Hybrid power system

Abstract

To provide a hybrid power system capable of switching to a hybrid power mode or a pure electric mode according to different use scenarios, and improving energy conversion and transmission efficiency.SOLUTION: The first motor is connected to the engine, the power distributor is connected to the first motor, and the second motor is connected to the power distributor. The electric energy controller is coupled to the first motor and the second motor, and the energy storage module is coupled to the electric energy controller. The transmission mechanism is connected to the power distributor, and the wheels are connected to the transmission mechanism. The engine drives the first motor to rotate forwardly, and drives the second motor to rotate reversely via the power distributor, and at the same time, the engine is adapted to drive the wheels via the power distributor and the transmission mechanism. The energy storage module is adapted to synchronously start the first motor and the second motor via the electric energy controller and drive the wheels via the power distributor and the transmission mechanism.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to power systems, and more particularly to hybrid power systems with multiple power modes. [Background technology]

[0002] As environmental awareness increases, the consumer market is beginning to pay more attention to the environmental performance of automobiles. Electric vehicles, which are rapidly growing today, are seen as an important means of achieving environmentally friendly transportation. However, due to limitations in battery technology development, conventional electric vehicles still suffer from insufficient driving range and long battery charging times, which remain the biggest obstacles to the development of electric vehicles at this stage. Therefore, hybrid-powered vehicles are also being developed. This is because hybrid-powered vehicles have a longer driving range than electric vehicles and are more environmentally friendly than fuel-powered vehicles, and therefore may serve as a transitional product to electric vehicles until electric vehicles are fully adopted.

[0003] However, conventional hybrid power vehicles are characterized by their complex power systems. This is because the hybrid power system includes multiple transmission modules, such as a fuel engine, an electric motor, and a gearbox connecting the two. Energy loss occurs when transmitting power between each transmission module, which reduces the transmission efficiency of the conventional hybrid power system and increases fuel and electrical energy consumption. Therefore, improving the energy conversion and transmission efficiency of conventional hybrid power systems has become an important development goal. Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional hybrid power vehicles are characterized by their complex power systems. This is because the hybrid power system includes multiple transmission modules, such as a fuel engine, an electric motor, and a gearbox connecting the two. Energy losses occur when transmitting power between each transmission module, which reduces the transmission efficiency of the conventional hybrid power system and increases fuel and electrical energy consumption. Therefore, improving the energy conversion and transmission efficiency of conventional hybrid power systems has become an important development goal. [Means for solving the problem]

[0005] The present invention provides a hybrid power system that can switch between hybrid power mode or pure electric mode according to different usage scenarios, thereby improving energy conversion and transmission efficiency.

[0006] The hybrid power system of the present invention includes an engine, a first motor, a power splitter, a second motor, an electric energy controller, an energy storage module, a transmission mechanism, and wheels. The first motor is connected to the engine. The power splitter is connected to the first motor. The second motor is connected to the power splitter. The electric energy controller is coupled to the first motor and the second motor. The energy storage module is coupled to the electric energy controller. The transmission mechanism is connected to the power splitter. The wheels are connected to the transmission mechanism. The engine is adapted to drive the first motor to rotate in a forward direction and drive the second motor via the power splitter to rotate in a reverse direction, and simultaneously, the engine is adapted to drive the wheels via the power splitter and the transmission mechanism. The energy storage module is adapted to synchronously start the first motor and the second motor via the electric energy controller and drive the wheels via the power splitter and the transmission mechanism.

[0007] In one embodiment of the present invention, the power distributor has a reduction gear, a ring gear, a planetary gear set and a sun gear, the reduction gear is connected to a first motor, the outer teeth of the ring gear mesh with the reduction gear, the planetary gear set mesh with the inner teeth of the ring gear, and the sun gear is connected to a second motor and meshes with the planetary gear set.

[0008] In one embodiment of the present invention, the transmission further includes a clutch disposed between the sun gear and the planetary gear set.

