System and method for controlling camshaft timing, air/fuel rati

Details System and method for controlling camshaft timing, air/fuel rati System and method for controlling camshaft timing, air/fuel rati

1998-01-12

1999-12-28

Solis, Erick R.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123 9015, F02D 700

Patent

active

06006725&

ABSTRACT:
A system for controlling camshaft timing, air/fuel ratio and electronic throttle position in an automotive internal combustion engine uses a controller for operating a camshaft phaser, electronic throttle positioner and fuel injectors. The controller determines camshaft timing, steady-state electronic throttle position, steady-state fuel supply, and compensatory transient electronic throttle position, and transient fuel supply such that an engine operating with the present system has the torque output characteristics matching a conventional engine having fixed camshaft timing, but with lower fuel consumption and lower exhaust emissions than a conventional engine.

REFERENCES:
patent: 4789939 (1988-12-01), Hamburg
patent: 5199403 (1993-04-01), Akazaki et al.
patent: 5220904 (1993-06-01), Miyashita et al.
patent: 5357932 (1994-10-01), Clinton et al.
patent: 5690071 (1997-11-01), Jankovic
patent: 5724927 (1998-03-01), Suzuki
SAE 950973, "A New Engine Control System Using Direct Fuel Injection and Variable Valve Timing", Ohyama et al, Hitachi Ltd.
Proceedings of the ACC, Albuquerque, NM, Jun., 1997, "Disturbance Rejection in SI Engines With Variable Cam Timing", Jankovic et al.

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