Valve acting cam shaft in internal-combustion engine

Abstract

Abstract PURPOSE:To obtain valve action in good efficiency of fuel consumption, by using a cam shaft which can obtain timing of the valve action in accordance with a speed of an internal-combustion engine. CONSTITUTION:The same one end location of each cam 11 integrally provided with a cam shaft 10 is formed to a cam shape 13 for high speed rotation and the same other end location of the cam 11 is formed to a cam shape 14 for low speed rotation, while an intermediate cam surface 15 is formed to a smooth curved face. The cam shaft 10 can be slided in the axial direction by a hydraulic ram 22, and a rotary speed detected by a speed detector 23 is compared with a preset speed, then a solenoid valve 25 is operated to control working fluid to the hydraulic ram 22. The cam shape 13 or 14 is selectively used in accordance with an engine speed, and ideal timing of valve action is obtained.

Inventors

• 👤 Miki Suzuki
• 👤 幹 鈴木

Bibliographic Details