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gas fuel supply

A technology of gas fuel and supply device, which is applied in the directions of liquid fuel feeder, fuel supply device, fuel injection control, etc., can solve the problems of prolonging and decreasing the stop period to the above-mentioned and other issues

Inactive Publication Date: 2018-05-22
AISAN IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the situation where the fuel pressure temporarily drops during fuel filling to cause a false alarm is not limited to the above-mentioned phenomenon.
Even when fuel is filled with the solenoid valve open, the pressure in the fuel supply passage does not drop to the level that becomes the target of the notification, but the pressure in the fuel supply passage sometimes drops to the above level
In addition, when it is determined that the fuel is filled because the pressure in the fuel supply passage exceeds a predetermined value, a false alarm may be generated or the stop period of the alarm may be unnecessarily prolonged depending on the setting method of the cracking pressure.

Method used

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no. 1 Embodiment approach

[0038] Refer to the following Figure 1-Figure 9 (e) The 1st Embodiment which actualized the gaseous fuel supply apparatus of this invention is demonstrated. figure 1 The illustrated internal combustion engine 10 is a dual fuel internal combustion engine utilizing CNG (compressed natural gas) as a gaseous fuel and gasoline as a liquid fuel, which is an alternative to CNG. In the first embodiment, the internal combustion engine 10 is a multi-cylinder internal combustion engine, but figure 1 Only 1 cylinder is shown.

[0039] Such as figure 1 As shown, an injector 14 for CNG and an injector 16 for gasoline are mounted on the intake passage 12 of the internal combustion engine 10 . Fuel is injected into the intake passage 12 from the injector 14 for CNG or the injector 16 for gasoline. The injected fuel is mixed with the intake air to form an air-fuel mixture. The air-fuel mixture is sucked into the combustion chamber 20 with the opening of the intake valve 18 . In the comb...

no. 2 Embodiment approach

[0089] Hereinafter, reference will be made centering on differences from the first embodiment. Figure 10 The second embodiment will be described.

[0090] In the first embodiment, the phenomenon occurring immediately after the nozzle for CNG filling is inserted into the filling port 68 is detected based on the rising speed of the high-pressure side detection value PH. On the other hand, in the second embodiment, the above-mentioned phenomenon is detected based on the amount of increase in the high-side detection value PH relative to the reference value PH0.

[0091] Figure 10 The procedure of the masking process of the second embodiment is shown. This processing is performed by the CPU72 in accordance with figure 1 The mask program 74a in the shown nonvolatile memory 74 repeats at a predetermined cycle. exist Figure 10 in, right with Figure 8 Processes corresponding to the processes shown are denoted with the same step numbers.

[0092] In this process, when the det...

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Abstract

To exert combustion control using a CNG injector, a first cutoff valve is opened. On condition that the first cutoff valve is opened, the presence or absence of fuel leakage in a high-pressure side path is determined based on a drop in a detected value of a pressure in the high-pressure side path (high-pressure side detected value PH). Inserting a nozzle for CNG filling into a filling opening causes a phenomenon where the high-pressure side detected value PH rises once and then drops. If the high-pressure side detected value PH rises at a specified rate or more, a CPU stops determination as to the presence or absence of a fuel leakage malfunction for a specified period of time.

Description

technical field [0001] The present invention relates to a gaseous fuel supply device that detects an abnormality based on a drop in pressure in a fuel supply passage between a storage portion that stores gaseous fuel and an injector. Background technique [0002] In the gaseous fuel supply device disclosed in Patent Document 1, a filling path for filling fuel into a fuel tank storing gaseous fuel communicates with a fuel supply passage for supplying fuel from the fuel tank to the injector. In this device, the fuel filling port can communicate with the fuel tank through the solenoid valve, and can communicate with the fuel tank through the first check valve. The solenoid valve and the first check valve join together on the upstream side near the fuel filling port. In addition, the electromagnetic valve and the first check valve are connected to the fuel filling port through the second check valve located on their upstream side. Patent Document 1 describes that the cracking ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M21/02F02D19/06F02D41/02
CPCF02D19/0623F02D19/0647F02D41/0027F02D41/22F02D2041/225F02D2200/0602F02M21/0215F02M21/0278Y02T10/30F02D41/26F02D41/3005F02D2041/224F02M37/0047
Inventor 有家崇裕大西明渡
Owner AISAN IND CO LTD