General gasoline engine cylinder head cover

Abstract

The invention discloses a cylinder brainpan for common gas engine, comprising inner cover of cylinder brainpan, outer cover of cylinder brainpan, cover of breathing chip and breathing chip. Breathing cavity is formed between inside wall of inner cover and outside wall of outer cover, in which cover of breathing chip and breathing chip are set. Said breathing chip is spring steel chip. Breathing chip is pasted to the outside wall of inner cover so as to cover breathing port. The cover of breathing chip is set on the breathing chip and is fixed on the inner cover of cylinder brain span with the breathing chip. One end of the cover of breathing chip is upswept so as to form limiting angle where breathing chip swings at the angle range and the other end have an end face guiding exhaust pipe. Because breathing chip is spring steel chip and is fixed with inner cover, solving the problem of bonding and lagging of breathing chip in basic, avoiding often open and often close phenomenon entirely are realized. Stable working of the breathing chip ensures air flow smooth and achieves balancing the air press in crankcase efficiently.

Description

technical field [0001] The invention relates to parts of a general gasoline engine, in particular to a cylinder head cover of a general gasoline engine. Background technique [0002] The general-purpose gasoline engine cylinder head cover is generally formed by tightly pressing the inner cover of the cylinder head cover and the outer cover of the cylinder head cover. A breathing chamber is formed between the outer wall of the inner cover and the inner wall of the outer cover. The breathing chamber communicates with the atmosphere. There is a breather port communicating the crankcase with the breather chamber. Above the breathing port, there is a breathing sheet cover that guides the exhaust pipe, and a breathing sheet in a free state is arranged in the breathing chamber below the breathing sheet cover, and the rising stroke of the breathing sheet is limited by the breathing sheet cover. When the piston descends and the gas is compressed, the breathing piece opens under posi...

AI Technical Summary

Problems solved by technology

The cylinder head cover with this structure has the following disadvantages: on the one hand, since the breathing piece is in a free state, it may move radially during its movement, resulting in a stagnation phenomenon, so that the breathing piece cannot be opened by positive pressure alone, making the breathing The port is in a normally closed state, resulting in excessive pressure in the crankcase and oil leakage from the oil seal.

At present, most general-purpose gasoline engine cylinder head covers use epoxy glass cloth laminates. After a general-purpose gasoline engine has been working for a period of time, a certain amount of waste oil will accumulate inside the cylinder head and on the breather, which will affect the cylinder head. gas flow rate, and it is easy to cause the breathing piece to stick to the inner wall of the breathing piece cover, so that the breathing piece cannot fall down only by the gravity and negative pressure of the breathing piece, and the breathing port is always open, which leads to the difference between the engine oil and the air in the crankcase A large amount of mixture enters the air filter, affecting oil consumption and engine power stability

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