Electric elastic extended-range engine

Abstract

The invention discloses an electric elastic extended-range engine, belongs to the field of vehicle power systems, and is used for solving the problems that a traditional engine has a lot of losses in the energy conversion and utilization process and is poor in kinetic energy recovery effect. The electric elastic range-extending engine comprises double motors, a planetary gear assembly, an inertia wheel, a crankshaft, a connecting rod piston, an elastic device and a clutch. The two motors are respectively a high-speed motor and a low-speed motor; the upper half cycle of the crankshaft compresses the elastic device through the connecting rod piston to complete energy storage, the lower half cycle of the crankshaft releases kinetic energy through the elastic device, one part of energy is transmitted back to the inertia wheel to enable the inertia wheel to rotate in an accelerated mode to complete energy storage, and the other part of energy is transmitted to the clutch through the crankshaft to drive a vehicle to run. The engine is maintained to run continuously to drive the vehicle. The energy utilization rate is increased, the vehicle power performance is optimized, and efficient kinetic energy recovery is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle power systems. Specifically, it is an electric elastic range extender engine. Background Art

[0002] With the enhancement of environmental awareness and the increasing prominence of energy issues, improving the energy utilization efficiency of vehicle engines has become a research hotspot.

[0003] In the field of vehicle power systems, traditional engines and existing range extender engine technologies have many defects, which limit the improvement of vehicle performance and the efficient utilization of energy. The specific manifestations are as follows:

[0004] I. In terms of energy utilization efficiency

[0005] The energy conversion loss is large. Traditional engines rely on fuel combustion to generate power. During the energy conversion process, such as the conversion of heat energy into mechanical energy, there are a large number of energy losses. For example, a large amount of heat energy is carried away by the high-temperature exhaust gas in the combustion chamber and cannot be completely converted into effective power output, resulting in serious energy waste and low fuel utilization rate.

[0006] The power output does not match. Existing engines are difficult to achieve precise matching of power and load under different working conditions. In urban congested road conditions, where the vehicle starts and stops frequently and travels at low speeds, the engine is often in an inefficient operating range, and the output power is much greater than the actual demand, resulting in excessive energy consumption; while when high power output is required, such as during high-speed driving or climbing, the engine may not be able to efficiently meet the demand due to insufficient reserve power.

[0007] II. In terms of kinetic energy recovery

[0008] The recovery conditions are harsh. The kinetic energy recovery systems of traditional engines and some existing range extender engines can usually only be triggered under specific driving behaviors, such as when the vehicle decelerates or brakes. During normal driving, even if there is recoverable kinetic energy in the vehicle, it cannot be effectively utilized, resulting in a large amount of energy being wasted.

[0009] The recovery efficiency is low. The existing kinetic energy recovery technologies have limited recovery efficiency. There are energy losses during the transmission, storage, and reuse of the recovered energy, and it is difficult to efficiently convert the recovered kinetic energy into electrical energy or mechanical energy that can be reused again, and the effect on improving the overall energy utilization rate is not obvious.

[0010] III. In terms of structural design and coordinated operation

[0011] The structure is complex and the integration degree is low. Many traditional engines and existing range extender engines have complex structures, and the coordinated operation efficiency between components is not high. There are problems with power transmission and coordinated control between multiple independent systems, increasing energy losses and the risk of failures, and it is not conducive to the miniaturization and lightweight design of the engine.

[0012] Lack of innovative energy storage mechanisms. In the existing technology, the energy storage methods are relatively single, mostly relying on battery energy storage, and battery energy storage has problems such as slow charging speed, limited lifespan, and high cost. There is a lack of an innovative energy storage mechanism like the elastic device in the present invention that can quickly store and release energy and effectively cooperate with other components of the engine.

[0013] In summary, there are many losses in the process of energy conversion and utilization of traditional engines, and the kinetic energy recovery effect is not good, making it difficult to meet the current requirements of energy conservation, emission reduction, and efficient power output. Summary of the Invention

[0014] The purpose of the present invention is to provide an electric elastic range extender engine, through innovative structures and working methods

[0015] To achieve the above technical purpose, the technical solutions adopted by the present invention are as follows:

[0016] The electric elastic range extender engine includes a dual motor, a planetary gear assembly, a flywheel, a crankshaft, a connecting rod piston, an elastic device, and a clutch;

[0017] The dual motor includes a high-speed motor and a low-speed motor respectively;

[0018] In the first half of the crankshaft rotation cycle, the elastic device is compressed by the connecting rod piston to complete energy storage, and in the second half of the crankshaft rotation cycle, the elastic device releases kinetic energy. Part of the energy is fed back to the flywheel to accelerate the rotation of the flywheel to complete energy storage, and the other part of the energy is transmitted through the crankshaft to the clutch to drive the vehicle. Under the continuous driving of the dual motor and the flywheel, the elastic device continuously switches between energy storage and energy release to maintain the continuous operation of the engine to drive the vehicle. The elastic device includes but is not limited to hydraulic springs, pneumatic springs, etc. This elastic device is later equipped with an energy storage system and a super large capacitor, using this super large capacitor to assist the work of the dual motor and recharge the battery.

