Hybrid system for vehicle provided with plurality of engine power generation modules

Abstract

To provide a hybrid system for a vehicle provided with a plurality of engine power generation modules, in which each of the plurality of the engines of the engine power generation modules are configured to be driven sequentially so that each of the plurality of engines is operated in a section with an optimal efficiency to match a required output of the vehicle.SOLUTION: A hybrid system for a vehicle provided with a plurality of engine power generation modules according to the present invention, includes: a plurality of engine power generation modules 10A, 10B, 10C for generating power with an operation of each engine; a battery 40 for storing power output from the engine power generation modules 10A, 10B, 10C; a plurality of driving modules 30A, 30B to drive driving wheels of the vehicle by the power output from the engine power generation modules 10A, 10B, 10C or the battery 40; and a control unit 50 for selectively controlling operations of the engine power generation modules 10A, 10B, 10C and the driving modules 30A, 30B to match a required output of the vehicle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hybrid system that uses an engine and a drive motor as a driving source, and more particularly, to a hybrid system for a vehicle equipped with a plurality of engine-powered generating modules, in which each engine is preferentially operated in a section where it is most efficient to drive the vehicle. [Background technology]

[0002] Among vehicle drive systems, a hybrid system drives the vehicle by operating either one or both of an engine that burns fuel and a drive motor that runs on power applied from a battery.

[0003] Depending on the running speed, the slope angle, the presence or absence of acceleration, etc., either one or both of the engine and the drive motor are operated.

[0004] Meanwhile, in large commercial vehicles, a hybrid system is constructed by combining a large-displacement engine, a drive motor, a transmission, etc. The engine and the drive motor are operated according to the driving conditions of the vehicle, but the engine has to operate according to a preset logic even in sections where the engine efficiency is low. Immediately after the engine is started or when the vehicle is driven at high speed, the thermal efficiency of the engine tends to decrease rapidly.

[0005] However, there is a problem in that the engine must unavoidably operate in a section where efficiency is low and fuel consumption is high according to a predetermined logic. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been invented to solve the above problems, and has an object to provide a hybrid system for a vehicle equipped with a plurality of engine-power generation modules, in which a plurality of engine-power generation modules including small-displacement engines are provided, and the engines of the engine-power generation modules are driven in sequence so that the engines are operated in a section with optimal efficiency according to the required output of the vehicle. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objectives, the hybrid system of the present invention for a vehicle equipped with multiple engine generating modules includes multiple engine generating modules that generate electricity by operating an engine, a battery that stores the electricity output from the multiple engine generating modules, multiple drive modules that drive the vehicle's drive wheels using electricity input from the multiple engine generating modules or the battery, and a control unit that controls the operation of the multiple engine generating modules and the multiple drive modules in accordance with the vehicle's required output.

[0008] The multiple engine power generation modules are characterized by including the engine, a generator driven by the engine to generate electricity, and a converter that converts the electricity output from the generator and outputs it to the battery or the multiple drive modules.

[0009] The control unit is characterized in that it derives an overall engine efficiency map from the individual engine efficiency maps of each of the engines provided in each of the engine power generation modules, and drives the multiple engine power generation modules according to the overall engine efficiency map in accordance with the required output of the vehicle.

[0010] The control unit is characterized in that it derives the overall engine efficiency map by connecting each of the individual engine efficiency maps such that optimal efficiency sections in which the fuel consumption rate is equal to or less than a predetermined standard are connected to each other.

[0011] The control unit determines an operation order for the plurality of engine power generation modules, and derives an overall engine efficiency map so that a portion of the individual engine efficiency map of the engine of the engine power generation module that operates first is connected to an optimal efficiency section of the individual engine efficiency map of the engine of the engine power generation module that operates next at a portion where the fuel consumption rate increases in the individual engine efficiency map of the engine of the engine power generation module that operates first.

