CN117227515A

CN117227515A - Range extender of electric automobile and control method thereof

Info

Publication number: CN117227515A
Application number: CN202311409448.4A
Authority: CN
Inventors: 范鹏; 金永镇; 毕帅; 邓湘
Original assignee: Lantu Automobile Technology Co Ltd
Current assignee: Lantu Automobile Technology Co Ltd
Priority date: 2023-10-27
Filing date: 2023-10-27
Publication date: 2023-12-15

Abstract

The application discloses a range extender of an electric automobile and a control method thereof, and relates to the technical field of new energy automobiles, wherein the device comprises an engine oil cylinder assembly, and the engine oil cylinder assembly comprises a first oil cylinder module and a second oil cylinder module which are arranged at intervals; the generator assembly comprises a first generator and a second generator which are arranged at intervals, and the first generator and the second generator are respectively connected with the first oil cylinder module and the second oil cylinder module through a transmission device; and the control module is in signal connection with the engine oil cylinder assembly, the generator assembly and the transmission device. The engine module in the range extender adopts two independently controllable engine oil cylinder assemblies, and the generator module also adopts two independently activatable generators, so that the range extender can enable the engine to be matched with a working college section of the generator by adjusting the starting time and the working time of each generator and the engine. Maximizing output electrical power efficiency.

Description

Range extender of electric automobile and control method thereof

Technical Field

The application relates to the technical field of new energy automobiles, in particular to a range extender of an electric automobile and a control method thereof.

Background

With the development of the automobile industry, a new energy automobile becomes a main development direction of the automobile industry, but a pure electric automobile becomes a main limiting link for the endurance mileage due to factors such as battery energy density, low-temperature power maintenance and the like. Meanwhile, the number of charging piles, the power grid load and the like limit the rapid development of the pure electric vehicle, so that the range-extending system configuration can effectively make up the two problems, and becomes a main technical path of the current new energy automobile.

In the related art, a range extender refers to a combination of an engine, a generator, and a generator controller. The range extender vehicle works in a pure electric mode under most conditions, when the electric quantity is insufficient or the whole vehicle has higher power output requirement, the electricity sent by the engine of the range extender can be used for charging a battery and can be directly output to the driving motor to participate in driving, so that the endurance mileage is greatly increased, the endurance anxiety is solved, and meanwhile, the dependence of the vehicle on a charging pile is eliminated. However, due to the mechanical and electrical characteristics of the engine and the generator, the working speed of the engine in the high-efficiency section is generally 2000-3500rpm, and the working speed of the generator in the high-efficiency section is 3000-5000rpm, so that the overlap ratio of the high-efficiency section and the high-efficiency section is low, and the influence of the mismatch of the high-efficiency section and the high-efficiency section on the overall efficiency of the range extender system is large, so that the fuel consumption of the whole vehicle is increased, and the range is reduced.

Disclosure of Invention

The problems that in the prior art, the operation of a generator and an engine of the range extender is limited by the operation working condition of a single machine, the efficiency of the generator and the engine is difficult to match, and the oil consumption of the whole vehicle is increased and the endurance mileage is reduced are solved.

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

the engine oil cylinder assembly comprises a first oil cylinder module and a second oil cylinder module which are arranged at intervals;

the generator assembly comprises a first generator and a second generator which are arranged at intervals, and the first generator and the second generator are respectively connected with the first oil cylinder module and the second oil cylinder module through a transmission device;

the control module is in signal connection with the engine oil cylinder assembly, the generator assembly and the transmission device; wherein,

when the control module receives the power demand of the whole vehicle lower than the target power, the control module drives the transmission device to disconnect the second generator from the second oil cylinder module, and sprays oil to the first oil cylinder module to ignite so as to drive the first generator to generate power, and when the control module receives the power demand of the whole vehicle higher than the preset target power, the control module sprays oil to the first oil cylinder module and the second oil cylinder module to ignite so as to enable the first generator and the second generator to generate power simultaneously.

