Method for controlling an internal combustion engine operating w

Details Method for controlling an internal combustion engine operating w Method for controlling an internal combustion engine operating w

1993-06-07

1995-02-21

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02M 1500

Patent

active

053906497

ABSTRACT:
An internal combustion engine operating with exhaust gas recirculation and including an intake-tube-pressure-guided injection system, has an intake tube with a throttle valve, an exhaust pipe, a return conduit branching off from the exhaust pipe and discharging into the intake tube downstream of the throttle valve, an exhaust gas recirculation valve being disposed in the return conduit and having a valve stroke, an actuator influencing a degree of opening of the conduit for controlling an exhaust gas recirculation rate, and a stroke sensor detecting a degree of opening of the exhaust gas recirculation valve over its valve stroke for establishing an optimal exhaust gas recirculation rate, and taking the degree of opening of the exhaust gas recirculation valve into account in a calculation of an injection time for injection valves. A method for controlling the internal combustion engine includes correcting the injection time with a pilot control value being dependent on rpm and on a pressure difference between an intake tube pressure in the intake tube and an exhaust gas counterpressure in the exhaust pipe, and weighting the pilot control value with a stroke factor being formed from the opening degree and a load-dependent, predetermined command value of the exhaust gas recirculation valve and taking a stroke influence into account.

REFERENCES:
patent: 4290404 (1981-09-01), Hata et al.
patent: 4509485 (1985-04-01), Hasegawa
patent: 4598684 (1986-07-01), Kato et al.
patent: 4683857 (1987-08-01), Yasuoka
patent: 4694812 (1987-09-01), Wendt
patent: 5103791 (1992-04-01), Tomisawa
patent: 5215068 (1993-06-01), Kato
patent: 5216881 (1993-06-01), Anlauf et al.

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