阅读说明：本技术 自动变速器的换挡控制方法、自动变速器的换挡控制装置、自动变速器及车辆用动力系统 (Shift control method for automatic transmission, shift control device for automatic transmission, and vehicle power system ) 是由 李智明 吕正涛 于 2018-05-14 设计创作，主要内容包括：一种自动变速器的换挡控制方法、自动变速器的换挡控制装置、自动变速器及车辆用动力系统。该换挡控制方法基于启动挡位选择策略能够选择不同的启动挡位和/或基于同一启动挡位反复执行接合,直至接合成功。所述自动变速器的换挡控制方法在不利用动力源的情况下就解决了现有技术的自动变速器中产生的静态换挡故障,因而能够适用于混合动力车辆、纯电动车辆和传统车辆；并且由于该控制方法不利用任何动力源,因此该控制方法不会由于车辆的供能问题而导致无法起作用。(A shift control method for an automatic transmission, a shift control device for an automatic transmission, and a vehicle power system are provided. The shift control method is capable of selecting different starting gears based on a starting gear selection strategy and/or repeatedly performing engagement based on the same starting gear until engagement is successful. The gear-shifting control method of the automatic transmission solves the problem of static gear-shifting fault generated in the automatic transmission in the prior art without using a power source, so that the gear-shifting control method can be applied to hybrid vehicles, pure electric vehicles and traditional vehicles; and since the control method does not utilize any power source, the control method is not rendered inoperable due to energy supply problems of the vehicle.)

A shift control method of an automatic transmission including a plurality of gears each including a corresponding synchromesh mechanism and a gear, the control method comprising the steps of:

a request receiving step of receiving a request for a transition of a vehicle including the automatic transmission from a stationary state to a forward state;

a gear selection step, namely selecting a starting gear according to a preset starting gear selection strategy; and

a synchronization control step of executing synchronization control of engaging the corresponding synchromesh mechanism with the range gear based on the selected starting range.

The shift control method according to claim 1, characterized by further comprising a synchronization state detection step for detecting whether the synchronization control is successful after the synchronization control step.

The shift control method of claim 2, wherein the initiating a gear selection strategy comprises:

taking a gear different from the selected starting gear as a gear selection sequence of the starting gear; and/or

Based on the number of repeated attempted engagements in the same starting gear.

The shift control method according to claim 3, characterized in that the gear selection order is an order in which different gears are selected as the starting gear in order from a1 st gear of the automatic transmission.

The shift control method according to claim 3 or 4, characterized in that the number of engagements is greater than or equal to three.

The shift control method according to any one of claims 1 to 5, characterized in that in the synchronous control step, the starting gear is selected by a shift motor, and a synchromesh mechanism and a gear corresponding to the starting gear are engaged by a shift motor.

The shift control method according to claim 6,

in the synchronous state detecting step, a position of the shift motor is detected by a shift motor position sensor, and it is determined that the synchronous control is successful by determining that the synchronous engagement mechanism controlled by the shift motor is engaged with the range gear after detecting that the shift motor reaches the position that has been engaged for a predetermined time.

The shift control method of an automatic transmission according to claim 6 or 7, characterized in that in the synchronous state detection step, in the case where the synchronous control is made successful after determination via at least two starting ranges, if the vehicle makes a request to remain in a stationary state or makes a request to shift from a stationary state to a reverse state, the request to maintain the vehicle in a stationary state or the request to shift from a stationary state to a reverse state is performed without performing the request to shift the vehicle from a stationary state to a forward state.

A shift control device of an automatic transmission including a plurality of gears each including a corresponding synchromesh mechanism and a gear, the shift control device comprising:

a request receiving module for receiving a request for a transition of a vehicle including the automatic transmission from a stationary state to a forward state;

the gear selection module is used for selecting a starting gear according to a preset starting gear selection strategy; and

a synchronization control module for executing synchronization control of engaging the corresponding synchromesh mechanism with a range gear based on the selected starting range.

The shift control device according to claim 9, further comprising a synchronization state detection module for detecting whether the synchronization control is successful.

The shift control device according to claim 9 or 10, wherein the gear selection module prestores the starting gear selection strategy, which includes:

taking a gear different from the selected starting gear as a gear selection sequence of the starting gear; and/or

Based on the number of repeated attempted engagements in the same starting gear.

The shift control device according to claim 11, characterized in that the gear selection order is an order in which different gears are selected as the starting gear in order from a1 st gear of the automatic transmission.

The shift control device according to claim 11 or 12, characterized in that the number of engagements is greater than or equal to three.

An automatic transmission includes a shift control device and a shift synchronizing device,

the gear shift control device stores a predetermined starting gear selection strategy and selects a starting gear according to the starting gear selection strategy, and the gear shift control device transmits a starting gear signal corresponding to the selected starting gear to the gear shift synchronization device, and

the gear shifting synchronous device comprises a gear selecting motor and a gear shifting motor, wherein the gear selecting motor selects a corresponding gear as a starting gear according to the starting gear signal, so that the gear shifting motor can control a corresponding synchronous meshing mechanism to be jointed with a gear.

The automatic transmission of claim 14, wherein the gear selection motor sequentially selects different gears as the starting gears according to a gear selection sequence of the starting gear selection strategy until the synchromesh mechanism and the gear corresponding to the starting gear are successfully engaged.

Automatic transmission according to claim 14 or 15, characterized in that the shifting motor is able to control the corresponding synchromesh mechanism to attempt a predetermined number of engagements with a gear wheel, based on the same starting gear, said predetermined number being included in the starting gear selection strategy.

The automatic transmission according to any one of claims 14 to 16, characterized in that the automatic transmission further comprises a shift motor position sensor by which a position of the shift motor is detected, and it is judged that the engagement of the synchromesh mechanism controlled by the shift motor with the starting gear is successful after the shift motor is detected to reach the position that has been engaged for a predetermined time.

The automatic transmission of claim 17, further comprising a counter that counts time after the shift motor position sensor detects that the shift motor reaches an engaged position.

A vehicular power system characterized by comprising the automatic transmission of any one of claims 14 to 18 and an engine and/or a motor drivingly coupled to the automatic transmission.