With reference to the first aspect, in some embodiments, the transmission device includes:

the output shaft is arranged in the engine oil cylinder assembly;

the clutch is arranged between the first generator and the second generator and connected with the output shaft, the clutch is in signal connection with the control module, and the clutch can drive the output shaft to be connected with or disconnected from the first generator and the second generator through engaging or disengaging.

With reference to the first aspect, in some embodiments, the output shaft includes:

the split type crankshaft comprises a first crankshaft and a second crankshaft which can be connected with each other, and the first crankshaft and the second crankshaft are respectively arranged in the first oil cylinder module and the second oil cylinder module;

the split crankshaft is configured to: when the clutch is in a suction state, the first crankshaft is connected with the second crankshaft, the first generator is connected with the first oil cylinder module and the second generator is connected with the second oil cylinder module, and when the clutch is in a disconnection state, the first generator or the second generator is disconnected with the engine oil cylinder assembly.

With reference to the first aspect, in some embodiments, the first cylinder module includes a first cylinder and a second cylinder, where 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 spark plugs, and each spark plug is in signal connection with the control module;

the second oil cylinder module comprises a third oil cylinder and a fourth oil cylinder, the third oil cylinder and the fourth oil cylinder are connected with the second crankshaft, spark plugs are arranged on the third oil cylinder and the fourth oil cylinder, and each spark plug is connected with the control module through signals.

With reference to the first aspect, in some embodiments, the control module includes:

a generator controller in signal communication with the generator assembly;

a range extender controller in signal communication with the clutch;

an engine controller in signal communication with each of said spark plugs;

the whole vehicle controller is in signal connection with the range extender controller, and is used for receiving the whole vehicle power demand and sending a control instruction to the range extender controller according to the whole vehicle power demand.

In a second aspect, the present application provides a control method using any one of the above-mentioned range extender, including the steps of:

judging the power requirement of the whole vehicle by using a control module;

when the power requirement of the whole vehicle is lower than the target power, the second generator is driven to be disconnected with the second oil cylinder module through the transmission device, the second oil cylinder module is controlled to be closed, the first oil cylinder module is subjected to oil injection ignition, and the first generator is enabled to output power generation until the power of the whole vehicle meets the power requirement of the whole vehicle;

when the power demand of the whole vehicle is higher than the target power, the transmission device drives the second generator to be connected with the second oil cylinder module, oil injection ignition is carried out on the first oil cylinder module and the second oil cylinder module, and the first generator and the second generator output power until the power of the whole vehicle meets the power demand of the whole vehicle.

With reference to the second aspect, in some embodiments, the driving the second generator to disconnect from the second cylinder module by a transmission device includes:

and controlling the clutch of the transmission device to be disconnected so as to disconnect the output shaft from the second generator.

With reference to the second aspect, in some embodiments, the driving the second generator through the transmission device is connected to the second cylinder module, including:

and controlling the clutch to be engaged so as to connect the first crankshaft and the second crankshaft of the output shaft with each other, and connecting the first generator and the second generator with the first oil cylinder module and the second oil cylinder module.

With reference to the second aspect, in some embodiments, the determining, by using a control module, a power requirement of the whole vehicle includes:

the range extender controller calculates a target power demand matrix according to target power given by the whole vehicle controller;

when the target power demand matrix is lower than the target power matrix, judging that the whole vehicle power demand is lower than the target power;

and when the target power demand matrix is higher than the target power matrix, judging that the whole vehicle power demand is higher than the target power.

With reference to the second aspect, in some embodiments, the injecting fuel into the first cylinder module to ignite and make the first generator output generated power includes:

the engine controller controls the spark plugs on the third oil cylinder and the fourth oil cylinder to execute a cylinder closing action and drives the spark plugs on the first oil cylinder and the second oil cylinder to spray oil for ignition;

and driving the first generator to output the generated power with a preset target torque through a generator controller.

