KR19990004984A - Automatic Transmission and Method of Electric Vehicle - Google Patents

Abstract

The present invention relates to an automatic transmission and a method of an electric vehicle, which connects an actuator motor to a synchro mechanism, couples a shift sleeve, a plurality of 1,2-stage switch sensors and a neutral switch sensor to a shift rail, and also switches each switch. Connect the sensor to the drive relay, connect the drive relay to the actuator motor, and connect the shift sleeve to the synchro mechanism at the output end of the actuator motor, and connect each switch sensor, drive relay and actuator motor to the system controller, By controlling, the structure of the drive mechanism for automatic transmission is simplified, and the cost of the product is greatly reduced, and the reliability of the product is greatly improved.

Description

Automatic Transmission and Method of Electric Vehicle

The present invention relates to an automatic transmission of the electric vehicle and a method thereof, and more particularly, to connect an actuator motor to a synchro mechanism, to combine a shift sleeve and a plurality of 1,2-stage switch sensors and a neutral switch sensor to a shift rail, Connect the switch sensor to the drive relay, connect the drive relay to the actuator motor, and connect the shift sleeve to the synchro mechanism at the output end of the actuator motor, and connect each switch sensor, drive relay and actuator motor to the system controller. By controlling, the structure of the drive mechanism for the automatic transmission is simplified and at the same time significantly reduces the cost of the product, and relates to an automatic transmission of the electric vehicle and a method for improving the reliability of the product significantly.

In general, the electric vehicle (EV) is excellent in the characteristics of the motor can obtain the performance of the vehicle required by only a gear reducer having a single gear ratio or only two speeds of the first and second speed.

However, if only the reducer is used, the capacity of the motor should be relatively high. Therefore, the two-speed system is used to operate the motor as efficiently as possible.

Electric vehicles also have limited storage capacity, so energy efficiency is very important. Therefore, manual transmission system is preferred to automatic transmission system.

However, for the convenience of operation, systems for automatically shifting between 1st and 2nd speeds have been developed, and the method is equipped with an actuator (motor) for shifting in the transmission mechanism, and the synchro mechanism (drive shaft and It is shifting by moving the gear which engages 1st or 2nd gear.

The shift is performed by the shift pattern algorithm determined based on the speed of the vehicle and the depth of the accelerator in a manner similar to the shift algorithm of the automatic transmission.

However, the transmission system of the general electric vehicle is not only very complicated actuator drive and algorithm, but also has the disadvantage that the reliability of the product increases with the cost of the product.

Accordingly, the present invention is to provide an automatic transmission apparatus and method for an electric vehicle, which can greatly simplify the structure of the actuator driving device, greatly reduce the cost of the product and improve the reliability.

The present invention, in order to achieve the above object, by connecting the actuator motor to the synchro mechanism to drive the synchro mechanism, coupling the shift sleeve to the shift rail, a plurality of single-stage switch sensor, neutral from the outside of the shift rail The switch sensor and the two-stage switch sensor are sequentially combined at equal intervals, and the first-stage switch sensor, the neutral switch sensor, and the two-stage switch sensor are connected to the drive relay to which the control signal is input.

The drive relay is configured to be connected to the actuator motor and to drive the shift sleeve engaged with the synchro mechanism at the output end of the actuator motor.

In addition, the one-stage switch sensor, the neutral switch sensor and the two-stage switch sensor, the drive relay, the actuator motor has a feature configured to be operated, controlled by connecting to the system controller.

1 is a configuration diagram of an automatic transmission system of the present invention

Figure 2 is a perspective view of the actuator and the synchro mechanism of the present invention

Figure 3 is a drive circuit diagram of the automatic transmission system of the present invention

4 is a flow chart of the present invention.

5 is a logic table for controlling the automatic transmission system of the present invention.

* Explanation of symbols for main parts of the drawings

10,20: Wheel 30: Differential gear device

40: secondary gear 50: secondary shaft

60: synchro mechanism 70: actuator motor

80: second gear 90: first gear

100: primary shaft 110: traction motor

120: shift rail 130: shift sleeve

140: first stage switch sensor 150: neutral switch sensor

160: two-stage switch sensor 170: drive relay

180: system controller

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention as follows.

1 is a schematic configuration diagram of an automatic transmission system of the present invention, in which a differential gear device 30 is connected between wheels 10 and 20 on both sides, and a secondary gear 40 is fitted to an output side of the differential gear device 30. And a synchro mechanism 60 on the secondary shaft 50 including the secondary gear 40.

In addition, the actuator motor 70 is connected to the synchro mechanism 60 so as to drive the synchro mechanism 60, and the second gear 80 and the first gear 90 are fitted to the respective gears of the secondary shaft 50. These second gear 80 and the first gear 90 is configured to be coupled to the primary shaft (100).

