Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-02-01
1995-08-15
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
123 73A, 123478, F02D 4106
Patent
active
054410304
ABSTRACT:
A fuel injection system for a two-stroke cycle engine capable of keeping an air-fuel ratio of an air-fuel mixture for combustion at a low engine speed optimum to improve startability of the engine in a cold district. The system includes a low-speed basic injection time increment setting unit for setting a low-speed basic injection time increment Tfi depending on an engine speed N and a throttle opening .alpha., a low-speed crankcase temperature correction factor setting unit for setting a low-speed crankcase temperature correction factor KLc, time correction factor setting units for setting a time correction factor Kt which is decreased with an increase in crankcase temperature, as well as with lapse of time, and a low-speed injection time increment setting unit for setting a low-speed injection time increment TiL by multiplying the increment Tfi by the correction factors KLc and Kt. A fuel injection time setting unit is arranged so as to add the increment TiL to basic fuel injection time Tp to provide injection time Tp+TiL, which is then corrected depending on various conditions to operate fuel injection time Ti.
REFERENCES:
patent: 4960097 (1990-10-01), Tachibana et al.
patent: 5050559 (1991-09-01), Kurosu et al.
patent: 5191531 (1993-03-01), Kurosu et al.
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