Patent ID: 6044807
Filing Date: 2000-04-04
Classification: F01L,F02D,F02P

Abstract:
A reverse rotation control apparatus for a two-cycle engine mounted on a motor vehicle and driven in two cycles, comprising:a variety of sensors for generating a variety of information signals in correspondence to engine operating states; andan ignition control unit for generating an ignition signal for said engine on the basis of said variety of information signals,wherein said variety of sensors include at least a rotation sensor for generating a rotation signal corresponding to rotation of said engine and a reverse rotation switch for generating a reverse rotation command signal for changing over of engine rotation to a reverse rotation, andwherein said ignition control unit includes:ignition timing retard control means for causing ignition timing of said engine to retard beyond a top dead center upon inputting of said reverse rotation command signal;engine rotation number decision means for deciding whether or not rotation number of said engine is lowered to a predetermined rotation number suited for effectuating reverse rotation control; andexcessively advanced ignition signal generating means for outputting only once an ignition signal advanced excessively relative to a normal advanced ignition timing when said engine rotation number is lowered to said predetermined rotation number suited for effectuating the reverse rotation control,wherein said predetermined rotation number is set at a value smaller than an idling rotation number of said engine.