KR102006849B1 - Cover Assembly of fuel tank for vehicle - Google Patents

Abstract

A cover assembly of a fuel tank for a vehicle is disclosed. Cover assembly of a fuel tank for a vehicle according to an embodiment of the present invention is a plate provided in the fuel tank of the vehicle, the inlet port and the outlet port is installed on the plate, the control is installed on the plate and has an inner space and the upper opening A housing, a sensor housing having an upper opening at an outlet port provided adjacent to the control housing, a first substrate coupled to the interior space of the control housing and controlling the fuel tank, and provided in the interior space of the sensor housing And a cover coupled to close the opened upper portion of the control housing and the sensor housing, wherein the second substrate is provided with pressure sensors for sensing the internal pressure of the tank and the pressure of the fuel and transmitting a signal to the first substrate.

Description

Technical Field [0001] The present invention relates to a cover assembly for a fuel tank for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cover assembly for a fuel tank for a vehicle, and more particularly, to a cover assembly for a fuel tank for a vehicle which is simple to assemble and easy to manufacture.

Generally, a fuel system of a vehicle is one for supplying the mixer necessary for an engine under the most operating condition in a state in which it is most likely to be burned, and is one of the main factors that determine the performance of the engine, that is, the output and economy of the engine.

A very important component in such a fuel device is a fuel supply device that mixes fuel and air appropriately and supplies it to the engine. The fuel supply device includes a fuel tank for storing fuel and a fuel pump module for forcibly supplying the fuel, which is filled in the fuel tank, to the engine.

A fuel pump module is a device that sucks fuel from a fuel tank and pumps it to an engine. There are a mechanical system using a rotational force of an engine camshaft and an electric system using a DC motor or a piston (plunger). It is used. Because the electric fuel pump module is immersed in the fuel in the fuel tank, it has excellent functions for suppressing pump operation noise and vapor lock.

The conventional fuel pump module may include a plate assembly fixed to a fuel tank and a reserve body assembly connected to a lower side of the plate assembly by a guide rod.

The plate assembly includes a supply port for connecting the hose to the plate to deliver fuel to the engine, and a controller for electronically controlling the fuel pump.

The controller receives signals from an ECU (Electronic Control Unit), determines the fuel injection amount and the driving speed of the fuel pump according to the pressure, temperature, and operating conditions of the fuel line, and controls driving of the fuel pump by an output signal. Such a controller has a control housing installed on the upper surface of the plate and having a PCB substrate installed therein, and a cover closing the open top of the control housing. A number of electrical components such as capacitors and terminals are mounted on the PCB substrate.

In addition, the conventional plate assembly is provided with a pressure sensor for measuring the pressure of the fuel tank and a pressure sensor for measuring the pressure of the fuel in the supply port. These pressure sensors must be connected by connectors and cables so that the sensed signals can be transmitted to the controller. In the past, the assembly process was complicated because these connectors and cables were provided on the plate assembly.

Korean Patent Publication No. 10-2002-0002223 (2002.01.09.)

According to an embodiment of the present invention, there is provided a cover assembly for a fuel tank for a vehicle, which is simple to assemble and easy to manufacture.

According to an aspect of the invention, the plate provided in the fuel tank of the vehicle, the inlet port and the outlet port is installed on the plate, the control housing is installed on the plate and has an inner space and the upper opening, the control housing A sensor housing having an upper opening at an outlet port provided adjacent to the sensor housing, a first substrate coupled to the interior space of the control housing and controlling the fuel tank, and provided in the interior space of the sensor housing, the internal pressure and fuel of the fuel tank; A cover assembly of a vehicle fuel tank including a second substrate provided with pressure sensors for sensing a pressure of the first substrate and transmitting a signal to the first substrate, and a cover coupled to close the opened portion of the control housing and the sensor housing. Can be provided.

In addition, the cover includes a first cover coupled to the upper portion of the control housing and a second cover coupled to the upper portion of the sensor housing, the first cover and the second cover may be provided integrally.

In addition, the first substrate and the second substrate may be electrically connected by a connection terminal passing through the control housing and the sensor housing.

In addition, the pressure sensor for detecting the internal pressure of the fuel tank may further include a hose for measuring the atmospheric pressure.

In addition, the pressure sensor includes a first pressure sensor for detecting the internal pressure of the fuel tank, and a second pressure sensor for detecting the pressure of the fuel, the first pressure sensor is provided to protrude on the upper portion of the second substrate And a first sensor port, wherein the second pressure sensor may include a second sensor port protruding from a lower portion of the second substrate.

The cover assembly of a vehicle fuel tank according to an embodiment of the present invention, the first substrate for controlling the fuel tank inside the controller housing, the pressure sensor for detecting the internal pressure of the fuel tank and the pressure of the fuel inside the sensor housing By connecting the second substrate having a pressure sensor to be electrically connected using a connection terminal connecting the controller housing and the sensor housing, the manufacturing process can be simplified and the manufacturing cost can be effectively reduced by reducing the connection parts such as wiring and cables. have.

