US 2020/0173376 A1Published application

System and method of controlling engine provided with dual continuously variable valve duration device

AssigneesHyundai Motor Company, Kia Motors Corporation

InventorsJin Woo CHOUNG, Kiyoung KWON

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Abstract

A system of controlling an engine provided with a dual continuously variable valve duration device may include an engine, an intake valve for selectively supplying air or a mixture of the air and fuel to the combustion chamber, an ignition switch to ignite a burner to burn the mixture, and an exhaust valve disposed in the combustion chamber to selectively discharge exhaust gas in the combustion chamber to an outside of the combustion chamber, the dual continuously variable valve duration device provided to adjust an intake duration of the intake valve and an exhaust duration of the exhaust valve, a warm-up catalytic converter including a three-way catalyst for purifying hydrocarbons, carbon monoxide, nitrogen oxides contained in the exhaust gas downstream of the engine, and a controller for adjusting an ignition timing, the intake duration and the exhaust duration of the ignition switch based on a driving condition of a vehicle.

Claims16

Dependent claims

A system of controlling an engine provided with a dual continuously variable valve duration device, the system comprising:

the engine including a combustion chamber, an intake valve provided in the combustion chamber for selectively supplying air or a mixture of the air and fuel to the combustion chamber, an ignition switch provided in the combustion chamber to ignite a burner to burn the mixture, and an exhaust valve mounted in the combustion chamber to selectively discharge exhaust gas in the combustion chamber to an outside of the combustion chamber;
the dual continuously variable valve duration device provided to adjust a first intake duration of the intake valve and an exhaust duration of the exhaust valve;
a warm-up catalytic converter (WCC) including a three-way catalyst (TWC) for purifying hydrocarbons, carbon monoxide, nitrogen oxides contained in the exhaust gas downstream of the engine;
and
a controller configured for adjusting a first ignition timing, the first intake duration and the exhaust duration of the ignition switch based on a driving condition of a vehicle,
wherein the controller is configured to set the first ignition timing to a second ignition timing within a set ignition timing range,
wherein the controller is configured to set the first intake duration to a second intake duration within a set intake duration range, and
wherein the controller is configured to set the exhaust duration to an optimum exhaust duration such that a sum of engine emission amounts of nitrogen oxides (NOx) and hydrocarbons (HC) according to the set second intake duration is minimized when a temperature of the exhaust gas after engine startup is equal to or greater than a catalyst activation temperature.

5 more elements

A method of controlling an engine provided with a dual continuously variable valve duration device,

wherein the engine includes an intake valve, an ignition switch, and an exhaust valve, and the dual continuously variable valve duration device is provided to adjust a first intake duration of the intake valve and an exhaust duration of the exhaust valve, and
wherein the method of controlling the engine includes:
setting a first ignition timing to an optimum ignition timing according to a temperature of a target exhaust gas when the engine is started;
setting the first intake duration to a second intake duration within a set intake duration range;
setting the exhaust duration to an optimum exhaust duration such that a sum of engine emission amounts of nitrogen oxides (NOx) and hydrocarbons (HC) according to the set second intake duration is minimized;
determining when a temperature of exhaust gas is equal to or greater than a first predetermined temperature;
and
setting the exhaust duration to an optimum exhaust duration such that the sum of the engine emission amounts of the nitrogen oxides (NOx) and the hydrocarbons (HC) according to the set second intake duration is minimized when the temperature of the exhaust gas is equal to or greater than the first predetermined temperature.

5 more elements

A method of controlling an engine provided with a dual continuously variable valve duration device,

wherein the engine includes an intake valve, an ignition switch, and an exhaust valve, and the dual continuously variable valve duration device is provided to adjust a first intake duration of the intake valve and an exhaust duration of the exhaust valve, and
wherein the method of controlling the engine includes:
setting an ignition timing to an optimum ignition timing according to a temperature of a target exhaust gas when the engine is started;
setting the first intake duration to a second intake duration within a set intake duration range;
setting the exhaust duration to an optimum exhaust duration such that engine emission amounts of hydrocarbons (HC) according to the set second intake duration is minimized;
determining when a temperature of the exhaust gas is equal to or greater than a first predetermined temperature;
and
setting the exhaust duration to an optimum exhaust duration such that a sum of the engine emission amounts of nitrogen oxides (NOx) and the hydrocarbons (HC) according to the set second intake duration is minimized when the temperature of the exhaust gas is equal to or greater than the first predetermined temperature.

5 more elements

A method of controlling an engine provided with a dual continuously variable valve duration device,

wherein the engine includes an intake valve, an ignition switch, and an exhaust valve, and the dual continuously variable valve duration device is provided to adjust a first intake duration of the intake valve and an exhaust duration of the exhaust valve, and
wherein the method of controlling the engine includes:
setting a first ignition timing to an optimum ignition timing according to a temperature of a target exhaust gas when the engine is started;
setting the first intake duration to a second intake duration within a set intake duration range;
determining when the temperature of the exhaust gas is equal to or greater than a first predetermined temperature;
and
setting the exhaust duration to an optimum exhaust duration such that a sum of engine emission amounts of nitrogen oxides (NOx) and hydrocarbons (HC) according to the set second intake duration is minimized when the temperature of the exhaust gas is equal to or greater than the first predetermined temperature.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/425,214Filed 29 May 2019
Priority: KR 10-2018-01545314 Dec 2018
Published: 4 Jun 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification30 codes

F01N 3/101
By thermal or catalytic conversion of noxious components of exhaust: three-way catalysts
F02D 13/0219
Changing the valve timing only: by shifting the phase, i.e. the opening periods of the valves are constant
F01L 13/0047
The valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction: the…
F01N 9/00
Electrical control of exhaust gas treating apparatus