Burning chamber of overhead camshaft type motorcycle engine

• Main Authors: ZENG QIMING, GUO DONGSHAO, HU GUIJUN
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2008
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The utility model belongs to the engine filed and more particularly relates to a combustion chamber of a top-mounted cam shaft engine in a motorcycle. An inlet valve and an exhaust valve in the combustion chamber pit of the utility model are communicated with an inlet passage and an exhaust passage respectively, and the edge of the upper half circle of the pit is basically a shape of a semi-elliptical curve, while the edge of the lower half circle is basically an Omega-shaped curve formed by three continuous arc lines, and the two curves are connected in a smooth transition way, that is to say, the upper half part of the pit is an upper half cavity formed by the approximate semi-elliptical curve rotating for 90 DEG around the vertical axis, while the lower half part of the pit is a lower half cavity formed by the approximate Omega-shaped curve rotating for 90 DEG around the vertical axis. The combustion chamber of compact structure reduces the volume of the combustion chamber, increases the compression ratio,