Single-intake double-exhaust variable tappet mechanism

Abstract

The invention relates to a single-intake double-exhaust variable tappet mechanism. By means of the single-intake double-exhaust variable tappet mechanism, each air cylinder of an intake supercharged engine is provided with one intake valve and two exhaust valves; when an automobile runs, the intake supercharged engine works in a four-stroke circulation state, and the power loss caused by exhaust is reduced by increasing the sectional area of an exhaust channel to reduce the exhaust resistance; after the automobile enters a geared sliding state, the four-stroke circulation operation of the engine can be changed into two-stroke circulation operation of air suction and air exhaust, so that the operation resistance is reduced. When the automobile enters geared decelerating operation, the engine is changed into an air compressor, and the four-stroke circulation operation is changed into circulation mode operation of an intake stroke (intake of the intake valve), a compression stroke (deflation of the exhaust valves when the compression stroke is about to end), a vacuumizing stroke (exhaust is closed short after the original expansion stroke starts) and an exhaust stroke (exhaust of theexhaust valve), so that the operation resistance of the engine is increased to generate braking slow-acting efficiency.

Description

[0001] 1. Technical field [0002] The invention relates to a single-inlet and double-row variable tappet mechanism, which is a technical solution for air intake and exhaust applied to an intake booster engine. Compared with the gas distribution system, it has the following advantages: when outputting power, it operates in a four-stroke cycle mode of "intake stroke, compression stroke, expansion stroke, exhaust stroke", the cross-sectional area of ​​the exhaust passage is larger, the structure is simpler, and the exhaust The air loss power is smaller; when sliding with gears, it operates in the two-stroke cycle mode of intake stroke and exhaust stroke, so that the engine running resistance is smaller; Compression stroke near the end of pressure relief), vacuum stroke, exhaust stroke "four-stroke cycle mode operation, the engine running resistance is greater, to provide the vehicle with engine braking retardation performance. [0003] 2. Background technology [0004] At presen...

AI Technical Summary

Problems solved by technology

[0004] At present, the known variable tappet gas distribution system has the following defects: the cross-sectional area of ​​the intake passage is larger than that of the exhaust passage, and when the engine outputs power, the exhaust resistance is relatively large, resulting in a large exhaust power loss ; also do not have: when outputting power, run with the four-stroke cycle mode of "intake stroke, compression stroke, expansion stroke, exhaust stroke"; Cycle mode operation; the function of operating in a four-stroke cycle mode of "intake stroke, compression stroke (pressure release near the end of the compression stroke), vacuum stroke, and exhaust stroke" when driving with gears and deceleration

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