Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1995-09-28
1996-09-24
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Fuel injection system
123497, F02M 4100, F02M 3704
Patent
active
055580637
ABSTRACT:
A fuel supply system for an engine comprises a fuel pump for supplying fuel to fuel injectors, a pump controller which increases the fuel delivery flow rate from the fuel pump during hot restarting or high load running of the engine and a pressure regulator disposed in a fuel supply passage between the fuel pump and the injectors for adjusting the fuel supply pressure at which fuel is supplied to the injectors. The pressure regulator adjusts the fuel supply pressure according to an excess fuel flow rate of fuel returned to the fuel tank from the pressure regulator to a low-pressure side control pressure region over a first excess fuel flow rate range and to a high-pressure side control pressure region over a second excess fuel flow rate range. Based on simple electronic control of the fuel pump the pressure regulator keeps the fuel supply pressure in the high-pressure side control pressure region during hot restarting and high load running of the engine and thereby suppresses the arrival of fuel vapor at the injectors and improves the hot restarting and high load running characteristics of the engine.
REFERENCES:
patent: 3862751 (1975-01-01), Schwaller
patent: 4635606 (1987-01-01), Koike et al.
patent: 4825903 (1989-05-01), Ochs et al.
patent: 5035223 (1991-07-01), Watanabe
patent: 5069111 (1991-12-01), Loffler et al.
patent: 5237975 (1993-08-01), Betki et al.
patent: 5265644 (1993-11-01), Tuckey
patent: 5359976 (1994-11-01), Nakashima et al.
Akiba Takashi
Minagawa Kazuji
Oi Kiyotoshi
Moulis Thomas N.
Nippondenso Co. Ltd.
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