Range extender of electric vehicle and control method thereof

Abstract

The present invention discloses a range extender for an electric vehicle and a control method thereof, and relates to the technical field of new energy vehicles. The device includes an engine cylinder assembly, which includes a first cylinder module and a second cylinder module arranged at intervals; a generator assembly, which includes a first generator and a second generator arranged at intervals, and the first generator and the second generator are respectively connected to the first cylinder module and the second cylinder module through a transmission device; a control module, which is connected to the engine cylinder assembly, the generator assembly and the transmission device signal. In the range extender of the present application, the engine module adopts two independently controllable engine cylinder assemblies, and the generator module also adopts two independently enabled generators, so that the range extender can adjust the start timing and working time of each generator and engine to match the working interval of the engine and the generator. The output electric power efficiency is maximized.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a range extender of an electric vehicle and a control method thereof. Background Art

[0002] With the development of the automobile industry, new energy vehicles have become the main development direction of the automobile industry. However, the battery energy density and low-temperature power retention of pure electric vehicles have made the range of pure electric vehicles the main limiting factor. At the same time, the number of charging piles and grid load also limit the rapid development of pure electric vehicles. Therefore, the range-extending system configuration can effectively make up for the above two problems and has become the main technical path for new energy vehicles.

[0003] In the relevant technology, the range extender refers to the combination of the engine, the generator and the generator controller. In most cases, the range extender vehicle operates in pure electric mode. When the battery is insufficient or the vehicle has a higher power output demand, the electricity generated by the engine of the range extender can not only charge the battery, but also be directly output to the drive motor to participate in the drive, which greatly increases the cruising range, solves the range anxiety, and gets rid of the vehicle's dependence on charging piles. However, due to the mechanical and electrical characteristics of the engine and the generator, the high-efficiency range of the engine generally operates at a speed of 2000-3500rpm, while the high-efficiency range of the generator operates at a speed of 3000-5000rpm. Therefore, the overlap of the high-efficiency ranges of the two is relatively low. Although the single efficiency of the engine and the generator is very high, the mismatch of the high-efficiency ranges of the two has a greater impact on the overall efficiency of the range extender system, thereby increasing the fuel consumption of the vehicle and reducing the cruising range. Summary of the invention

[0004] In the prior art, the operation of the generator and engine of the range extender is limited by their own single mechanical operating conditions, and the high-efficiency ranges of the two are difficult to match, resulting in increased fuel consumption and reduced cruising range of the vehicle.

[0005] In a first aspect, the present application provides a range extender for an electric vehicle, comprising:

[0006] An engine cylinder assembly, comprising a first cylinder module and a second cylinder module arranged at intervals;

[0007] A generator assembly, comprising a first generator and a second generator arranged at intervals, wherein the first generator and the second generator are respectively connected to the first cylinder module and the second cylinder module through a transmission device;

[0008] A control module is connected to the engine cylinder assembly, the generator assembly and the transmission device signal; wherein,

[0009] When the control module receives a power demand of the whole vehicle that is lower than the target power, the control module drives the transmission device to disconnect the second generator from the second cylinder module, and sprays fuel and ignites the first cylinder module to drive the first generator to generate electricity. When the control module receives a power demand of the whole vehicle that is higher than the preset target power, the control module sprays fuel and ignites the first cylinder module and the second cylinder module to enable the first generator and the second generator to generate electricity simultaneously.

[0010] In combination with the first aspect, in some embodiments, the transmission device includes:

[0011] An output shaft, which is arranged in the engine cylinder assembly;

[0012] A clutch is arranged between the first generator and the second generator and connected to the output shaft. The clutch is connected to the control module signal. The clutch can drive the output shaft to connect or disconnect with the first generator and the second generator by engaging or disengaging.

