CN207955318U - A kind of hybrid power system of automobile - Google Patents

Abstract

The utility model provides a hybrid power system of an automobile, which belongs to the technical field of automobiles. It solves the requirement that the vehicle hybrid power system is difficult to realize the co-optimized design of vehicle fuel consumption and body size. The hybrid power system of this automobile includes a driving motor, a power output shaft, an intermediate shaft and an engine capable of driving the power output shaft to rotate. The shaft rotates, the intermediate shaft is provided with an intermediate shaft driving gear connected with the automobile differential, the output shaft of the driving motor is provided with a driving motor driving gear, and the intermediate shaft is provided with a driving motor meshing with the driving motor driving gear. Driven gear, the gear ratio of the driving motor driven gear and the driving motor driving gear is greater than the gear ratio of the first gear pair. The utility model can reduce the size of the vehicle body under the premise of ensuring the fuel economy.

Description

A hybrid system of a car

technical field

The utility model belongs to the technical field of automobiles and relates to a hybrid power system of automobiles.

Background technique

With the increasingly stringent environmental protection measures around the world, hybrid vehicles have become a hot topic in automotive research and development due to their energy-saving and low-emission characteristics. A hybrid vehicle refers to a vehicle that is equipped with two power sources at the same time, namely, a thermal power source (generated by a traditional gasoline engine or a diesel engine) and an electric power source (battery and electric motor). By using electric motors on hybrid electric vehicles, the power system can be flexibly adjusted according to the actual operating conditions of the vehicle, while the engine keeps working in the area with the best overall performance, thereby reducing fuel consumption and emissions.

For example, the Chinese patent document discloses a hybrid power system of an automobile (application number: 200910140702.9), including an engine, a first motor, a second motor, a clutch, a transmission mechanism with a transmission shaft and a battery, the first motor and the second The motors are respectively connected to the batteries, the motor shaft of the second motor is connected to the transmission mechanism, the output shaft of the engine is connected to the motor shaft of the first motor, and the motor shaft of the first motor is hollow shaft, the clutch is arranged in the motor shaft of the first motor, the driving part of the clutch is connected with the inner wall of the motor shaft of the first motor, and the driven part of the clutch is connected with the transmission shaft. In this system, the second motor, the engine and the generator are coaxially arranged, and the structure of this arrangement is relatively regular, and the arrangement is very convenient. However, in this system, the motor shaft of the second motor is coaxially connected with the transmission shaft, and the power of the second motor and the engine is transmitted to the wheels through the transmission shaft and then through the transmission mechanism, that is to say, the second motor and the engine are both The same power transmission line and the same speed ratio are used to output power to the whole vehicle. At this time, if the speed ratio is high, the torque requirement for the driving motor is low, but the engine speed is high at high speed, which will increase fuel consumption and noise. And if the speed ratio is low, although fuel consumption can be reduced, the driving motor needs to have a larger torque, resulting in an increase in the size of the driving motor, resulting in an increase in the size of the vehicle body width, which is not conducive to the optimal design of the vehicle body size.

Contents of the invention

The purpose of this utility model is to solve the above-mentioned problems in the existing technology, and propose a hybrid power system for automobiles. The technical problem to be solved by this utility model is: under the premise of ensuring fuel economy, the size of the vehicle body can be reduced .

The purpose of this utility model can be achieved through the following technical solutions: a hybrid power system of an automobile, comprising a drive motor, a power output shaft, an intermediate shaft and an engine capable of driving the power output shaft to rotate, and the power output shaft is parallel to the intermediate shaft Set, the power output shaft is connected with the intermediate shaft through the first gear pair and drives the intermediate shaft to rotate, the intermediate shaft is provided with an intermediate shaft driving gear connected with the automobile differential, it is characterized in that the output of the drive motor The shaft is provided with a driving motor driving gear, and the intermediate shaft is provided with a driving motor driven gear meshed with the driving motor driving gear. The diameter of the driving motor driving gear is smaller than the diameter of the driving motor driven gear. The gear ratio of the driven gear of the motor to the driving gear of the driving motor is greater than the gear ratio of the first gear pair.

The gear ratio is the ratio of the number of teeth of the large gear to the number of teeth of the small gear in the gear pair. In this application, the engine and the driving motor are two power transmission lines and use different speed ratios to drive the car, that is, the power of the engine is transmitted to the vehicle differential through the power output shaft, the first gear pair, the intermediate shaft and the intermediate shaft driving gear in sequence. The transmission performs power output to the vehicle, while the driving motor transmits power to the vehicle differential through the driving motor driving gear, driving motor driven gear, intermediate shaft and intermediate shaft driving gear to the vehicle differential. The gear ratio of the driven gear of the driving motor to the driving gear of the driving motor is greater than the gear ratio of the first gear pair, thus ensuring that the engine has a lower speed ratio than the driving motor, thereby ensuring the fuel economy of the car at high speed. . At the same time, in the power transmission route of the driving motor, since the diameter of the driving gear of the driving motor is smaller than the diameter of the driven gear of the driving motor, a deceleration mechanism is formed, so the driving motor with a smaller size can meet the power requirements of the car, thereby reducing body size.

