KR101987457B1 - Fuel supply control apparatus for LPI vehicle - Google Patents

Abstract

The present invention relates to an apparatus installed in a liquefied petroleum injection (LPI) vehicle to control fuel supply, which comprises: a doughnut type bomb (10) including a groove (11) and a bracket formed on the outer circumferential surface; a pump unit (20) mounted in the groove (11) of the doughnut type bomb (10) and including a turbine pump (22); a controller (30) accommodating a PCB (40) between the housing (31) and a heat radiating cover (35) to apply power and a signal to the pump unit (20); and a wiring member (50) electrically connecting the pump unit (20) with the controller (30). Accordingly, the turbine pump consuming a current by twice or more than that of a positive displacement pump and the controller are interlocked with the doughnut type bomb of the LPI vehicle, and an optimal design margin is secured, thereby providing an effect of reducing costs while maintaining functionality.

Description

Technical Field [0001] The present invention relates to a fuel supply control apparatus for an LPI vehicle,

The present invention relates to fuel supply control of an LPI vehicle, and more particularly to a fuel supply control device of an LPI vehicle that is mounted on a bomb in a fuel system of an LPI vehicle to guide fuel transfer.

In the case of LPI (Liquefied Petroleum Injection) vehicles, the fuel stored in the bomb is transferred to the engine based on the fuel pump and the controller, and the unused fuel of the engine is returned to the bomb via the regulator valve. Efforts are continuing to achieve cost reductions while maintaining quality in mass production. For example, we are interested in improving fuel pumps and controllers on bombs.

As a prior art document related to this, Korean Patent Registration No. 1714296 can be referred to. This structure is based on an LPG pump and a multi-valve integrated structure in which a housing accommodating main functional parts such as PCB is coupled to a plate of a fuel pump exposed through an opening of a bomb.

Accordingly, it is possible to miniaturize the related structure and reduce the cost, improve the EMI generation by reducing the length of the three-phase wire, to easily attach the extension wire to the controller and to assemble the connector into the vehicle connector, So that there is no problem of inflow of water and the like.

However, this is a positive displacement pump, the amount of current used is small, but the noise is structurally generated, and it is difficult to apply it to a turbine pump having a relatively low noise structure.

Another prior art document, Korean Patent Registration No. 1283122, is made up of an impeller, a jet pump, a retainer, an insulating rubber, an external filter, and the like. The LPi system reduces durability and flow rate, cavitation, It is possible to apply it to the LPi system, and it is expected that the cost and the weight can be remarkably reduced.

However, since the structure for modularizing the turbine-type fuel pump is essential, there is room for improvement in connection with the donut-shaped bomb to improve the efficiency.

Korean Patent Registration No. 1714296 entitled "Fuel Pump Controller of Elfie Vehicle" (Published on Feb. 23, 2017). Korean Patent Publication No. 1283122 entitled "Turbine Fuel Pump Module of Gas Fuel Vehicle" (Published on Jun. 22, 2009)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the related art by providing a structure in which a toroidal bomb is applied to an LPI vehicle, and a design margin optimal for coupling a controller to a turbine pump, And to provide a fuel supply control device for an LPI vehicle.

In order to achieve the above object, the present invention provides an apparatus for controlling fuel supply mounted on an LPI vehicle, comprising: a toroidal bomb having a groove and a bracket on an outer circumferential surface thereof; A pump unit mounted to the groove of the toroidal bomb and having a turbine pump; A controller for receiving the PCB between the housing and the heat radiating cover to apply power and signals to the pump unit; And a connection member electrically connecting the pump unit and the controller.

As a detailed configuration of the present invention, the toroidal bomb bracket supports the fuel line and the wiring member by using a main bracket having an induction groove, and supports the controller using a U-shaped sub bracket.

In the detailed configuration of the present invention, the PCB of the controller is provided with a chamfer portion for recognizing an assembly position at one corner, and is connected to the internal connector through the lead wire of the bent metal.

In the detailed construction of the present invention, the heat radiating cover of the controller is grounded to the PCB through a fastening plate portion raised at a predetermined height from a corner, and is radiated through a heat radiating plate portion raised at a predetermined height from the center.

In a detailed configuration of the present invention, the controller is characterized by having a sub bracket of a donut-shaped cylinder and a grounding line coupled to the sub bracket in a posture outward of the heat radiating cover and connected to the vehicle body.