[0009] In one embodiment of the present invention, the vehicle further includes a first gear and a second gear, the first gear being connected to the engine, the second gear being connected to the first motor and meshing with the first gear, and the engine being adapted to rotationally drive the second gear and the reduction gear via the first gear.

[0010] In one embodiment of the present invention, the transmission mechanism includes a first transmission gear, a second transmission gear, a third transmission gear, a fourth transmission gear, and a chain, wherein the first transmission gear is fixedly connected to the planetary gear set, the second transmission gear is adjacent to the first transmission gear, the third transmission gear is coaxially connected to the second transmission gear, the fourth transmission gear is coaxially connected to the wheel, the fourth transmission gear meshes with the third transmission gear, and the chain is sleeved on the first transmission gear and the second transmission gear.

[0011] In one embodiment of the present invention, in a pure electric mode, the clutch fixes the sun gear and the planetary gear set to form a rigid body, the energy storage module generates first electrical energy and provides it to the first motor and the second motor via the electrical energy controller, the first motor generates first mechanical energy to rotate the ring gear via the reduction gear, and the second motor generates second mechanical energy to rotate the sun gear and the planetary gear set.

[0012] In one embodiment of the present invention, the first mechanical energy and the second mechanical energy are transmitted to a transmission mechanism via a power distributor, and the transmission mechanism drives the wheels to rotate.

[0013] In one embodiment of the present invention, in hybrid power mode, the clutch separates the sun gear and the planetary gear set, the engine generates third mechanical energy, a portion of the third mechanical energy drives the first motor to rotate in the forward direction and generate second electrical energy, and another portion of the third mechanical energy is transmitted to the transmission mechanism via the reduction gear, ring gear and planetary gear set, and simultaneously the planetary gear set drives the driving sun gear to rotate the second motor in the reverse direction.

[0014] In one embodiment of the present invention, the third mechanical energy is transmitted to a transmission mechanism via a power distributor, and the transmission mechanism drives the wheels to rotate.

[0015] In one embodiment of the present invention, the electrical energy controller provides the second electrical energy to the second motor to drive the second motor in reverse to form the fourth mechanical energy, and the power distributor forms the differential rotation. [Effects of the Invention]

[0016] Based on the above, the hybrid power system of the present invention is adapted for motorcycles, automobiles, or other types of vehicles, and the hybrid power system combines power sources such as an engine, a first motor, a second motor, and an energy storage module. The present invention can switch between a hybrid power mode or a pure electric mode according to different driving scenarios or terrains, and correspondingly turn on or off the engine, the first motor, the second motor, and the energy storage module to reduce energy consumption and thereby improve the mileage of the vehicle. In short, the hybrid power system can switch between the hybrid power mode and the pure electric mode according to various situations to achieve power usage within the optimal efficiency range.

[0017] More specifically, the hybrid power system of the present invention can achieve the purpose of switching between hybrid power mode and pure electric mode simply by changing the state of the clutch (locked or unlocked). Compared to conventional hybrid power systems that use multiple transmission components, the switching procedure is significantly simplified and the structure is simple. At the same time, the switching process between different modes is stress-free, improving driving comfort and safety. [Brief explanation of the drawings]

