ENGINE

• Main Author: GOMI TOMOKI
• Format: Patent
• Language: English
• Published: 24.10.2013
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; 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; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide an engine capable of improving fuel economy and reducing NOx in exhaust gas without excessively increasing manufacturing costs.SOLUTION: An extension cam 42 having a shape in which a surface 45a at the opposite side in a rotation direction of a nose part 41 bulges is attached to a camshaft 14 rotated in conjunction with a crankshaft 14, adjacently to a normal cam 32 operating an intake valve 10. When determining that an operation state of a diesel engine 1 is a steady operation state excluding warm-up operation and a load of the engine becomes 50% or less, an ECU 43 actuates an actuator 44 to slide a camshaft 31 in a longitudinal direction. Accordingly, the normal cam 32 is switched to the extension cam 42 to delay the timing at which the intake valve 10 closes an intake port 11.