Automatic control mechanism of carbureter air choke valve of general gasoline motor

Abstract

The invention discloses an automatic control mechanism of a carbureter air choke valve of a general gasoline motor. A control device for driving the air choke valve to open is rotatably connected on a fan wind scooper of the general gasoline motor; one end of the control device is a blade, and the other end is a control arm; a rotatable center axle sleeve is arranged between the blade and the control arm and is in a clearance fit with a shaft arranged on the side wall of the fan wind scooper; the blade extends into the fan wind scooper and is arranged in an air duct; one end of the shaft of the air choke valve is provided with a crank; a first pull rod is connected between the crank and the control arm; the shaft of the air choke valve is movably sleeved with a stop block; a thermo-sensitive mechanism is arranged on a muffler; a second pull rod is connected between the stop block and the thermo-sensitive mechanism; and the shaft of the air choke valve is sleeved with an offset torsional spring enabling the air choke valve to be always in closes state. The automatic control mechanism enables the air choke valve to keep the open state in the thermomechanical condition and to automatically close in the cooling-down condition, and ensures the general gasoline motor can be normally and smoothly started up in both cooling-down and thermomechanical conditions.

Description

technical field [0001] The invention relates to a control mechanism of a carburetor choke valve, in particular to an automatic control mechanism of a carburetor choke valve of a general gasoline engine. Background technique [0002] The choke valve of the carburetor is an important part of the gasoline engine using the carburetor to control the air intake into the carburetor, which has a great influence on the starting performance of the gasoline engine. The choke valve is in the closed position when the gasoline engine starts cold, so that the amount of air entering the carburetor is reduced, and the vacuum degree at the throat is increased, so that more gasoline can be sucked out, and the mixed gas formed in the carburetor becomes thicker. To meet the requirement of a richer mixture gas when starting the gasoline engine, so that the gasoline engine is easier to start quickly; once the idle speed of the gasoline engine is stable after starting, the choke valve should be ope...

AI Technical Summary

Problems solved by technology

Although this automatic choke control mechanism solves the cumbersome and existing deficiencies of manually controlling the choke, another problem arises, that is, once the engine stops, the choke will automatically close. Or hot engine state, the choke valve is in the closed state to make the mixture rich

However, the requirements for starting the engine in a cold engine state are different from those in a hot engine state. When starting a cold engine, it is necessary to close the choke valve to make the mixed gas reach a concentration that is conducive to ignition; In a high temperature state, the gasoline in the carburetor is more likely to vaporize, and the mixed gas is too thick. In this case, if the choke valve is still closed, the mixed gas will be too rich, making it difficult or even impossible to start the engine.

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