[0018] [Figure 1A] 1 is a block diagram of a hybrid power system according to an embodiment of the present invention; [Figure 1B] FIG. 1B is a structural connection schematic diagram of the hybrid power system of FIG. 1A. [Figure 1C] 1B is a diagram showing the relationship between the rotational speeds of the engine, the first motor, and the second motor of the hybrid power system of FIG. 1A. FIG. [Figure 2A] FIG. 2 is a block schematic diagram of power transmission in a pure electric mode of the hybrid power system of FIGS. 1A and 1B. [Figure 2B] FIG. 2B is a diagram showing the relationship between the rotational speeds of the engine, the first motor, and the second motor of FIG. 2A. [Figure 3A] FIG. 2 is a block schematic diagram of power transmission in a hybrid power mode of the hybrid power system of FIGS. 1A and 1B. [Figure 3B] FIG. 3B is a diagram showing the relationship between the rotational speeds of the engine, the first motor, and the second motor of FIG. 3A. [Figure 4] FIG. 2 is a schematic diagram of a mode switching rule for the hybrid power system of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0019] Fig. 1A is a block diagram of a hybrid power system according to an embodiment of the present invention, Fig. 1B is a structural connection diagram of the hybrid power system of Fig. 1A, and Fig. 1C is a diagram showing the relationship between the rotational speeds of an engine, a first motor, and a second motor of the hybrid power system of Fig. 1A.

[0020] As shown in FIGS. 1A-1C, the hybrid power system 100 of the present invention is adapted for use in a motorcycle, automobile, or other type of vehicle, and includes an engine 110, a first motor 120, a power distributor 130, a second motor 140, an electric energy controller 150, an energy storage module 160, a transmission 170, and wheels 180.

[0021] The engine 110 is disposed in the vehicle and utilizes fuel as an energy source. The first motor 120 is connected to the engine 110. Specifically, the engine 110 is connected in parallel to the first motor 120. When the engine 110 is running, it drives the first motor 120 to switch to generator mode and generate electrical energy. The power splitter 130 is connected to the first motor 120. The second motor 140 is connected to the power splitter 130. The electrical energy controller 150 is coupled to the first motor 120 and the second motor 140. The energy storage module 160 is coupled to the electrical energy controller 150, and electrical energy from the energy storage module 160 is supplied to the first motor 120 and / or the second motor 140 via the electrical energy controller 150. The transmission mechanism 170 is connected to the power splitter 130, and the wheels 180 are connected to the transmission mechanism 170.

[0022] The power distributor 130 is adapted to transmit power generated by the engine 110, the first motor 120, and the second motor 140 to the transmission mechanism 170, which ultimately drives the wheels 180 to rotate.

[0023] 1A and 1B, an engine 110 drives a first motor 120 to rotate in a forward direction and drives a second motor 140 to rotate in a reverse direction via a power splitter 130. At the same time, the engine 110 is adapted to drive wheels 180 via the power splitter 130 and a transmission mechanism 170. An energy storage module 160 is adapted to synchronously start the first motor 120 and the second motor 140 via an electric energy controller 150 to drive the wheels 180 via the power splitter 130 and a transmission mechanism 170.

[0024] 1B, the power distributor 130 includes a reduction gear 131, a ring gear 132, a planetary gear set 133, and a sun gear 134. The reduction gear 131 is connected to the shaft of the first motor 120, the external teeth of the ring gear 132 mesh with the reduction gear 131, the planetary gear set 133 meshes with the internal teeth of the ring gear 132, and the sun gear 134 is connected to the shaft of the second motor 140 and meshes with the planetary gear set 133.

[0025] The hybrid power system 100 includes a first gear R1 and a second gear R2, where the first gear R1 is connected to a shaft of the engine 110, and the second gear R2 is connected to a shaft of the first motor 120 and meshes with the first gear R1. Therefore, power generated by the rotation of the engine 110 can be transmitted to the second gear R2 via the first gear R1, that is, the engine 110 is adapted to rotate and drive the second gear R2 and the reduction gear 131 via the first gear R1.

[0026] According to the above, the engine 110 and the first motor 120 mesh with the external teeth of the ring gear 132 through the reduction gear 131 to function as a power input terminal, the first motor 120 meshes with the planetary gear set 133 through the sun gear 134, the power output terminal of the power distributor 130 is the planetary gear set 133, the planetary gear set 133 transmits the power to the wheels 180 through the transmission mechanism 170 with an appropriate reduction ratio, the wheels 180 rotate according to the corresponding speed and have corresponding torque, adapting to different scenarios.

