Four stroke petrol engine function in new method

摘要

The new pattern four stroke petrol engine functions under, the toothed wheel fitted with : crank shaft and cam shaft in the ratio of 1:4 that is through the timing chain, when the crank shaft makes 4 times rotation, while the cam shaft makes one rotation. Therefore if the crank shaft rotates 180° then the cam shaft rotates 45°. On the head of the engine cam-1, cam-2, cam-3 and cam-4 have been fitted with cam shafts and also shafts that contain four valves which are named as valve-1, valve-2, valve-3 and valve-4. Among these valves, when the valve-1 or valve-3 being to open, the mixture of petrol air will enter into the engine form the carburetor. When the valve-2 or valve-4 .opens, the smoke cornea out of the engine and enter in to the exhaust pipe. Cam-l(from 0°to 45°) that fits with the cam shaft, this make to open the valve -1; when cam-2 (from 136°tol80°) that fits with the cam shaft, this make to open the valve-2; cam- 3 (from i81°to225°) that fits with the cam shaft, this make to open valve-3; and when cam-4(from316°to360°) that fits with the cam shaft, that make to open the valve-4. When Piston from the Top Dead Centre (TDC) begins to reach the Bottom Dead Centre (BDC) then the crank shaft makes rotation from zero degree (0°). Likewise, the cam-1 begins to open the valve-1 at zero degree (0°). If increase the width of the cams one degree front side, then the valves of the cams will be opened four degree in advance. Likewise If increase the width of the cams one degree in back side then the valves of the cams will be closed four degree later. So we can change the width of the cams as per ourselves, When the four stroke petrol engine runs from Stroke one to stroke four, then the valve-1 and valve-2 as well as when the stroke repeated from one to four then the valve-3 and valve-4 will be activate in alternatively. This new patterned four stroke petrol engine is applicable for motor cycle, scooter, car and boat.