Parallel hybrid control method and system and engineering machinery

Abstract

The invention belongs to the technical field of hybrid power systems, and discloses a parallel hybrid power control method and system and engineering machinery, and the control method comprises the steps: carrying out the self-detection of a high-voltage power part of a complete machine; the electric quantity of the electric energy storage device meets the charging threshold; the whole machine works normally, and the total required power of the whole machine is obtained; controlling working modes of the generator motor according to the total demand power, wherein the working modes comprise a motor mode and a generator mode; the control system comprises an engine, a generator motor, an electric energy storage part and a power coupling device, the generator motor is electrically connected with the electric energy storage part, and the engine and the generator motor are connected with the power coupling device. The engineering machinery comprises the parallel hybrid control system. According to the parallel hybrid control method and system and the engineering machinery, the electric energy storage piece can be adaptively charged or discharged according to the actual working condition of the whole machine, and the efficiency of the whole machine and the fuel economy are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid systems, and in particular to a parallel hybrid control method, system and engineering machinery. Background Art

[0002] Under the background of increasingly serious pollution problems caused by construction machinery, the development of new energy for construction machinery is of great significance for energy conservation, emission reduction and sustainable development. As hybrid technology has excellent carbon emission and fuel consumption reduction capabilities, it has become an important way to improve the new energy of construction machinery.

[0003] In the prior art, most engineering machinery uses a series hybrid system. The three main energy systems of diesel engine, generator and electric motor are connected in series. The diesel engine drives the generator to generate electricity, which in turn drives the motor. The energy saving of the series hybrid system lies in its ability to maximize its efficiency, but the efficiency of the whole machine is low. In order to meet the needs of various actual working conditions, its power battery needs to be charged and discharged frequently, and the performance requirements of the motor and battery are high. In addition, the dynamic loss of the engine when starting and stopping during the operation of the system leads to an increase in the overall power loss of the system, a relatively low energy conversion efficiency, and poor fuel economy of the whole machine. Summary of the invention

[0004] The object of the present invention is to provide a parallel hybrid control method, system and engineering machinery, which can adaptively charge or discharge the energy storage element according to the actual working conditions of the whole machine, thereby effectively improving the efficiency and fuel economy of the whole machine.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A parallel hybrid control method comprises the following steps:

[0007] S100, self-test of high-voltage power components of the whole machine;

[0008] S200: The power of the electric energy storage element meets the charging threshold;

[0009] S300: The whole machine works normally, and the total power demand of the whole machine is obtained;

[0010] S400, controlling the working mode of the generator motor according to the total power demand, wherein the working mode of the generator motor includes a motor mode and a generator mode; wherein:

[0011] When in motor mode, the electrical energy storage element supplies power to the generator motor;

[0012] When in generator mode, the generator motor charges the electrical energy storage element.

[0013] Preferably, step S100 includes:

[0014] S110, low voltage power on the whole machine;

[0015] S120, self-check the high-voltage power components of the whole machine to determine whether the self-check of the whole machine is successful;

[0016] If yes, proceed to step S130; if no, the alarm device sounds an alarm;

[0017] S130, the whole machine is powered on with high voltage, and it is determined whether the high voltage power-on is successful;

[0018] If yes, proceed to step S140; if no, the alarm device sounds an alarm;

[0019] S140: The engine is started and the generator motor enters the enabled state.

[0020] Preferably, step S200 includes:

[0021] S210, determining whether the power level of the electric energy storage component is less than a charging threshold; wherein the charging threshold is a minimum power level of the electric energy storage component before the engineering machine enters a working mode;

[0022] If so, the generator motor is in generator mode, and the generator motor charges the electric energy storage element until the electric charge of the electric energy storage element is not less than a charging threshold.

[0023] If not, proceed to step S300.

[0024] Preferably, in step S210, after the generator motor charges the electric energy storage element, the following steps are further included:

[0025] S220, determining whether the charging time has exceeded;

[0026] If so, the generator motor stops working and the whole machine prompts charging timeout;

[0027] If not, the generator motor continues to be kept in the generator mode.