[0012] The control unit is characterized in that when the required output of the vehicle increases at a point in the individual engine efficiency map of the engine of the engine power generation module where the fuel consumption rate increases, the control unit operates the next engine power generation module while maintaining the engine output of the engine of the engine power generation module that is currently operating.

[0013] The control unit is characterized in that when an input indicating that the required output of the vehicle is increasing is input at a point in the individual engine efficiency map of the engine of the engine power generation module that is activated last where the fuel consumption rate is inflected to increase, the control unit increases the output of all of the engine power generation modules and operates them.

[0014] The control unit is characterized in that it varies the operation sequence of the plurality of engine power generation modules.

[0015] The engines provided in the multiple engine power generation modules are configured with different displacements, and the control unit selectively operates the multiple engine power generation modules in accordance with the required output of the vehicle.

[0016] The engines provided in the multiple engine power generation modules are configured with the same displacement, and the control unit selectively operates the multiple engine power generation modules in accordance with the required output of the vehicle.

[0017] The engines provided in the multiple engine power generation modules are configured so that the engine displacements of some of the engine power generation modules are the same and the engine displacements of the remaining engine power generation modules are different, and the control unit selectively operates the multiple engine power generation modules in accordance with the required output of the vehicle.

[0018] The drive module includes an inverter that converts direct current to alternating current, a drive motor that generates driving force, and a reducer that is connected to an output shaft of the drive motor and reduces the rotation speed of the output shaft. Effect of the Invention

[0019] According to the vehicle hybrid system of the present invention having multiple engine power generation modules configured as described above, the engine power generation modules are constructed using engines with small displacement, and by having multiple of these, the engine power generation modules can be selectively operated in accordance with the vehicle's required output.

[0020] Furthermore, when two or more engine power generation modules are in operation, the engines can be operated mainly in the sections where the engines are highly efficient by operating each engine power generation module under operating conditions that allow the engines to perform at their optimum efficiency.

[0021] In addition, since the engines are operated alternately, durability can be improved.

[0022] In addition, by providing different displacements for the engines constituting the multiple engine power generation modules, it is possible to actively respond to various required outputs. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a block diagram showing a hybrid system for a vehicle equipped with a plurality of engine power generating modules according to the present invention. [Diagram 2] FIG. 2 is a block diagram showing an engine power generating module in a vehicle hybrid system provided with a plurality of engine power generating modules according to the present invention. [Diagram 3] FIG. 3 is a block diagram showing a drive module in a vehicle hybrid system equipped with a plurality of engine power generating modules according to the present invention. [Figure 4] FIG. 4 is a graph showing the output and fuel consumption rate according to the engine speed and torque. [Diagram 5] FIG. 5 is a graph showing the relationship between the output and fuel consumption rate of each engine in the engine power generation module. [Figure 6] FIG. 6 is a graph showing an example of power generation efficiency according to engine rotation speed and output in an engine power generation module in a vehicle hybrid system equipped with a plurality of engine power generation modules according to the present invention. [Figure 7] FIG. 7 is a graph showing the relationship between the output and fuel consumption rate of a hybrid system of a vehicle equipped with multiple engine power generation modules according to the present invention, the relationship being derived from the output and fuel consumption rate of each individual engine power generation module. [Figure 8] FIG. 8 is a graph showing the relationship between output and fuel consumption rate in a hybrid system of a vehicle equipped with a plurality of engine power generation modules according to the present invention. [Figure 9] FIG. 9 is a graph showing the relationship between output and fuel consumption rate when engine power generation modules are replaced in a vehicle hybrid system equipped with a plurality of engine power generation modules according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle hybrid system equipped with a plurality of engine power generation modules according to the present invention will be described in detail with reference to the accompanying drawings.

