TWO-STROKE INTERNAL COMBUSTION ENGINE Russian patent published in 1995 - IPC

FIELD: engine engineering. SUBSTANCE: two-stroke internal combustion engine has cylinder 1 piston 5 received in the cylinder, and cylinder head 6. At least one blowing passage 3, which is opposite to outlet passage 2, is made in the wall of the cylinder. Passage 2 has the top and bottom walls. The cylinder head has conical combustion chamber 7 provided with hollow 9. The hollow is arranged above blowing passage 3 and is a semi-ellipsoid whose grater axis is parallel to the generatrix of conical surface 9 of combustion chamber 7 and arranged in symmetry plane of the blowing and outlet passages. Top wall 10 of inlet part 11 of outlet passage 2 is located in plane 12 and is tangent to circumference 13 which is in plane of symmetry of blowing 3 and outlet 2 passages and whose radius is equal to the grater radius of semi-ellipsoidal hollow 8 of the combustion chamber and conjugated with it. The bottom wall of inlet part 11 of the outlet passage is parallel to top wall 10. The width of blowing passage 3, which is opposite to outlet passage 2, is equal to width of hollow 8 of combustion chamber 7. The height of the outlet port and the height of the port of each blowing passage are 0.28:0.31 and 0.17:0.18 of piston stroke respectively. EFFECT: enhanced efficiency. 3 cl, 2 dwg