HSG cooling control device and HSG cooling control method for hybrid vehicle and hybrid vehicle including the device

Abstract

The present invention provides a hybrid starter and generator (HSG) cooling control device and HSG cooling control method for a hybrid vehicle, and a hybrid vehicle including the device. The device includes: a receiver configured to receive driving information of an engine and driving information of an HSG; a cooling unit configured to cool the HSG; and a controller configured to control the cooling unit; wherein the controller determines whether the HSG is in an idle charging mode based on the driving information of the engine and the driving information of the HSG; when the HSG is in the idle charging mode, the controller determines whether the temperature of the HSG is higher than a first cooling requirement temperature; and when the temperature of the HSG is higher than the first cooling requirement temperature, the controller controls the cooling unit to start.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2019-0047814, filed on Apr. 24, 2019, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present invention relates to a hybrid starter and generator (HSG) cooling control device of a hybrid vehicle, and more specifically, to an HSG cooling control device and an HSG cooling control method of a hybrid vehicle, and a hybrid vehicle including the device, which are used to control the cooling of the HSG according to the idle charging condition of the HSG. Background Art

[0004] Generally, a hybrid electric vehicle (HEV) is a vehicle that utilizes two power sources, most often an engine and an electric motor.

[0005] HEVs have excellent fuel efficiency and engine performance compared to vehicles including only an internal combustion engine, and are also advantageous in reducing exhaust gas, and thus HEVs have recently been actively developed.

[0006] Hybrid vehicles are driven in two modes depending on which powertrain is used to drive the vehicle.

[0007] One of the modes is an electric vehicle (EV) mode in which the vehicle travels using only the motor, and the other mode is a hybrid electric vehicle (HEV) mode in which both the motor and the engine are operated to obtain power.

[0008] Hybrid vehicles can be divided into various types of vehicles depending on how the engine, motor, transmission and clutch are combined.

[0009] Among them, a hybrid vehicle using a transmission mounted electric device (TMED) system using an engine, two motors and a clutch is configured in such a way that the main power motor is combined with the transmission to be partially or fully responsible for providing power when driving in HEV / EV mode, and during the transition between HEV and EV modes, when the engine is started and shut down or in an idling state, the auxiliary power motor and engine are combined to charge the high-voltage battery using the forced-driven engine.

[0010] Here, a hybrid starter and generator (HSG) as an auxiliary power motor generates a large amount of heat during driving and regeneration operations of a hybrid vehicle, and in order to cool the HSG, a flow channel is formed together with an inverter and an electric water pump (EWP) and a coolant are used to control the temperature of the HSG.

[0011] However, the HSG allows current to flow in a coil to form an electromagnet and utilizes a magnetic repulsion force based on the electromagnet, and in this process, heat is generated from the coil and the coil is susceptible to thermal damage, thereby shortening its service life.

[0012] Such thermal damage to the coil includes damage to the impregnation and coating materials due to exposure to high temperatures, as well as damage caused by cracks in the coil surface and dielectric breakdown of the coil due to repeated temperature changes between high and low temperatures.

[0013] Therefore, in the future, it is necessary to develop an HSG cooling control device for hybrid vehicles to overcome the problem that the temperature change of the HSG is repeatedly generated, thereby shortening the service life. Summary of the invention

[0014] Accordingly, the present invention is directed to providing a hybrid starter and generator (HSG) cooling control device for a hybrid vehicle, an HSG cooling control method, and a hybrid vehicle including the HSG cooling control device that substantially eliminates one or more problems caused by limitations and disadvantages of the prior art.

[0015] An object of the present invention is to provide an HSG cooling control device and an HSG cooling control method for a hybrid vehicle, and a hybrid vehicle including the HSG cooling control device: which are used to differently determine the idle charging mode and the driving mode of the HSG, and perform cooling control corresponding to the idle charging mode or cooling control corresponding to the driving mode, thereby extending the service life of the HSG.

[0016] Other advantages, objectives and features of the present invention will be partially presented in the following description, and for those skilled in the art, these parts will become obvious after verification, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the written description and claims and the drawings.

[0017] To achieve these objects and other advantages, and in accordance with the purposes of the present invention as embodied and broadly described herein, a hybrid starter and generator (HSG) cooling control device for a hybrid vehicle includes: a receiver configured to receive driving information of an engine and driving information of an HSG; a cooling unit configured to cool the HSG; and a controller configured to control the cooling unit; wherein the controller determines whether the HSG is in an idle charging mode based on the driving information of the engine and the driving information of the HSG; when the HSG is in the idle charging mode, the controller determines whether the temperature of the HSG is higher than a first cooling requirement temperature; and when the temperature of the HSG is higher than the first cooling requirement temperature, the controller controls the cooling unit to start.