[0028] Preferably, step S400 includes:

[0029] S410, determining whether the total required power is greater than a switching threshold; wherein the switching threshold is a minimum power value required to be output when the construction machinery needs to switch to a heavy load mode;

[0030] If yes, proceed to step S420; if no, determine whether to switch to the light load mode according to the current power of the energy storage element;

[0031] S420, determining whether the power of the electric energy storage component is less than a lower limit threshold; wherein the lower limit threshold is the minimum power value of the electric energy storage component before the engineering machinery enters the heavy load mode;

[0032] If not, the generator motor is controlled to be in motor mode and the heavy load mode is started.

[0033] Preferably, if the judgment in step S420 is yes, the generator motor is controlled to be in generator mode, and the heavy load mode is not started.

[0034] Preferably, in step S410, judging whether to switch to the light load mode according to the current power of the electric energy storage component is specifically as follows;

[0035] S430, obtaining the current power of the electric energy storage component;

[0036] S440, determining whether the power of the energy storage component is less than an upper limit threshold; wherein the upper limit threshold is the maximum power value that the energy storage component itself can hold;

[0037] If so, the generator motor is in generator mode, and the generator motor charges the electric energy storage component until the electric power of the electric energy storage component is not less than an upper limit threshold.

[0038] Preferably, if the judgment in step S440 is no, the generator motor does not work.

[0039] A parallel hybrid control system, applying any of the parallel hybrid control methods described above, the parallel hybrid control system includes an engine, a generator motor, an electric energy storage element and a power coupling device, the generator motor is electrically connected to the electric energy storage element, and the engine and the generator motor are respectively connected to the power coupling device.

[0040] An engineering machine comprises the above-mentioned parallel hybrid control system. The engineering machine comprises a chassis, and the parallel hybrid control system is arranged on the chassis.

[0041] Beneficial effects:

[0042] The parallel hybrid control method provided by the present invention first self-checks the high-voltage power components of the whole machine to ensure that the high-voltage components of the whole machine can be successfully powered on at high voltage. Then ensure that the power of the energy storage device can meet the charging threshold, and ensure that there is enough power in the energy storage device before the engineering machinery enters the working mode. After the power confirmation is completed, the whole machine works normally, and the total power demand of the whole machine is obtained corresponding to different use conditions. The working mode of the generator motor is controlled according to the total power demand. Specifically, when the total power demand of the whole machine is large, the output power of the engine itself is insufficient to meet the requirements. At this time, the generator motor is in the motor mode, the energy storage device supplies power to the generator motor, and the generator motor outputs positive torque to the power coupling device, and participates in power output together with the engine. This mode corresponds to the heavy load mode; when the total power demand of the whole machine is small, the output power of the engine itself is sufficient to meet the requirements. At this time, the generator motor is in the generator mode, and the generator motor outputs negative torque, generates electric energy and transmits it to the energy storage device to charge the energy storage device. The above method can adaptively charge or discharge the energy storage device according to different operating conditions and application scenarios by determining the power demand of the whole machine, effectively improving the efficiency of the whole machine and fuel economy.

[0043] The parallel hybrid control system provided by the present invention applies the above-mentioned parallel hybrid control method, and can adaptively charge or discharge the electric energy storage element according to the actual working conditions of the whole machine, thereby effectively improving the efficiency and fuel economy of the whole machine.

[0044] The engineering machinery provided by the present invention includes the above-mentioned parallel hybrid control system, which can adaptively charge or discharge the electric energy storage element according to the actual working conditions of the whole machine, thereby effectively improving the efficiency and fuel economy of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a flow chart of the parallel hybrid control method provided by the present invention;

[0046] Figure 2 It is a specific flow chart of the parallel hybrid control method provided by the present invention;

[0047] Figure 3 It is a schematic diagram of the parallel hybrid control system provided by the present invention.