[0025] The hybrid system of a vehicle equipped with multiple engine-generator modules of the present invention includes multiple engine-generator modules 10A, 10B, 10C that generate electricity by operating an engine 11, a battery 40 that stores electricity output from the engine-generator modules 10A, 10B, 10C, multiple drive modules 30A, 30B that drive the vehicle's drive wheels using electricity input from the engine-generator modules 10A, 10B, 10C or the battery 40, and a control unit 50 that controls the operation of the engine-generator modules 10A, 10B, 10C and the drive modules 30A, 30B in accordance with the vehicle's required output.

[0026] The engine power generation modules 10A, 10B, and 10C generate electricity when the engine 11 is operated.

[0027] A plurality of engine power generation modules 10A, 10B, and 10C are provided to generate a driving force required for driving the vehicle. In the present invention, three engine power generation modules 10A, 10B, and 10C are provided, and an example is shown in which the engine power generation modules are configured as the first engine power generation module 10A to the third engine power generation module 10C, but a smaller or larger number of modules may be provided depending on the maximum required output of the vehicle. Furthermore, even if the maximum required output of the vehicle is the same, the number of modules may be different.

[0028] In the present invention, the vehicle may be a commercial vehicle such as a truck. The commercial vehicle has a heavy weight and runs with a heavy load. Therefore, a large displacement diesel engine has been used as a driving source for the commercial vehicle in the past.

[0029] However, in the present invention, a plurality of engine power generation modules 10A, 10B, 10C including a small displacement engine 11 are provided, and the engine power generation modules 10A, 10B, 10C are selectively operated according to the required output of the vehicle to allow the vehicle to run.

[0030] Each of the engine power generation modules 10A, 10B, and 10C includes an engine 11, a generator 12 driven by the engine 11 to generate electricity, and a converter 13 that converts the electric power output from the generator 12 and outputs the converted electric power to the battery 40 or the drive modules 30A and 30B. Here, when the engine 11 starts, the generator 12 and the converter 13 are operated by a starter motor and an inverter 31, respectively.

[0031] FIG. 2 shows the first engine power generation module 10A, but the remaining engine power generation modules 10B and 10C are also provided with the engine 11, the generator 12 and the converter 13.

[0032] The engine 11 may be an internal combustion engine that generates driving force by burning fuel. Examples of the engine 11 may include a normal gasoline engine, a diesel engine, an LPG (Liquefied Petroleum Gas) engine, a CNG (Compressed Natural Gas) engine, etc. Also, the engine 11 may be a hydrogen engine, an ammonia engine, etc. that do not emit carbon dioxide during operation.

[0033] Meanwhile, the engine power generation modules 10A, 10B, and 10C may be applied with various types of internal combustion engines as described above, and engines using different fuels may be applied to the engine power generation modules 10A, 10B, and 10C. However, it is preferable that the engines 11 using the same fuel are applied to the engine power generation modules 10A, 10B, and 10C. When engines using different fuels are applied to the engine power generation modules 10A, 10B, and 10C, the fuel supply system for supplying fuel to each engine 11 can be unified.

[0034] Even if the engine power generation modules 10A, 10B, and 10C use the same fuel, the displacement of the engine 11 applied to each of the engine power generation modules 10A, 10B, and 10C can be different, and the plurality of engine power generation modules 10A, 10B, and 10C can be selectively operated according to the required output of the vehicle by the control unit 50. For example, even if the engine power generation modules 10A, 10B, and 10C are provided as a first engine power generation module 10A, a second engine power generation module 10B, and a third engine power generation module 10C, and a gasoline engine is applied to each of the engine power generation modules 10A, 10B, and 10C, the first engine power generation module 10A and the second engine power generation module 10B can be applied as a 2.5L turbo engine, and the third engine power generation module 10C can be applied as a 1.6L turbo engine.

[0035] Of course, the engines 11 provided in the multiple engine power generation modules 10A, 10B, and 10C are configured with the same displacement, and the control unit 50 can selectively operate the multiple engine power generation modules 10A, 10B, and 10C according to the required output of the vehicle.

