阅读说明：本技术 一种自动变速器滥用模式的识别及其保护方法 (Automatic transmission abuse mode identification and protection method ) 是由 杨磊 刘强 曹永� 王洪志 郭太民 宗伟 李志宗 王圣涛 吴玉德 于 2020-07-24 设计创作，主要内容包括：本发明涉及一种自动变速器滥用模式的识别及其保护方法,当车辆的换挡模式为自动模式时,根据车速信号和油门信号判断变速器是否处于滥用模式,如果变速器处于滥用模式,则激活变速器的保护模式,使得变速器在一定的时间段内维持挡位不变。在TCU软件上,控制逻辑根据车速信号和油门信号判断变速器的使用状态,当变速器处于滥用模式时触发保护模式,自动变速器将在适当时间内进行挡位固定,禁止频繁挡位切换；促使驾驶员以正确的方法使用自动变速器。当人为进行滥用误操作变速器时,对变速器及时保护,增加变速器的使用寿命。(The invention relates to an identification and protection method of an abuse mode of an automatic transmission. On TCU software, control logic judges the service condition of the speed changer according to the vehicle speed signal and the throttle signal, when the speed changer is in an abuse mode, a protection mode is triggered, the automatic speed changer fixes the gears within a proper time, and frequent gear switching is forbidden; the driver is prompted to use the automatic transmission in the correct way. When the misoperation transmission is abused manually, the transmission is protected in time, and the service life of the transmission is prolonged.)

1. An automatic transmission abuse mode identification and protection method, characterized by: and when the gear shifting mode of the vehicle is the automatic mode, judging whether the transmission is in the abuse mode according to the vehicle speed signal and the accelerator signal, and if the transmission is in the abuse mode, activating the protection mode of the transmission to enable the transmission to maintain the gear unchanged within a certain time period.

2. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 1, wherein: determining whether the transmission is in an abuse mode, comprising the steps of:

s01: collecting the running speed of a vehicle;

s02: judging whether the running speed meets a vehicle speed condition or not;

if yes, go to S03;

if not, go to S01;

s03: judging whether the conditions of the accelerator opening degree and the accelerator opening degree change rate are met simultaneously when the accelerator is stepped;

if yes, go to S04;

if not, go to S01;

s04: starting timing;

s05: judging whether the accelerator opening condition and the accelerator opening change rate condition are met simultaneously when the accelerator is released;

if yes, go to S06;

if not, go to S01;

s06: finishing timing and recording the interval time T1 between the step on the accelerator and the release of the accelerator;

s07: judging whether the interval time T1 between the step-on and the step-off meets the requirement of the time condition;

if yes, go to S08;

if not, go to S01;

s08: the count value N is increased by a fixed value;

s09: judging whether the count value N satisfies a numerical condition during a set time T2;

if so, determining that the transmission is in the abuse mode;

if not, go to S01;

wherein, the interval time T between the first stepping on the accelerator and the first releasing the accelerator₁Start timing and set time T₂Starting timing; setting time T₂After timing is over or the transmission is determinedAfter being in abuse mode, setting time T₂And resetting.

3. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 2, wherein: the method also comprises the following auxiliary judgment steps:

setting an assistance time T₃Auxiliary time T₃Equal to the set time T₂(ii) a When setting the time T₂Starting to time and reaching a specific time, and then assisting time T₃Starting timing;

at the auxiliary time T₃Meanwhile, the interval time T between the step-on and the step-off of the throttle is₁When the requirement of the time condition is met, the auxiliary counting value N₁Increasing a fixed value;

then judging at the auxiliary time T₃During the period, the auxiliary count value N₁Whether a numerical condition is satisfied; if so, the transmission is determined to be in the abuse mode.

4. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 3, wherein: setting time T₂After the timing is started, T is reached₂Auxiliary time T of/2 hours₃And starting timing.

5. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 2, wherein: when the accelerator is stepped on, the accelerator pedal is pressed,

the throttle opening degree conditions are as follows: the accelerator opening pedal is larger than or equal to a set threshold value pedal_on；

The conditions for the rate of change of throttle opening are: the throttle opening change rate ramp is greater than or equal to a set threshold value R_on。

6. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 2, wherein: when the gas valve is released, the gas valve is opened,

the throttle opening degree conditions are as follows: the accelerator opening pedal is less than or equal to a set threshold value pedal_off；

The conditions of the change rate of the throttle opening degree are as follows: the throttle opening change rate ramp is less than or equal to a set threshold value R_off。

7. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 2, wherein: the time conditions are as follows: time interval T between stepping on and releasing the accelerator₁Less than or equal to the set time threshold T_on。

8. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 2, wherein:

the numerical conditions are: is greater than a set value Non;

the fixed value is 1.

9. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 1, wherein: under the protection mode, shift line compensation is respectively carried out on the gear-up line and the gear-down line, so that the vehicle keeps running in a gear within a certain time.

10. A method of identifying and protecting an abuse mode of an automatic transmission according to claim 9, wherein: the shift line compensation mode is as follows:

on a downshift line, reducing the vehicle speed corresponding to all the accelerator opening degrees;

and on the gear-up line, the vehicle speed corresponding to all the accelerator opening degrees is improved.

Technical Field

The invention relates to the technical field of transmissions, in particular to an automatic transmission abuse mode identification and protection method.

Background

In an automatic mode (AUTO), the automatic transmission can perform an automatic gear shifting rule according to parameter signals such as vehicle speed and accelerator opening, and the automatic gear shifting rule is called as a gear shifting diagram and comprises gear up and gear down.

When a vehicle provided with the automatic transmission runs, the driving intention of a driver can be judged according to a vehicle speed signal and an accelerator opening signal which are acquired in real time to select a proper gear, so that the driving requirement is completely met, but when the accelerator opening is frequently and violently changed in a short time, the gears are frequently switched, the use times of a clutch are increased, and the service life of the automatic transmission is reduced.

The existing automatic transmission has no corresponding protection measures on software, and when the automatic transmission fails and is scrapped due to manual abuse operation, the source of responsibility cannot be defined. And part of illegal users can artificially damage the automatic transmission in the warranty period by adopting the working condition so as to pay the compensation of a deception manufacturer. At present, automatic transmissions at home and abroad do not have evasive measures for the operation, and automatic transmission manufacturers often suffer loss for compensation.

Disclosure of Invention

The invention aims to solve the technical problem of providing an automatic transmission abuse mode identification and protection method thereof, which can protect the transmission in time and prolong the service life of the transmission when the transmission is abused and misoperated manually.

In order to solve the technical problems, the technical scheme of the invention is as follows: when the shift mode of a vehicle is an automatic mode, whether the transmission is in an abuse mode is judged according to a vehicle speed signal and an accelerator signal, and if the transmission is in the abuse mode, the protection mode of the transmission is activated, so that the transmission maintains a gear unchanged within a certain time period.

As a preferred technical scheme, the method for judging whether the transmission is in the abuse mode comprises the following steps:

s01: collecting the running speed of a vehicle;

s02: judging whether the running speed meets a vehicle speed condition or not;

if yes, go to S03;

if not, go to S01;

s03: judging whether the conditions of the accelerator opening degree and the accelerator opening degree change rate are met simultaneously when the accelerator is stepped;

if yes, go to S04;

if not, go to S01;

s04: starting timing;

s05: judging whether the accelerator opening condition and the accelerator opening change rate condition are met simultaneously when the accelerator is released;

if yes, go to S06;

if not, go to S01;

s06: finishing timing and recording the interval time T1 between the step on the accelerator and the release of the accelerator;

s07: judging whether the interval time T1 between the step-on and the step-off meets the requirement of the time condition;

if yes, go to S08;

if not, go to S01;

s08: the count value N is increased by a fixed value;

s09: judging whether the count value N satisfies a numerical condition during a set time T2;

if so, determining that the transmission is in the abuse mode;

if not, go to S01;

wherein, the interval time T between the first stepping on the accelerator and the first releasing the accelerator₁Start timing and set time T₂Starting timing; setting timeT₂Setting time T after timing is over or after determining that the transmission is in an abuse mode₂And resetting.

As a preferable technical solution, the method further comprises the following auxiliary judgment steps:

setting an assistance time T₃Auxiliary time T₃Equal to the set time T₂(ii) a When setting the time T₂Starting to time and reaching a specific time, and then assisting time T₃Starting timing;

at the auxiliary time T₃Meanwhile, the interval time T between the step-on and the step-off of the throttle is₁When the requirement of the time condition is met, the auxiliary counting value N₁Increasing a fixed value;

then judging at the auxiliary time T₃During the period, the auxiliary count value N₁Whether a numerical condition is satisfied; if so, the transmission is determined to be in the abuse mode.

