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Fuel supply device

A fuel supply device and fuel supply technology, applied in the direction of oil supply device, liquid fuel feeder, gaseous engine fuel, etc., can solve the problem of cut-off valve damage and so on

Inactive Publication Date: 2016-08-17
AISAN IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, although the energization period to the shutoff valve based on each opening command is not long, the open command to the shutoff valve is repeatedly output, and a large current is repeatedly supplied to the shutoff valve.
As a result, even if the period during which the shutoff valve is driven by supplying a large current is limited as described above, the temperature of the shutoff valve may rise and the shutoff valve may be damaged.

Method used

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Examples

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Embodiment Construction

[0026] Below, refer to Figure 1-Figure 5 (d) An embodiment in which the fuel supply device is embodied as a fuel supply device that supplies fuel to a dual-fuel internal combustion engine mounted on a vehicle will be described.

[0027] Such as figure 1 As shown, the fuel supply device includes: a CNG (compressed natural gas) supply system 40 and a gasoline supply system 30 . The internal combustion engine 10 is a dual-fuel internal combustion engine capable of switching between CNG and gasoline.

[0028] An injector 12 for CNG and an injector 13 for gasoline are attached to an intake passage 11 of the internal combustion engine 10 . In the intake passage 11, the fuel injected from the CNG injector 12 or the gasoline injector 13 is mixed with intake air to generate an air-fuel mixture. The air-fuel mixture is sucked into the combustion chamber 15 and combusted. The combusted air-fuel mixture becomes exhaust and is discharged from the combustion chamber 15 through the exha...

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PUM

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Abstract

This fuel supply device is equipped with a fuel tank, a fuel supply passage for supplying a fuel stored in the fuel tank, an electric shutoff valve that is disposed on the fuel supply passage and opens when electricity is applied thereto, and a control unit that controls the application of electricity to the shutoff valve. The control unit opens the shutoff valve by applying an opening drive current to the shutoff valve, said opening drive current being larger than a holding current for holding the valve in the open state. The control unit executes processing for prohibiting the application of electricity to the shutoff valve (step 110) on the basis of the history of the application of opening drive current to the shutoff valve within a retroactive period (step 100).

Description

technical field [0001] The present invention relates to a fuel supply device provided with an electric shutoff valve. Background technique [0002] Patent Document 1 discloses a fuel supply device in which an electric shutoff valve is provided in a fuel supply passage. The fuel supply device of Patent Document 1 is configured to supply a large current to the shutoff valve to increase the driving force of the shutoff valve in order to open the shutoff valve stuck by fuel. However, if a large current is continuously supplied to the shutoff valve, the temperature of the shutoff valve rises, and the shutoff valve is damaged. [0003] To solve the above problems, the ECU of the fuel supply system calculates and stores the time from when the shutoff valve is closed to when the internal combustion engine is stopped when the internal combustion engine is stopped. And, the ECU detects the temperature of the cooling water of the internal combustion engine and the pressure of the fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02F02B43/00F02D19/02F02D19/06F02M37/00
CPCF02D19/0663F02D19/0647Y02T10/30F02D19/0681
Inventor 杉下雅一笠岛健司
Owner AISAN IND CO LTD