In the above-mentioned hybrid power system of an automobile, the rotating shaft of the driving motor is arranged coaxially with the power output shaft. In the present application, the rotating shaft of the driving motor and the power output shaft are arranged coaxially, so that the structure of the hybrid power system is relatively regular, and the arrangement is very convenient.

In the above-mentioned hybrid power system of an automobile, the drive motor is a flat motor. The drive motor adopts a flat motor, so that the axial dimension of the motor is greatly reduced, and the width dimension of the vehicle body can be reduced in design. And although the size of the flat motor is reduced, the driving force of the flat motor is transmitted to the intermediate shaft by setting the larger driving motor driven gear and the smaller driving motor driving gear of the diameter, so that the smaller size of the flat motor is also It can meet the driving force required by the car, so the width of the body is reduced under the premise of ensuring the driving performance in pure electric mode.

In the above-mentioned hybrid power system of an automobile, the diameter of the driving motor driven gear is larger than the diameter of the intermediate shaft driving gear. Through such a design, the speed ratio of the drive motor to the vehicle's power output can be increased, which is conducive to making the vehicle's pure electric mode have better power performance when the size of the drive motor is small.

In the hybrid power system of the vehicle mentioned above, the first gear pair includes a power output shaft driving gear arranged on the power output shaft and a power output shaft driven gear arranged on the intermediate shaft, and the power output shaft driving gear It meshes with the driven gear of the power output shaft. Through such a design, the power of the power output shaft is transmitted to the intermediate shaft to drive the car.

In the above-mentioned hybrid power system of the vehicle, the driving gear of the driving motor is located between the driving motor and the driving gear of the power output shaft. If the driving motor is set between the driving gear of the driving motor and the driving gear of the power output shaft, the distance between the driven gear of the power output shaft on the intermediate shaft and the driven gear of the driving motor will increase, and the length of the intermediate shaft will increase accordingly, resulting in waste car space. However, the present application adopts that the driving motor driving gear is located between the driving motor and the power output shaft driving gear, so that the driving motor is located on the outside, which is not only convenient for setting, but also can reduce the length of the intermediate shaft, thereby facilitating the optimal design of the vehicle body space.

In the hybrid power system of the above-mentioned automobile, the diameter of the driven gear of the power output shaft is larger than the diameter of the driving gear of the intermediate shaft, and the driving gear of the intermediate shaft and the driven gear of the driving motor are respectively positioned at the driven gear of the power output shaft. on both sides. Since the diameters of the driving motor driven gear, the power output shaft driven gear, and the intermediate shaft driving gear are successively reduced, the intermediate shaft driving gear and the driving motor driven gear are respectively arranged on the two ends of the power output shaft driven gear. side, so that the space utilization at the intermediate shaft is more reasonable, which is conducive to the optimal design of the body size.

In the hybrid power system of the vehicle mentioned above, the hybrid power system also includes a generator and a clutch, the output shaft of the engine is connected to the rotating shaft of the generator through a spline, the rotating shaft of the generator is connected to the active part of the clutch, The power output shaft is connected with the driven part of the clutch. In the hybrid drive mode, the clutch is combined so that the engine and the drive motor can drive the car together for power output.

Compared with the prior art, the hybrid power system of this car has the following advantages: in the hybrid power system of this car, the engine and the drive motor use different speed ratios to drive the car, without affecting each other, so the skills meet the fuel economy requirements of the engine. At the same time, it can meet the power performance of the car in pure electric mode under the premise of reducing the size of the drive motor.

Description of drawings

Fig. 1 is a structural schematic diagram of the hybrid power system of the automobile.

Fig. 2 is a schematic diagram of the transmission route in pure electric mode.

Fig. 3 is a schematic diagram of starting the engine driven by the generator and charging while driving.

Fig. 4 is a schematic diagram of a transmission line in a hybrid driving state.

Fig. 5 is a schematic diagram of a transmission line for energy recovery in a braking state.

Fig. 6 is a schematic diagram of a transmission route for charging in a parking state.

