation pick-up unit, it is characterized in that: the air that with pressure is 700kPa is as the test source of the gas.