[0036] In addition, the multiple engine power generation modules 10A, 10B, 10C can be selectively operated by configuring the engine displacement of some of the engine power generation modules 10B, 10C to be the same and the engine displacement of the remaining engine power generation module 10A to be different.

[0037] An example of a combination of a plurality of the engine power generation modules is as follows.

[0038] Two engine power generation modules are applied, and the first engine power generation module 10A and the second engine power generation module 10B can be configured and operated with the same displacement. For example, the first engine power generation module 10A and the second engine power generation module 10B can be configured to have a displacement of 2L having the same output, and the control unit 50 can selectively operate the first engine power generation module 10A and the second engine power generation module 10B according to the required output of the vehicle.

[0039] Alternatively, two engine power generation modules may be used, with the first engine power generation module 10A having a displacement of 3 L and the second engine power generation module 10B having a displacement of 1 L. The control unit 50 may operate the first engine power generation module 10A as the main module and additionally operate the second engine power generation module 10B in a section where the maximum output of the vehicle is required, or may operate the second engine power generation module 10B as the main module in a low output section, such as a constant speed section on flat ground, and operate the first engine power generation module 10A when additional output is required.

[0040] On the other hand, the engine power generation modules may be three in number, with the first engine power generation module 10A employing an engine having a displacement of 2L, and the second engine power generation module 10B and the third engine power generation module 10C employing engines having a displacement of 1L, and depending on the required output of the vehicle, only one of the first engine power generation module 10A to the third engine power generation module 10C may be operated, or two or all of the engine power generation modules may be controlled to operate.

[0041] The number of the engine power generation modules 10A, 10B, 10C and the engine displacement applied to each of the engine power generation modules 10A, 10B, 10C can be variously applied, and the control unit 50 determines and operates the number or order of operation of the engine power generation modules 10A, 10B, 10C according to the required output of the vehicle.

[0042] Each of the engine power generation modules 10A, 10B, and 10C includes the engine 11 and the generator 12. Therefore, when the engine power generation modules 10A, 10B, and 10C are operating, the engine 11 operates the generator 12, and electricity is output, and the amount of electricity generated is determined by the rotational speed and output torque of the engine 11.

[0043] A fuel tank 20 for storing fuel to be supplied to the engine 11 may be provided on one side of the vehicle. The fuel tank 20 can supply fuel to all of the first engine power generation module 10A to the third engine power generation module 10C.

[0044] The battery 40 stores the electric power output from the engine power generation modules 10A, 10B, and 10C. The battery 40 outputs the stored electric power to the drive modules 30A and 30B, which will be described later, when needed.

[0045] The driving modules 30A and 30B drive the driving wheels of the vehicle to drive the vehicle. The driving modules 30A and 30B directly receive the electric power output from the engine power generation modules 10A, 10B, and 10C or receive the electric power stored in the battery 40.

[0046] Each of the driving modules 30A and 30B includes an inverter 31 that converts direct current into alternating current, a driving motor 32 that generates driving force, and a reducer 33 that is connected to an output shaft of the driving motor 32 and reduces the rotation speed of the output shaft. Although only the first driving module 30A is shown in FIG. 3, the remaining driving module 30B also includes the inverter 31, the driving motor 32, and the reducer 33.

[0047] The driving modules 30A, 30B may also be provided in the number required for the vehicle. For example, if the vehicle has two rear axles, two driving modules 30A, 30B may be provided, such as a first driving module 30A and a second driving module 30B, to drive the respective rear axles. Alternatively, if the vehicle has three rear axles, three driving modules may be provided, such as three driving modules to drive the respective rear axles.

[0048] On the other hand, the drive modules 30A, 30B may be configured to output a single output to an output shaft.

[0049] A control unit 50 controls the operation of the engine power generation modules 10A, 10B, and 10C and the drive modules 30A and 30B in accordance with the required output, so as to drive the vehicle.

