Internal combustion engine torque measurement device and method
US5771483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1997 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | May 1, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This method includes detecting the passage before a sensor of each of the teeth of the inertial flywheel of an engine; measuring the time of passage d.sub.i of each of these teeth; constituting a measurement horizon extending on both sides of the angular range of the explosions; dividing this measurement horizon into eight sets of teeth of equal length of which six are for the angular range of the explosions; measuring the passage times of these eight sets and in assigning them a rank in the measurement horizon du.sub.+1, du.sub.0, . . . , du.sub.5, du.sub.+1 ; calculating the period of the explosions T=du.sub.0 +du.sub.+1 +du.sub.2 +du.sub.3 +du.sub.4 +du.sub.5 ; calculating a term Q.sub.c =2du.sub.0 -du.sub.-1 -du.sub.3 -du.sub.+1 +2du.sub.5 ; calculating a term D.sub.c =p.multidot.Q.sub.c where p=.pi./2.sqroot.3, a constant stored in a memory; and calculating the desired torque using the relation Cg.sub.c =A.multidot.D.sub.c /T.sup.3 +B/T.sup.2 in which A and B are constants stored in a memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.