TIMING TRANSMISSION MECHANISM IN ENGINE

摘要

A timing transmission mechanism (T2) in an engine comprises a chain transmission device (C) including a drive sprocket (20) attached to a crankshaft (4), a driven sprocket (25) attached to the input shaft (24) of a high-pressure fuel pump (P), and a chain (22) stretched between the drive sprocket (20) and the driven sprocket (25); and a gear transmission device (G) including a drive gear (26) attached to the input shaft (24) coaxially to the driven sprocket (25) and a driven gear (27) attached to a camshaft (13b) and meshed with the drive gear (26). With such a constitution, the timing transmission mechanism, which enables an increase in the freedom of arrangement of the high-pressure fuel pump without necessity for increasing the number of parts, the weight and the backlash thereof, can be provided.