[0050] When controlling the operation of the engine power generation modules 10A, 10B, 10C, the control unit 50 derives an overall engine efficiency map M from the individual engine efficiency maps M_1, M_2, M_3 of each engine 11 provided in each of the engine power generation modules 10A, 10B, 10C, and drives the multiple engine power generation modules 10A, 10B, 10C according to the overall engine efficiency map M in accordance with the required output.

[0051] Generally, the engine 11 has characteristics as shown in Figs. 4 and 5 during operation. Since the engine 11 has a low RPM, it has a combustion characteristic along A-A'-B'-B from a low output to a maximum output, and inflects at A' and B'. In Fig. 5, the sections e1 and e3 have a high fuel consumption rate relative to the output, and the fuel consumption rate either decreases (section e1) or increases (section e3), so that the engine 11 is not efficient when operated. Section e2 has a low fuel consumption rate relative to the output and the fuel consumption rate changes gradually, and generates a torque proportional to the RPM of the engine 11 and outputs a constant output, so that the engine 11 is operated with optimal efficiency. Section e2 also has excellent power generation efficiency as shown in Fig. 6.

[0052] The engine 11 applied to the engine power generation modules 10A, 10B, and 10C has different specific engine efficiency map shapes and specific values ​​of the engine efficiency map depending on the type of the engine 11, but the overall tendency is as shown in Figures 4 and 5.

[0053] Therefore, the control unit 50 derives an overall engine efficiency map M from individual engine efficiency maps M_1, M_2, M_3 of the engines 11 provided in each of the engine power generation modules 10A, 10B, 10C as shown in Fig. 7. The overall engine efficiency map M is derived by connecting the individual engine efficiency maps M_1, M_2, M_3 of the first engine power generation module 10A to the third engine power generation module 10C such that optimal efficiency sections in which the fuel consumption rate is equal to or less than a predetermined reference L are connected to each other. That is, the overall engine efficiency map M is derived in a form in which sections e2 of each individual engine are connected to each other in each of the engine power generation modules 10A, 10B, 10C.

[0054] When the overall engine efficiency map M is derived as described above, the control unit 50 drives the multiple engine power generation modules 10A, 10B, 10C in accordance with the overall engine efficiency map M in response to the required output, so as to generate power from each of the engine power generation modules 10A, 10B, 10C.

[0055] In particular, the control unit 50 determines the operation order of the engine power generation modules 10A, 10B, and 10C, and derives an overall engine efficiency map M based on the operation order. The reason why the control unit 50 determines the operation order of the engine power generation modules 10A, 10B, and 10C is that if the operation order of the engine power generation modules 10A, 10B, and 10C is fixed, the durability of the engine power generation modules 10A, 10B, and 10C that are operated first among the engine power generation modules 10A, 10B, and 10C will decrease first, so by alternately determining the operation order of the engine power generation modules 10A, 10B, and 10C, the deviation in the accumulated operation time of each of the engine power generation modules 10A, 10B, and 10C is reduced and durability is increased.

[0056] The control unit 50 determines the operation order of the engine power generation modules 10A, 10B, and 10C, and in the process of deriving the overall engine efficiency map M according to that order, the individual engine efficiency maps M_1, M_2, and M_3 of the engines 11 of the engine power generation modules 10A, 10B, and 10C that are operated first are connected to the optimal efficiency section of the individual engine efficiency maps M_1, M_2, and M_3 of the engines 11 of the engine power generation modules 10A, 10B, and 10C that are operated next at a portion B' where the individual engine efficiency maps M_1, M_2, and M_3 bend to increase the fuel consumption rate.

[0057] 8 and 9 show an example in which the control unit 50 determines the operation sequence of the engine power generation modules 10A, 10B, and 10C to derive an overall engine efficiency map M. In Fig. 8 and Fig. 9, the individual engine efficiency maps of the first engine power generation module 10A to the third engine power generation module 10C are shown by a dotted line, a dashed line, and a double-dashed line, respectively, and the first engine power generation module 10A to the third engine power generation module 10C are additionally operated in sequence according to the output of the vehicle.