[0013] In combination with the first aspect, in some embodiments, the output shaft includes:

[0014] A split crankshaft comprises a first crankshaft and a second crankshaft which are connectable to each other, wherein the first crankshaft and the second crankshaft are respectively arranged in the first cylinder module and the second cylinder module;

[0015] The split crankshaft is configured as follows: when the clutch is in an engaged state, the first crankshaft and the second crankshaft are connected, and the first generator and the second generator are connected to the first cylinder module and the second cylinder module; when the clutch is in a disengaged state, the first generator or the second generator is disconnected from the engine cylinder assembly.

[0016] In combination with the first aspect, in some embodiments, the first cylinder module includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are both connected to the first crankshaft, the first cylinder and the second cylinder are both provided with a spark plug, and each of the spark plugs is connected to the control module signal;

[0017] The second cylinder module includes a third cylinder and a fourth cylinder, both of which are connected to the second crankshaft, and both of which are provided with spark plugs, and each of which is connected to the control module signal.

[0018] In combination with the first aspect, in some embodiments, the control module includes:

[0019] a generator controller, which is signal-connected to the generator assembly;

[0020] a range extender controller connected to the clutch signal;

[0021] An engine controller, which is signal-connected to each of the spark plugs;

[0022] A vehicle controller is connected to the range extender controller signal, and the vehicle controller is used to receive the vehicle power demand and send control instructions to the range extender controller according to the vehicle power demand.

[0023] In a second aspect, the present application provides a control method using any of the above range extenders, comprising the following steps:

[0024] Use the control module to determine the power demand of the vehicle;

[0025] When the vehicle power demand is lower than the target power, the second generator is driven to disconnect from the second cylinder module through the transmission device, the second cylinder module is controlled to close the cylinder, the first cylinder module is sprayed with oil and ignited, and the first generator is made to output power until the vehicle power meets the vehicle power demand;

[0026] When the vehicle power demand is higher than the target power, the transmission device drives the second generator to be connected to the second cylinder module, and the first cylinder module and the second cylinder module are sprayed with fuel and ignited, and the first generator and the second generator output power until the vehicle power meets the vehicle power demand.

[0027] In combination with the second aspect, in some embodiments, the step of driving the second generator to disconnect from the second cylinder module through a transmission device includes:

[0028] The clutch of the transmission device is controlled to be disengaged to disconnect the output shaft from the second generator.

[0029] In combination with the second aspect, in some embodiments, driving the second generator to be connected to the second cylinder module through the transmission device includes:

[0030] The clutch is controlled to engage so that the first crankshaft and the second crankshaft of the output shaft are connected to each other, so that the first generator and the second generator are connected to the first cylinder module and the second cylinder module.

[0031] In conjunction with the second aspect, in some embodiments, the using control module to judge the power demand of the whole vehicle includes:

[0032] The range extender controller calculates the target power demand matrix based on the target power given by the vehicle controller;

[0033] When the target power demand matrix is ​​lower than the target power matrix, it is determined that the vehicle power demand is lower than the target power;

[0034] When the target power demand matrix is ​​higher than the target power matrix, it is determined that the vehicle power demand is higher than the target power.

[0035] In combination with the second aspect, in some embodiments, the step of injecting oil and igniting the first cylinder module and causing the first generator to output power includes:

[0036] The engine controller controls the spark plugs on the third and fourth cylinders to perform cylinder closing action, and drives the spark plugs on the first and second cylinders to spray fuel and ignite;

[0037] The generator controller drives the first generator to output power at a preset target torque.

[0038] In summary, the engine module in the range extender of the present application uses two independently controllable engine cylinder assemblies, and the generator module also uses two independently enabled generators, so that the range extender can adjust the start timing and working time of each generator and engine to match the working interval of the engine and generator, so as to maximize the output power efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 is a schematic diagram of a range extender in an embodiment of the present invention;

[0041] Figure 2 Flow chart of a range extender control method in an embodiment of the present invention.