[0027] 1A and 1B, the power of the engine 110, the first motor 120, and the second motor 140 is all transmitted to wheels 180 via a power distributor 130 and a transmission mechanism 170. Because the engine 110, the first motor 120, and the second motor 140 share the same transmission mechanism 170, the hybrid power system 100 has the advantage of being simple in structure.

[0028] The transmission mechanism 170 includes a first transmission gear 171, a second transmission gear 172, a third transmission gear 173, a fourth transmission gear 174, and a chain 175. The first transmission gear 171 is fixedly connected to the planetary gear set 133, the second transmission gear 172 is adjacent to the first transmission gear 171, the third transmission gear 173 is coaxially connected to the second transmission gear 172, the fourth transmission gear 174 is coaxially connected to the wheel 180, the fourth transmission gear 174 meshes with the third transmission gear 173, and the chain 175 is sleeved around the first transmission gear 171 and the second transmission gear 172.

[0029] Additionally, the power transmission path of the engine 110, the first motor 120, and the second motor 140 is, in order, the power distributor 130, the first transmission gear 171, the chain 175, the second transmission gear 172, the third transmission gear 173, and the fourth transmission gear 174, and is finally transmitted to the wheels 180.

[0030] The hybrid power system 100 further includes a clutch 190 disposed between the sun gear 134 and the planetary gear set 133. When the clutch 190 is in an unlocked state, the sun gear 134 and the planetary gear set 133 are two independent members, i.e., the sun gear 134 and the planetary gear set 133 are suitable for relative rotation. When the clutch 190 is in a locked state, the sun gear 134 and the planetary gear set 133 are integrally connected and rotate synchronously. The multiple power sources of the present invention change the operating state of the power splitter 130 through a switch in the clutch 190, thereby simplifying the switching process of the hybrid power system 100 for different usage modes.

[0031]

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[0032]

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[0033]

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[0034] Figure 2A is a block schematic diagram of power transmission in a pure electric mode of the hybrid power system of Figures 1A and 1B. Figure 2B is a diagram showing the relationship between the rotational speeds of the engine, first motor, and second motor of Figure 2A. Figure 3A is a block schematic diagram of power transmission in a hybrid power mode of the hybrid power system of Figures 1A and 1B. Figure 3B is a diagram showing the relationship between the rotational speeds of the engine, first motor, and second motor of Figure 3A. Figure 4 is a schematic diagram of mode switching rules for the hybrid power system of Figure 1.

[0035] 2A and 3A, in brief, the hybrid power system of the present invention has an architecture enhanced with two modes, such as a pure electric mode (driven by the first motor 120 and the second motor 140) and a hybrid power mode (engine 110, the first motor 120, and the second motor 140). The pure electric mode and the hybrid power mode will be described in detail below.

[0036] 1B and 2A , when the hybrid power system 100 is in the pure electric mode, the engine 110 does not start, the clutch 190 locks the sun gear 134 and the planetary gear set 133 to form a rigid body, the energy storage module 160 generates a first electric energy E1 and provides it to the first motor 120 and the second motor 140 via the electric energy controller 150, and the first motor 120 generates a first mechanical energy M1 to rotate the external teeth of the ring gear 132 via the reduction gear 131. The internal teeth of the ring gear 132 then rotate the planetary gear set 133 and transmit the first mechanical energy M1 to the transmission mechanism 170. At the same time, the second motor 140 generates a second mechanical energy M2 to rotate the sun gear 134 and the planetary gear set 133 and transmit the second mechanical energy M2 to the transmission mechanism 170.

[0037] Therefore, in the pure electric mode, the first mechanical energy M1 and the second mechanical energy M2 are transmitted to the transmission mechanism 170 via the power splitter 130, and the transmission mechanism 170 drives the wheels 180 to rotate.