[0048] In the figure:

[0049] 1. Engine; 2. Generator motor; 3. Energy storage device; 4. Power coupling device. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] This embodiment provides a parallel hybrid control method. Figures 1 to 3 As shown, the parallel hybrid control method mainly includes the following steps:

[0055] S100, self-test of high-voltage power components of the whole machine;

[0056] S200: The power level of the energy storage element 3 meets the charging threshold;

[0057] S300: The whole machine works normally, and the total power demand of the whole machine is obtained;

[0058] S400. Control the working mode of the generator motor 2 according to the total power demand. The working modes of the generator motor 2 include the motor mode and the generator mode. When in the motor mode, the energy storage device 3 supplies power to the generator motor 2. When in the generator mode, the generator motor 2 charges the energy storage device 3.

[0059] In this embodiment, the method first performs a self-test on the high-voltage power components of the whole machine to ensure that the high-voltage components of the whole machine can be successfully powered on at high voltage. Then, it is ensured that the power of the energy storage component 3 can meet the charging threshold, and that there is enough power in the energy storage component 3 before the engineering machinery enters the working mode. After the power confirmation is completed, the whole machine works normally, and the total power demand of the whole machine is obtained corresponding to different operating conditions. The working mode of the generator motor 2 is controlled according to the total power demand. Specifically, when the total power demand of the whole machine is large, the output power of the engine 1 itself is insufficient to meet the requirements. At this time, the generator motor 2 is in the motor mode, the energy storage component 3 supplies power to the generator motor 2, and the generator motor 2 outputs positive torque to the power coupling device 4, and participates in power output together with the engine 1. This mode corresponds to the heavy load mode; when the total power demand of the whole machine is small, the output power of the engine 1 itself is sufficient to meet the requirements. At this time, the generator motor 2 is in the generator mode, and the generator motor 2 outputs negative torque, generates electric energy and transmits it to the energy storage component 3 to charge the energy storage component 3. The above method can determine the power demand of the whole machine according to different operating conditions and application scenarios, and adaptively charge or discharge the energy storage element 3, thereby effectively improving the efficiency and fuel economy of the whole machine.

[0060] In this embodiment, the electric energy storage element 3 can be configured as a power battery or a super capacitor, which is not limited here.

[0061] In this embodiment, step S100 includes:

[0062] S110, low voltage power on the whole machine;

[0063] S120, self-check the high-voltage power components of the whole machine to determine whether the self-check of the whole machine is successful;

[0064] If yes, proceed to step S130; if no, the alarm device sounds an alarm;

[0065] S130, the whole machine is powered on with high voltage, and it is determined whether the high voltage power-on is successful;

[0066] If yes, proceed to step S140; if no, the alarm device sounds an alarm;

[0067] S140: The engine 1 is started, and the generator motor 2 enters an enabled state.

[0068] Specifically, the whole machine is first powered on at low voltage. After the low voltage is powered on, the high voltage electrical components of the whole vehicle are self-checked to ensure that each high voltage electrical component is fault-free. After the self-check of the high voltage electrical components of the whole machine is successful, the whole machine is powered on at high voltage, and the voltage, current and other electrical signal data of each internal high voltage electrical component are used to reflect whether the high voltage power-on is successful. It is worth mentioning that if some components fail to self-check during the self-check of the high voltage electrical components, it indicates that the self-check of the whole vehicle is unsuccessful, and the alarm device alarms, prompting the operator to perform fault inspection and repair on the high voltage electrical components inside the construction machinery. If some components fail to power on during the high voltage power-on process, that is, the voltage, current and other electrical signal data corresponding to these high voltage electrical components are abnormal, it indicates that the high voltage power-on of the whole machine has failed, and the alarm device alarms, prompting the operator to perform fault inspection and repair on the high voltage electrical components inside the construction machinery.

[0069] Optionally, the alarm device can be configured as a display light installed in the cab of the engineering machinery. When an alarm is sounded, the display light can perform actions such as lighting up, changing color, and flashing.