In the figure, 1. Driving motor; 2. Power output shaft; 3. Intermediate shaft; 4. Engine; 5. Driving gear of intermediate shaft; 6. Driving gear of driving motor; 7. Driven motor driven gear; 8. Power output shaft Driving gear; 9, power output shaft driven gear; 10, generator; 11, clutch; 12, differential.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Embodiment one

As shown in Figure 1, the hybrid power system of this automobile comprises engine 4, drive motor 1, generator 10, clutch 11, power take-off shaft 2, intermediate shaft 3, and drive motor 1 is a flat motor, and drive motor 1 adopts a flat motor, In this way, the axial dimension of the motor is greatly reduced, and the width dimension of the vehicle body can be reduced during design. The output shaft of engine 4 is splined connected with the rotating shaft of generator 10 , the rotating shaft of generator 10 is connected with the active part of clutch 11 , and the power output shaft 2 is connected with the driven part of clutch 11 . When the clutch 11 is combined, the engine 4 and the drive motor 1 can drive the vehicle together for power output. The power output shaft 2 and the intermediate shaft 3 are arranged in parallel, and the rotating shaft of the driving motor 1 is arranged coaxially with the power output shaft 2 . The power output shaft 2 is connected with the intermediate shaft 3 through the first gear pair and drives the intermediate shaft 3 to rotate. The first gear pair includes the power output shaft driving gear 8 arranged on the power output shaft 2 and the power output shaft arranged on the intermediate shaft Shaft driven gear 9, power output shaft driving gear 8 and power output shaft driven gear 9 are meshed, intermediate shaft driving gear 5 connected with automobile differential 12 is also arranged on intermediate shaft 3, power output shaft driven gear 5 The diameter of gear 9 is greater than the diameter of countershaft driving gear 5 .

As shown in Figure 1, the output shaft of the driving motor 1 is provided with a driving motor driving gear 6, and the intermediate shaft 3 is provided with a driving motor driven gear 7 meshing with the driving motor driving gear 6, and the driving motor driving gear 6 is located in the drive Between the motor 1 and the drive gear 8 of the power output shaft, the intermediate shaft drive gear 5 and the driven motor driven gear 7 are respectively located on both sides of the driven gear 9 of the power output shaft. The diameter of driving motor driving gear 6 is smaller than the diameter of driving motor driven gear 7, the diameter of driving motor driven gear 7 is larger than the diameter of intermediate shaft driving gear 5, and the gear ratio of driving motor driven gear 7 and driving motor driving gear 6 is greater than The gear ratio of the first gear pair, the gear ratio is the ratio of the number of teeth of the large gear to the number of teeth of the small gear in the gear pair. In this application, the engine 4 and the drive motor 1 are two power transmission lines and adopt different speed ratios to drive the car, that is, the power of the engine 4 passes through the power output shaft 2, the first gear pair, the intermediate shaft 3 and the intermediate shaft in sequence. The gear 5 is transmitted to the automobile differential 12 for power output of the vehicle, and the driving motor 1 is transmitted to the automobile differential through the driving motor driving gear 6, the driving motor driven gear 7, the intermediate shaft 3 and the intermediate shaft driving gear 5 12 Carry out power output to the whole vehicle. And the gear ratio of the drive motor driven gear 7 and the drive motor driving gear 6 is greater than the gear ratio of the first gear pair, thus ensuring that the engine 4 has a lower speed ratio than the drive motor 1, thereby ensuring that the motor 4 has a lower speed ratio than the drive motor 1, thereby ensuring that the motor is driven at a high speed. fuel economy. And in the power transmission route of driving motor 1, because the diameter of driving motor driving gear 6 is less than the diameter of driving motor driven gear 7, a deceleration mechanism is formed, so the driving motor 1 with a smaller size can meet the power requirements of the automobile. Thereby, the size of the vehicle body can be reduced.

Hereinafter, the working principle of the vehicle hybrid power system will be briefly introduced in conjunction with FIG. 2 to FIG. 6 . Among them, Fig. 2 is a schematic diagram of forward/reverse driving of the pure electric state system. When the system is in the pure electric state, the clutch 11 is disconnected, the P gear is released, the engine 4 and the generator 10 are not started, and the car is only driven by the drive motor 1 to run. When moving forward, the driving motor 1 rotates forward to generate power, which is transmitted to the differential 12 through the driving motor driving gear 6, the driving motor driven gear 7, the intermediate shaft 3, and the intermediate shaft driving gear 5 to output power to the vehicle. state. When reversing, the driving motor 1 reverses to generate power, which is transmitted to the differential 12 through the driving motor driving gear 6, the driving motor driven gear 7, the intermediate shaft 3, and the intermediate shaft driving gear 5 to output power to the vehicle. state.