[0042] In the figure: 1. Engine cylinder assembly; 11. First cylinder module; 111. First cylinder; 112. Second cylinder; 12. Second cylinder module; 121. Third cylinder; 122. Fourth cylinder; 2. Generator assembly; 21. First generator; 22. Second generator; 3. Transmission; 31. Clutch; 32. Split crankshaft; 321. First crankshaft; 322. Second crankshaft; 4. Control module; 5. Spark plug. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. In view of the fact that the operation of the generator and the engine of the range extender in the prior art is limited by the operating conditions of their own single mechanical units, it is difficult to match the high-efficiency ranges of the two efficiencies, resulting in increased fuel consumption of the entire vehicle and reduced cruising range. It should be noted that the current power generation of the range extender is generally a power following or fixed-point power generation mode, that is, following the power generation demand of the entire vehicle, the discharge power response of the battery, the efficiency of the generator, the maximum output power of the range extender, NVH performance, emissions and other performance, to select a series of continuous or discrete power generation operating points. However, for a range extender, the operating points that meet its high-efficiency range, suitable power point and suitable speed conditions are relatively complex, and it is necessary to comprehensively consider various factors, and there are even contradictions in the selection of points for individual operating conditions (for example, the efficiency or power corresponding to the low-speed point with better NVH is relatively low).

[0045] In a first aspect, the present application provides a range extender for an electric vehicle, which comprises: an engine cylinder assembly 1, a generator assembly 2 and a control module 4; wherein:

[0046] The engine cylinder assembly 1 includes a first cylinder module 11 and a second cylinder module 12 arranged at intervals. The generator assembly 2 includes a first generator 21 and a second generator 22 arranged at intervals, and the first generator 21 and the second generator 22 are respectively connected to the first cylinder module 11 and the second cylinder module 12 through a transmission device 3. The control module 4 is connected to the engine cylinder assembly 1, the generator assembly 2 and the transmission device 3 by signal; wherein,

[0047] When the control module 4 receives a power demand of the whole vehicle that is lower than the target power, the control module 4 drives the transmission device 3 to disconnect the second generator 22 from the second cylinder module 12, and sprays fuel and ignites the first cylinder module 11 to drive the first generator 21 to generate electricity. When the control module 4 receives a power demand of the whole vehicle that is higher than the preset target power, the control module 4 sprays fuel and ignites the first cylinder module 11 and the second cylinder module 12 to enable the first generator 21 and the second generator 22 to generate electricity simultaneously.

[0048] It is understandable that the control module 4 needs to make calculations and judgments based on the received vehicle power demand, and adjust the generator and the engine, specifically how many units work at the same time, and the working time and duration of both, so that the universal characteristics corresponding to the working generator match the universal characteristics when the engine cylinder is ignited and running, so that the generator and the engine always run in a high efficiency zone. At the same time, fuel economy, NVN performance and emission performance are met.

[0049] It should be noted that in the present application, the engine cylinder assembly 1 and the generator assembly 2 are each provided with a plurality of independently controllable units, which can work simultaneously to meet high power requirements, or work separately to meet low power requirements. In normal operation, when the whole vehicle is idling or the power demand received by the whole vehicle is lower than the target power, generally a set of generators and cylinder modules can be enabled to meet the power generation demand. When the whole vehicle is at a low SOC or the power generation demand received by the whole vehicle is higher than the preset target power, generally the first cylinder module 11, the second cylinder module 12, the first generator 21 and the second generator 22 can be enabled at the same time, and work simultaneously to meet the power generation demand.

[0050] Specifically, the transmission device 3 includes: an output shaft and a clutch 31; wherein,

[0051] An output shaft is arranged in the engine cylinder assembly 1; a clutch 31 is arranged between the first generator 21 and the second generator 22 and connected to the output shaft, the clutch 31 is connected to the control module 4 signal, and the clutch 31 can drive the output shaft to connect or disconnect with the first generator 21 and the second generator 22 by engaging or disengaging.

[0052] In some preferred embodiments, the output shaft includes: a split crankshaft 32, which includes a first crankshaft 321 and a second crankshaft 322 that can be connected to each other, and the first crankshaft 321 and the second crankshaft 322 are respectively arranged in the first cylinder module 11 and the second cylinder module 12;

[0053] The split crankshaft 32 is configured as follows: when the clutch 31 is in an engaged state, the first crankshaft 321 and the second crankshaft 322 are connected, and the first generator 21 and the second generator 22 are connected to the first cylinder module 11 and the second cylinder module 12; when the clutch 31 is in a disengaged state, the first generator 21 or the second generator 22 is disconnected from the engine cylinder assembly 1.

