Method for controlling cooling system in vehicle
a cooling system and vehicle technology, applied in mechanical equipment, electric control, machines/engines, etc., can solve the problems of increased no/sub>x /sub>production, low fuel efficiency, and reduced combustion stability, so as to increase fuel efficiency and reduce nox emissions
Active Publication Date: 2016-04-07
HYUNDAI MOTOR CO LTD
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Benefits of technology
[0016]Various aspects of the present invention are directed to providing a method for controlling a cooling system in a vehicle, which optimizes a coolant temperature according to whether to use EGR or NOx emissions to increase fuel efficiency and to reduce NOx emissions.
Problems solved by technology
Under cold conditions immediately after starting a vehicle, fuel efficiency is low even though the engine is sufficiently warmed up.
That is because a high viscosity of oil increases engine friction, heavy heat loss occurs due to a low temperature of a cylinder wall, and combustion stability is decreased.
However, the above method has a problem of increased NOx production.
However, if the raising of the coolant temperature is controlled based on one map, it is difficult to reach the target EM level or target fuel efficiency due to variations in the surrounding environment or deterioration of the engine hardware.
Accordingly, if the raising of the coolant temperature is controlled based on one coolant temperature map without regard to whether to use EGR or NOx emissions, chances of improving the fuel efficiency may decrease.
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[0034]Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is / are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
[0035]A method for controlling a cooling system in a vehicle according to various embodiments of the present invention is configured to include an EGR use determination step (S20), a first coolant temperature management step (S30), and a second coolant temperature management step (S40).
[0036]Referring to FIG. 2, in the EGR use det...
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A method for controlling a cooling system in a vehicle, may include an Exhaust Gas Recirculation (EGR) use determination step of determining whether to use EGR, a first coolant temperature management step of controlling a coolant temperature using a first coolant temperature map based on an output value reflecting engine operating conditions when driving the vehicle using the EGR, and a second coolant temperature management step of controlling the coolant temperature using a second coolant temperature map in which a coolant temperature of the second coolant temperature map may be set to be higher than a coolant temperature of the first coolant temperature map in a same engine operation region when driving the vehicle not using the EGR.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to Korean Patent Application Number 10-2014-0132162 filed Oct. 1, 2014, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to a method for controlling a cooling system in a vehicle and, more particularly, to a method for controlling a cooling system in a vehicle, which optimizes a coolant temperature according to whether to use EGR or NOx emissions to increase fuel efficiency and to reduce NOx emissions.[0004]2. Description of Related Art[0005]Developing a fuel-efficient and eco-friendly vehicle has become more important due to worldwide fuel efficiency regulations and regulations limiting CO2 emissions. Leading automakers have actively researched and developed techniques for reducing vehicle fuel consumption to achieve the above goal.[0006]Under cold conditions ...
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IPC IPC(8): F02D41/02
CPCF02D41/0255F02D41/0065F02D41/068F02D41/1461F02D2200/021F02M26/28F01P7/167F01P2037/02F01P2060/04F01P2060/08F01P2060/16F02D41/2422F01P11/14
Inventor LEE, JUN YONG
Owner HYUNDAI MOTOR CO LTD
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