Reverse rotation control system for two-cycle engine of motor ve

Details Reverse rotation control system for two-cycle engine of motor ve Reverse rotation control system for two-cycle engine of motor ve

1998-08-11

1999-10-12

Yuen, Henry C.

Internal-combustion engines

Cooling

With jacketed head and/or cylinder

123 41R, 12340614, 123 65R, F01L 1302

Patent

active

059641916

ABSTRACT:
A reverse rotation control system for a two-cycle engine of a motor vehicle which can be implemented inexpensively while preventing exhaust gas from degradation. The system includes a variety of sensors for generating signals corresponding to engine operation states, and an ignition control unit (10A) for generating an ignition signal (P) on the basis of the various signals. The sensors include a rotation sensor (6) for generating a rotation signal (SG) indicating engine rotation number (Re) and a reverse rotation switch (23) for generating a reverse rotation command signal (RW). The ignition control unit (10A) includes a means for causing the rotation number (Re) of the engine (1) to be lowered to a first predetermined engine rotation number (ReW1) through ignition timing retarding control upon inputting of the reverse rotation command signal, a means for arithmetically determining on the basis of engine state a timer period (TM) over which misfire is caused to occur successively, a means for causing the misfire to occur only for the timer period (TM) from the first predetermined engine rotation number (ReW1) to a second predetermined engine rotation number (ReW2), and a means for outputting only once an overadvanced ignition signal upon termination of the timer period (TM) which corresponds to a time taken for the engine rotation number (Re) to lower to the second predetermined engine rotation number (ReW2) during the misfire control.

REFERENCES:
patent: 5036802 (1991-08-01), D'Amours
patent: 5782210 (1998-07-01), Venturoli et al.
patent: 5794574 (1998-08-01), Bostelmann

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