Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1996-01-04
1997-04-01
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
731173, 123478, F02D 4134
Patent
active
056156570
ABSTRACT:
An intake air pressure Pm downstream of a throttle valve of an internal combustion engine is estimated by computation from a basic fuel injection quantity Tp set for an intake air flow rate Q and an engine rotational speed Ne, an intake air temperature TA, and an intake air volumetric efficiency .eta., according to the equation Pm=C.multidot.Tp.multidot.TA/.eta.. The estimated intake air pressure Pm is then used in a fuel supply control system wherein the fuel injection pressure from a fuel injection valve is such that a differential pressure relative to atmospheric pressure is constant, to thereby correct the fuel injection period of the fuel injection valve. As a result, there is no requirement for a sensor for detecting intake air pressure. Moreover, since a reference pressure chamber of the pressure regulator can be opened to the atmosphere, piping can be shortened, enabling a more compact unit.
REFERENCES:
patent: 5068794 (1991-11-01), Hosaka
patent: 5211150 (1993-05-01), Anzai
patent: 5215062 (1993-06-01), Asano et al.
patent: 5270935 (1993-12-01), Dudek et al.
patent: 5293553 (1994-03-01), Dudek et al.
patent: 5505179 (1996-04-01), Brennan
Argenbright Tony M.
Unisia Jecs Corporation
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