[0070] Optionally, the alarm device can be set as a buzzer. When an alarm occurs, the buzzer sounds to promptly remind the operator.

[0071] In this embodiment, step S200 includes:

[0072] S210, determining whether the power of the energy storage element 3 is less than a charging threshold; wherein the charging threshold is a minimum power value of the energy storage element 3 before the engineering machine enters the working mode;

[0073] If yes, the generator motor 2 is in the generator mode, and the generator motor 2 charges the electric energy storage element 3 until the electric quantity of the electric energy storage element 3 is not less than the charging threshold;

[0074] If not, proceed to step S300.

[0075] Specifically, before the whole machine works normally, it is necessary to confirm the remaining power in the energy storage component 3. Ensure that the power of the energy storage component 3 can meet the charging threshold, and ensure that there is enough power in the energy storage component 3 before the engineering machinery enters the working mode. Specifically, if the power of the energy storage component 3 is not less than the charging threshold, the engineering machinery can work normally directly; if the power of the energy storage component 3 is less than the charging threshold, before the whole machine works normally, the generator motor 2 must be driven to work, so that the generator motor 2 is in the generator mode to charge the energy storage component 3 until the power in the energy storage component 3 is not less than the charging threshold and meets the power requirement.

[0076] In this embodiment, in step S210, after the generator motor 2 charges the electric energy storage element 3, the following steps are also included:

[0077] S220, determining whether the charging time has exceeded;

[0078] If yes, the generator motor 2 stops working and the whole machine prompts that the charging is overtime; if no, the generator motor 2 continues to be kept in the generator mode.

[0079] Specifically, judging the charging progress of the energy storage component 3 can be achieved by judging the charging time. Specifically, when the charging time reaches the threshold time, it can be indicated that the power of the energy storage component 3 has been charged to a state not less than the charging threshold. This state can be a power level that exceeds the charging threshold, or it can be that the energy storage component 3 is fully charged. If charging continues, it indicates that the charging time has timed out, and the generator motor 2 stops working and stops charging the energy storage component 3. The whole machine prompt can be achieved through the indicator light on the display screen in the cab, etc., so as to provide timely prompts to the operator to ensure that the construction machinery can enter a normal working state.

[0080] In step S300, the total power demand of the whole machine can be realized by calling the preset values ​​corresponding to different working conditions in the controller. Specifically, when the engineering machinery is set as an excavator, different preset working conditions can be preset in the whole machine controller, such as excavating mud and sand, excavating hard soil, excavating soft soil, etc., which correspond to different powers applied to the load ends such as the excavator boom, dipper arm and bucket. Therefore, different preset values ​​of the total power demand can be preset in the whole machine controller in advance, and when the actual working condition matches the corresponding preset working condition, the corresponding total power demand value is called.

[0081] In this embodiment, step S400 includes:

[0082] S410, determining whether the total required power is greater than a switching threshold; wherein the switching threshold is a minimum power value required to be output when the construction machinery needs to switch to a heavy load mode;

[0083] If yes, proceed to step S420; if no, determine whether to switch to the light load mode according to the current power of the energy storage element 3;

[0084] S420, determining whether the power of the energy storage unit 3 is less than a lower limit threshold; wherein the lower limit threshold is the minimum power value of the energy storage unit 3 before the engineering machine enters the heavy load mode;

[0085] If not, the generator motor 2 is controlled to be in motor mode and the heavy load mode is started.

