KR-102962268-B1 - APPARATUS OF CONTROLLING ACTIVE AIR FLAP

Abstract

A hybrid vehicle including an active air flap is disclosed. A hybrid vehicle including an active air flap according to an embodiment of the present invention may include a plurality of active air flaps installed in a front-end module; and a controller that controls the opening and closing of the plurality of active air flaps based on a coolant temperature according to the ambient temperature, an inverter temperature of a drive motor according to the ambient temperature, an inverter temperature of a starter generator according to the ambient temperature, a temperature of a low-voltage DC converter according to the ambient temperature, a transmission oil temperature according to the ambient temperature, or an engine oil temperature according to the ambient temperature, or controls the opening and closing of the plurality of active air flaps based on a refrigerant pressure according to the ambient temperature, or controls the opening and closing of the plurality of active air flaps based on an operating mode of a cooling fan, or controls the opening and closing of the plurality of active air flaps based on an intake temperature according to the ambient temperature for each driving mode of the vehicle.

Inventors

• 하동수
• 이장효
• 김종화
• 정민기
• 신동준
• 김태형

Assignees

• 현대자동차 주식회사
• 기아 주식회사

Dates

Publication Date

20260507

Application Date

20210910

Claims (13)

1. A plurality of active air flaps installed in the front end module of a hybrid vehicle; and A controller that controls the opening and closing of the plurality of active air flaps based on the cooling water temperature according to the ambient temperature; Includes, The above controller When the cooling water temperature according to the above ambient temperature reaches the first flap opening temperature, one of the plurality of active air flaps is opened, and When the cooling water temperature according to the above ambient temperature reaches the second flap opening temperature, another active air flap among the plurality of active air flaps is opened, and When the cooling water temperature according to the above ambient temperature reaches the first flap closing temperature, one of the plurality of active air flaps is blocked, and When the cooling water temperature according to the above ambient temperature reaches the second flap closing temperature, one of the other active air flaps among the plurality of active air flaps is blocked, and The first flap opening temperature, the second flap opening temperature, the first flap closing temperature, and the second flap closing temperature decrease as the ambient temperature increases, and The first flap opening temperature, the second flap opening temperature, the first flap closing temperature, and the second flap closing temperature are determined by reflecting a high-speed correction temperature according to vehicle speed and a high-load correction temperature according to engine load conditions, and Only when the vehicle speed is greater than or equal to the set speed, the high-speed correction temperature is reflected to determine the first flap opening temperature, the second flap opening temperature, the first flap closing temperature, and the second flap closing temperature. A hybrid vehicle in which, when the operating range of the above engine is a high-load range, the high-load correction temperature is reflected to determine the first flap opening temperature, the second flap opening temperature, the first flap closing temperature, and the second flap closing temperature.
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4. In paragraph 1, The second flap opening temperature is higher than the first flap opening temperature, and The second flap closing temperature is lower than the first flap closing temperature, and The first flap opening temperature is the same as the first flap closing temperature, and A hybrid vehicle in which the second flap opening temperature is higher than the second flap closing temperature.
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6. A plurality of active air flaps installed in the front end module of a hybrid vehicle; and A controller that controls the opening and closing of the plurality of active air flaps based on refrigerant pressure according to the ambient temperature; Includes, The above controller When the refrigerant pressure according to the above ambient temperature reaches the first flap opening pressure, one of the plurality of active air flaps is opened, and When the refrigerant pressure according to the above ambient temperature reaches the second flap opening pressure, another active air flap among the plurality of active air flaps is opened, and When the refrigerant pressure according to the above ambient temperature reaches the first flap closing pressure, one of the plurality of active air flaps is blocked, and When the refrigerant pressure according to the above ambient temperature reaches the second flap closing pressure, one of the other active air flaps among the plurality of active air flaps is blocked, and A hybrid vehicle in which the first flap opening pressure, the second flap opening pressure, the first flap closing pressure, and the second flap closing pressure decrease as the ambient temperature increases.
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8. In paragraph 6, The second flap opening pressure is higher than the first flap opening pressure, and The second flap closing pressure is lower than the first flap closing pressure, and The first flap opening pressure is higher than the first flap closing pressure, and A hybrid vehicle in which the second flap opening pressure is higher than the second flap closing pressure.
9. In paragraph 6, A hybrid vehicle in which the first flap opening pressure, the second flap opening pressure, the first flap closing pressure, and the second flap closing pressure are determined by reflecting a high-speed correction pressure according to vehicle speed.
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13. A plurality of active air flaps installed in the front end module of a hybrid vehicle; and A controller that controls the opening and closing of the plurality of active air flaps based on the intake temperature according to the ambient temperature for each driving mode of the vehicle; Includes, The above controller When the intake temperature according to the above ambient temperature reaches the first flap opening temperature, one of the plurality of active air flaps is opened, and When the intake temperature according to the above ambient temperature reaches the second flap opening temperature, another active air flap among the plurality of active air flaps is opened, and When the intake temperature according to the above ambient temperature reaches the first flap closing temperature, one of the plurality of active air flaps is blocked, and When the intake temperature according to the above ambient temperature reaches the second flap closing temperature, another active air flap among the plurality of active air flaps is blocked, and The above driving modes include EV mode (electric vehicle mode) and HEV mode (hybrid electric vehicle mode), and In the EV mode, the first flap opening temperature is higher than the first flap opening temperature in the HEV mode, and In the EV mode, the second flap opening temperature is higher than the second flap opening temperature in the HEV mode, and In the above EV mode, the first flap closing temperature is the same as the first flap closing temperature in the above HEV mode, and A hybrid vehicle in which the second flap closing temperature in the EV mode is the same as the second flap closing temperature in the HEV mode.