Preferably, the time T is set₂After the timing is started, T is reached₂Auxiliary time T of/2 hours₃And starting timing.

As a preferable technical proposal, when stepping on the accelerator,

the throttle opening degree conditions are as follows: the accelerator opening pedal is larger than or equal to a set threshold value pedal_on；

The conditions for the rate of change of throttle opening are: the throttle opening change rate ramp is greater than or equal to a set threshold value R_on。

As a preferred technical proposal, when the throttle is released,

the throttle opening degree conditions are as follows: the accelerator opening pedal is less than or equal to a set threshold value pedal_off；

The conditions of the change rate of the throttle opening degree are as follows: the throttle opening change rate ramp is less than or equal to a set threshold value R_off。

As a preferred technical scheme, the time condition is as follows: time interval T between stepping on and releasing the accelerator₁Less than or equal to the set time threshold T_on。

As a preferred technical solution, it is proposed that,

the numerical conditions are: greater than a set value N_on；

The fixed value is 1.

According to a preferable technical scheme, under the protection mode, shift line compensation is respectively carried out on an upshift line and a downshift line, so that a vehicle keeps running in a gear within a certain time.

As a preferred technical solution, the shift line compensation method is as follows:

on a downshift line, reducing the vehicle speed corresponding to all the accelerator opening degrees;

and on the gear-up line, the vehicle speed corresponding to all the accelerator opening degrees is improved.

On TCU software, control logic judges the service condition of the speed changer according to the vehicle speed signal and the throttle signal, when the speed changer is in an abuse mode, a protection mode is triggered, the automatic speed changer fixes the gears within a proper time, and frequent gear switching is forbidden; the driver is prompted to use the automatic transmission in the correct way. When the misoperation transmission is abused manually, the transmission is protected in time, and the service life of the transmission is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a plot of throttle opening before and after the protected mode is turned on and a corresponding gear curve;

FIG. 2 is a schematic flow chart of the present invention;

fig. 3 is a shift diagram of the present invention.

Detailed Description

When the shift mode of a vehicle is an automatic mode, whether the transmission is in an abuse mode is judged according to a vehicle speed signal and an accelerator signal, and if the transmission is in the abuse mode, the protection mode of the transmission is activated, so that the transmission maintains a gear unchanged within a certain time period.

Determining whether the transmission is in an abuse mode, comprising the steps of:

s01: collecting the running speed of a vehicle;

s02: judging whether the running speed meets a vehicle speed condition or not;

if yes, go to S03;

if not, go to S01;

s03: judging whether the conditions of the accelerator opening degree and the accelerator opening degree change rate are met simultaneously when the accelerator is stepped;

when the accelerator is stepped on, the accelerator pedal is pressed,

the throttle opening degree conditions are as follows: the accelerator opening pedal is larger than or equal to a set threshold value pedal_on；

The conditions for the rate of change of throttle opening are: the throttle opening change rate ramp is greater than or equal to a set threshold value R_on；

If yes, go to S04;

if not, go to S01;

s04: starting timing;

s05: judging whether the accelerator opening condition and the accelerator opening change rate condition are met simultaneously when the accelerator is released;

when the gas valve is released, the gas valve is opened,

the throttle opening degree conditions are as follows: the accelerator opening pedal is less than or equal to a set threshold value pedal_off；

The conditions of the change rate of the throttle opening degree are as follows: the throttle opening change rate ramp is less than or equal to a set threshold value R_off；

If yes, go to S06;

if not, go to S01;

s06: finishing timing and recording the interval time T1 between the step on the accelerator and the release of the accelerator;

s07: judging whether the interval time T1 between the step-on and the step-off meets the requirement of the time condition;

the time conditions are as follows: time interval T between stepping on and releasing the accelerator₁Less than or equal to the set time threshold T_on；

If yes, go to S08;

if not, go to S01;

s08: the count value N is increased by a fixed value; the fixed value may be 1;

s09: judging whether the count value N satisfies a numerical condition during a set time T2;

the numerical conditions are: greater than a set value N_on

If so, determining that the transmission is in the abuse mode;

if not, go to S01;

wherein, the interval time T between the first stepping on the accelerator and the first releasing the accelerator₁Start timing and set time T₂Starting timing; setting time T₂Setting time T after timing is over or after determining that the transmission is in an abuse mode₂And resetting. When the interval time T between stepping on the accelerator and releasing the accelerator is detected again₁Start timing and set time T₂And starting timing and repeating the detection and judgment processes.

