Observer for engine crankshaft torque
US6714852B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1006
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine crankshaft torque observer (10) and method of operation. An engine combustion process (14) is modeled (26) to develop modeled pressure estimates of combustion chamber pressures in engine cylinders according to certain engine inputs, such as fuel (20), EGR (22), and timing (24), that influence combustion chamber pressures. Kinematics (16) relating reciprocal motion of pistons in the engine cylinders to an engine crankshaft and engine friction (18) relating running friction of the engine to engine crankshaft rotation are also modeled (28; 30). A processor processes the certain engine inputs through the combustion process model to develop modeled pressure estimates which are processed through the kinematics model to develop modeled positive torque contribution due to combustion processes and through the friction model to develop modeled torque loss due to running friction. The modeled positive torque contribution due to combustion processes and the modeled torque loss due to running friction are processed to develop a measurement of indicted torque output of the engine. The combustion process model for developing modeled pressure estimates of combustion chamber pressures in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.