Field of the Invention

The invention is in the field of the mechanical engineering and product design related to the equipment for CNG system installation for motor vehicles.

Related Background Art

The purpose of this invention is to develop the type of equipment used in the CNG system for motor vehicles which meets to the needs of the system. Generally, the pipes and filling receptacles of CNG motor vehicles are located in the engine room, then the fuel filler tank and CNG filling receptacle are separated so it is difficult for the driver to find the proper location for parking and refueling. Therefore, there is the idea to add the gas-filling receptacle to the existing fuel filler tank for facilitating CNG refueling.

Description and Object of the Invention

This invention aims to develop the form of CNG filling receptacle installation for motor vehicles within the same socket of fuel filler tank. In this case, the cover of fuel filler tank on motor vehicle will be opened and the driver can choose between fuel and gas. In addition, the components used to mount the bracket sets of gas filling receptacles are designed to be the compatible to the fuel filler tank and it will be easier for the driver in refueling.

Disclosure of the Invention

This is the invention of the jigs and fixtures for gas filling receptacles added to the fuel filler tank. The components are designed and made of metal sheets which are cut, drilled and folded to make the work pieces to be mounted for reinforcement. Moreover, the molded plastic components also are used in this case.

Processes of Parts Invention and Installation

Steps of Parts Invention

1. Cut the edge of the metal sheet as per the figure; drill the passing holes for screws; fold it and make the shape as per the figure ©; connect work pieces with nuts; set the nut holes in the same position as the passing holes and make it as the mounting frame for the gas filling receptacle;

2. Cut the edge of metal sheet; drill and fold it, then make it into the shape of the upper mounting board for gas filling receptacle as per the figure ©;

3. Cut the edge of metal sheet; drill and fold it; make it into the shape of the lower mounting board for gas filling receptacle as per the figure ®;

4. Put and connect the work pieces ©, ©, ® together;

5. Cut the edge of metal sheet; drill the passing holes for screws and make such work pieces into the shape of the board to be mounted to the frame as per the figure ©;

6. Make the screw case by cutting the metal pipe as per the figure ©;

7. Cut the edge of metal sheet; drill the passing holes for screws; connect it with nuts after setting the nut holes in the same position as the holes on the board locking the jigs and fixtures of gas filling receptacle to the frame as per the figure ©;

8. Cut the edge of metal sheet; drill the passing holes for screws; fold and make it into the shape as shown in the figure; connect it with nuts; set the nut hole in the same position as the passing hole for covering the fuel pipe as per the figure ©;

9. Make the plastic cover for gas filling receptacle ®;

Installation Procedures

1. Connect the gas filling receptacle to the jigs and fixtures (D, ©, ®; lock the filling receptacle with the board;

2. Screw the holding components of the gas filling receptacle ©, ©, © in the mounting board;

3. Put the work pieces ©, ©, ®, © on the frame; put the flanges of the screw passing holes across the sides of the frame; 4. Put the screw cases © in the position of the passing holes of the mounting board ©; thread the screws through the passing holes and tighten them for supporting all of four work pieces;

5. Put the locking board of gas filling receptacle set © with the frame; set the screw holes in the same position as the screws and tighten the screws for locking the gas filling receptacle set Θ, ®, ©, © to the frame ;

6. Reassemble the fuel filling receptacle in the old position on motor vehicle;

7. Install the cover of fuel filler tank ® in the mounting structure of gas filling receptacle Φ and tighten screws;

8. Lay the gas pipe from the system to the gas filling receptacle;

9. Install the plastic cover ® in the vehicle body; set the passing hole of fuel pipe in the same position as the hole of the fuel pipe and the passing hole of gas filling receptacle before tightening screw.

Best Mode for Carrying out the Invention

As described in the section "Disclosure of the Invention".