In summary, the engine module in the range extender of the application adopts two engine cylinder assemblies which can be controlled independently, and the generator module also adopts two generators which can be started independently, so that the range extender can enable the engine to be matched with the working university interval of the generator by adjusting the starting time and the working time of each generator and the engine. Maximizing output electrical power efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a range extender according to an embodiment of the present application;

fig. 2 is a flowchart of a range extender control method in an embodiment of the application.

In the figure: 1. an engine cylinder assembly; 11. a first cylinder module; 111. a first cylinder; 112. a second cylinder; 12. a second cylinder module; 121. a third cylinder; 122. a fourth cylinder; 2. a generator assembly; 21. a first generator; 22. a second generator; 3. a transmission device; 31. a clutch; 32. a split crankshaft; 321. a first crankshaft; 322. a second crankshaft; 4. a control module; 5. a spark plug.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Embodiments of the present application are described in further detail below with reference to the accompanying drawings. The problems that in the prior art, the operation of a generator and an engine of the range extender is limited by the operation working condition of a single machine, the efficiency of the generator and the engine is difficult to match, and the oil consumption of the whole vehicle is increased and the endurance mileage is reduced are solved. It should be noted that, the current range extender generally generates power in a power following or fixed-point power generation mode, that is, a series of continuous or discrete power generation working conditions are selected by following the power demand of the whole vehicle, the discharge power response of the battery, the efficiency of the generator, the maximum output power of the range extender, the NVH performance, the emission and other performances. However, for a range extender, the working condition points satisfying the high-efficiency interval, the proper power point and the proper rotation speed condition are relatively complex, and various factors need to be comprehensively considered, even contradiction exists between individual working condition points (such as low rotation speed point with better NVH (noise and vibration) and lower power).

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

the engine oil cylinder assembly 1 comprises a first oil cylinder module 11 and a second oil cylinder module 12 which are arranged at intervals. The generator assembly 2 comprises a first generator 21 and a second generator 22 which are arranged at intervals, and the first generator 21 and the second generator 22 are respectively connected with the first oil cylinder module 11 and the second oil cylinder module 12 through a transmission device 3. The control module 4 is in signal connection with the engine oil cylinder assembly 1, the generator assembly 2 and the transmission device 3; wherein,

when the control module 4 receives a power demand that the whole vehicle is lower than a 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 oil to the first cylinder module 11 to ignite so as to drive the first generator 21 to generate electricity, and when the control module 4 receives a power demand that the whole vehicle is higher than a preset target power, the control module 4 sprays oil to the first cylinder module 11 and the second cylinder module 12 to ignite so as to enable the first generator 21 and the second generator 22 to generate electricity simultaneously.

It can be understood that the control module 4 needs to perform calculation and judgment according to the received power requirement of the whole vehicle, and adjust the generator and the engine, and specifically several generators work simultaneously and work time and duration of both, so that the universal characteristic corresponding to the working generator is matched with the universal characteristic when the engine cylinder is in ignition operation, and the generator and the engine always operate in a high-efficiency area. And simultaneously meets the fuel economy, NVN performance and emission performance.

It should be noted that, in the present application, a plurality of independent controllable units are respectively disposed in the engine cylinder assembly 1 and the generator assembly 2, so that the engine cylinder assembly and the generator assembly can work simultaneously to meet the high power requirement, and can also work independently to meet the low power requirement. When the whole vehicle is idling or the power demand of the whole vehicle lower than the target power is received, a group of generators and oil cylinder modules can be started to meet the power generation demand. When the whole vehicle is in low SOC or the power generation requirement that the whole vehicle is higher than the preset target power is received, the first cylinder module 11, the second cylinder module 12, the first generator 21 and the second generator 22 can be started at the same time, and the power generation requirement can be met.