[0086] Specifically, there is a switching threshold corresponding to the total power demand, and the switching threshold is a threshold that indicates whether the engineering machinery enters the heavy load mode. Specifically, when the total power demand is greater than the switching threshold, it means that the engine 1 alone cannot provide enough power to the load end at this time, and there is a need for the generator motor 2 as a power output source. At this time, the power of the energy storage component 3 is further judged to determine whether the power of the energy storage component 3 is less than the lower limit threshold. If the power of the energy storage component 3 is not less than the lower limit threshold, the generator motor 2 is controlled to be in the motor mode, the generator motor 2 outputs positive torque, the heavy load mode is started, the energy storage component 3 supplies power to the generator motor 2, and the generator motor 2 outputs positive torque to the power coupling device 4, and participates in power output together with the engine 1. When the total power demand is not greater than the switching threshold, it means that the engine 1 alone can provide enough power to the load end at this time. At this time, it is determined whether to switch to the light load mode according to the current power of the energy storage component 3, that is, whether it is necessary to charge the energy storage component 3 by the generator motor 2 working in the generator mode.

[0087] Further, if the judgment in step S420 is yes, the generator motor 2 is controlled to be in generator mode, and the heavy load mode is not started. Specifically, when it is judged that the power of the energy storage component 3 is less than the lower limit threshold, the power of the energy storage component 3 is not enough to support the long-term power supply to the generator motor 2, so the heavy load mode cannot be started at this time. And at this time, the generator motor 2 can be directly controlled to be in generator mode, the generator motor 2 outputs negative torque, and the generator motor 2 charges the energy storage component 3 in time to ensure that the power in the energy storage component 3 can be replenished in time to exceed the lower limit threshold. When the power in the energy storage component 3 exceeds the lower limit threshold, the generator motor 2 can be controlled to change to the motor mode, the generator motor 2 changes to output positive torque, and then the heavy load mode is started. This situation is equivalent to delaying the start of the heavy load mode.

[0088] In this embodiment, in step S410, judging whether to switch to the light load mode according to the current power of the electric energy storage element 3 is as follows;

[0089] S430, obtaining the current power of the electric energy storage element 3;

[0090] S440, determining whether the power of the energy storage element 3 is less than an upper limit threshold; wherein the upper limit threshold is the maximum power value that the energy storage element 3 can hold;

[0091] If so, the generator motor 2 is in the generator mode, and the generator motor 2 charges the energy storage element 3 until the power level of the energy storage element 3 is not less than the upper limit threshold.

[0092] Specifically, when the total required power is not greater than the switching threshold, the generator motor 2 is controlled to determine whether it needs to work according to the power of the energy storage device 3. The current power of the energy storage device 3 is obtained through a sensing component such as a power sensor, and the power of the energy storage device 3 is further compared with the upper limit threshold. If the power in the energy storage device 3 is still less than the upper limit threshold, the generator motor 2 is in the generator mode, and the generator motor 2 outputs negative torque to charge the energy storage device 3 until the power of the energy storage device 3 is not less than the upper limit threshold.

[0093] Furthermore, if the judgment in step S440 is no, the generator motor 2 does not work. Specifically, if the power in the power storage unit 3 has reached the upper limit threshold, it means that the power in the power storage unit 3 is full and can no longer be charged, and the generator motor 2 does not need to participate in the power coupling work, then the generator motor 2 does not need to work.

[0094] This embodiment also provides a parallel hybrid control system. The parallel hybrid control system applies the above-mentioned parallel hybrid control method. The parallel hybrid control system includes an engine 1, a generator motor 2, an electric energy storage component 3 and a power coupling device 4. The generator motor 2 is electrically connected to the electric energy storage component 3, and the engine 1 and the generator motor 2 are respectively connected to the power coupling device 4. The parallel hybrid control system provided in this embodiment applies the above-mentioned parallel hybrid control method, and can adaptively charge or discharge the electric energy storage component 3 according to the actual working conditions of the whole machine, effectively improving the efficiency and fuel economy of the whole machine.

[0095] This embodiment also provides an engineering machine. The engineering machine includes the above-mentioned parallel hybrid control system, which can adaptively charge or discharge the electric energy storage element 3 according to the actual working conditions of the whole machine, effectively improving the efficiency and fuel economy of the whole machine.