[0018] When determining whether the hybrid starter generator is in idle charging mode, when determining that the HSG is not in idle charging mode, the controller can check whether the temperature of the HSG is higher than the second cooling requirement temperature. When the temperature of the HSG is higher than the second cooling requirement temperature, the controller can control the cooling unit to start.

[0019] When checking whether the temperature of the HSG is higher than a second cooling required temperature, the controller may control the cooling unit to be turned off when the temperature of the HSG (Hybrid Starter Generator) is not higher than the second cooling required temperature.

[0020] When determining whether the temperature of the HSG is higher than the first cooling requirement temperature, the controller may control the cooling unit to be turned off when determining that the temperature of the HSG is not higher than the first cooling requirement temperature.

[0021] In another aspect of the present invention, a hybrid starter generator cooling control method for a hybrid vehicle including a receiver and a controller for controlling the driving of a cooling unit includes: receiving driving information of an engine and driving information of an HSG through a receiver; determining whether the HSG is in an idle charging mode based on the driving information of the engine and the driving information of the HSG through a controller; when the HSG is in the idle charging mode, determining whether the temperature of the HSG is higher than a first cooling requirement temperature through the controller; and when the temperature of the HSG is higher than the first cooling requirement temperature, controlling the cooling unit to start through the controller.

[0022] Determining whether the HSG is in the idle charging mode may include checking whether the temperature of the HSG is higher than a second cooling requirement temperature when the HSG is not in the idle charging mode, and controlling the cooling unit to start when the temperature of the HSG is higher than the second cooling requirement temperature.

[0023] Checking whether the temperature of the HSG is higher than the second cooling requirement temperature may include controlling the cooling unit to be turned off when the temperature of the HSG is not higher than the second cooling requirement temperature.

[0024] Checking whether the temperature of the HSG is higher than the first cooling requirement temperature may include controlling the cooling unit to be turned off when the temperature of the HSG is not higher than the first cooling requirement temperature.

[0025] In another aspect of the present invention, a computer readable recording medium has recorded thereon a program for executing an HSG cooling control method of a hybrid vehicle.

[0026] In another aspect of the present invention, a hybrid vehicle including an HSG cooling control device includes: a hybrid power source including a motor, an engine and a hybrid starter generator (HSG); and an HSG cooling control device for controlling the cooling of the HSG; wherein the HSG cooling control device includes: a receiver configured to receive driving information of the engine and driving information of the HSG; a cooling unit configured to cool the HSG; a controller configured to determine whether the HSG is in an idle charging mode based on the driving information of the engine and the driving information of the HSG, determine whether the temperature of the HSG is higher than a first cooling requirement temperature when the HSG is in the idle charging mode, and control the cooling unit to start when the temperature of the HSG is higher than the first cooling requirement temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

[0028] Figure 1 A schematic diagram for explaining a transmission mounted electric device (TMED) system of a hybrid vehicle including a hybrid starter and generator (HSG) cooling control device according to an exemplary embodiment of the present invention;

[0029] Figure 2 is a block diagram for explaining an HSG cooling control apparatus of a hybrid vehicle according to an exemplary embodiment of the present invention;

[0030] Figure 3 A graph showing a reduction in temperature variation of the HSG accompanying application of the HSG cooling control device according to the present invention in an idle charging mode;

[0031] Figure 4is a flowchart for explaining an HSG cooling control method of an HSG cooling control device of a hybrid vehicle according to an exemplary embodiment of the present invention; and

[0032] Figure 5 2 is a schematic diagram for explaining a hybrid vehicle including an output torque control apparatus according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0033] The exemplary embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention with reference to the accompanying drawings. However, the present invention can be implemented in various different forms and is not limited to these embodiments. In order to clearly describe the present invention, parts not related to the embodiments are omitted in the accompanying drawings, and the same reference numerals in the specification represent the same elements.

[0034] Throughout the specification, those of ordinary skill in the art will understand that the terms "include", "comprises", and "have" are interpreted as inclusive or open by default, and are not interpreted as exclusive or closed, unless otherwise explicitly defined. In addition, terms such as "unit", "module", etc. disclosed in the specification are intended to be units for processing at least one function or operation, which can be implemented by hardware, software, or a combination thereof.

[0035] Throughout the specification, when a part "includes" a component, it means that the part may further include another component rather than excluding the other component, unless there is no different disclosure. The same reference numerals will be used to denote the same parts throughout the drawings.

[0036] In the following, reference will be made to Figures 1 to 5 A hybrid starter generator (HSG) cooling control device of a hybrid vehicle, an HSG cooling control method thereof, and a hybrid vehicle including the HSG cooling control device according to an embodiment of the present invention are described in detail.

