Control of an Exhaust Gas Aftertreatment Device in a Hybrid Vehicle
First Claim
1. A method for operating an internal combustion engine in a hybrid vehicle, the engine having a crankshaft, at least one cylinder and an exhaust gas aftertreatment device coupled to an exhaust of the engine, the hybrid vehicle having a fuel storage device and a fuel supply device, said method comprising:
- pumping air to the exhaust gas aftertreatment device when the engine is off;
commanding the fuel supply device to provide a desired amount of fuel to provide combustion in the exhaust gas aftertreatment device.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention involves a method for maintaining temperature in an exhaust gas treatment device for an internal combustion engine in a hybrid vehicle. The engine has a crankshaft and at least one cylinder. The hybrid vehicle has a fuel storage device and a fuel supply device. An exhaust gas treatment device is located downstream of the cylinder. The method comprises, in an engine off mode, pumping air to the exhaust gas aftertreatment device controlling the fuel supply device so that fuel is allowed to the exhaust gas aftertreatment device. Air flow to the exhaust gas aftertreatment device can be controlled by a throttle in an inlet duct to the engine and/or the fuel supply device to control the combustion and air-fuel ratio in the exhaust gas treatment device.
-
Citations
30 Claims
-
1. A method for operating an internal combustion engine in a hybrid vehicle, the engine having a crankshaft, at least one cylinder and an exhaust gas aftertreatment device coupled to an exhaust of the engine, the hybrid vehicle having a fuel storage device and a fuel supply device, said method comprising:
-
pumping air to the exhaust gas aftertreatment device when the engine is off; commanding the fuel supply device to provide a desired amount of fuel to provide combustion in the exhaust gas aftertreatment device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method for operating a hybrid propulsion system, said propulsion system having an internal combustion engine and an additional power source, the engine having a crankshaft, at least one cylinder, an exhaust gas aftertreatment device coupled to an exhaust of the engine, a fuel tank for supplying fuel to the engine'"'"'s at least one fuel injector, said method comprising:
-
pumping air to the exhaust gas aftertreatment device when the engine is off by rotating the crankshaft by said additional power source; commanding at least one fuel injector to inject fuel, said fuel transported through said at least one cylinder to the exhaust gas aftertreatment device. - View Dependent Claims (16, 17)
-
- 18. A hybrid vehicle propulsion system having an internal combustion engine and an additional power source, the internal combustion engine having a crankshaft and at least one cylinder, the hybrid vehicle propulsion system further having a fuel storage device, a fuel supply device coupled to the fuel storage device and disposed in the engine, an exhaust gas treatment device located downstream of the at least one cylinder, and a control unit electronically coupled to the fuel supply device and the additional power source, wherein said control unit causes the engine to be rotated by the additional power source while commanding the fuel supply device to provide fuel to the engine when the engine is off.
Specification