MULTIPLE THROTTLE MECHANISM OF INTERNAL COMBUSTION ENGINE

摘要

PURPOSE:To reduce the driving force of a throttle valve by mounting a set of more than two branch pipes through one block to reduce the friction resistance acting to a throttle shaft. CONSTITUTION:Branch passages 106a-106d consist of straight passages 116a-116d which pass through branch passage blocks 106A and 106B and bent passages 109a-109d which are formed in connection pipe parts 109A and 109B. Each of pairs of straight passages 116a and 116b and 116c and 116d has a single separation wall common to each of a pair of the straight pipe passages and throughholes through which throttle shafts 111A and 111B loosely run open in said separation wall, whereby enabling four bearing 123a-123d of being mounted. Thus both the number of the bearings of a multiple throttle mechanism and the shaft torque can be reduced.