Length variable intake manifold

Abstract

A length variable intake manifold comprises an intake manifold main body, the resonant cavity and a flange; the left side section of the intake manifold main body and one side of the resonant cavity form into a whole which cannot move; the right side section of the intake manifold main body and the flange form into a whole which cannot be separated; the middle section of the intake manifold main body can slide in a reciprocating mode to achieve the length change of the intake manifold; the intake manifold main body is provided with an air channel length variable mechanism which comprises a solenoid valve, a vacuum hose, an actuator, a valve plate, a bearing and a rotating shaft; the solenoid valve can receive signals sent from an engine control unit when an engine reaches the set rotational speed, the signals are output to the actuator, the rotating shaft is driven by the actuator to rotate, and accordingly the valve plate swings to drive the middle section to move and the length change of the intake manifold is performed. According to the length variable intake manifold, the torque characteristics of the engine are improved and accordingly the vehicle power performance is improved and the oil consumption and emission is effectively improved.

Description

technical field [0001] The invention relates to a power device, in particular to a variable-length intake manifold. Background technique [0002] Existing small-displacement gasoline engines usually have 3 or 4 air passages in their plastic intake manifolds, and each air passage is a fixed-length air passage. Inflating efficiency requirements under the following conditions, that is, to ensure the output torque requirement of the engine at low speed, the power requirement at high speed, reduce engine fuel consumption and reduce NOX emissions. [0003] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a variable-length intake manifold with a new structure to overcome the above-mentioned defects. Contents of the invention [0004] In view of this, the object of the present invention is to provide a variable-length intake manifold, which can meet the output torque requirement of the engine at low speed and the power requirement at high s...

AI Technical Summary

Problems solved by technology

[0002] Existing small-displacement gasoline engines usually have 3 or 4 air passages in their plastic intake manifolds, and each air passage is a fixed-length air passage. Under the charging efficiency requirements, that is to ensure the output torque requirements of the engine at low speeds, the power requirements at high speeds and reduce engine fuel consumption and reduce NOX emissions

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