Method for controlling valve operating characteristic and air-fu

Details Method for controlling valve operating characteristic and air-fu Method for controlling valve operating characteristic and air-fu

1995-06-07

1997-03-04

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123 9015, F02D 4304, F02D 1302

Patent

active

056069600

ABSTRACT:
In an internal combustion engine in which the valve operating characteristic for intake valves can be switched, and the air-fuel ratio can be switched between a relatively lean level and a relatively rich level, the air-fuel ratio is switched in accordance with a change in engine operating condition. The valve operating characteristic for intake valves is switched substantially synchronously with the switching of the air-fuel ratio, between an operating condition-suited valve operating characteristic suited to an engine operating condition before the switching of the air-fuel ratio and an operating condition-suited valve operating characteristic suited to an engine operating condition after the switching of the air-fuel ratio, via an operating condition-unsuited valve operating characteristic which is not suited to the engine operating condition after the switching of the air-fuel ratio, so as to provide an engine output which is a middle value between engine outputs before and after the switching of the air-fuel ratio. Thus, it is possible to moderate the torque shock produced upon the switching of the air-fuel ratio, while inhibiting the generation of NOx.

REFERENCES:
patent: 5060604 (1991-10-01), Seki et al.
patent: 5220904 (1993-06-01), Miyashita et al.
patent: 5443050 (1995-08-01), Hitomi et al.

Affiliated with

Also associated with

Rating

Method for controlling valve operating characteristic and air-fu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for controlling valve operating characteristic and air-fu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling valve operating characteristic and air-fu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2139474