System and method of stabilizing combustion of hybrid electric vehicle
AssigneeHyundai Motor Company
InventorsYong Seok Kim, Sanghoon Lee, Sang Eun Bae, Jeong Ki Huh
Life of this patent
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Abstract
A system and method of stabilizing combustion in the engine of a hybrid electric vehicle. The system includes a controller controlling a starter and an injector, wherein the controller causes the starter to rotate the engine without fuel injection before starting the engine after an engine starting condition is satisfied or after an engine stop condition is satisfied and the engine is stopped.
Claims17
A system of stabilizing combustion comprising:
- an engine having a combustion chamber, an intake manifold and an exhaust manifold;
- an injector supplying fuel into the intake manifold or the combustion chamber;
- a starter connected to the engine and rotating the engine with or without the fuel being supplied;
- an intake duct connected to the intake manifold and supplying air to the intake manifold;
- an exhaust pipe connected to the exhaust manifold and discharging an exhaust gas to an exterior of the engine;
- a recirculation pipe fluidly communicating the exhaust pipe with the intake manifold or the intake duct and recirculating a portion of the exhaust gas to the intake manifold or the intake duct;
- an exhaust gas recirculation module controlling the amount of the exhaust gas recirculated to the intake manifold or the intake duct;
- and
- a controller monitoring a vehicle operation state and controlling operation of the starter and the injector,
- wherein the controller controls the starter to rotate the engine without fuel injection before starting the engine after an engine starting condition is satisfied or after an engine stop condition is satisfied and the engine is stopped.
A method of stabilizing combustion in a hybrid electric vehicle, the hybrid electric vehicle using a drive motor and an engine as power sources and comprising an injector supplying fuel into the engine, a starter rotating the engine with or without the fuel being supplied by the injector, and an exhaust gas recirculation module recirculating a portion of an exhaust gas generated in the engine back into the engine, the method comprising:
- monitoring a vehicle operation state;
- determining whether an engine starting condition is satisfied;
- and
- having the controller cause the starter to rotate the engine without fuel injection for a predetermined number of rotations or for a predetermined time if the engine starting condition is satisfied.
A method of stabilizing combustion in a hybrid electric vehicle, the hybrid electric vehicle using a drive motor and an engine as power sources and comprising an injector supplying fuel into the engine, a starter rotating the engine with or without the fuel being supplied by the injector, an exhaust gas recirculation module recirculating a portion of an exhaust gas generated in the engine back into the engine, a transmission outputting power of the drive motor or power of the engine with or without power conversion, and a selective connecting device selectively connecting the engine with the transmission, the method comprising:
- monitoring a vehicle operation state when the vehicle runs with the power of the engine or with both of the power of the engine and the power of the motor;
- determining whether an engine stop condition is satisfied;
- having the controller cause the selective connecting device to disconnect the transmission from the engine and stop fuel injection if the engine stop condition is satisfied;
- and
- having the controller cause the starter to rotate the engine for a predetermined number of rotations or for a predetermined time.
Dependencies are inferred from the claim text.