[0038]

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[0039] 4, the pure electric mode is suitable for scenarios where the vehicle is starting, accelerating, and traveling at medium or low speeds, and can avoid the engine 110 from starting from a standstill and consuming fuel because fuel consumption is relatively high from a standstill to medium or low speeds. In addition, in the pure electric mode, the first motor 120 and the second motor 140 simultaneously provide power, providing the vehicle with excellent acceleration and hill-climbing characteristics when starting at low speeds.

[0040] 1B and 3A, in the hybrid power mode, the clutch 190 separates the sun gear 134 from the planetary gear set 133, the engine 110 generates third mechanical energy M3, a portion of the third mechanical energy M3 drives the first motor 120 to rotate in the forward direction and generate second electrical energy E2, and another portion of the third mechanical energy M3 is transmitted through the reduction gear 131, the ring gear 132, and the planetary gear set 133 to the transmission mechanism 170. At the same time, the planetary gear set 133 drives the sun gear 134 to rotate the second motor 140 in the reverse direction.

[0041] Referring to FIG. 3A, in the hybrid power mode, the third mechanical energy M3 is transmitted to the transmission mechanism 170 via the power splitter 130, and the transmission mechanism 170 drives the wheels 180 to rotate.

[0042] In detail, when the clutch 190 is in an unlocked state, the sun gear 134 connected to the second motor 140 is unlocked from the clutch 190 and rotates in the reverse direction relative to the planetary gear set 133, thereby changing the rotational speed of the second motor 140, thereby forming an operation mode of an output-split type electronic continuously variable transmission (E-CVT) that adjusts the rotational speed of the engine 110. The so-called E-CVT refers to the use of a motor (generator) to control the operating point of the engine and realize the operation of a continuously variable reduction ratio (electronic continuously variable transmission) between the engine and the wheels.

[0043] Briefly, in the hybrid power mode, the engine 110 starts to output driving torque, the second motor 140 changes torque direction, and the clutch 190 between the sun gear 134 and the planetary gear set 133 is unlocked. The second motor 140 is driven by the planetary gear set 133, and the electric energy controller 150 provides the second electric energy E2 to the second motor 140, driving the second motor 140 to rotate in reverse, generating the fourth mechanical energy M4, and the power distributor 130 generating differential rotation. Referring also to FIG. 3B , the torque and rotational speed relationships of the engine 110, first motor 120, and second motor 140 are as follows:

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[0044] 4, the hybrid power mode is applicable to low-speed cruising, rapid acceleration, and high-speed cruising. In the hybrid power mode, the rotational speed and operating point of the regulated engine 110 are adjusted through the reverse rotation function of the second motor 140, thereby realizing energy-saving and speed-changing functions. More specifically, in the hybrid power mode, the first motor 120 generates second electrical energy E2 in generator mode, supplies power to the second motor 140 to reverse it, and forms fourth mechanical energy M4, thereby forming a load that continuously changes the rotational speed of the engine 110 and the torque of the wheels 180.

[0045] In summary, the hybrid power system of the present invention is adapted for motorcycles, automobiles, or other types of vehicles, and the hybrid power system combines power sources such as an engine, a first motor, a second motor, and an energy storage module. The present invention can switch between hybrid power mode or pure electric mode according to different driving scenarios or terrains, and correspondingly turn on or off the engine, first motor, second motor, and energy storage module to reduce energy consumption and thereby improve the vehicle's mileage. In short, the hybrid power system can switch between hybrid power mode and pure electric mode according to various situations to achieve power usage within the optimal efficiency range.

