Electromagnetic air valve drop damping device for internal combustion engine

Abstract

The invention relates to a damping device for the dropping of electromagnetic valve used on an internal combustion engine, which is characterized in comprising a container, and a flexible container fixedly connected with the bottom of the container; wherein, at least a hole communicated with the flexible container is arranged at the bottom of the container, and an atmospheric bypass pipe is communicated with the upper part of the container. In the invention, before the valve drops completely, the head of the valve contacts with the flexible container and presses the liquid in the flexible container to pass through the hole quickly; the liquid chafes with the small hole to generate a friction resistance, which can consume the impact force of the valve movement, and thus the dropping speed of the valve is slowed. The faster the valve goes upward, the larger the damping force produced, thus achieving the purposes of absorbing or eliminating the dropping impact of the valve. The invention has the advantages of simple structure, automatic adjustment, low cost and strong practicability.

Description

technical field [0001] The invention belongs to an accessory of a cycle operation valve device for a combustion engine, and relates to an electromagnetic valve seating damping device for an internal combustion engine. It is suitable for valve gears used in automobile engines or other internal combustion engines. Background technique [0002] When the engine speed is high, the valve return time is very short (if the engine speed reaches 6000 rpm, the valve return time is only 0.0025 seconds at most), and the movement speed is very fast (approximately calculated according to the valve stroke 8mm and the same acceleration return) , return speed is 6.4m / s). The invention patent application titled "An Electric Valve for Internal Combustion Engine" submitted at the same time as this application provides a valve seat ring and a valve guide installed on the cylinder head, a valve stem passing through the valve guide, and a The valve connected to the lower end of the valve stem, th...

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Problems solved by technology

The invention patent application titled "An Electric Valve for Internal Combustion Engine" submitted at the same time as this application provides a valve seat ring and a valve guide installed on the cylinder head, a valve stem passing through the valve guide, and a The valve connected to the lower end of the valve stem, the permanent magnet fixedly connected to the upper end of the valve stem, the annular valve spring set under the permanent magnet and sleeved outside the valve stem, the electromagnetic valve fixedly connected with the cylinder head under the permanent magnet, inside the valve spring Electromagnetic valves composed of iron, etc.; for this or similar electromagnetic valves without camshafts, if certain measures are not taken, when the valve hits the valve seat at the above speed, severe valve noise will be generated and affect the valve and valve seat. The service life of the ring may also lead to valve rebound, which affects the timely closing of the valve. For the intake valve, if it is not closed in time, the mixed gas that has entered the cylinder may return to the intake pipe, the charging efficiency will decrease, and the engine power cannot be fully exerted; If the exhaust valve is not closed in time, the unburned mixture will be discharged directly from the exhaust pipe, which cannot effectively burn and do work. At the same time, it will cause the exhaust gas to return to the cylinder, dilute the mixture, reduce the combustion rate, reduce power and increase fuel consumption.

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