In addition, the primary shaft 100 is configured by connecting to the traction motor 110.

Figure 2 is a perspective view of the actuator and the synchro mechanism of the present invention, Figure 3 is a drive circuit diagram of the automatic transmission system of the present invention, the shift sleeve 130 is coupled to the shift rail 120, from the outside of the shift rail 120 The first stage switch sensor 140, the neutral switch sensor 150, the two-stage switch sensor 160 are sequentially coupled at equal intervals, respectively, the first stage switch sensor 140, the neutral switch sensor 150, the second stage switch The sensor 160 is connected to the driving relay 170 to which the control signal is input.

The drive relay 170 is configured to be connected to the actuator motor 70 and to connect and drive the shift sleeve 130 engaged with the synchro mechanism 60 to an output end of the actuator motor 70. .

In addition, the first stage switch sensor 140, the neutral switch sensor 150 and the second stage switch sensor 160, the drive relay 170, the actuator motor 70 is connected to the system controller 180 to operate, control It is configured to be.

Therefore, in the present invention, as shown in FIGS. 1 to 5, the shift actuator can be easily turned ON / OFF, that is, the first stage switch sensor 140 is turned ON when the synchro mechanism 60 moves to the first stage and is completely engaged. , The neutral switch sensor 150 and the two-stage switch sensor 160 are similarly ON / OFF controlled.

In this case, when power is applied to the actuator motor 70 and the gear is completely engaged with the first gear, the first switch sensor 150 is turned on and the power is cut off, while the power of the actuator motor 70 is reversed. When reverse rotation, the synchro mechanism 60 moves to the neutral position while being separated from the first gear, and the neutral switch sensor 150 is turned on to cut off the power.

The position conversion from the neutral position to the 2nd stage or the 2nd position to the neutral position is also performed in the same way. By performing ON / OFF control in this way, the device structure can be simplified and the reliability of the device configuration can be improved.

In this case, when shifting from the 1st or 2nd position to the neutral position, the power is cut off when the neutral switch sensor 150 is turned on, but at this time, the neutral motor is moved away from the neutral position by the inertia of the actuator motor 70. The wear occurs due to the staggering of the synchro mechanism 60 by moving the stroke by a predetermined stroke in the direction.

However, when the synchro mechanism 60 is moved to the position of the complete shift stage and the switch sensor of the shift stage is turned on, not only the power is turned off but also the both ends of the coil coming out of the actuator motor 70 are grounded. As the closed circuit is formed inside, the inertial energy is extinguished by itself and thus stops rapidly.

On the other hand, when the shift pattern algorithm switches from the first position to the neutral position, when SET R1 and SET R2 of the system controller 180 are ON and the neutral switch sensor SN is ON, SET R1 is set to NOR and SET R2. ON.

If SET R1 and SET R2 of the system controller 180 are ON and the two-stage switch sensor S2 is ON when the switch is made from the neutral position to the second stage position, the SET R1 is set to NOR and the SET R2 is set to ON.

In addition, when switching from the second position to the neutral position, when SET R1 of the system controller 180 is ON, SET R2 is NOR, and the neutral switch sensor SN is ON, SET R1 and R2 are respectively NOR.

On the other hand, when switching from the neutral position to the first stage position, when SET R1 of the system controller 180 is ON, SET R2 is NOR, and the first stage switch sensor S1 is ON, SET R1 and R2 are respectively NOR.

As described above, the present invention connects an actuator motor to a synchro mechanism, couples a plurality of 1,2-stage switch sensors and a neutral switch sensor to a shift rail while coupling a shift sleeve to a shift rail, and also switches each switch sensor. By connecting the drive relay to the actuator motor, connecting the shift sleeve to the synchro mechanism at the output terminal of the actuator motor, and connecting and operating each switch sensor, drive relay and actuator motor to the system controller In addition, the structure of the driving mechanism for automatic shifting is simplified, and the cost of the product is greatly reduced, and the reliability of the product is greatly improved.

Claims (2)

An automatic transmission comprising a shift rail and a synchro mechanism coupled to a shift sleeve, comprising: an actuator motor connected to a shift sleeve to drive the synchro mechanism, a first stage switch sensor and a neutral switch sensor sequentially coupled from the inside to the shift rail; And a two-stage switch sensor, a drive relay connected to the switch sensor and the actuator motor, and a system controller connected to each of the switch sensor, the drive relay and the actuator motor. Detecting the current shift switching state, determining whether SET R1, R2 of the system controller controlling the drive relay is ON, ON or NOR respectively, and detecting whether the switch sensor of each shift stage is ON. Step and the automatic shifting method of the electric vehicle to set the SET R1, R2 to NOR, ON or NOR state when the switch sensor is ON.