[0019] The high-speed motor is used for working under the conditions of high-speed driving, climbing, and overtaking of the vehicle, providing additional power required for high-speed driving of the vehicle.

[0020] The low-speed motor is used for starting the vehicle and working when the vehicle is driving at a low speed. When working, the low-speed motor always maintains a set speed to drive the vehicle engine to maintain a certain speed and make the flywheel have a certain speed at the same time.

[0021] In the normal driving state of the vehicle, the dual motor controls the first half of the crankshaft rotation cycle to compress the elastic device to work, and in the second half of the rotation cycle, the elastic device releases kinetic energy to work. Since the instantaneous rebound speed of the elastic device is greater than the speed of the dual motor compressing the elastic device, the vehicle is accelerated. Since the speed of the dual motor compressing the elastic device is slower than the speed of the elastic device releasing kinetic energy, the dual motor only works in the first half of the rotation cycle, saving some energy.

[0022] Through the above combination of double motors, flywheels, elastic devices, and crankshafts, energy consumption is more saved. Especially, the high-speed rebound characteristic of the elastic device is prominent when the vehicle is driving at high speed, achieving the effect of using a small amount of force to achieve a great effect.

[0023] It should be noted that regarding the kinetic energy recovery effect

[0024] When the motor is operating normally, the motor cannot recover kinetic energy. It can only be recovered under specific conditions. This problem is solved in the case of double motors. When accelerating, the low-speed motor is used for energy recovery work, and when driving at low speed, the high-speed motor is used for kinetic energy recovery. As long as the engine is working, there is a function of energy recovery.

[0025] Compared with the prior art, first, through the collaborative work of the double motors, flywheels, elastic devices, and crankshafts, the present invention significantly improves the energy utilization efficiency and reduces energy consumption. Second, by utilizing the high-speed rebound characteristic of the elastic device, it provides additional assistance when the vehicle is driving at high speed, improving the power performance of the vehicle. Third, the double motors respectively undertake the kinetic energy recovery work under different driving conditions, realizing the kinetic energy recovery under all working conditions of the engine, and further improving the energy utilization rate. [[ID=ll]] BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention can be further illustrated by the non-limiting embodiments given in the drawings;

[0027] Figure 1 is a working schematic diagram of the present invention;

[0028] The main element symbols are explained as follows:

[0029] 1 double motor, 2 planetary gear assembly, 3 flywheel, 4 crankshaft, 5 clutch, 6 elastic device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0031] As Figure 1 shown, the electric elastic range extender engine includes a double motor, a planetary gear assembly, a flywheel, a crankshaft, a connecting rod piston, an elastic device, and a clutch;

[0032] The double motors are respectively a high-speed motor and a low-speed motor;

[0033] In the first half of the rotation of the crankshaft, energy is stored through the connecting rod piston compression elastic device, and in the second half of the rotation of the crankshaft, kinetic energy is released through the elastic device. A part of the energy is fed back to the inertial wheel to accelerate the rotation of the inertial wheel to complete energy storage, and the other part of the energy is transmitted through the crankshaft to the clutch to drive the vehicle to run; under the continuous driving of the dual motors and the inertial wheel, the elastic device continuously switches between energy storage and energy release to maintain the continuous operation of the engine to drive the vehicle.

[0034] The high-speed motor is used to work under the conditions of high-speed driving of the vehicle and climbing and overtaking, and provides additional power required for high-speed driving of the vehicle.

[0035] The low-speed motor is used to start the vehicle and work when the vehicle is driving at a low speed. When working, the low-speed motor always maintains a set speed to drive the vehicle engine to maintain a certain speed and at the same time make the inertial wheel have a certain speed.

[0036] During the energy storage process, the elastic device can drive the high-speed motor to rotate to realize kinetic energy recovery.

[0037] Under the normal driving state of the vehicle, the dual motors control the compression of the elastic device in the first half of the rotation of the crankshaft, and the elastic device releases kinetic energy in the second half of the rotation.

[0038] Since the instantaneous rebound speed of the elastic device is greater than the speed of the dual motors compressing the elastic device, the vehicle can achieve acceleration.

[0039] Since the speed of the dual motors compressing the elastic device is slower than the speed of the elastic device releasing kinetic energy, the dual motors only work in the first half of the rotation, thus saving some energy.

[0040] The planetary gear assembly is used to coordinate the power transmission between the dual motors, the inertial wheel and the crankshaft, ensure the speed matching of each component, and optimize the power output.