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

an output shaft provided in the engine cylinder assembly 1; a clutch 31, which is disposed between the first generator 21 and the second generator 22 and is connected to the output shaft, the clutch 31 is signal-connected to the control module 4, and the clutch 31 can drive the output shaft to connect or disconnect from the first generator 21 and the second generator 22 by engaging or disengaging.

In some preferred embodiments, the output shaft comprises: a split crankshaft 32 including a first crankshaft 321 and a second crankshaft 322 that are connectable to each other, the first crankshaft 321 and the second crankshaft 322 being provided in the first cylinder module 11 and the second cylinder module 12, respectively;

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

It will be appreciated that the present application employing split crankshaft 32 is intended to achieve decoupling or coupling by clutch 31 driving the drawing of the left and right first generators 21 and second generators 22, primarily intended to reduce the additional drag load and ignition energy of the integral crankshaft by decoupling the crankshaft to achieve the target generated power requirement under low load conditions.

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

It can be understood that each spark plug 5 can be independently controlled to ignite, so that the flexibility of engine power adjustment is greatly improved, and the adjustment requirements of the efficient interval matching of the engine oil cylinder assembly 1 and the generator assembly 2 are met.

Specifically, as shown in fig. 2, the control module 4 includes: generator controller (i.e., GCU), range extender controller (i.e., RECU), and whole vehicle controller (i.e., VCU); wherein;

a generator controller in signal communication with the generator assembly 2; a range extender controller in signal communication with the clutch 31; an engine controller in signal communication with each of said spark plugs 5; the whole vehicle controller is in signal connection with the range extender controller, and is used for receiving the whole vehicle power demand and sending a control instruction to the range extender controller according to the whole vehicle power demand.

s1, judging the power requirement of the whole vehicle by using a control module 4;

further, the step S1 includes: the range extender controller calculates a target power demand matrix according to target power given by the whole vehicle controller; when the target power demand matrix is lower than the target power matrix, judging that the whole vehicle power demand is lower than the target power; and when the target power demand matrix is higher than the target power matrix, judging that the whole vehicle power demand is higher than the target power.

S2, driving the engine oil cylinder assembly 1 and the generator assembly 2 to operate through the control module 4; wherein,

a. when the power demand of the whole vehicle is lower than the target power, the transmission device 3 drives the second generator 22 to be disconnected with the second oil cylinder module 12, the second oil cylinder module 12 is controlled to be closed, the first oil cylinder module 11 is subjected to oil injection and ignition, and the first generator 21 is enabled to output power generation until the power of the whole vehicle meets the power demand of the whole vehicle;

further, the driving the second generator 22 to disconnect from the second cylinder module 12 through the transmission device 3 includes: the clutch 31 of the transmission 3 is controlled to be disconnected so that the output shaft is disconnected from the second generator 22.

Specifically, when the vehicle is idling or in low power demand, the vehicle controller VCU sends target power to the range extender controller RECU, and the range extender controller RECU enables the clutch 31 (optionally, an electromagnetic clutch) to be in a disconnected state based on the low power target demand matrix, and at this time, the first crankshaft 321 is disconnected from the first generator 21. At the same time, the RECU sends fuel injection ignition instructions to the first cylinder 111 and the second cylinder 112 to give the target engine speed, and at the same time, the spark plugs of the third cylinder 121 and the fourth cylinder 122 are suppressed from being ignited and are in a cylinder closing state. Further, the RECU issues a torque command to the generator controller GCU, enabling the generator to perform torque to output the generated power at a preset target torque. In this case, the universal characteristic of the generator assembly 2 is matched with the universal characteristic of the engine cylinder when the engine is operated in ignition mode, so that the generator assembly 2 and the engine (the 1 st and 2 nd cylinders are ignited) always operate in a high-efficiency area, and the fuel economy, NVN performance and emission performance are met.

b. When the power demand of the whole vehicle is higher than the target power, the transmission device 3 drives the second generator 22 to be connected with the second oil cylinder module 12, and the first oil cylinder module 11 and the second oil cylinder module 12 are subjected to oil injection and ignition, and the first generator 21 and the second generator 22 are enabled to output power generation power until the power of the whole vehicle meets the power demand of the whole vehicle.