[0037] Figure 1 1 is a schematic diagram for explaining a transmission mounted electric device (TMED) system of a hybrid vehicle including an HSG cooling control apparatus according to an exemplary embodiment of the present invention.

[0038] like Figure 1 As shown, a hybrid vehicle according to the present invention may include a hybrid power source including a motor 40 , an engine 20 , and a hybrid starter generator (HSG) 30 ; and a HSG cooling control device 10 for controlling cooling of the HSG 30 .

[0039] A hybrid vehicle may include a powertrain that includes a hybrid power source.

[0040] Here, the powertrain may adopt a parallel type hybrid system, in which the motor 40 and the engine clutch 50 are installed between the engine 20 (generally an internal combustion engine) and the transmission 60 .

[0041] Typically, in a hybrid vehicle, when the driver depresses the accelerator pedal after the vehicle is started, the motor 40 is driven by the power of the battery with the engine clutch 50 disconnected, and then the power of the motor 40 is transmitted to the transmission 60 and the final drive (FD) 70 to move the wheels (i.e., EV mode).

[0042] The HSG 30 may be operated to start the engine 20 when a gradually increasing driving force is required as the hybrid vehicle gradually accelerates.

[0043] Therefore, when the engine 20 and the motor 40 have the same rotation speed, the engine clutch 50 is finally engaged, and the engine 20 and the motor 40 drive the vehicle together (ie, switch from the EV mode to the HEV mode).

[0044] Then, when a preset engine shutoff condition is satisfied (eg, a condition that the hybrid vehicle is decelerating), the engine clutch 50 may be disengaged and the engine 20 may be stopped (ie, converted from the HEV mode to the EV mode).

[0045] In this case, the hybrid vehicle can charge the battery through the motor 40 using the driving force of the wheels, which is called brake energy regeneration or regenerative braking.

[0046] Therefore, the HSG 30 may be used as a starter motor when the engine 20 is started, and may be used as a generator after the vehicle is started or when the engine 20 is turned off and the rotational energy of the engine 20 is recovered.

[0047] Here, the HSG 30 may generate a large amount of heat during the driving and regeneration process of the hybrid vehicle, and in order to cool the HSG 30 , a flow passage is constructed together with an inverter and the temperature of the HSG 30 is controlled using an electric water pump (EWP) and a coolant.

[0048] Performance characteristics of the HSG 30 may include intermittent charging and discharging performed in a normal driving mode, and mandatory battery charging performed in an idle charging mode.

[0049] Here, in the normal driving mode, the HSG 30 may have a limited torque sustaining time due to intermittent torque application accompanying the transition between the HEV mode and the EV mode, and thus, may not require active cooling due to slight heating.

[0050] On the other hand, in the idle charge mode, the torque in the regeneration direction is maintained for a predetermined time, and therefore, the HSG 30 generates more heat, and active cooling of the HSG 30 is required.

[0051] As such, the HSG 30 has different thermal heating characteristics in the normal driving mode and the idle charging mode, and thus, when cooling control of the HSG 30 is performed without considering the thermal heating characteristics of each mode, the service life of the HSG 30 may be reduced.

[0052] That is, in the idle charging mode of the HSG 30 , when the possibility of the temperature increase of the HSG 30 cannot be determined in advance, the HSG 30 may experience a continuous change in temperature, and the HSG 30 may be affected by a dielectric breakdown condition due to a decrease in durability.

[0053] According to the present invention, the HSG cooling control device 10 may be arranged to effectively control cooling of the HSG 30 in consideration of the thermal heating characteristics of the idle charging mode of the HSG 30 and the thermal heating characteristics of the driving mode of the HSG 30 .

[0054] The HSG cooling control device 10 according to the present invention may include: a receiver 100 , a cooling unit 200 and a controller 300 ; the receiver 100 is used to receive driving information of the engine 20 and driving information of the HSG 30 ; the cooling unit 200 is used to cool the HSG 30 ; and the controller 300 is used to control the driving of the cooling unit 200 .

[0055] The controller 300 may be a processor (eg, a computer, a microprocessor, a CPU, an ASIC, a circuit system, a logic circuit, etc.) that executes software instructions, and various functions described below may be implemented through the processor.

[0056] Here, the controller 300 can determine whether the HSG 30 is in the idle charging mode based on the driving information of the engine 20 and the driving information of the HSG 30. When the HSG 30 is in the idle charging mode, the controller 300 can determine whether the temperature of the HSG 30 is higher than the first cooling requirement temperature, and when the temperature of the HSG 30 is higher than the first cooling requirement temperature, the controller 300 can control the cooling unit 200 to start.