[0054] It can be understood that the purpose of using a split crankshaft 32 in the present application is to achieve disconnection or connection by driving the left and right first generators 21 and the second generator 22 to engage through the clutch 31. The main intention is to achieve the target power generation requirement by disconnecting the crankshaft under low load conditions, thereby reducing the additional drag load and ignition energy of the integral crankshaft.

[0055] Further, the first cylinder module 11 includes a first cylinder 111 and a second cylinder 112, both of which are connected to the first crankshaft 321, and both of which are provided with spark plugs 5, each of which is signal-connected to the control module 4. The second cylinder module 12 includes a third cylinder 121 and a fourth cylinder 122, both of which are connected to the second crankshaft 322, and both of which are provided with spark plugs 5, each of which is signal-connected to the control module 4.

[0056] It can be understood that each of the spark plugs 5 can be individually controlled to ignite, which greatly improves the flexibility of engine power adjustment and meets the adjustment requirements for matching the high-efficiency ranges of the engine cylinder assembly 1 and the generator assembly 2.

[0057] Specifically, Figure 2 As shown, the control module 4 includes: a generator controller (ie, GCU), a range extender controller (ie, RECU) and a vehicle controller (ie, VCU); wherein;

[0058] A generator controller, which is signal-connected to the generator assembly 2; a range extender controller, which is signal-connected to the clutch 31; an engine controller, which is signal-connected to each of the spark plugs 5; a vehicle controller, which is signal-connected to the range extender controller, and the vehicle controller is used to receive the power demand of the vehicle and issue control instructions to the range extender controller according to the power demand of the vehicle.

[0059] In a second aspect, the present application provides a control method using any of the above range extenders, comprising the following steps:

[0060] S1. Use control module 4 to determine the power demand of the vehicle;

[0061] Furthermore, the above-mentioned step S1 includes: the range extender controller calculates the target power demand matrix according to the target power given by the vehicle controller; when the target power demand matrix is ​​lower than the target power matrix, it is judged that the vehicle power demand is lower than the target power; when the target power demand matrix is ​​higher than the target power matrix, it is judged that the vehicle power demand is higher than the target power.

[0062] S2. The engine cylinder assembly 1 and the generator assembly 2 are driven by the control module 4; wherein,

[0063] a. When the vehicle power demand is lower than the target power, the transmission device 3 is used to drive the second generator 22 to disconnect from the second cylinder module 12, control the second cylinder module 12 to close the cylinder, spray fuel to the first cylinder module 11 and ignite it, and make the first generator 21 output power until the vehicle power meets the vehicle power demand;

[0064] Furthermore, driving the second generator 22 to disconnect from the second cylinder module 12 through the transmission device 3 includes: controlling the clutch 31 of the transmission device 3 to disconnect, so that the output shaft is disconnected from the second generator 22 .

[0065] Specifically, when the vehicle is idling or has low power demand, the vehicle controller VCU sends a target power to the range extender controller RECU. The range extender controller RECU enables the clutch 31 (electromagnetic clutch can be used) to be in a disconnected state based on the low power target demand matrix. At this time, the first crankshaft 321 is disconnected from the first generator 21. At the same time, RECU sends an injection ignition command to the first cylinder 111 and the second cylinder 112 to the engine controller ECU and gives the engine target speed. At the same time, the spark plugs of the third cylinder 121 and the fourth cylinder 122 are inhibited from ignition and are in a closed cylinder state. Furthermore, RECU sends a torque command to the generator controller GCU, enabling the generator to output power with a preset target torque. So that at this time, the universal characteristics corresponding to the generator assembly 2 match the universal characteristics when the engine cylinder is ignited, so that the generator assembly 2 and the engine (1st and 2nd cylinders are ignited) always operate in a high efficiency zone, while meeting fuel economy, NVN performance and emission performance.

