1. Field of the Invention
The present invention relates to an air-inlet assistor for a vehicle engine. More particularly, the present invention is directed to a system for automatically keeping the air supply for an engine balanced.
2. Prior Art
In accordance with the operational principles of conventional vehicle engines, and with reference to FIG. 4, the amount of fresh air from the outside passing through the air cleaner 53 for supplying the running engine is dependent on the drawing in force of the inlet manifold 52 through the carburetor 51. The inlet pipe 54 is connected to the base stand 55 that is attached to the air cleaner 63, the inlet pipe being connected through an inlet valve 56 and a back valve 57, to form an air-inlet assistor for improving the full burning of fuel in the engine. The base stand 55 has a cubic shape and there is an L or S shaped channel passing through it, with one end connecting to the air cleaner 53 for cleaning the air, and the other end being connected to the inlet valve 56. The outlet of the back valve 57 is connected to the carburetor 51 of the engine 5. So when starting the engine, the drawing in force created in the inlet manifold 52 can draw the air into the engine 5 for burning the fuel.
Accordingly, the above-mentioned air-inlet controlling device has the following shortcomings:
1. The conventional air-inlet assistor cannot be adjusted automatically. If the user finds the air-inlet not providing sufficient air, so as to influence running, he would drive to the garage and leave it to a technician. Therefore, it is not convenient for the user. PA1 2. Adjustment of the conventional device is by manually changing the opening of the inlet valve, causing an additional factor that may influence the intake of air. It too much air is drawn, a mono-cylinder effect can be generated, resulting in a shaking of the vehicle. If the adjustment is in the opposite direction, the burning of fuel in the engine may be incomplete, increasing the waste of gas and adding to atmospheric pollution. PA1 3. Due to the many shortcomings of the conventional device, its production costs are increased. Also, special technicians are needed to install it, making it not practical for high volume production.
An object of the present invention is to provide an air-inlet assistor that can automatically adjust the air-inlet accurately, according to the vehicle, the engine, the differences in the drawing in force from the inlet manifold of the engine, and the different working state of the engine, to avoid the intake of air that is greater or less than needed, thereby keeping the engine running smoothly.