System for controlling air flow to a cooling system of an internal combustion engine
US6045482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1998 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Mar 2, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2060/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for controlling air flow to an engine cooling system includes a control computer responsive to a number of engine and/or engine accessory operating conditions, and to various engine operational states to control operation of an engine cooling device. The engine operational states are each a function of at least engine fueling commands and include a "free energy" state corresponding to zero fueling, an "absorbing additional torque" state corresponding to zero fueling and activation of either service brakes or engine brakes, and a "needs additional torque" state corresponding to a rapid positive change in fueling, recent gear shifting to the lower gears of the transmission with fueling above a predefined level or a high rate of change in fueling rate. All other engine operational states are defined as a don't care state. The control computer is operable to control the engine cooling device as a function of the number of engine and/or engine accessory operating conditions and a current engine operating state, wherein examples of the engine and/or engine accessory operating conditions include engine coolant temperature, rate of change of engine coolant temperature, intake mani…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.