In the detailed construction of the present invention, the controller is characterized in that the contact is maintained between the back surface of the PCB on which the FET is mounted and the heat sink through the heat radiation pad having the elastic resin material.

As described above, according to the present invention, in addition to the turbine pump, which consumes more than twice the electric current of the volumetric pump in the donut-shaped bomb of the LPI vehicle, the effect of reducing the cost while maintaining the functionality by securing the optimum design margin while linking the controller have.

Brief Description of the Drawings Fig.
Figure 2 is a schematic diagram illustrating the detailed circuit connections to the device of Figure 1;
Fig. 3 is a perspective view of the main part of the apparatus according to the present invention,
4 is a cross-sectional view showing the inside of the controller of the device according to the present invention
5 is a schematic view showing a controller board of an apparatus according to the present invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention proposes a device mounted on a LPI (Liquefied Petroleum Injection) vehicle to control fuel supply.

According to the present invention, a toroidal cylinder 10 having a groove 11 and a bracket on the outer circumferential surface is applied. The toroidal bulb 10 is installed at the spare tire position in the trunk of the LPI vehicle, which is advantageous in expanding the trunk space as compared with a conventional cylindrical bomb. 1 and 2 illustrate a state in which a groove 11 and a plurality of brackets are formed on an outer circumferential surface adjacent to the outer diameter of the toroidal bomb 10. The groove (11) has a rectangular or curved side extending to the periphery of the flat bottom surface.

The toroidal cylinder 10 supports the fuel line 26 and the connecting member 50 by using the main bracket 13 having the guide groove 16 and the U- 14) for supporting the controller (30). The main bracket 13 is formed at three or more places as a part for fixing the toroidal bomb 10 to the vehicle body (trunk). The upper surface of the main bracket 13 has an induction groove 16 for stably supporting the fuel line 26 and the connection member 50. The sub brackets 14 are fixed so as to face each other at a position adjacent to the main bracket 13 on one side. The upper surface (outer surface) of the sub bracket 14 has a fastening hole for supporting the controller 30.

According to the present invention, the pump unit 20 having the turbine pump 22 is mounted on the groove 11 of the toroidal bomb 10. The pump unit 20 integrally includes a turbine pump 22, a multi-valve 24, and the like in the housing. The turbine pump 22 is advantageous in reducing the flow rate and preventing noise compared to the positive displacement pump, but requires circuit improvement and heat radiation supplementation by increasing current consumption.

According to the present invention, the PCB (40) is accommodated between the housing (31) and the heat dissipation cover (35) so that the controller (30) applies power and signals to the pump unit (20). The controller 30 is mounted on the sub bracket 14 and is circuitly connected to the pump unit 20 through the connection member 50. [ 3 and 4, the PCB 40 of the controller 30 is accommodated in the space by the housing 31 and the heat radiating cover 35. [

The PCB 40 of the controller 30 is provided with a chamfered portion 41 for recognition of an assembled position at one corner and is connected to the internal connector 42 ). 3 and 5, a chamfer portion 41 formed at one corner of the PCB 40 and a chamfer formed at the heat radiating cover 35 corresponding thereto are illustrated. The operator can mount the PCB 40 while confirming the chamfered portion 41, thereby preventing the poor assembly. The internal connector 42 coupled to the PCB 40 is connected to the lead wire 43 made of a metal to ensure rigidity and durability. The internal connector 42 of the PCB 40 is installed in a structure in which it engages with the internal connector 52 of the wiring member 50. [

At this time, the PCB 40 is configured to generate a three-phase power source including the FET 46, the capacitor 47, the MCU 48, and the like. The FET 46 causing the heat generation is disposed at a position spaced apart from the capacitor 47. The MCU (48) can be cost-reduced by applying integrated semiconductor with 5V regulator and motor controller.

The heat dissipation cover 35 of the controller 30 is grounded from the PCB 40 through the fastening plate portion 36 protruded at a predetermined height from the corner, (37). Referring to Fig. 3, there are exemplified four fixing plate portions 36 at the corners and one heat sink portion 37 at the center in the heat radiating cover 35. Fig. The fixing and grounding of the PCB 40 is performed through the raised clamping plate portion 36 and the contact and the heat radiation of the PCB 40 are performed through the raised heat sink portion 37. The heat sink portion 37 is configured to form a plurality of heat radiating fins and is opposed to the arrangement region of the FET 46. [ When the PCB 40 is mounted on the heat dissipation cover 35 having such a structure, it is advantageous to improve durability due to heat radiation as well as resistance to EMI.