[0066] b. When the vehicle power demand is higher than the target power, the transmission device 3 drives the second generator 22 to be connected to the second cylinder module 12, and the first cylinder module 11 and the second cylinder module 12 are sprayed and ignited, and the first generator 21 and the second generator 22 output power until the vehicle power meets the vehicle power demand.

[0067] Furthermore, driving the second generator 22 to connect with the second cylinder module 12 through the transmission device 3 includes: controlling the clutch 31 to engage so that the first crankshaft 321 and the second crankshaft 322 of the output shaft are connected to each other, so that the first generator 21 and the second generator 22 are connected to the first cylinder module 11 and the second cylinder module 12.

[0068] Specifically, when the vehicle has a low SOC or a high-power power generation demand, the vehicle controller VCU sends a target power to the range extender controller RECU. The range extender controller RECU enables the electromagnetic clutch to be in a coupled state based on the high-power target demand matrix. At this time, the crankshaft 1 / 2 is coupled with the generator 1 / 2. At the same time, the RECU sends injection ignition instructions to the 1st, 2nd, 3rd, and 4th cylinders of the engine controller ECU and gives the target engine speed. Then, the RECU sends a torque instruction to the generator controller GCU, enabling the first generator 21 and the second generator 22 to perform torque control for power generation.

[0069] At this time, the universal characteristics corresponding to the first generator 21 and the second generator 22 match the universal characteristics of the engine 1 / 2 / 3 / 4 cylinder ignition operation, so that the first generator 21 and the second generator 22 and the engine (1 / 2 / 3 / 4 cylinder ignition) always operate in a high efficiency zone, while meeting fuel economy, NVN performance and emission performance.

[0070] c. When the vehicle is generating electricity under variable operating conditions (the vehicle switches from high power demand to low power demand, or from low power to high power), the clutch 31 is controlled to be disconnected and engaged, and the engine cylinder assembly 1 is controlled to be shut down and ignited, so as to ensure that the generator assembly 2 is fully coupled with the high-efficiency range of the engine to avoid deviation from the high-efficiency range.

[0071] In summary, the engine module in the range extender of this application uses two independently controllable engine cylinder assemblies, and the generator module also uses two independently enabled generators, so that the range extender can adjust the start timing and working time of each generator and engine to match the high working range of the engine and the generator. Maximize the output power efficiency. Specifically, based on the power demand of the VCU, and through the combustion control of the generator 1 / 2 and each cylinder of the engine (electronic clutch opening and closing / combustion chamber opening and closing cylinder), the generator and the engine can achieve speed / torque coupling and high-efficiency range coupling in the commonly used speed working range (800-3500rpm), so that the output power efficiency is maximized. By switching the electromagnetic clutch switch and the engine cylinder closing state, different power selection point combinations of the generator and the engine can be achieved, thereby meeting the appropriate power generation power target of the VCU.

[0072] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0073] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0074] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A range extender for an electric vehicle, characterized in that: include: An engine cylinder assembly (1) comprises a first cylinder module (11) and a second cylinder module (12) which are arranged at an interval; A generator assembly (2), comprising a first generator (21) and a second generator (22) arranged at intervals, wherein the first generator (21) and the second generator (22) are connected to the first cylinder module (11) and the second cylinder module (12) respectively through a transmission device (3), wherein the transmission device (3) comprises: an output shaft and a clutch (31), wherein the output shaft is arranged in the engine cylinder assembly (1), wherein the clutch (31) is arranged between the first generator (21) and the second generator (22) and is connected to the output shaft, wherein the clutch (31) can drive the output shaft to connect or disconnect with the first generator (21) and the second generator (22) by engaging or disengaging, and wherein the output shaft comprises: a split crankshaft (32), wherein the split crankshaft (32) comprises a first crankshaft (321) and a second crankshaft (322) which can be connected to each other, wherein the first crankshaft (321) and the second crankshaft (322) are arranged in the first cylinder module (11) and the second cylinder module (12) respectively; The split crankshaft (32) is configured such that: when the clutch (31) is in an engaged state, the first crankshaft (321) and the second crankshaft (322) are connected, and the first generator (21) and the second generator (22) are connected to the first cylinder module (11) and the second cylinder module (12); when the clutch (31) is in a disconnected state, the first generator (21) or the second generator (22) is disconnected from the engine cylinder assembly (1); A control module (4) is connected to the engine cylinder assembly (1), the generator assembly (2) and the transmission device (3) by signals; wherein: When the control module (4) receives a power demand of the whole vehicle that is lower than the target power, the control module (4) drives the transmission device (3) to disconnect the second generator (22) from the second cylinder module (12), and injects oil to ignite the first cylinder module (11) to drive the first generator (21) to generate electricity; when the control module (4) receives a power demand of the whole vehicle that is higher than the preset target power, the control module (4) injects oil to ignite the first cylinder module (11) and the second cylinder module (12) to enable the first generator (21) and the second generator (22) to generate electricity simultaneously.

