Automotive Dual Fuel Rail Multi-way Valve

Abstract

The invention belongs to the field of automobile dual fuel guide rail switching devices, and discloses an automobile duel fuel guide rail multi-way valve. The multi-way valve includes a casing, two end surface cylinder plugs, and a valve core piston, wherein a through hole is formed in the casing, the movable valve core piston is arranged in the through hole, the two end surface cylinder plugs are arranged at the two ends of the through hole, an internal passage is arranged in each end surface cylinder plug, and an oil inlet hole is formed in the surface of each end surface cylinder plug and communicated with the corresponding internal passage; guide rail mounting holes are respectively formed in the two ends of the casing, and are respectively communicated with the oil inlet holes in the two end surface cylinder plugs; an ejector mounting hole is formed in the casing and communicated with the center of the through hole. The device has the advantages that two automobile fuel guide rails can be reliably switched and share one ejector, the pipeline airtightness is good, drifting of the valve core piston is prevented, and the operation is stable; mixing of two fuels is avoided during switching, so that one fuel can be effectively prevented from entering a fuel tank for the other fuel during switching. The automobile duel fuel guide rail multi-way valve can be widely mounted in various types of automobiles.

Description

Technical field [0001] The invention relates to an automobile dual-fuel rail fuel switching device, in particular to an automobile dual-fuel rail multi-way valve. Background technique [0002] With the focus on vehicle economy and alternative fuel economy and environmental protection, automakers and the modification market are turning to more economical and environmentally friendly vehicles in order to improve efficiency, energy conservation and environmental protection, so alternative fuels or dual-use fuels or multiple fuels are effective The use requires a unique configuration of related components of the traditional fuel engine, and a good switching device is required when used to replace two fuel supplies. The general single-track single-injection system in the prior art uses a set of methanol pipelines in parallel through the solenoid valve and the like before the injection rail and injector of the original car. The structure is simple and the modification is not possible. ...

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 difficulty

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 there is too much methanol mixed in the gasoline tank, it will cause the starting problem of the vehicle. Incomplete methanol will permeate 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 mixing amount of the two fuels in the cylinder is relatively large, and the engine will shake when the fuel is switched to each other.

The fifth is to install pipes or guide rails on the upper part of the three-way valve, which increases the height of the guide rails, which will affect the installation for compact vehicles

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