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Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles

An air-tightness detection, dual-fuel vehicle technology, which is applied in the direction of using liquid/vacuum for liquid-tightness measurement, and by measuring the acceleration and deceleration rate of fluids, etc. problem, to achieve the effect of high degree of intelligence, simple detection operation, and high replacement efficiency

Inactive Publication Date: 2017-05-31
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-precision air-tightness detection, detection and nitrogen replacement equipment in order to overcome the problems of low integration, low detection accuracy and complex operation in the prior art. High-efficiency airtightness detection and nitrogen replacement system and control method for dual-fuel vehicles

Method used

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  • Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles
  • Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles
  • Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles

Examples

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Effect test

Embodiment 1

[0061] Such as figure 1 , figure 2 The shown embodiment is an air tightness detection and nitrogen replacement system for a dual-fuel vehicle. The system is connected to the air 1, the nitrogen tank 2 and the vehicle inflation valve 3 respectively; the system includes a high-pressure gas storage device 4 and a pressure-reducing device 5 , pressure reference device 6, inflation device 7, vacuum device 8, first display 9 and controller 10; the gas outlet of the high-pressure gas storage device is connected with the decompression device, and the decompression device is connected with the pressure reference device and the inflation device respectively connection; the controller is electrically connected to the high-pressure gas storage device, the decompression device, the pressure reference device, the inflation device, the vacuum device and the first display;

[0062] Such as image 3 , Figure 5 As shown, the high-pressure gas storage device includes a first solenoid valve ...

Embodiment 2

[0087] Such as Figure 4 , Figure 6 As shown, the vacuum pumping device in Embodiment 2 includes a vacuum pump 29 and a vacuum pressure sensor 30 located on the vacuum pump; both the vacuum pump and the vacuum pressure sensor are electrically connected to the controller; step 200 in Embodiment 1 is replaced by the following steps:

[0088] Step 10, the operator connects the first connector with the automobile inflation valve, the controller controls the third solenoid valve to connect with the high-pressure air tank, the fourth solenoid valve connects the pressure reducing valve and the reference tank, and the fifth solenoid valve connects the pressure reducing valve and the automobile Inflatable valve, the air enters the benchmark tank and the air storage tank of the tested car respectively;

[0089] Step 20, when the pressure values ​​detected by the third, fourth and fifth pressure gauges are all greater than L, the controller controls the connection between the third sol...

Embodiment 3

[0096] In embodiment 3, such as Figure 4 , Figure 6 As shown, a differential pressure sensor 31 is provided between the fourth pressure gauge and the fifth pressure gauge, the output end of the differential pressure sensor is electrically connected to the amplifier 32, and the output end of the amplifier is electrically connected to the controller and the second display 33 respectively; The above step 230 is replaced by the following steps:

[0097] If A<the lower limit of the standard range of the first pressure difference, the controller controls the decompression device to communicate with the high-pressure air tank, and the fourth and fifth solenoid valves communicate with the decompression device respectively;

[0098] When the pressure values ​​detected by the fourth and fifth pressure gauges are both greater than H, the controller controls the connection between the decompression device and the high-pressure air tank, and the connection between the fourth and fifth s...

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Abstract

The invention discloses a gas tightness detection and nitrogen gas replacement system of a dual-fuel automobile and a controlling method thereof. The gas tightness detection and nitrogen gas replacement system is characterized in that a high-pressure gas storage device is used for storing high-pressure air and high-pressure nitrogen gas before gas tightness detection and nitrogen gas replacement, after the high-pressure air and the high-pressure nitrogen gas are stored, gas tightness detection and nitrogen gas replacement can be continuously performed by the stored gas in a certain time; when pressure values detected by a first pressure gauge and pressure values detected by a second pressure gauge are lower than corresponding lower limiting values in a standard pressure range; a high-pressure air tank is firstly aerated, and then a high-pressure nitrogen gas tank is aerated after aeration completion of the air tank. According to the system and the method, the gas tightness detection precision, the intelligent level, and the gas tightness detection and nitrogen gas replacement efficiency are high.

Description

technical field [0001] The invention relates to the technical field of dual-fuel vehicles, in particular to an air-tightness detection and nitrogen replacement system and a control method for a dual-fuel vehicle with high air-tightness detection accuracy and high detection and nitrogen replacement efficiency. Background technique [0002] With the rise of oil prices and the enhancement of environmental protection awareness, dual-fuel vehicles are becoming more and more popular among consumers, especially CNG dual-fuel vehicles with affordable prices and mature technologies have become the first choice for families and rental operators. With the increase in demand for CNG vehicles, the original air tightness testing and nitrogen replacement technology, equipment and testing efficiency of CNG vehicles have been unable to meet the needs of mass production of dual-fuel vehicles, and cannot provide consumers with safer and more reliable products. CNG vehicles. [0003] The curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/32
Inventor 李书涛顾伟明
Owner ZHEJIANG GEELY HOLDING (GROUP) CO LTD
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