Fig. 3 is a schematic diagram of starting the engine 4 driven by the generator 10 and charging while driving. During the driving process of the system, only the drive motor 1 generates power to drive the car to drive. When the generator 10 drives the engine 4 to start, the clutch 11 is disconnected, the generator 10 is started, and the anti-drag engine 4 is started. When charging while driving, the engine 4 is started, the clutch 11 is disconnected, the engine 4 drives the generator 10 to generate electricity, and the electric energy is stored in the battery.

Fig. 4 is a schematic diagram of the system in a hybrid driving state. During the hybrid driving state, the clutch 11 is engaged, the P block is released, the engine 4 and the drive motor 1 start to work simultaneously, and the power drives the vehicle through two transmission routes. Transmission line one: engine 4 is started, power is transmitted to differential 12 through clutch 11, power output shaft driving gear 8, power output shaft driven gear 9, intermediate shaft 3, and intermediate shaft driving gear 5 to carry out power output to the car; transmission Route 2: The driving motor 1 rotates forward to generate power, which is transmitted to the differential 12 through the driving motor driving gear 6, the driving motor driven gear 7, the intermediate shaft 3, and the intermediate shaft driving gear 5 to output power to the vehicle. state. The two power transmission lines are fused at the differential 12 to output power to the car.

Fig. 5 is a schematic diagram of an energy recovery transmission route in a braking state. When the car brakes, the kinetic energy of the car drives the drive motor 1 through the differential 12, the intermediate shaft driving gear 5, the intermediate shaft 3, the driving motor driven gear 7, and the driving motor driving gear 6. At this time, the driving motor 1 is in the In the state of power generation, braking resistance is generated for the car, and the driving motor 1 charges the battery.

Fig. 6 is a schematic diagram of the charging transmission route in the parking state. When the system is parked, the P gear is engaged, the clutch 11 is disconnected, the engine 4 is started, and the generator 10 is driven, and the generator 10 generates electricity and stores it in the battery.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses a lot of 1. drive motor; 2. power output shaft; 3. intermediate shaft; 4. engine; 5. intermediate shaft driving gear; 6. driving motor driving gear; , power output shaft driving gear; 9, power output shaft driven gear; 10, generator; 11, clutch; 12, differential and other terms, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (8)

1. a kind of hybrid power system of automobile, including driving motor (1), power output shaft (2), jackshaft (3) and can drive The engine (4) of power output shaft (2) rotation, the power output shaft (2) and jackshaft (3) are arranged in parallel, and the power is defeated Shaft (2) be connected with jackshaft (3) by first gear pair and drive jackshaft (3) rotate, the jackshaft (3) be equipped with The jackshaft drive pinion (5) that automobile differential (12) is connected, which is characterized in that the output shaft of driving motor (1), which is equipped with, to be driven Dynamic motor driving gear (6), the jackshaft (3) be equipped with the driving motor that is meshed with driving motor driving gear (6) from Moving gear (7), the diameter of the driving motor driving gear (6) are less than the diameter of driving motor driven gear (7), the driving Motor driven gear (7) is more than the gear ratio of first gear pair with the gear ratio of driving motor driving gear (6).

2. the hybrid power system of automobile according to claim 1, which is characterized in that the shaft of the driving motor (1) It is coaxially disposed with power output shaft (2).

3. the hybrid power system of automobile according to claim 2, which is characterized in that the driving motor (1) is flat Motor.

4. the hybrid power system of automobile according to claim 1, which is characterized in that the driving motor driven gear (7) diameter is more than the diameter of the jackshaft drive pinion (5).

5. the hybrid power system of automobile according to claim 1 or 2 or 3 or 4, which is characterized in that the first gear Pair includes that the power output shaft driving gear (8) being arranged on power output shaft (2) and the power being arranged on jackshaft (3) are defeated Shaft driven gear (9), the power output shaft driving gear (8) and power output shaft driven gear (9) are meshed.

6. the hybrid power system of automobile according to claim 5, which is characterized in that the driving motor driving gear (6) between driving motor (1) and power output shaft driving gear (8).

7. the hybrid power system of automobile according to claim 5, which is characterized in that the power output shaft driven gear (9) diameter is more than the diameter of jackshaft drive pinion (5), and the jackshaft drive pinion (5) and the driving motor are driven Gear (7) is located at the both sides of power output shaft driven gear (9).

8. the hybrid power system of automobile according to claim 1 or 2 or 3 or 4, which is characterized in that this hybrid power system System further includes generator (10) and clutch (11), and the output shaft of the engine (4) passes through flower with the shaft of generator (10) Key connection, the shaft of the generator (10) are connect with the active part of clutch (11), the power output shaft (2) and clutch The secondary part of device (11) connects.