At this time, if a via hole (not shown) is formed in the periphery of the FET 46 and the MCU 48 on the PCB 40, heat dissipation and EMI performance are expected to be improved.

According to the present invention, since the controller 30 is hidden in the lower space of the trunk together with the toroidal cylinder 10 by a separate cover (not shown), the cost can be reduced by the non-radiating structure for eliminating the molding liquid.

The controller 30 is connected to the sub bracket 14 of the toroidal bomb 10 in a posture in which the heat radiating cover 35 is outwardly and is connected to the vehicle body on the sub bracket 14 And a ground line (44). When the controller 30 is installed at the center of the donut-shaped cylinder 10, durability is degraded due to weak heat dissipation. The posture in which the heat radiating cover 35 is turned outward from the toroidal bulb 10 is advantageous for enhancing the heat radiation of the controller 30 to which the turbine pump 22 is applied. The ground wire 44 connected to the sub bracket 14 as shown in FIG. 2 prevents noise introduced onto the PCB 40 of the controller 30.

As a detailed configuration of the present invention, the controller 30 maintains contact between the back surface of the PCB 40 on which the FET 46 is mounted and the heat sink portion 37 via the heat radiation pad 33 having the flexible resin material . The heat dissipation pad 33 exhibits heat dissipation and EMI shielding based on the elasticity of the mixture of the resin material and the fiber material. As an example of the heat dissipation pad 33, a structure in which a metal plate having a high thermal conductivity and a resin sheet are laminated can be applied. According to the elasticity of the heat radiating pad 33, vibration transmitted to the PCB 40 through the heat radiating cover 35 can be mitigated.

According to the present invention, the wiring member (50) electrically connects the pump unit (20) and the controller (30). The wiring member 50 is constituted by a cable for circuit connection between the pump unit 20, the controller 30, and the controller (not shown) of the vehicle. The connection member 50 is tightly supported by using the main bracket 13 of the donut-shaped bomb 10. The internal connector 52 of the wiring member 50 is coupled to the PCB 40 and the pump connector 54 is coupled to the pump unit 20. In addition, the wiring member 50 may include an external connector 56 connected to the controller of the vehicle.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: Donut bomb 11: Groove
13: Main Bracket 14: Sub Bracket
20: Pump unit 22: Turbine pump
24: multi-valve 26: fuel line
30: controller 31: housing
33: heat radiating pad 35: heat radiating cover
36: fastening plate portion 37: heat sink plate portion
40: PCB 41: Chamfer portion 42: Internal connector
43: lead wire 44: ground wire
46: FET 48: MCU
50: wiring member 52: internal connector
54: Pump connector 56: External connector

Claims (6)

CLAIMS 1. An apparatus for controlling fuel supply mounted on an LPI vehicle, comprising:
A toroidal bomb (10) having a groove (11) and a bracket on an outer circumferential surface;
A pump unit 20 mounted to the groove 11 of the toroidal bomb 10 and having a turbine pump 22 and a multi-valve 24;
A controller (30) for receiving the PCB (40) between the housing (31) and the heat dissipation cover (35) to apply power and a signal to the pump unit (20); And
And a connection member (50) for electrically connecting the pump unit (20) and the controller (30)
The toroidal bomb 10 supports the fuel line 26 and the connection member 50 by using the main bracket 13 having the guide groove 16 and is connected to the controller 30,
The PCB 40 of the controller 30 has a chamfer portion 41 for recognition of an assembly position at one corner and is connected to the internal connector 42 via a bent metal lead 43,
The heat radiating cover 35 of the controller 30 is connected to the PCB 40 via the fastening plate 36 raised at a predetermined height from the corner and is connected to the PCB 40 through the heat radiating plate 37, 40 and radiates heat,
Wherein the controller (30) is coupled to the sub bracket (14) of the toroidal bomb (10) with the heat radiating cover (35) outward. delete delete delete The method according to claim 1,
Wherein the controller (30) has a ground line (44) connected to the vehicle body on the sub bracket (14). The method according to claim 1,
Wherein the controller (30) maintains contact between the back surface of the PCB (40) on which the FET (46) is mounted and the heat sink part (37) through a heat radiation pad (33) having a flexible resin material. Fuel ratio.

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