[0046] More specifically, the hybrid power system of the present invention can achieve the purpose of switching between hybrid power mode and pure electric mode simply by changing the state of the clutch (locked or unlocked). Compared to conventional hybrid power systems that use multiple transmission components, the switching procedure is significantly simplified and the structure is simple. At the same time, the switching process between different modes is stress-free, improving driving comfort and safety. [Industrial Applicability]

[0047] The power system can be applied to hybrid powered vehicle applications. [Explanation of symbols]

[0048] 100: Hybrid power system 110: Engine 120: First motor 130: Power divider 131: Reduction gear 132: Ring gear 133: Planetary gear set 134: Sun Gear 140: Second motor 150: Electrical energy controller 160: Energy storage module 170: Transmission mechanism 171: First transmission gear 172: Second transmission gear 173: Third transmission gear 174: 4th transmission gear 175: Chain 180:wheel 190: Clutch R1: First gear R2: Second gear M1: First mechanical energy M2: Second mechanical energy M3: Third mechanical energy M4: Fourth Mechanical Energy E1: First electric energy E2: Second electric energy

Claims

1. The engine and a first motor connected to the engine; a power distributor connected to the first motor; a second motor connected to the power distributor; an electrical energy controller coupling the first motor and the second motor; an energy storage module coupled to the electrical energy controller; a transmission mechanism connected to the power distributor; a wheel connected to the transmission mechanism; Equipped with the engine is adapted to drive the first motor in a forward direction and drive the second motor in a reverse direction via the power splitter, and simultaneously drive the wheels via the power splitter and the transmission mechanism; the energy storage module is adapted to synchronously start the first motor and the second motor via the electric energy controller to drive the wheels via the power splitter and the transmission mechanism; Hybrid power system.

2. the power splitter includes a reduction gear, a ring gear, a planetary gear set, and a sun gear; the reduction gear is connected to the first motor; The external teeth of the ring gear mesh with the reduction gear; the planetary gear set meshes with the internal teeth of the ring gear; the sun gear is connected to the second motor and meshes with the planetary gear set; 10. The hybrid power system of claim 1.

3. further comprising a clutch disposed between the sun gear and the planetary gear set.

3. The hybrid power system of claim 2.

4. further including a first gear and a second gear; the first gear is connected to the engine; the second gear is connected to the first motor and meshes with the first gear; the engine is adapted to rotatably drive the second gear and the reduction gear via the first gear; 3. The hybrid power system of claim 2.

5. the transmission mechanism includes a first transmission gear, a second transmission gear, a third transmission gear, a fourth transmission gear, and a chain; the first transmission gear is fixedly connected to the planetary gear set; the second transmission gear is adjacent to the first transmission gear, the third transmission gear is coaxially connected to the second transmission gear; the fourth transmission gear is coaxially connected to the wheel, and the fourth transmission gear meshes with the third transmission gear; the chain is sleeved onto the first transmission gear and the second transmission gear; 3. The hybrid power system of claim 2.

6. In pure electric mode, the clutch fixes the sun gear and the planetary gear set to form a rigid body; the energy storage module generates a first electric energy and provides the first electric energy to the first motor and the second motor via the electric energy controller; the first motor generates first mechanical energy to rotate the ring gear via the reduction gear; the second motor generates second mechanical energy to rotate the sun gear and the planetary gear set; 4. The hybrid power system of claim 3.

7. the first mechanical energy and the second mechanical energy are transmitted to the transmission mechanism via the power distributor; The transmission mechanism drives the wheels to rotate.

7. The hybrid power system of claim 6.

8. In hybrid power mode, the clutch separating the sun gear and the planetary gear set; the engine generates a third mechanical energy; A portion of the third mechanical energy drives the first motor to rotate in the normal direction, thereby generating second electrical energy; Another portion of the third mechanical energy is transmitted to the transmission mechanism via the reduction gear, the ring gear, and the planetary gear set, and simultaneously the planetary gear set drives the sun gear to reverse the second motor.

4. The hybrid power system of claim 3.

9. the third mechanical energy is transmitted to the transmission mechanism via the power distributor; The transmission mechanism drives the wheels to rotate.

9. The hybrid power system of claim 8.

10. The electric energy controller provides the second electric energy to the second motor to drive the second motor in a reverse direction to generate a fourth mechanical energy, and the power distributor generates a differential rotation.

9. The hybrid power system of claim 8.

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