Air-fuel ratio controller of internal combustion engine

Details Air-fuel ratio controller of internal combustion engine Air-fuel ratio controller of internal combustion engine

1989-03-10

1990-03-27

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

204425, F02D 4114, G01N 2746

Patent

active

049111302

ABSTRACT:
An air-fuel (A/F) controller of an internal combustion engine, which computes an average value of a plurality of duty ratios of the voltage supplied to the heater according to the engine speed and the engine load periodically detected during a period from a predetermined moment up to the present, and fixes said average value as the present duty ratio of the voltage to be supplied to the heater, since the A/F ratio sensor is heated not only by the heater but also by exhaust gas. The A/F ratio controller smoothes the variation of voltage to be supplied to the heater by applying the computed average value as the present duty ratio of the supply voltage which is to be supplied to the heater. Accordingly, even when the driving condition is in high-speed, variation of the temperature borne by the heater is mild and smooth, and thus, the temperature of the oxygen-concentration detecting element does not rise suddenly. Furthermore, the A/F ratio controller corrects the above-mentioned present duty ratio of the voltage to be supplied to the heater according to the supply voltage to be supplied to the heater.

REFERENCES:
patent: 4538575 (1985-09-01), Chujo et al.
patent: 4611562 (1986-09-01), Nakano et al.
patent: 4651402 (1985-12-01), Nakano et al.
patent: 4694809 (1987-09-01), Nakano et al.
patent: 4721084 (1988-01-01), Kawanabe et al.
patent: 4765298 (1988-08-01), Kojima et al.

Affiliated with

Also associated with

Rating

Air-fuel ratio controller of internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air-fuel ratio controller of internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air-fuel ratio controller of internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1643941