Further, the driving the second generator 22 through the transmission device 3 to connect with the second cylinder module 12 includes: the clutch 31 is controlled to be engaged so that the first crankshaft 321 and the second crankshaft 322 of the output shaft are connected to each other to connect the first generator 21 and the second generator 22 to the first cylinder module 11 and the second cylinder module 12.

Specifically, when the whole vehicle has low SOC or high-power generation requirement, the whole vehicle controller VCU sends target power to the range extender controller RECU, and the range extender controller RECU enables the electromagnetic clutch to be in a combined state based on the high-power target requirement matrix, and at the moment, the crankshaft 1/2 is combined with the generator 1/2. Simultaneously, the RECU sends out oil injection ignition instructions to the 1 st, 2 nd, 3 rd and 4 th oil cylinders of the engine controller ECU and gives out the target rotating speed of the engine, and then, the RECU sends out torque instructions to the generator controller GCU, so that the first generator 21 and the second generator 22 can carry out torque control to generate electricity.

At this time, the universal characteristics of the first generator 21 and the second generator 22 are matched with those of the engine in the 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 region, and simultaneously, the fuel economy, NVN performance and emission performance are satisfied.

c. When the whole vehicle generates power under variable working conditions (the whole vehicle high power requirement is switched to the low power requirement and the whole vehicle low power is switched to the high power), the high-efficiency interval of the generator component 2 and the engine can be fully coupled by controlling the disconnection and combination of the clutch 31 and the closing and ignition of the engine cylinder component 1, so that the deviation of the high-efficiency interval is avoided.

In summary, the engine module in the range extender of the application adopts two engine cylinder assemblies which can be controlled independently, and the generator module also adopts two generators which can be started independently, so that the range extender can enable the engine to be matched with the working university interval of the generator by adjusting the starting time and the working time of each generator and the engine. Maximizing output electrical power efficiency. Specifically, based on the VCU generated power requirement and through combustion control (electronic clutch opening/closing/combustion chamber opening/closing) of the generator 1/2 and each cylinder of the engine, the generator and the engine can realize rotational speed/torque coupling and efficient interval coupling of the generator and the engine in a common rotational speed working interval (800-3500 rpm), so that the output electric power efficiency is maximized. The electromagnetic clutch switch and the engine cylinder closing state are switched to realize power selection point combinations of different generators and engines, so that the appropriate power generation target of the VCU is met.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides an electric automobile's range extender which characterized in that includes:

the engine oil cylinder assembly (1) comprises a first oil cylinder module (11) and a second oil cylinder module (12) which are arranged at intervals;

the generator assembly (2) comprises a first generator (21) and a second generator (22) which are arranged at intervals, and the first generator (21) and the second generator (22) are respectively connected with the first oil cylinder module (11) and the second oil cylinder module (12) through a transmission device (3);

the control module (4) is in signal connection with the engine oil cylinder assembly (1), the generator assembly (2) and the transmission device (3); wherein,

when the control module (4) receives the power requirement that the whole vehicle is lower than the target power, the control module (4) drives the transmission device (3) to disconnect the second generator (22) from the second oil cylinder module (12), and fuel injection ignition is performed on the first oil cylinder module (11) so as to drive the first generator (21) to generate power, and when the control module (4) receives the power requirement that the whole vehicle is higher than the preset target power, the control module (4) performs fuel injection ignition on the first oil cylinder module (11) and the second oil cylinder module (12) so as to enable the first generator (21) and the second generator (22) to generate power simultaneously.