Description

Hybrid vehicle including active air flap {APPARATUS OF CONTROLLING ACTIVE AIR FLAP} The present invention relates to a hybrid vehicle including an active air flap, and more specifically, to a hybrid vehicle including an active air flap capable of improving fuel efficiency through the control of the active air flap according to the thermal load of the hybrid vehicle. Generally, the interior of the engine compartment of a hybrid vehicle is equipped with various heat exchangers such as radiators, intercoolers, evaporators, and condensers, as well as components for driving the hybrid vehicle, such as the engine. A heat exchange medium, such as a refrigerant, flows inside these components, and cooling or heat dissipation is achieved through heat exchange between the heat exchange medium inside the heat exchanger and the air outside the heat exchanger. Therefore, for the various heat exchangers in the engine compartment of a hybrid vehicle to operate stably, outside air must be smoothly supplied into the engine compartment. However, when a hybrid vehicle travels at high speeds, a large amount of outside air is drawn in at high speeds, increasing air resistance. This leads to a problem where the fuel efficiency of the hybrid vehicle deteriorates. To solve this problem, an active air flap device is used to improve fuel efficiency by allowing a large amount of air to flow into the engine compartment when the hybrid vehicle is driving at low speeds and a relatively small amount of air to flow into the engine compartment when the hybrid vehicle is driving at high speeds. Conventional active air flaps reduce air resistance and improve driving stability of a hybrid vehicle by closing the flap during high-speed driving, and lower the temperature inside the engine compartment by opening the flap when the temperature inside the engine compartment rises. However, research on improving fuel efficiency due to thermal loads inside hybrid vehicles (e.g., thermal loads generated from the engine, cooling module, and drive motor) is insufficient. The matters described in this background technology section are written to enhance understanding of the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. These drawings are for reference to explain exemplary embodiments of the present invention, and therefore, the technical concept of the present invention should not be interpreted as being limited to the attached drawings. FIG. 1 is a conceptual diagram illustrating the configuration of a hybrid vehicle according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating the configuration of a hybrid vehicle including an active air flap according to an embodiment of the present invention. FIG. 3 is a perspective view illustrating the configuration of an active air flap according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating a method for controlling an active air flap according to an embodiment of the present invention. FIG. 5 is a diagram illustrating the opening conditions of an active air flap according to the cooling water temperature according to the ambient temperature in accordance with an embodiment of the present invention. FIG. 6 is a diagram illustrating the opening conditions of an active air flap according to the first inverter temperature of a driving motor according to an embodiment of the present invention. FIG. 7 is a diagram illustrating the opening conditions of an active air flap based on the second inverter temperature of a starter generator according to the ambient temperature according to an embodiment of the present invention. FIG. 8 is a diagram illustrating the opening conditions of an active air flap based on the transmission oil temperature according to the ambient temperature according to an embodiment of the present invention. FIG. 9 is a diagram illustrating the opening conditions of an active air flap according to the engine oil temperature according to the ambient temperature in accordance with an embodiment of the present invention. FIG. 10 is a diagram illustrating the opening conditions of an active air flap according to the engine oil temperature according to the ambient temperature in accordance with an embodiment of the present invention. FIGS. 11 and 12 are diagrams illustrating the opening conditions of an active air flap according to the refrigerant pressure according to the ambient temperature in accordance with an embodiment of the present invention. FIG. 13 is a diagram illustrating the opening conditions of an active air flap based on the intake temperature according to the ambient temperature for each driving mode according to an embodiment of the present invention. Embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. Howeve