Comprehensive power transmission device of hybrid electric vehicle

Abstract

The invention discloses a hybrid electric vehicle comprehensive power transmission device. A device with a differential generator as a main body is arranged between an engine and a wheel transmission shaft. The device mainly comprises three parts, namely a rotatable power generation coil, a power generation rotor, a collecting ring and the like. The differential generator is characterized in that a power generation coil and a rotor of the differential generator are respectively fixed outside a vehicle wheel transmission shaft and an engine crankshaft, the power generation coil and the rotor of the generator need to rotate, and the rotating speeds of the two parts are different. Electric energy generated by differential active power generation of the generator meets the power utilization requirement of the driving motor; the electromagnetic torsion generated by the differential speed of the generator solves the automatic clutch, power transmission and power speed change functions of the power output of the hybrid electric vehicle engine; the generator passively generates power in a reverse differential mode, vehicle kinetic energy is converted into electric energy, and the battery charging requirement (electricity receiving) and the vehicle deceleration function are met. The application of the device provides a new vehicle power operation mode.

Description

Technical Field

[0001] The present invention belongs to the field of comprehensive power transmission of hybrid electric vehicles, and in particular to a device integrating engine power output automatic clutch function, power transmission function, power speed change function, power generation function, kinetic energy recovery and conversion into electric energy when the vehicle slows down, and vehicle deceleration function. Background Art

[0002] In the existing power output clutch technology of fuel vehicles, some use manual or electronic methods to control the mechanical contact and separation of the two friction plates of the clutch to transmit or separate the kinetic energy output by the engine. This kind of mechanical clutch plate is a wear-prone part; some automatic transmission vehicles use hydraulic turbine torque converter clutch transmission power. This device has a complex structure, and the hydraulic turbine torque conversion generates heat and consumes kinetic energy. Manual transmission vehicles need to manually control the power output clutch system, which is inconvenient to operate.

[0003] In the existing transmission technology for fuel vehicles, whether it is an automatic transmission vehicle or a manual transmission vehicle, the vehicle speed change is achieved by switching the gear size. When the vehicle changes speed, there is a certain degree of setback, and the gearbox structure is complex and easy to damage.

[0004] In existing hybrid electric vehicles, the generator that provides electrical energy to the power battery has a generator stator fixed to the vehicle structure and a rotor that rotates to generate electrical energy. The main function of the generator is to generate electricity and start the fuel engine. Summary of the invention

[0005] Content of the invention: An integrated power transmission device is installed between the engine and the transmission shaft of a hybrid vehicle to replace the existing clutch and gearbox (or automatic gearbox). The device mainly consists of three parts: a rotatable generator coil 1, a generator rotor 2 and a collector ring 3. The characteristics are: the generator coil and the rotor are respectively fixed to the vehicle wheel transmission shaft 4 and the engine crankshaft 5 (or connected in reverse), and the main body of this device is called a differential generator. The characteristics of this generator are: both the generator coil and the rotor need to rotate. The so-called differential generator means that the generator coil and the generator have different rotation speeds.

[0006] The invention aims to solve the problem: providing a new vehicle power operation mode, replacing the vehicle clutch, gearbox or automatic gearbox. The power output of the hybrid vehicle engine realizes the automatic clutch function, power transmission function, power speed change function, differential active power generation function, differential passive power generation (when the vehicle slows down, kinetic energy is recovered and converted into electrical energy) function and vehicle deceleration function in a simple device.

[0007] The solution to solve the above multiple functions in one device is: a comprehensive power transmission device with a differential generator as the main body is set between the engine and the wheel drive shaft. The generator coil and the generator rotor are both in a rotating state when the vehicle is moving. When the generator coil and the rotor rotate differentially, electrical energy and electromagnetic torque (or resistance) will be generated, solving the automatic clutch function of the hybrid vehicle engine output power, power transmission function, power speed change function, differential active power generation function, differential passive power generation (kinetic energy conversion into electrical energy when the vehicle slows down) function and vehicle deceleration function. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The specific structure of the present invention is further described in detail in the accompanying drawings: Figure 1 It is a structural schematic diagram of a hybrid electric vehicle, in which reference 1 is a rotatable generator coil connected to the transmission shaft; reference 2 is a generator rotor connected to the crankshaft; reference 3 is a collector ring; reference 4 is a vehicle power transmission shaft; reference 5 is an engine crankshaft; reference 6 is a vehicle drive motor; and reference 7 is a power battery.