[0041] Under the accelerating driving state, the low-speed motor undertakes the energy recovery work; under the low-speed driving state, the high-speed motor performs kinetic energy recovery. As long as the engine works, it has the energy recovery function.

[0042] The clutch is used to control the connection and disconnection of the power between the engine and the vehicle transmission system to ensure the stability and controllability of the power transmission.

[0043] The specific process of the whole stage is as follows. In the starting stage, when the vehicle starts, the low-speed motor starts to work, drives the crankshaft to rotate, compresses the elastic device through the connecting rod piston, and completes the energy storage action in the first half of the rotation of the crankshaft.

[0044] During the normal driving stage, during the normal driving process of the vehicle, in the upper half of the crankshaft rotation cycle, the two motors drive the connecting rod piston to compress the elastic energy storage device for energy storage; in the lower half of the crankshaft rotation cycle, the elastic energy storage device releases kinetic energy. Part of the energy is transmitted to the flywheel to make it rotate at an accelerated speed for energy storage, and the other part of the energy is transmitted to the clutch through the crankshaft to drive the vehicle. Since the instantaneous rebound speed of the elastic energy storage device is greater than the compression speed of the two motors, the vehicle can accelerate. And because the compression speed of the two motors is relatively slow and they only work in the upper half of the cycle, energy is saved.

[0045] During the high-speed, climbing and overtaking stages, when the vehicle needs to drive at high speed, climb a slope or overtake, the high-speed motor intervenes to work and provides powerful power for the vehicle together with the energy released by the elastic energy storage device.

[0046] During the kinetic energy recovery stage, during the acceleration process, the low-speed motor recovers energy; when driving at low speed, the high-speed motor performs the kinetic energy recovery task to ensure that the engine always has the function of kinetic energy recovery during operation, improving the energy utilization rate.

[0047] The above has introduced the electric elastic range extender engine provided by the present invention in detail. The description of the specific embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. Electric elastic range extender engine, characterized in that: It includes a dual-motor, a planetary gear assembly, a flywheel, a crankshaft, a connecting rod piston, a spring device, and a clutch; The dual-motor consists of a high-speed motor and a low-speed motor respectively; In the first half of the crankshaft's rotation cycle, the connecting rod piston compresses the spring device to complete energy storage, and in the second half of the crankshaft's rotation cycle, the spring device releases kinetic energy. Part of the energy is fed back to the flywheel to accelerate the rotation of the flywheel for energy storage, and the other part of the energy is transmitted through the crankshaft to the clutch to drive the vehicle; Under the continuous driving of the dual-motor and the flywheel, the spring device continuously switches between energy storage and energy release to maintain the continuous operation of the engine to drive the vehicle.

2. The electric elastic range extender engine according to claim 1, wherein: The high-speed motor is used to work under the conditions of high-speed driving and climbing and overtaking of the vehicle, providing the additional power required for high-speed driving of the vehicle.

3. The electric elastic range extender engine according to claim 2, characterized in that: The low-speed motor is used to start the vehicle and work when the vehicle is driving at a low speed. During operation, the low-speed motor always maintains a set speed to drive the vehicle engine to maintain a certain speed and at the same time enable the flywheel to have a certain speed.

4. The electric elastic range extender engine according to claim 3, characterized in that: The spring device can drive the high-speed motor to rotate during the energy storage process to achieve kinetic energy recovery.

5. The electric elastic range extender engine according to claim 4, characterized in that: Under the normal driving state of the vehicle, the dual-motor controls the crankshaft to compress the spring device in the first half of the rotation cycle and the spring device to release kinetic energy in the second half of the rotation cycle.

6. The electric elastic range extender engine according to claim 5, wherein: Since the instantaneous rebound speed of the spring device is greater than the speed of the dual-motor compressing the spring device, the vehicle realizes acceleration.

7. The electric elastic range extender engine according to claim 6, characterized in that: Since the speed of the dual-motor compressing the spring device is slower than the speed of the spring device releasing kinetic energy, the dual-motor only works in the first half of the rotation cycle.

8. The electric elastic range extender engine according to claim 7, characterized in that: The planetary gear assembly is used to coordinate the power transmission between the dual-motor, the flywheel, and the crankshaft to ensure the speed matching of each component.

9. The electric elastic range extender engine according to claim 8, wherein: Under the accelerating driving state, the low-speed motor undertakes the energy recovery work; under the low-speed driving state, the high-speed motor conducts kinetic energy recovery. As long as the engine is working, it has the energy recovery function.

10. The electric elastic range extender engine according to claim 9, characterized in that: The clutch is used to control the connection and disconnection of the power between the engine and the vehicle transmission system to ensure the stability and controllability of power transmission.

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