[0096] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A parallel hybrid control method, characterized in that: The following steps are involved: S100, self-test of high-voltage power components of the whole machine; S200, the power level of the electric energy storage element (3) meets the charging threshold; S300: The whole machine works normally, and the total power demand of the whole machine is obtained; S400, controlling the working mode of the generator motor (2) according to the total required power, the working mode of the generator motor (2) including a motor mode and a generator mode; wherein: When in motor mode, the electric energy storage element (3) supplies power to the generator motor (2); When in generator mode, the generator motor (2) charges the electrical energy storage element (3).

2. The parallel hybrid control method according to claim 1, characterized in that: Step S100 includes: S110, low voltage power on the whole machine; S120, self-check the high-voltage power components of the whole machine to determine whether the self-check of the whole machine is successful; If yes, proceed to step S130; if no, the alarm device sounds an alarm; S130, the whole machine is powered on with high voltage, and it is determined whether the high voltage power-on is successful; If yes, proceed to step S140; if no, the alarm device sounds an alarm; S140: The engine (1) is started and the generator motor (2) enters an enabled state.

3. The parallel hybrid control method according to claim 1, characterized in that: Step S200 includes: S210, determining whether the power level of the electric energy storage element (3) is less than a charging threshold; wherein the charging threshold is a minimum power level of the electric energy storage element (3) before the engineering machine enters a working mode; If so, the generator motor (2) is in generator mode, and the generator motor (2) charges the electric energy storage element (3) until the electric power of the electric energy storage element (3) is not less than a charging threshold; If not, proceed to step S300.

4. The parallel hybrid control method according to claim 3, characterized in that: In step S210, after the generator motor (2) charges the electric energy storage element (3), the following steps are also included: S220, determining whether the charging time has exceeded; If so, the generator motor (2) stops working and the whole machine prompts that charging has timed out; If not, the generator motor (2) continues to be kept in the generator mode.

5. The parallel hybrid control method according to claim 1, characterized in that: Step S400 includes: S410, determining whether the total required power is greater than a switching threshold; wherein the switching threshold is a minimum power value required to be output when the construction machinery needs to switch to a heavy load mode; If yes, proceed to step S420; if no, determine whether to switch to the light load mode according to the current power level of the electric energy storage element (3); S420, determining whether the power level of the electric energy storage element (3) is less than a lower limit threshold; wherein the lower limit threshold is the minimum power level of the electric energy storage element (3) before the engineering machinery enters the heavy load mode; If not, the generator motor (2) is controlled to be in motor mode, and the heavy load mode is started.

6. The parallel hybrid control method according to claim 5, characterized in that: If the judgment in step S420 is yes, the generator motor (2) is controlled to be in generator mode, and the heavy load mode is not started.

7. The parallel hybrid control method according to claim 5, characterized in that: In step S410, judging whether to switch to the light load mode according to the current power level of the electric energy storage element (3) is as follows: S430, obtaining the current power level of the electric energy storage element (3); S440, determining whether the amount of electricity in the electric energy storage element (3) is less than an upper threshold value; wherein the upper threshold value is the maximum amount of electricity that the electric energy storage element (3) can hold; If so, the generator motor (2) is in generator mode, and the generator motor (2) charges the electric energy storage element (3) until the electric power of the electric energy storage element (3) is not less than an upper limit threshold.

8. The parallel hybrid control method according to claim 7, characterized in that: If the answer in step S440 is no, the generator motor (2) does not operate.

9. A parallel hybrid control system, characterized in that: A parallel hybrid control method according to any one of claims 1 to 8 is applied, wherein the parallel hybrid control system comprises an engine (1), a generator motor (2), an electric energy storage element (3) and a power coupling device (4), wherein the generator motor (2) is electrically connected to the electric energy storage element (3), and the engine (1) and the generator motor (2) are respectively connected to the power coupling device (4).

10. An engineering machine, characterized in that: Including the parallel hybrid control system according to claim 9, the engineering machinery includes a chassis, and the parallel hybrid control system is arranged on the chassis.

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