2. The range extender according to claim 1, characterized in that: The first cylinder module (11) comprises a first cylinder (111) and a second cylinder (112), the first cylinder (111) and the second cylinder (112) are both connected to the first crankshaft (321), the first cylinder (111) and the second cylinder (112) are both provided with a spark plug (5), and each of the spark plugs (5) is signal-connected to the control module (4); The second cylinder module (12) comprises a third cylinder (121) and a fourth cylinder (122), the third cylinder (121) and the fourth cylinder (122) are both connected to the second crankshaft (322), the third cylinder (121) and the fourth cylinder (122) are both provided with a spark plug (5), and each of the spark plugs (5) is signal-connected to the control module (4).

3. The range extender according to claim 2, characterized in that: The control module (4) comprises: A generator controller, which is signal-connected to the generator assembly (2); a range extender controller, which is signal-connected to the clutch (31); An engine controller, which is signal-connected to each of the spark plugs (5); A vehicle controller is connected to the range extender controller signal, and the vehicle controller is used to receive the vehicle power demand and send control instructions to the range extender controller according to the vehicle power demand.

4. A control method using the range extender according to any one of claims 1 to 3, characterized in that: The following steps are involved: Using the control module (4) to determine the power demand of the entire vehicle; The engine cylinder assembly (1) and the generator assembly (2) are driven to operate by a control module (4); wherein: When the vehicle power demand is lower than the target power, the clutch (31) of the transmission device (3) is controlled to be disconnected so that its output shaft is disconnected from the second generator (22), the second cylinder module (12) is controlled to be closed, the first cylinder module (11) is sprayed with oil and ignited, and the first generator (21) is made to output the generated power until the vehicle power meets the vehicle power demand; When the vehicle power demand is higher than the target power, the clutch (31) is controlled to engage so that the first crankshaft (321) and the second crankshaft (322) of the output shaft are connected to each other, so that the first generator (21) and the second generator (22) are connected to the first cylinder module (11) and the second cylinder module (12), and the first cylinder module (11) and the second cylinder module (12) are sprayed with fuel and ignited, and the first generator (21) and the second generator (22) output the generated power until the vehicle power meets the vehicle power demand.

5. The control method according to claim 4, characterized in that: The use control module (4) determines the power demand of the whole vehicle, including: The range extender controller calculates the target power demand matrix based on the target power given by the vehicle controller; When the target power demand matrix is ​​lower than the target power matrix, it is determined that the vehicle power demand is lower than the target power; When the target power demand matrix is ​​higher than the target power matrix, it is determined that the vehicle power demand is higher than the target power.

6. The control method according to claim 5, characterized in that: The step of injecting oil into the first oil cylinder module (11) and igniting the first generator (21) to output power comprises: The engine controller controls the spark plugs (5) on the third oil cylinder (121) and the fourth oil cylinder (122) to perform a cylinder closing action, and drives the spark plugs (5) on the first oil cylinder (111) and the second oil cylinder (112) to spray oil and ignite; The generator controller drives the first generator (21) to output power generation at a preset target torque.

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