[0057] When the controller 300 determines whether the HSG 30 is in the idle charging mode, if the HSG 30 is not in the idle charging mode, the controller 300 may check whether the temperature of the HSG 30 is higher than the second cooling requirement temperature, and when the temperature of the HSG 30 is higher than the second cooling requirement temperature, the controller 300 may control the cooling unit 200 to start.

[0058] In addition, when the controller 300 checks whether the temperature of the HSG 30 is higher than the second cooling requirement temperature, if the temperature of the HSG 30 is not higher than the second cooling requirement temperature, the controller 300 may control the cooling unit 200 to be turned off.

[0059] Then, when the controller 300 determines whether the temperature of the HSG 30 is higher than the first cooling requirement temperature, if the temperature of the HSG 30 is not higher than the first cooling requirement temperature, the controller 300 may control the cooling unit 200 to be turned off.

[0060] Here, the second cooling requirement temperature may be higher than the first cooling requirement temperature.

[0061] That is, the first cooling requirement temperature may be a cooling requirement temperature required when the HSG 30 is in the idle charging mode, and the second cooling requirement temperature may be a cooling requirement temperature required when the HSG 30 is in the driving mode.

[0062] In this way, according to the present invention, the cooling control of the HSG can be divided into a normal driving mode and an idle charging mode. When the normal driving mode is executed, unnecessary driving energy of the electric water pump (EWP) can be reduced, and when the idle charging mode is executed, the temperature of the HSG can be prevented from rising, thereby extending the service life of the HSG.

[0063] That is, according to the present invention, the service life of the HSG can be increased simply by changing the logic without additionally changing the hardware.

[0064] Figure 2 is a block diagram for explaining an HSG cooling control apparatus of a hybrid vehicle according to an exemplary embodiment of the present invention.

[0065] like Figure 2 As shown, the HSG cooling control device according to the present invention may include: a receiver 100, a cooling unit 200 and a controller 300; the receiver 100 is used to receive the driving information of the engine and the driving information of the HSG; the cooling unit 200 is used to cool the HSG; and the controller 300 is used to control the driving of the cooling unit.

[0066] Here, the receiver 100 may receive engine driving information 110 including at least one of an engine clutch driving signal 112 and engine revolutions per minute (RPM) information 114 , and HSG driving information 120 including at least one of HSG torque information 122 and HSG temperature 124 .

[0067] The receiver 100 may be a hardware device implemented by various electronic circuits (eg, a processor) to receive a signal via a wireless connection or a wired connection.

[0068] The cooling unit 200 may include an electric water pump (EWP), but is not limited thereto.

[0069] In addition, the controller 300 may include: a first determination module 310, a storage device 320, a second determination module 330 and a drive controller 340; the first determination module 310 is used to determine the idle charging mode of the HSG; the storage device 320 is used to preset and store the first cooling requirement temperature; the second determination module 330 is used to compare the first cooling requirement temperature with the temperature of the HSG to determine whether the HSG needs cooling; the drive controller 340 is used to control the drive of the cooling unit 200 according to the determination of the second determination module 330.

[0070] Here, the storage device 320 may further store a preset second cooling requirement temperature.

[0071] In this case, the second cooling requirement temperature may be higher than the first cooling requirement temperature.

[0072] For example, the first cooling requirement temperature may be a cooling requirement temperature corresponding to an idle charging mode of the HSG, and the second cooling requirement temperature may be a cooling requirement temperature corresponding to a driving mode of the HSG.

[0073] The controller 300 configured as described above can determine whether the HSG is in the idle charging mode based on the engine driving information 110 and the HSG driving information 120. When the HSG is in the idle charging mode, the controller 300 can determine whether the temperature of the HSG is higher than the first cooling requirement temperature, and when the temperature of the HSG is higher than the first cooling requirement temperature, the controller 300 can control the cooling unit 200 to start.

[0074] Here, after driving the engine, the controller 300 may determine whether the HSG is in an idle charging mode.

[0075] When determining whether the HSG is in idle charging mode, the controller 300 can check whether there is an engine clutch drive signal 112 in the engine drive information 110. When the engine clutch drive signal 112 exists, the controller 300 can check whether the engine clutch is in a disabled state based on the engine clutch drive signal 112. When the engine clutch is in a disabled state, the controller 300 can determine that the HSG is in idle charging mode.

[0076] As needed, when determining whether the HSG is in idle charging mode, the controller 300 can check whether there is engine RPM information 114 in the engine driving information 110. When the engine RPM information 114 exists, the controller 300 can check whether the engine RPM is 0 based on the engine RPM information 114. When the engine RPM is not 0, the controller 300 can determine that the HSG is in idle charging mode.