2. Range extender as claimed in claim 1, characterized in that the transmission (3) comprises:

an output shaft provided in the engine cylinder assembly (1);

the clutch (31) is arranged between the first generator (21) and the second generator (22) and is connected with the output shaft, the clutch (31) is in signal connection with the control module (4), and the clutch (31) can drive the output shaft to be connected with or disconnected from the first generator (21) and the second generator (22) through suction or disconnection.

3. The range extender of claim 2, wherein the output shaft comprises:

the split type crankshaft (32) comprises a first crankshaft (321) and a second crankshaft (322) which can be connected with each other, and the first crankshaft (321) and the second crankshaft (322) are respectively arranged in the first oil cylinder module (11) and the second oil cylinder module (12);

the split crankshaft (32) is configured to: when the clutch (31) is in a suction state, the first crankshaft (321) is connected with the second crankshaft (322), the first generator (21) and the second generator (22) are connected with the first oil cylinder module (11) and the second oil cylinder module (12), and when the clutch (31) is in a disconnection state, the first generator (21) or the second generator (22) is disconnected with the engine oil cylinder assembly (1).

4. A range extender as claimed in claim 3 wherein:

the first oil cylinder module (11) comprises a first oil cylinder (111) and a second oil cylinder (112), the first oil cylinder (111) and the second oil cylinder (112) are connected with the first crankshaft (321), the first oil cylinder (111) and the second oil cylinder (112) are provided with spark plugs (5), and each spark plug (5) is connected with the control module (4) through signals;

the second oil cylinder module (12) comprises a third oil cylinder (121) and a fourth oil cylinder (122), the third oil cylinder (121) and the fourth oil cylinder (122) are connected with the second crankshaft (322), spark plugs (5) are arranged on the third oil cylinder (121) and the fourth oil cylinder (122), and each spark plug (5) is connected with the control module (4) through signals.

5. Range extender as claimed in claim 4, characterized in that the control module (4) comprises:

a generator controller in signal communication with the generator assembly (2);

a range extender controller in signal communication with the clutch (31);

an engine controller in signal communication with each of said spark plugs (5);

6. A control method using the range extender as claimed in any one of claims 1 to 5, comprising the steps of:

judging the power requirement of the whole vehicle by using a control module (4);

the engine oil cylinder assembly (1) and the generator assembly (2) are driven to operate through the control module (4); wherein,

when the power requirement of the whole vehicle is lower than the target power, the second generator (22) is driven to be disconnected with the second oil cylinder module (12) through the transmission device (3), the second oil cylinder module (12) is controlled to be closed, oil injection ignition is carried out on the first oil cylinder module (11), and the first generator (21) is enabled to output power generation until the power of the whole vehicle meets the power requirement of the whole vehicle;

when the power requirement of the whole vehicle is higher than the target power, the transmission device (3) drives the second generator (22) to be connected with the second oil cylinder module (12), oil injection ignition is carried out on the first oil cylinder module (11) and the second oil cylinder module (12), and the first generator (21) and the second generator (22) output power generation until the power requirement of the whole vehicle is met.

7. A control method according to claim 6, characterized in that said driving of said second generator (22) by means of a transmission (3) to disconnect from said second cylinder module (12) comprises:

-controlling the clutch (31) of the transmission (3) to be disconnected in order to disconnect the output shaft from the second generator (22).

8. A control method according to claim 7, characterized in that said driving of said second generator (22) by said transmission (3) is connected to said second cylinder module (12), comprising:

the clutch (31) is controlled to be engaged so as to connect a first crankshaft (321) and a second crankshaft (322) of the output shaft 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).

9. The control method according to claim 8, wherein the determining of the overall vehicle power demand using the control module (4) comprises:

10. The control method according to claim 9, characterized in that said igniting the fuel injection of the first cylinder module (11) and causing the first generator (21) to output the generated power includes:

the engine controller controls the spark plugs (5) on the third oil cylinder (121) and the fourth oil cylinder (122) to execute 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 for ignition;

the first generator (21) is driven to output the generated power with a preset target torque by a generator controller.