Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1998-04-10
1999-11-30
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
F02D 4114
Patent
active
059923890
ABSTRACT:
An intake air temperature TC of a cylinder is estimated from an equation of TC=TA+HEXGIN (TA-TA)+273.degree. K on the basis of a cylinder heat-transfer coefficient HEXGIN, an intake air temperature TA and a cooling water temperature TW. An operation of a first correction coefficient KTA is carried out on the basis of an equation KTA=TTC/TC with the use of an intake air temperature TTC estimated under reference environment. Next, an operation of a finally correction coefficient KTAHOS is carried out on the basis of an equation of KTAHOS=KTA.times.[1.0-{(KTA-1.0).times.KCHOS}] with the use of an air density fine adjustment coefficient KCHOS, and then, by taking advantage of the finally correction coefficient KTAHOS, a fuel injection quantity based on an intake air pressure is corrected.
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Unisia Jecs Corporation
Vo Hieu T.
Wolfe Willis R.
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