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Fuel pump noise-reduction apparatus in liquefied petroleum injection vehicle

A technology of liquefied petroleum and noise reduction device, applied in the field of operation devices, can solve the problems of output consumption, noise increase, etc.

Inactive Publication Date: 2005-09-07
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a disadvantage in that when the engine is stopped, the fuel pump continues to operate for a specified period of time by using another energy source, thereby causing increased noise and output consumption due to unnecessary operation of the fuel pump

Method used

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  • Fuel pump noise-reduction apparatus in liquefied petroleum injection vehicle

Examples

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Embodiment Construction

[0012] refer to figure 1 , a fuel pump muffler device according to an embodiment of the present invention includes an LPG switch 10, a cut-off valve 21 in a regulator 20, a cut-off valve 31 in a fuel tank 30, a fuel pump 32 in a fuel tank 30, and a fuel pump 32 for controlling the fuel interface box (IFB) electronic control unit (ECU) 40 .

[0013] The LPI engine has an engine management system (EMS) ECU and an IFB ECU to control the engine and fuel to activate the vehicle.

[0014] The LPG switch 10 is turned on or off according to the driver's operation. In case of an emergency or possible fuel leakage, the driver turns off the LPG switch 10 to stop fuel supply to avoid fuel leakage or any danger of the like.

[0015] When the battery power provided by the LPG switch 10 (B+, 12V power comes from the rear side of the main relay) is stopped by closing the LPG switch 10, the shut-off valve 21 of the regulator 20 and the shut-off valve 31 of the fuel tank 30 are closed to stop...

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PUM

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Abstract

A fuel pump noise-reduction apparatus in a Liquefied Petroleum Injection (LPI) vehicle comprises a Liquefied Petroleum Gas (LPG) switch. A plurality of shut off valves are configured for activation upon stoppage of battery power via the LPG switch. A fuel pump in a fuel tank is configured for activation upon stoppage of battery power via the LPG switch. The shut off valves close and the fuel pump stops simultaneously when the LPG switch is deactivated, contributing to a reduction in noise and engine output consumption due to unnecessary operation of the fuel pump when the engine stops.

Description

technical field [0001] The invention relates to a fuel pump muffler in a liquefied petroleum injection (LPI) vehicle. More particularly, the present invention relates to an apparatus for controlling the operation of a fuel shutoff valve and a fuel pump according to activation of a liquefied petroleum gas (LPG) switch. Background technique [0002] Generally, vehicles that use LPG as fuel are designed to inject the LPG into the engine in gaseous form. LPG is supplied from the fuel tank and converted to gas by evaporator and mixer. However, the LPG engine has some disadvantages in the output function of the engine, fuel economy, starting of the vehicle at low temperature, exhaust gas, and the like. Therefore, LPI engine vehicles have been developed and used at present. [0003] LPI engine vehicles are constructed to compressively deliver LPG fuel to injectors through a fuel line using a fuel pump installed in a fuel tank. The injectors then inject the fuel into the engine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02F02B43/00F02M37/08
CPCY02T10/32F02D19/025F02D41/3082F02D41/0027F02D19/022F02M21/0245F02D41/0025F02D41/221F02M21/0212F02D41/042Y02T10/30A47K10/06
Inventor 申昌悬
Owner HYUNDAI MOTOR CO LTD
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