[0077] In another case, when it is determined that the HSG is in the idle charging mode, the controller 300 may check whether the HSG torque information 122 exists in the HSG driving information 120, and when the HSG torque information 122 exists in the HSG driving information 120, the controller 300 may check whether the regenerative torque is applied to the HSG based on the HSG torque information 122, and when the regenerative torque is applied to the HSG, the controller 300 may determine that the HSG is in the idle charging mode.

[0078] For example, when determining whether the HSG is in the idle charging mode, the controller 300 can check whether at least one of the first condition, the second condition and the third condition is met based on the engine driving information and the HSG driving information. When at least one of the first condition, the second condition and the third condition is met, the controller 300 can determine that the HSG is in the idle charging mode, wherein the first condition is that the engine clutch is in the deactivated state, the second condition is that the engine RPM is not 0, and the third condition is that regenerative torque is applied to the HSG.

[0079] Here, when checking whether the first condition that the engine clutch is in a disabled state is met, the controller 300 may check whether there is an engine clutch drive signal in the engine drive information, and when there is an engine clutch drive signal, the controller 300 may check whether the engine clutch is in a disabled state based on the engine clutch drive signal, and when the engine clutch is in a disabled state, the controller 300 may check whether the first condition that the engine clutch is in a disabled state is met.

[0080] When checking whether the second condition that the engine RPM is not 0 is satisfied, the controller 300 may check whether there is engine RPM information in the engine driving information. When there is engine RPM information therein, the controller 300 may check whether the engine RPM is 0 based on the engine RPM information. When the engine RPM is not 0, the second condition that the engine RPM is not 0 may be satisfied.

[0081] Then, when checking whether the third condition for regenerative torque to be applied to HSG is satisfied, the controller 300 may check whether HSG torque information exists in the HSG driving information, and when HSG torque information exists therein, the controller 300 may check whether regenerative torque is applied to HSG based on the HSG torque information, and when regenerative torque is applied to HSG, the controller 300 may check whether the third condition for regenerative torque to be applied to HSG is satisfied.

[0082] In another example, when determining whether the HSG is in the idle charging mode, the controller 300 can check whether all of the first condition, the second condition, and the third condition are met based on the engine driving information and the HSG driving information. When all of the first condition, the second condition, and the third condition are met, the controller 300 can determine that the HSG is in the idle charging mode, the first condition being that the engine clutch is in the deactivated state, the second condition being that the engine RPM is not 0, and the third condition being that regenerative torque is applied to the HSG.

[0083] When the controller 300 determines whether the HSG is in the idle charging mode, if the HSG is not in the idle charging mode, the controller 300 can check whether the temperature of the HSG is higher than the second cooling requirement temperature. When the temperature of the HSG is higher than the second cooling requirement temperature, the controller 300 can control the cooling unit 200 to start.

[0084] Here, the second cooling requirement temperature may be higher than the first cooling requirement temperature.

[0085] In this case, the first cooling requirement temperature may be a cooling requirement temperature required when the HSG is in an idle charging mode, and the second cooling requirement temperature may be a cooling requirement temperature required when the HSG is in a driving mode.

[0086] For example, the first cooling requirement temperature value and the second cooling requirement temperature value may be temperature setting values ​​preset and stored in the storage device 320 .

[0087] Then, when the controller 300 checks whether the temperature of the HSG is higher than the second cooling requirement temperature, if the temperature of the HSG is not higher than the second cooling requirement temperature, the controller 300 may control the cooling unit 200 to be turned off.

[0088] When determining whether the temperature of the HSG is higher than the first cooling requirement temperature, the controller 300 may check whether there is HSG temperature information in the HSG driving information, and when there is HSG temperature information therein, the controller 300 may determine whether the temperature of the HSG is higher than the first cooling requirement temperature based on the HSG temperature information.

[0089] Here, the first cooling requirement temperature may be a cooling demand temperature required when the HSG is in the idle charging mode.

[0090] Then, when the controller 300 determines whether the temperature of the HSG is higher than the first cooling requirement temperature, if the temperature of the HSG is not higher than the first cooling requirement temperature, the controller 300 may control the cooling unit 200 to be turned off.

[0091] In this way, according to the present invention, the idle charge mode and the driving mode of the HSG may be differently determined, and cooling control corresponding to the idle charge mode or cooling control corresponding to the driving mode may be performed, thereby increasing the service life of the HSG.

[0092] According to the present invention, the cooling control of the HSG can be divided into a normal driving mode and an idle charging mode. Therefore, when the normal driving mode is executed, unnecessary driving energy of the electric water pump (EWP) can be reduced, and when the idle charging mode is executed, the temperature of the HSG can be prevented from rising, thereby extending the service life of the HSG.

[0093] That is, according to the present invention, the service life of the HSG can be increased by simply changing the logic without additionally changing the hardware.