1 is a view showing a fuel tank in which a cover assembly of a fuel tank for a vehicle according to an embodiment of the present invention is provided.
2 is a perspective view illustrating a cover assembly of a vehicle fuel tank according to an embodiment of the present invention.
3 is a perspective view illustrating an exploded view of a cover assembly of a fuel tank for a vehicle according to an embodiment of the present invention.
4 is a bottom perspective view showing a cover assembly of a vehicle fuel tank according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the embodiments described below are provided as examples so that those skilled in the art will be able to fully understand the spirit of the present invention. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. Further, in order to clearly illustrate the present invention, parts not related to the description are omitted from the drawings, , Length, thickness, etc. may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 is a view showing a fuel tank installed with a cover assembly of a vehicle fuel tank according to an embodiment of the present invention, Figure 2 is a perspective view showing a cover assembly of a vehicle fuel tank, Figure 3 is a cover of the fuel tank for a vehicle 4 is an exploded view illustrating the assembly, and FIG. 4 is a view illustrating the bottom of the cover assembly of the vehicle fuel tank.

A fuel tank cover assembly 100 according to an embodiment of the present invention includes a plate 110 provided on a fuel tank 1 and an outlet port 122 and an inlet port 122 provided on the plate 110. [ A fuel port 120 including a port 124, and a controller module 130.

The plate 110 is mounted at an upper inlet side of the fuel tank 1 in which gaseous fuel is stored, and is provided in a substantially disk shape.

The outlet port 122 of the fuel port 120 is a flow path for discharging the fuel filled in the fuel tank to the engine which is an internal combustion engine, and the inlet port 124 is a flow path for returning fuel from the internal combustion engine.

More specifically, the outlet port 122 is for selectively supplying or blocking fuel from the fuel tank to the internal combustion engine by operation of a fuel pump and a drive motor (not shown), and includes a coil spring-type check- can do. During operation of the fuel pump, since the pressure of the fuel discharged from the pump is higher than the elastic force of the coil spring, the outlet port 122 is opened and no fuel pressure is generated during the stop of the fuel pump, Is closed.

The controller module 130 is provided adjacent to the outlet port 122 of the fuel port 120, particularly on the plate 110. The controller module 130 is installed so that the bottom of the fuel tank, that is, spaced apart from the upper surface of the plate 10 by a predetermined distance, to prevent the gas (vapor) generated from the fuel of the fuel tank to enter the internal electronic components of the controller. It is a structure usually installed.

As shown in FIG. 3, the controller module 130 has a rectangular inner space and a control housing 131 having an upper opening, a PCB substrate 150 coupled to an inner space of the control housing 131, and a control. The cover 160 may be coupled to close the opened upper portion of the housing 131.

The control housing 131 may be formed in one part with the plate 110 by an injection method in the form of a box in which the upper portion is opened. As a result, a minute gap is not formed around the bottom of the control housing 131 facing the top of the fuel tank, thereby effectively preventing the evaporated gas generated from the fuel from flowing into the control housing 131.

In addition, the control housing 131 may include a substrate mounting unit 132 on which a PCB substrate 150 on which electronic elements for controlling a fuel tank are mounted, and a power connector unit provided on one side of the substrate mounting unit 132. 138).

The substrate mounting portion 132 is provided with first and second connection terminals 135 and 136 and a boss 137 of a predetermined height protruding from the bottom.

The first connection terminal 135 is a terminal for transmitting a signal to the fuel pump driving apparatus (not shown), and the second connection terminal 136 is a terminal for controlling the motor (not shown) of the fuel pump. Of course, the position and role of the first and second connection terminals 135 and 136 may vary according to design specifications. The upper ends of the first and second connection terminals 135 and 136 may be electrically connected to the PCB substrate 150, and the lower ends may be electrically connected to the fuel tank side terminal terminals through the plate 110. The first connector 115 and the second connector 116 protrude from the rear surface of the plate 110 to electrically connect the lower ends of the first and second connection terminals, as shown in FIG. 4. At least one boss 137 is provided to maintain a constant height of the PCB substrate 150 installed at the top.

The power connector 138 electrically connects a fuel pump driving device (not shown) and a motor of the fuel pump (not shown) so that power can be applied from the outside.

Meanwhile, the outlet port 122 adjacent to the control housing 131 includes a sensor housing 140. The sensor housing 140 includes an outlet of the outlet port 122 and a rear surface of the plate 110, that is, a flow path connecting the fuel tank 1 to the inside, and may be integrally provided during the molding process of the plate 110. have.

The sensor housing 140 may include a PCB substrate 143 provided with two pressure sensors 141 and 142 in an inner flow path space. One of the pressure sensors is a first pressure sensor 141 for detecting the pressure inside the fuel tank, that is, pneumatic pressure, and the other is a second pressure sensor 142 for detecting the pressure of the fuel, that is, the hydraulic pressure of the fuel moving through the port. to be. The first pressure sensor 141 and the second pressure sensor 142 may be provided to be mounted on the PCB substrate 143.

