Diesel engine revolution counter
US5181232A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Apr 3, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The revolutions of a diesel engine are counted by providing vibration detector converting the vibration propagating through the fuel injection pipe into an electric signal; an amplitude sorter for receiving the electric output signal of the detector and providing an output signal when the amplitude becomes larger than a predetermined level; a waveform shaper for receiving the output signal of the sorter and converting respective pulse groups to single pulse outputs. The respective pulses from the sharper are judged to determine whether signal pulse in the present period is within a predetermined allowable range or not, and thereby determining whether respective pulses are "normal" pulses or not. The number of normal pulses per unit time are counted and displayed on a monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.