Judging whether the transmission is in an abuse mode, firstly judging the speed of the vehicle, and if the running speed is higher than the set speed, judging whether the accelerator opening pedal is larger than or equal to the set threshold value pedal when the accelerator is stepped on_on(i.e., pepal. gtoreq. pepal_on) And the throttle opening change rate ramp is greater than or equal to a set threshold value R_on(i.e., ramp ≧ R_on) (ii) a If yes, timing is started, and then whether the accelerator opening pedal is smaller than or equal to the set threshold pedal when the accelerator is released is judged_off(i.e., pepal. ltoreq. pepal)_off) And the throttle opening change rate ramp is less than or equal to a set threshold value R_off(i.e., ramp ≦ R_off) (ii) a If yes, timing is finished and the interval time T between stepping on the accelerator and releasing the accelerator is recorded₁Then judging the interval time T between stepping on the accelerator and releasing the accelerator₁Whether or not less than or equal to the set time threshold T_on(ii) a If the time is satisfied, adding 1 to the count value N; if at the set time T₂The internal count value N is larger than the set value N_onThen the transmission is determined to be in the abuse mode and transmission protection is activatedMode(s).

Interval time T₁Start timing and set time T₂Starting timing, and setting time T when the protection mode is not activated₂During this time, repeatedly executing S01-S09 to detect whether the transmission is in the abuse mode until the transmission is determined to be in the abuse mode and the protection mode is activated or the time T is set₂And finishing the timing. And starting a new cycle when the conditions of the accelerator opening degree and the accelerator change rate when the accelerator is stepped are detected next time. The counting value N is only at a set time T₂During which time counting is carried out, after activation of the protection mode or setting of the time T₂After the timing is finished, resetting the count value N; when detecting that the condition of accelerator opening degree and the condition of accelerator change rate are met when stepping on the accelerator, the interval time T₁And starting timing, and ending and resetting timing when the accelerator opening condition and the accelerator change rate condition are met during accelerator release.

Since the program is set only at the set time T₂The method comprises the following steps of carrying out data acquisition on accelerator operation in an inner circulation mode, and when a working condition meeting the requirement of activating a protection mode simultaneously appears in two circulation modes, enabling the two independent circulation modes not to activate the protection mode, in order to avoid the situation, further comprising the following auxiliary judgment steps:

setting an assistance time T₃Auxiliary time T₃Equal to the set time T₂(ii) a When setting the time T₂Starting to time and reaching a specific time, and then assisting time T₃Starting timing; the specific time can be set according to actual needs, such as T₂/3、T₂/2 or 2T₂And/3, etc. Optimally, setting the time T₂After the timing is started, T is reached₂Auxiliary time T of/2 hours₃And starting timing.

When the auxiliary time T₃Start counting and at an auxiliary time T₃Meanwhile, the interval time T between the step-on and the step-off of the throttle is₁When the requirement of the time condition is satisfied, i.e. T₁Less than or equal to the set time threshold T_onAuxiliary count value N₁Increasing by 1; then judging at the auxiliary time T₃Inner, auxiliary counting value N₁Whether the numerical value strip is satisfiedThe requirement of the member, if satisfied, is N₁Greater than a set value N_onThen the transmission is determined to be in the abuse mode and the protected mode of the transmission is activated.

As shown in FIG. 1, when N is_onWhen =3, the first set time T₂In the protection mode, even if an operator still violently operates the accelerator, the transmission does not perform corresponding gear shifting, but maintains the gear during operation; if the auxiliary time T is present₃The protective mode is also activated accordingly, the duration of the protective mode is correspondingly extended, so that misuse of the transmission is avoided.

When the automatic transmission is in the protection mode state, as shown in fig. 1, 2, and 3, shift line compensation is performed for each of the upshift line and the downshift line for a set time. Specifically, as shown in FIG. 3, downshift line compensation n_upUp shift line compensation n_dnAt a vehicle speed variation amount n_upAnd n_dnIn the process, the vehicle keeps the gear Dx, frequent gear switching caused by frequent and violent change of an accelerator in a short time is avoided, the times of combination and separation of the clutch are reduced, the wear degree of the clutch is reduced, and the service life of the automatic transmission is prolonged.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.