[0009] In the accompanying drawings, reference numerals 1, 2 and 3 constitute the main part of the present invention, namely, the hybrid vehicle integrated power transmission device, which is installed between reference numerals 4 and 5.

[0010] The attached drawings of the specification also serve as the abstract drawings of the specification. DETAILED DESCRIPTION

[0011] After the hybrid vehicle integrated power transmission device is installed between the engine and the wheel drive shaft, the differential generator coil and the generator rotor of this device are in a rotating state when the vehicle is moving. The generator coil and the rotor generate electrical energy and electromagnetic torque (or resistance) when they rotate differentially, solving the automatic clutch function, power transmission function, power speed change function, differential active power generation function, differential passive power generation (kinetic energy collection when the vehicle slows down) function and vehicle speed reduction function of the hybrid vehicle engine output power. The specific implementation is as follows:

[0012] Application scenario one, when the vehicle starts: the engine starts, driving the differential generator rotor to rotate, while the generating coil connected to the wheel drive shaft does not move, cutting the magnetic lines of force to generate high current, and collecting electric energy through the collector ring. The current is transmitted to the wheel drive motor 6 to drive the vehicle to start; at the same time, the engine rotates, driving the differential generator rotor to rotate, and the generating coil does not move, cutting the magnetic lines of force to generate current, and high electromagnetic torque is generated between the coil and the rotor. The coil starts to rotate, and the drive shaft connected to the coil drives the vehicle to start.

[0013] Application scenario two, the acceleration stage after the vehicle starts: the engine continues to drive the differential generator rotor to rotate, and a high speed difference is formed between the rotor and the generator coil. The generator continues to generate electricity, and the drive motor continues to drive the wheels to accelerate. At the same time, the engine continues to run, driving the rotor to rotate at high speed, and the generator coil rotates slowly, forming a high speed difference, cutting the magnetic lines to generate current, and generating high electromagnetic torque between the coil and the rotor. The coil rotates faster, and the drive shaft connected to the coil drives the vehicle to accelerate.

[0014] Application scenario three, the vehicle enters the uniform speed stage: the engine continues to drive the differential generator rotor to rotate, forming a low speed difference with the coil speed, the generator reduces the power generation, and the power required to drive the motor is also reduced. It only needs to drive the vehicle to overcome wind resistance and other friction resistance; at the same time, the engine continues to run, driving the rotor to continue to rotate, forming a low speed difference with the generator coil, cutting the magnetic lines to generate current, and there is still electromagnetic torque between the generator coil and the rotor. The drive shaft connected to the coil also drives the vehicle to overcome wind resistance and other friction resistance.

[0015] Application scenario four, vehicle deceleration or downhill scenario: close the accelerator, step on the brake, cut off the power supply to the wheel drive motor, reduce the engine speed, and reduce the generator rotor speed. At this time, a reverse speed difference is formed with the speed of the generating coil connected to the transmission shaft, and the magnetic lines are cut to generate current. The differential generator generates reverse power, collects electrical energy through the collector ring, and stores it in the power battery 7, completing the conversion of kinetic energy into electrical energy, commonly known as collecting electricity; at the same time, the engine runs at a low speed, driving the generator rotor to rotate at a low speed, forming a reverse speed difference with the generating coil, and still cutting the magnetic lines to generate current. Reverse electromagnetic torque, i.e. electromagnetic resistance, is generated between the coil and the rotor, the speed of the generating coil is reduced, and the transmission shaft connected to the coil drives the vehicle to slow down.

[0016] Application scenario five, vehicle engine idling state: step on the brake to cut off the power supply to the wheel drive motor. At this time, the generator coil is stationary, and the generator driven by the engine is in a pure power generation state to charge the power battery.

Claims

1. A hybrid vehicle integrated power transmission device, installed between the engine and the transmission shaft, the device mainly consists of three parts: a rotatable generator coil, a generator rotor and a collector ring, etc., characterized in that: The generator coil and rotor are respectively fixed on the wheel drive shaft and the engine crankshaft (or connected in reverse). The main part of this device is a differential generator. Both the generator coil and the rotor need to rotate, and the generator coil and the generator speed are inconsistent.

2. The hybrid electric vehicle integrated power transmission device is characterized by: This device integrates the engine power transmission with automatic clutch function, power transmission function, power speed change function, differential active power generation function, differential passive power generation function (kinetic energy recovery converted into electrical energy when the vehicle slows down) function and vehicle deceleration function.

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