Automotive Dual Fuel Rail Multi-way Valve

Abstract

The invention discloses an automobile double fuel guide rail multiport valve, and belongs to the field of automobile double fuel guide rail switching devices. The automobile double fuel guide rail multiport valve comprises a shell body and a valve core piston, the shell body is internally provided with a through hole, the through hole is internally provided with a movable valve core piston, the two ends of the through hole are sealed, the two ends of the shell body are provided with multiple guide rail installing holes which are communicated with two ends of the through hole, the guide rail installing holes which are formed at the same end are communicated with one another, the shell body is further provided with an ejector installing hole which is communicated with the middle portion of the through hole, an electromagnetic valve is installed inside the shell body, and the electromagnetic valve controls the valve core piston; and when the electromagnetic valve is not powered on, the valve core piston is at a normal position, and when the electromagnetic valve is powered on, the valve core piston moves to a switching position. By means of the automobile double fuel guide rail multiport valve, reliable switching between two or more fuel guide rails can be achieved, two sets of guide rails share one ejector, the sealing performance is good, the valve core piston rapidly runs and does not drift, fuel mixing is very few during switching, an automobile starting difficulty cannot be caused, shaking or flameout cannot be caused during switching, and the application is wide.

Description

technical field [0001] The invention relates to a fuel switching device for an automobile dual-fuel rail, in particular to a multi-way valve for an automobile dual-fuel rail. Background technique [0002] With the focus on vehicle economy and alternative fuel economy and environmental protection, automakers and refitting markets turn to more economical and environmentally friendly vehicles in order to improve efficiency and energy conservation and environmental protection, so the effective use of alternative fuels or dual-purpose fuels or multiple fuels Use requires a unique configuration of conventional fuel engine related components, where a good switching device is required for changing two or more fuel supplies. The general single-rail single-injection system in the prior art is to connect a set of methanol pipelines in parallel through solenoid valves before the injection rail and injector of the original automobile. Methanol cold starts are difficult and one fuel flow...

AI Technical Summary

Problems solved by technology

The general single-rail single-injection system in the prior art is to connect a set of methanol pipelines in parallel through solenoid valves before the injection rail and injector of the original automobile. Methanol cold start is difficult and one of the fuels flows into the other, causing more than two fuels to mix in the tank

Patent 201320765146.6 dual-fuel injection device, although it solves the problem of complete conversion between gasoline and methanol, has the following defects: First, the filtration accuracy of the filter screen, or the clogging of the filter screen after long-term use will affect the oil passing of the fuel The amount directly affects the fuel injection and supply of the injector; the second is that during the long-term operation of the engine fuel, the gap between the piston and the cylinder wall of the piston is too small, and the tiny impurities in the fuel will cause the flexibility of the piston, thus affecting the airtightness of the fuel. The third is that when the piston moves to one side, the fuel pressure on one side will remain for a period of time, causing the piston to fail to seal and causing the fuel to flow and mix to the other side, and the two fuels will mix with each other into the container or fuel tank , if too much methanol is mixed in the gasoline tank, it will cause the start of the vehicle and the corrosion of the engine and the pipeline. When the combustion temperature is high, methanol with poor fuel or incomplete will penetrate into the thin lubricating oil in the cylinder through the gap between the piston ring and the cylinder wall, causing premature wear of the engine and causing engine damage

Fourth, the amount of mixing of the two fuels in the valve is relatively large, and when the fuel is switched to each other, it will cause the engine to shake

Five is to install pipes or guide rails on the upper part of the three-way valve, which increases the height of the guide rails. The engine space of compact vehicles is relatively small, which will affect the installation and use, and the number of installed models will decrease; Time, resulting in long switching time or difficult switching, vehicle vibration, or even flameout causing driving safety

Chinese patent application 2015201169426 dual-fuel guide rail multi-way valve for automobiles adopts a movable ball valve core, two end face cylinder plugs are arranged at both ends of the through hole, and a built-in channel is arranged in the end face cylinder plug, and the surface of the end face cylinder plug is opened to correspond with the built-in channel Through the oil inlet hole, although the valve solves the problem of reliable switching between two kinds of automobile fuels and pipeline sealing, the ball valve core piston can effectively reduce the resistance of the valve core piston to the reverse movement, and does not drift, but its processing accuracy is very demanding. High, the structure of the two end face cylinder plugs is complex, the cost is high, and when the fuel is switched, the pressure of the fuel propulsion is used to move the ball valve core to complete the switch. When the fuel pressure on one side is higher than the fuel pressure on the other side, the pressure on one side is released It is relatively slow, and the ball valve cannot seal the fuel on the other side for a short time, which may cause vibration when switching or cause the engine to stall, affecting driving safety

Due to the use of one fuel for a long time, the ball valve may not be able to return to the gasoline state, and there are more alternative fuels such as methanol remaining in the valve, which may cause difficulty or failure to start the next day

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