Method of smoke limiting engine
AssigneeDetroit Diesel Corporation
InventorMin Sun
Life of this patent
Estimating the term…
Abstract
Method of smoke limiting an engine. The method may include determining a minimum air/fuel (AFR) ratio and fuel limiting as a function thereof. The method may include determining a maximum fueling rate as a function of the minimum AFR and air mass flow to the engine. The method may include controlling the engine according to a requested fueling rate unless the requested fueling rate is greater than the maximum allowable fueling rate.
Claims23
A method of controlling an internal combustion engine having exhaust gas recirculation (EGR) capabilities, the method comprising:
- determining a minimum smoke limiting air/fuel ratio (AFR), the smoke limiting AFR being determined as a function of engine load to limit black smoke emissions;
- determining a maximum allowable fueling rate as a function of the minimum AFR and air mass flow rate to the engine, the air mass flow rate compensating for EGR flow to the engine;
- and
- controlling the engine according to the maximum allowable fueling rate if a requested fueling rate is greater than the maximum allowable fueling rate.
A method of smoke limiting an engine, the method comprising:
- determining a minimum smoke limiting air/fuel ratio (AFR), the smoke limiting AFR being determined as a function of an limited-increment load to limit smoke emissions, the limited-increment load being determined as a function of requested engine load;
- determining a maximum allowable fueling rate as a function of the minimum AFR and air mass flow rate to the engine;
- and
- controlling the engine according to the maximum allowable fueling rate if a requested fueling rate is greater than the maximum allowable fueling rate.
A method of smoke limiting an engine, the method comprising:
- determining a minimum smoke limiting air/fuel ratio (AFR), the smoke limiting AFR being determined as a function of engine load and speed to limit smoke emissions;
- determining a maximum allowable fueling rate as a function of the minimum AFR and air mass flow rate to the engine;
- determining an exhaust gas recirculation (EGR) status as a function of the engine load and speed;
- and
- controlling the engine according to the maximum allowable fueling rate and the EGR status.
Dependencies are inferred from the claim text.