Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1988-07-29
1989-12-12
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
123494, F02D 4104
Patent
active
048860271
ABSTRACT:
A method for calculating actual air charge temperature uses values of coolant temperature, ambient temperature and engine air flow. These parameters affect the intake manifold temperature which, in turn, affects the amount of heat that is transferred to the air from the manifold. The time constant associated with the manifold temperature keeps the actual air charge temperature from instantaneously achieving a steady state condition. A time constant in the actual air charge temperature calculation substantially tracks the time constant associated with the change in temperature of the manifold as it responds to changes in air flow conditions. This actual air charge temperture value can then be used to calculate an accurate air-fuel ratio.
REFERENCES:
patent: 4424783 (1984-01-01), Kotwicki
patent: 4495925 (1985-01-01), Hasegawa
patent: 4499879 (1985-02-01), Stoltman et al.
patent: 4594986 (1986-06-01), Shimoda et al.
patent: 4753206 (1988-06-01), Inove et al.
Creps Wendell D.
Orrell William B.
Argenbright Tony M.
Conkey Howard N.
General Motors Corporation
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