[0058] FIG. 8 shows an example in which the control unit 50 determines the operation order of the first engine power generation module 10A, the second engine power generation module 10B, and the third engine power generation module 10C in that order. In the initial stage of the vehicle start (section E1) and in the low power section (section E2), only the first engine power generation module 10A operates. Thereafter, when the required output of the vehicle increases and enters the medium power section (section E3), the second engine power generation module 10B is additionally operated. In the medium power section of the vehicle, the output of the first engine power generation module 10A is not increased, and the first engine power generation module 10A is operated in the final state of section E2, and the second engine power generation module 10B is additionally operated along the optimal efficiency section of the second engine power generation module 10B from the time when entering section E3. That is, in section E3, the first engine power generation module 10A is operated in the final state of section E2, and the second engine power generation module 10B is operated along section E3. When changing from the section E2 to the section E3, the first engine power generation module 10A is not operated in a high-power section (e.g., section e3 in FIG. 5) where efficiency is low, and the second engine power generation module 10B is not operated in a starting section (e.g., section e1 in FIG. 5) where efficiency is low, so that the first engine power generation module 10A and the second engine power generation module 10B can avoid a section where efficiency is low. Thereafter, when the required output of the vehicle increases and enters the high-power section (section E4), the first engine power generation module 10A is operated in the final state of the section E2, and the second engine power generation module 10B is operated in the final state of the section E3, while the third engine power generation module 10C is additionally operated along the section E4. Meanwhile, since the maximum output section (section E5) is a section where output is required, the first engine power generation module 10A to the third engine power generation module 10C increase their outputs, respectively, to correspond to the required output of the vehicle.

[0059] This allows the vehicle to operate with optimum efficiency in sections E2 to E4.

[0060] FIG. 9 shows an example in which the control unit 50 determines the operation order of the second engine power generation module 10B, the first engine power generation module 10A, and the third engine power generation module 10C in that order.

[0061] In FIG. 9, the second engine power generation module 10B is operated before the first engine power generation module 10A. The second engine power generation module 10B is operated first in the sections E1 and E2, and when the required output of the vehicle increases, the second engine power generation module 10B is operated in the final state of the section E2, while the first engine power generation module 10A is additionally operated along the section E3. Thereafter, when the required output of the vehicle increases, the second engine power generation module 10B is operated in the final state of the section E2, and the first engine power generation module 10A is operated in the final state of the section E3, while the third engine power generation module 10C is additionally operated along the section E4. Also, when entering the section E5, which is the maximum output section, the first engine power generation module 10A to the third engine power generation module 10C increase their outputs and are operated according to the required output of the vehicle.

[0062] The control unit 50 may be a HCU (Hybrid Control Unit). [Explanation of symbols]

[0063] 10A: First engine generator module 11: Engine 12: Generator 13: Converter 10B: 2nd engine power generation module 10C: 3rd engine power module 20: Fuel tank 30A: First drive module 31: Inverter 32: Drive motor 33: Reducer 30B: Second drive module 40: Battery 50: Control unit

Claims

1. A plurality of engine power generation modules that generate power by operating the engine; a battery for storing electric power output from the plurality of engine power generation modules; a plurality of drive modules that drive drive wheels of a vehicle using electric power input from the engine power generation module or the battery; a control unit that controls the operation of the engine power generation modules and the drive modules in response to a required output of the vehicle; A hybrid system for a vehicle including a plurality of engine power generation modules.

2. The engine power generation module includes: The engine; a generator driven by the engine to generate electricity; a converter that converts the electric power output from the generator and outputs the converted electric power to the battery or the plurality of drive modules; 2. A vehicle hybrid system having a plurality of engine power generating modules according to claim 1, comprising:

3. The control unit is deriving an overall engine efficiency map from the individual engine efficiency maps of each of the engines included in each of the engine power generation modules; driving the plurality of engine power generation modules according to the overall engine efficiency map in response to an output requirement of the vehicle; A vehicle hybrid system comprising a plurality of engine power generating modules according to claim 1.