[0094] Figure 3 Graph showing reduction in temperature variation of the HSG accompanying application of the HSG cooling control device according to the present invention in the idle charging mode.

[0095] According to the present invention, Figure 3 As can be seen, the effect of preventing the temperature change of the HSG in the idle charging mode can be achieved.

[0096] In the conventional cooling method, in order to prevent high temperature derating, the cooling logic is unified and applied under high temperature conditions, and active cooling is not performed in idle charging mode, so the temperature of the HSG may increase.

[0097] On the other hand, in the cooling method according to the present invention, the continuous torque application (temperature increase) in the idle charging mode can be predetermined, and the electric water pump (EWP) can be driven in advance for cooling, so the temperature increase of the HSG can be reduced, thereby improving durability.

[0098] Figure 4It is a flowchart for explaining an HSG cooling control method of the HSG cooling control apparatus of a hybrid vehicle according to an exemplary embodiment of the present invention.

[0099] like Figure 4 As shown, when the engine is driven ( S10 ), the controller according to the present invention may receive engine driving information and HSG driving information ( S20 ).

[0100] Here, when receiving the engine driving information and the HSG driving information, the controller may receive the engine driving information HSG driving information, the engine driving information including at least one of an engine clutch driving signal and an engine RPM information, and the HSG driving information including at least one of an HSG torque and an HSG temperature.

[0101] The controller may determine whether the HSG is in an idle charging mode based on the engine driving information and the HSG driving information ( S30 ).

[0102] For example, the controller can check whether at least one of the first condition, the second condition and the third condition is met based on the engine driving information and the HSG driving information. When at least one of the first condition, the second condition and the third condition is met, the controller 300 can determine that the HSG is in idle charging mode, the first condition is that the engine clutch is in a disabled state, the second condition is that the engine RPM is not 0, and the third condition is that regenerative torque is applied to the HSG.

[0103] In another example, when determining whether the HSG is in idle charging mode, the controller can check whether all of the first condition, the second condition, and the third condition are met based on the engine driving information and the HSG driving information. When all of the first condition, the second condition, and the third condition are met, the controller can determine that the HSG is in idle charging mode, the first condition being that the engine clutch is in a deactivated state, the second condition being that the engine RPM is not 0, and the third condition being that regenerative torque is applied to the HSG.

[0104] Then, when the HSG is in the idle charging mode, the controller may receive HSG temperature information ( S40 ), and may determine whether the temperature of the HSG is higher than a first cooling requirement temperature ( S50 ).

[0105] Here, when determining whether the temperature of the HSG is higher than the first cooling requirement temperature, the controller may check whether HSG temperature information exists in the HSG driving information, and when the HSG temperature information exists therein, the controller may determine whether the temperature of the HSG is higher than the first cooling requirement temperature based on the HSG temperature information.

[0106] In this case, the first cooling requirement temperature may be a cooling requirement temperature required when the HSG is in the idle charging mode.

[0107] Then, when the temperature of the HSG is higher than the first cooling demand temperature, the controller may control the cooling unit to start (S60).

[0108] Here, when the temperature of the HSG is not higher than the first cooling requirement temperature, the controller may control the cooling unit to be turned off (S80).

[0109] When the controller determines whether the HSG is in the idle charging mode (S30), if the HSG is not in the idle charging mode, the controller 300 can check whether the temperature of the HSG is higher than the second cooling requirement temperature (S70), and when the temperature of the HSG is higher than the second cooling requirement temperature, the controller 300 can control the cooling unit 200 to start (S60).

[0110] Here, the second cooling requirement temperature may be higher than the first cooling requirement temperature.

[0111] In this case, the first cooling requirement temperature may be a cooling requirement temperature required when the HSG is in an idle charging mode, and the second cooling requirement temperature may be a cooling requirement temperature required when the HSG is in a driving mode.

[0112] For example, the first cooling requirement temperature value and the second cooling requirement temperature value may be preset and stored temperature setting values.

[0113] Then, when the controller checks whether the temperature of the HSG is higher than the second cooling requirement temperature (S70), if the temperature of the HSG is not higher than the second cooling requirement temperature, the controller may control the cooling unit to be turned off (S80).

[0114] In this way, according to the present invention, the idle charge mode and the driving mode of the HSG may be differently determined, and cooling control corresponding to the idle charge mode or cooling control corresponding to the driving mode may be performed, thereby extending the service life of the HSG.

[0115] Figure 5 2 is a schematic diagram for explaining a hybrid vehicle including an output torque control apparatus according to an exemplary embodiment of the present invention.

