Method of estimating the duration of target wheel teeth

Details Method of estimating the duration of target wheel teeth Method of estimating the duration of target wheel teeth

2007-12-20

2009-06-09

Patel, Harshad (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Testing of an individual engine part

C073S114260, C702S147000

Reexamination Certificate

active

07543486

ABSTRACT:
A method for determining as a function of time the angle of rotation of a crankshaft by estimating the position of missing teeth on a target wheel is disclosed which has application to engine control. A sensor acquires, as a function of time, a periodic signal comprising a pulsating waveform, each pulse indicating the passage of a tooth past this sensor. The position of a missing pulse on the signal is estimated from a missing tooth on the target wheel, by: estimating, during a cycle N, a time interval S between the passage past the sensor of a tooth dppreceding the missing tooth d and the passage past the sensor of a tooth dsfollowing missing tooth d, by means of the time interval between the passages of the same teeth during the previous cycle N−1 then, estimating the position of the missing pulse in this interval S, according to the position of the pulses in time interval A between the passage past the sensor of tooth ds−r and the passage past the sensor of tooth ds−r during cycle N, withr=lj2⁢⁢kthe engine being a j-stroke (2 or 4) engine and comprising k cylinders and a target wheel with l teeth, including the missing tooth; finally, determining as a function of time the crankshaft rotation angle by the modified signal.

REFERENCES:
patent: 3991727 (1976-11-01), Kawai et al.
patent: 4292670 (1981-09-01), Reid et al.
patent: 4305072 (1981-12-01), Makita
patent: 4553426 (1985-11-01), Capurka
patent: 4779214 (1988-10-01), Kinugasa
patent: 5386810 (1995-02-01), Gronenberg et al.
patent: 5537322 (1996-07-01), Denz et al.
patent: 5663495 (1997-09-01), Allen et al.
patent: 5671145 (1997-09-01), Krebs et al.
patent: 5757875 (1998-05-01), Ramseyer et al.
patent: 6334094 (2001-12-01), Hirakata et al.
patent: 6609498 (2003-08-01), Mathews et al.
patent: 7069173 (2006-06-01), Grant et al.
patent: 7096136 (2006-08-01), Bohnig et al.
patent: 101 54 155 (2003-05-01), None
patent: 1 424 479 (2004-06-01), None
patent: 1 462 638 (2004-09-01), None
patent: 2 691 207 (2003-11-01), None
patent: 2 860 069 (2005-03-01), None
patent: 2 357 849 (2001-07-01), None

Affiliated with

Also associated with

Rating

Method of estimating the duration of target wheel teeth 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 of estimating the duration of target wheel teeth, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of estimating the duration of target wheel teeth will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4146834