4. The control unit is deriving the overall engine efficiency map by connecting the individual engine efficiency maps together such that optimal efficiency sections in which the fuel consumption rate is equal to or lower than a predetermined standard are connected to each other; A hybrid system for a vehicle comprising a plurality of engine power generating modules according to claim 3.

5. The control unit is determining an operating sequence for the plurality of engine power generation modules; deriving an overall engine efficiency map such that a portion of the individual engine efficiency map of the engine of the engine power generation module which operates first is connected to an optimal efficiency section of the individual engine efficiency map of the engine of the engine power generation module which operates next at an inflection portion where the fuel consumption rate increases; A hybrid system for a vehicle comprising a plurality of engine power generating modules according to claim 3.

6. The control unit is When the required output of the vehicle increases at a portion where the individual engine efficiency map of the engine of the engine power generation module is inflected so as to increase the fuel consumption rate, the engine output of the engine power generation module that is currently operating is maintained, and the next engine power generation module is operated. A hybrid system for a vehicle comprising a plurality of engine power generating modules according to claim 5.

7. The control unit is When the required output of the vehicle is increased at a portion where the fuel consumption rate increases in the individual engine efficiency map of the engine of the engine power generation module to be last operated, the output of all the engine power generation modules is increased and operated. A hybrid system for a vehicle comprising a plurality of engine power generating modules according to claim 6.

8. The control unit is Varying the operation sequence of the plurality of engine power generation modules; A hybrid system for a vehicle comprising a plurality of engine power generating modules according to claim 5.

9. The engines provided in the plurality of engine power generation modules are configured with different displacements, The control unit selectively operates the plurality of engine power generation modules in response to a required output of the vehicle. A vehicle hybrid system comprising a plurality of engine power generating modules according to claim 1.

10. The engines provided in the plurality of engine power generation modules have the same displacement, The control unit selectively operates the plurality of engine power generation modules in response to a required output of the vehicle. A vehicle hybrid system comprising a plurality of engine power generating modules according to claim 1.

11. The engines provided in the plurality of engine power generation modules are configured such that the displacements of the engines in some of the engine power generation modules are the same and the displacements of the engines in the remaining engine power generation modules are different; The control unit selectively operates the plurality of engine power generation modules in response to a required output of the vehicle. A vehicle hybrid system comprising a plurality of engine power generating modules according to claim 1.

12. The drive module includes: An inverter that converts direct current to alternating current, A drive motor that generates a drive force; a reducer connected to an output shaft of the drive motor and configured to reduce the rotation speed of the output shaft; Including, A vehicle hybrid system comprising a plurality of engine power generating modules according to claim 1.

13. The control unit is configured to operate each of the engines of the plurality of engine power generation modules at an optimal efficiency compatible with an output required by the vehicle, and the engines of the plurality of engine power generation modules are configured to use different fuels. A hybrid system for a vehicle comprising a plurality of engine power generating modules according to claim 3.

14. A plurality of engine power generation modules that generate power by operating the engine; a battery for storing electric power output from the plurality of engine power generation modules; a plurality of drive modules that drive drive wheels of a vehicle using electric power input from the engine power generation module or the battery; a control unit for controlling the operation of the plurality of engine power generation modules and the plurality of drive modules; Including, The engines of the plurality of engine power generation modules are configured such that the displacements of the engines of some of the engine power generation modules are the same, and the displacements of the engines of the remaining engine power generation modules are different, The control unit is configured to operate each engine of the plurality of engine power generating modules at an optimal efficiency consistent with a vehicle output requirement. A vehicle hybrid system equipped with multiple engine power generation modules.

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