The first pressure sensor 141 measures the air pressure inside the fuel tank using the relative pressure. To this end, the first pressure sensor 141 is connected to the external hose 145 using the first sensor port 144 protruding from the upper portion of the PCB substrate 143. That is, the first pressure sensor 141 detects the atmospheric pressure through the external hose 145, and calculates the pneumatic pressure inside the fuel tank in the ECU (not shown) based on the detected atmospheric pressure. This is because the first pressure sensor measures the pressure state inside the fuel tank at a low pressure so that the first pressure sensor can sufficiently reflect the altitude difference (high altitude low pressure).

The second pressure sensor 142 is connected to the inner hose (not shown) by using the second sensor port 146 protruding from the lower portion of the PCB substrate 143. The second sensor port 146 communicates with the second pressure sensor 142 through an internal flow path (not shown) of the outlet port 122 and measures the oil pressure of the fuel using an absolute pressure method. Reference numeral 147, which is not described in FIG. 3, is a packing ring, and reference numeral 148, which is not described in FIG. 4, is a sensor hole for communicating the inside of the fuel tank with the first pressure sensor 141 for measuring the pneumatic pressure of the fuel tank. . In the present embodiment, the sensor housing 140 is illustrated as a circle, but is not limited thereto.

On the other hand, the first connection to the PCB substrate 150 (hereinafter referred to as the first substrate) provided inside the control housing 131 electrically connected to various elements for controlling the fuel pump and to an external power source. A PCB substrate 143 (hereinafter referred to as a second substrate) provided in the terminal pins 152 and the sensor housing 140 and including a first pressure sensor 141 and a second pressure sensor 142. The second connection terminal 154 to be electrically connected may be provided. The second connection terminal 154 may be provided through a sidewall between the control housing 131 and the sensor housing 140 as a metal conductor, and may be connected to the PCB substrates 143 and 150 through soldering.

Therefore, the cover assembly 100 of the fuel tank according to the present embodiment has a first pressure sensor 142 for detecting the internal pressure of the fuel tank 1 and a second pressure sensor 144 for detecting the pressure of the fuel. Since the second substrate 143 including the first substrate 150 and the connection terminal 154 provided inside the control housing 131 is directly and easily connected, not only the manufacturing process is simplified but also the wiring or the cable. The cost savings can be achieved by reducing the number of connecting parts.

On the other hand, the cover 160 is installed to close the upper opening of the control housing 131. The cover 160 may include a metallic material to serve as a grounding function for shielding electromagnetic waves generated during operation of the fuel pump or static electricity flowing from the outside.

In addition, the cover 160 may include a first cover 162 for closing the upper opening of the control housing 131 and a second cover 164 for closing the upper opening of the sensor housing 140. The first cover 162 and the second cover 164 may be integrally provided. The cover 160 and the control housing 131 may be fastened through bolts or the like.

The cover assembly of the fuel tank for a vehicle provided as described above, when the ignition key provided in the vehicle is turned on through the power connector 138, the fuel pump driving device is connected to the fuel pump according to a signal transmitted from the electronic control unit of the vehicle. The motor is driven, and the controller provided on the first substrate 150 controls the devices mounted on the basis of the signal received from the second substrate 143 to effectively control the amount of fuel supplied to the engine.

100 .. Fuel tank cover assembly 110 .. plate
122..Outlet Port 124..Inlet Port
130 .. Controller module 131 .. Control housing
132. Substrate portions 135, 136. First and second connection terminals
137..Boss 138..Power connector
140 .. sensor housing 141 .. first pressure sensor
142. 2nd pressure sensor 143. PCB board (2nd board)
150.PCB board (1st board) 154..Connection terminal
160..cover 162.first cover
164. Second cover

Claims (5)

A plate provided in a fuel tank of the vehicle,
An inlet port and an outlet port installed on the plate;
A control housing installed on the plate and having an inner space and an upper portion thereof opened;
A sensor housing having an upper portion opened at an outlet port provided adjacent to the control housing;
A first substrate coupled to an inner space of the control housing and controlling a fuel tank;
A second substrate provided in an inner space of the sensor housing and provided with pressure sensors for transmitting a signal to the first substrate by detecting an internal pressure of the fuel tank and a pressure of the fuel;
A cover coupled to close the opened top of the control housing and the sensor housing,
The cover includes a first cover coupled to an upper portion of the control housing and a second cover coupled to an upper portion of the sensor housing, and the first cover and the second cover are integrally provided.
The pressure sensor includes a first pressure sensor for detecting the internal pressure of the fuel tank, and a second pressure sensor for detecting the pressure of the fuel,
The first pressure sensor may include a first sensor port protruding from an upper portion of the second substrate, and the second pressure sensor may include a cover of a fuel tank for a vehicle including a second sensor port protruding from a lower portion of the second substrate. assembly. delete The method of claim 1,
The first substrate and the second substrate is a cover assembly of a fuel tank for a vehicle is electrically connected by a connecting terminal through the control housing and the sensor housing. The method of claim 1,
Pressure sensor for detecting the internal pressure of the fuel tank cover assembly of a vehicle fuel tank further comprises a hose for measuring the atmospheric pressure. delete

Images