[0116] like Figure 5 As shown, the hybrid vehicle 1 according to the present invention may include a hybrid power source and an HSG cooling control device 10 ; the hybrid power source includes a motor, an engine 30 and an HSG (hybrid starter generator) 20 ; the HSG cooling control device 10 is used for cooling control of the HSG 20 .

[0117] Here, the HSG cooling control device may include a receiver, a cooling unit and a controller; the receiver is used to receive driving information of the engine and the HSG; the cooling unit is used to cool the HSG; the controller is used to: determine whether the HSG is in an idle charging mode based on the engine driving information and the HSG driving information; when the HSG is in the idle charging mode, determine whether the temperature of the HSG is higher than the first cooling requirement temperature; when the temperature of the HSG is higher than the first cooling requirement temperature, control the cooling unit to start.

[0118] According to the present invention, a program provided by the control method of the HSG cooling control device of a hybrid vehicle according to an exemplary embodiment of the present invention can be executed using a computer readable recording medium on which a program for executing the control method of the HSG cooling control device of a hybrid vehicle is recorded.

[0119] In the HSG cooling control device and HSG cooling control method of a hybrid vehicle according to at least one exemplary embodiment of the present invention configured as described above, and a hybrid vehicle including the HSG cooling control device, the idle charging mode and the driving mode of the HSG can be determined differently, and cooling control corresponding to the idle charging mode or cooling control corresponding to the driving mode can be performed, thereby extending the service life of the HSG.

[0120] According to the present invention, the cooling control of the HSG can be divided into a normal driving mode and an idle charging mode. When the normal driving mode is executed, unnecessary driving energy of the electric water pump (EWP) can be reduced. When the idle charging mode is executed, the temperature of the HSG can be prevented from rising, thereby extending the service life of the HSG.

[0121] That is, according to the present invention, the service life of the HSG can be increased simply by changing the logic without additionally changing the hardware.

[0122] Those skilled in the art will understand that the effects that can be achieved by the present invention are not limited to the contents that have been specifically described above, and other effects of the present invention will be more clearly understood through the above specific embodiments.

[0123] The present invention described above can also be implemented as a computer-readable code stored on a computer-readable recording medium. A computer-readable recording medium is any data storage device that can store data that can be subsequently read by a computer. Examples of computer-readable recording media include a hard disk drive (HDD), a solid state drive (SSD), a silicon disk drive (SDD), a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0124] It will be apparent to those skilled in the art that various modifications and changes may be made to the present application without departing from the spirit and scope of the present invention. Therefore, the purpose of this application is to cover modifications and changes of the present invention, provided that they are within the scope of the appended claims and their equivalents.

Claims

1. A HSG cooling control device for a hybrid vehicle, comprising: a receiver configured to receive driving information of the engine and driving information of the HSG; a cooling unit configured to cool the HSG; as well as a controller configured to control the cooling unit; wherein the controller determines whether the HSG is in an idle charging mode based on the driving information of the engine and the driving information of the HSG; when the HSG is in the idle charging mode, the controller determines whether the temperature of the HSG is higher than a first cooling requirement temperature; and when the temperature of the HSG is higher than the first cooling requirement temperature, the controller controls the cooling unit to start, The receiver receives the driving information of the engine and the driving information of the HSG, wherein the driving information of the engine includes at least one of the engine clutch driving signal or the engine revolutions per minute, and the driving information of the HSG includes the HSG torque and the temperature of the HSG. When determining whether the HSG is in the idle charging mode, when determining that the HSG is not in the idle charging mode, the controller checks whether the temperature of the HSG is higher than the second cooling requirement temperature, and when the temperature of the HSG is higher than the second cooling requirement temperature, the controller controls the cooling unit to start. The second cooling requirement temperature is higher than the first cooling requirement temperature.

2. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: The cooling unit includes an electric water pump.

3. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: After driving the engine, the controller determines whether the HSG is in an idle charging mode.

4. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: When determining whether the HSG is in an idle charging mode, the controller checks whether there is an engine clutch driving signal in the driving information of the engine; When there is an engine clutch driving signal in the driving information of the engine, the controller checks whether the engine clutch is in a deactivated state based on the engine clutch driving signal; When the engine clutch is in the deactivated state, the controller determines that the HSG is in the idle charging mode.

5. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: When determining whether the HSG is in an idle charging mode, the controller checks whether there is engine revolutions per minute information in the engine driving information; When there is engine revolutions per minute information in the driving information of the engine, the controller checks whether the engine revolutions per minute information is not 0 based on the engine revolutions per minute information; When the engine rpm is not 0, the controller determines that the HSG is in the idle charging mode.

6. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: When determining whether the HSG is in an idle charging mode, the controller checks whether there is HSG torque information in the driving information of the HSG; When HSG torque information exists in the driving information of the HSG, the controller checks whether the regeneration torque is applied to the HSG based on the HSG torque information; When the regenerative torque is applied to the HSG, the controller determines that the HSG is in the idle charging mode.

7. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: When determining whether the HSG is in the idle charging mode, the controller checks whether at least one of the first condition, the second condition and the third condition is met based on the driving information of the engine and the driving information of the HSG. When at least one of the first condition, the second condition and the third condition is met, the controller is able to determine that the HSG is in the idle charging mode, the first condition being that the engine clutch is in the disabled state, the second condition being that the engine revolutions per minute are not 0, and the third condition being that regenerative torque is applied to the HSG.

8. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: When determining whether the HSG is in the idle charging mode, the controller checks whether all of the first condition, the second condition and the third condition are met based on the driving information of the engine and the driving information of the HSG, and when all of the first condition, the second condition and the third condition are met, the controller determines that the HSG is in the idle charging mode, the first condition is that the engine clutch is in the deactivated state, the second condition is that the engine revolutions per minute are not 0, and the third condition is that regenerative torque is applied to the HSG.

9. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: When determining whether the temperature of the HSG is higher than the first cooling requirement temperature, the controller checks whether there is HSG temperature information in the driving information of the HSG; When HSG temperature information exists in the driving information of the HSG, the controller determines whether the temperature of the HSG is higher than a first cooling requirement temperature based on the HSG temperature information.

10. The HSG cooling control device for a hybrid vehicle according to claim 1, wherein: In determining whether the temperature of the HSG is higher than a first cooling requirement temperature, the controller controls the cooling unit to be turned off when it is determined that the temperature of the HSG is not higher than the first cooling requirement temperature.

11. A method for controlling HSG cooling of a hybrid vehicle, the hybrid vehicle comprising a receiver and a controller for controlling driving of a cooling unit, the method comprising the following steps: receiving the driving information of the engine and the driving information of the HSG through the receiver; determining, by the controller, whether the HSG is in an idle charging mode based on the driving information of the engine and the driving information of the HSG; When the HSG is in an idle charging mode, determining, by a controller, whether a temperature of the HSG is higher than a first cooling requirement temperature; When the temperature of the HSG is higher than the first cooling requirement temperature, the cooling unit is started by controlling the controller; The step of receiving the driving information of the engine and the driving information of the HSG includes: receiving the driving information of the engine and the driving information of the HSG, wherein the driving information of the engine includes at least one of an engine clutch driving signal or an engine revolution per minute, and the driving information of the HSG includes an HSG torque and a temperature of the HSG, The step of determining whether the HSG is in the idle charging mode includes: When the HSG is not in the idle charging mode, checking whether the temperature of the HSG is higher than the second cooling requirement temperature; When the temperature of the HSG is higher than the second cooling requirement temperature, the cooling unit is controlled to start. The second cooling requirement temperature is higher than the first cooling requirement temperature.

12. The HSG cooling control method for a hybrid vehicle according to claim 11, wherein: The steps to determine if the HSG is in idle charging mode include: Check whether there is an engine clutch driving signal in the engine driving information; When there is an engine clutch driving signal in the driving information of the engine, checking whether the engine clutch is in a deactivated state based on the engine clutch driving signal; When the engine clutch is in the deactivated state, it is determined that the HSG is in the idle charging mode.

13. The HSG cooling control method for a hybrid vehicle according to claim 11, wherein: The steps to determine if the HSG is in idle charging mode include: Check whether there is engine rpm information in the engine driving information; When there is engine revolutions per minute information in the engine driving information, checking whether the engine revolutions per minute information is not 0 based on the engine revolutions per minute information; When the engine rpm is not 0, it is determined that the HSG is in the idle charging mode.

14. The HSG cooling control method for a hybrid vehicle according to claim 11, wherein: The steps to determine if the HSG is in idle charging mode include: Check whether there is HSG torque information in the HSG drive information; When HSG torque information exists in the driving information of the HSG, checking whether the regenerative torque is applied to the HSG based on the HSG torque information; When the regenerative torque is applied to the HSG, it is determined that the HSG is in the idle charging mode.

15. The HSG cooling control method for a hybrid vehicle according to claim 11, wherein: The step of determining whether the temperature of the HSG is higher than the first cooling requirement temperature includes: checking whether there is HSG temperature information in the driving information of the HSG; when there is HSG temperature information in the driving information of the HSG, determining whether the temperature of the HSG is higher than the first cooling requirement temperature based on the HSG temperature information.

16. The HSG cooling control method for a hybrid vehicle according to claim 11, wherein: The step of determining whether the temperature of the HSG is higher than the first cooling requirement temperature includes controlling the cooling unit to be turned off when the temperature of the HSG is not higher than the first cooling requirement temperature.

Images