Method for reducing the fuel supply for one engine cylinder

Details Method for reducing the fuel supply for one engine cylinder Method for reducing the fuel supply for one engine cylinder

1991-12-09

1994-01-04

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123481, F02D 4134

Patent

active

052751430

ABSTRACT:
In a method for reducing the fuel supply for one cylinder of a multi-cylinder internal combustion engine with centralized injection, the procedure is that the cylinder located in the intake cycle sequence in front of the cylinder whose mixture is to be made much leaner, for example because of unreliable combustion, is already supplied with less fuel than is the case when all cylinders are operable. In addition, the intake cycle for the failed cylinder itself is supplied with as little fuel as possible. Using this method, it is possible to set a very lean mixture in the failed cylinder but a mixture having a lambda value close to 1 in the remaining cylinders. This ensures that the motor vehicle in which the internal combustion engine with the failed cylinder is operating can still be reliably operated and, at the same time, there is no risk of overheating of the catalytic converter.

REFERENCES:
patent: 4485791 (1984-12-01), Sugo et al.
patent: 4532905 (1985-08-01), Yokooku et al.
patent: 4928228 (1990-05-01), Fujimoto et al.

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