CN113092129B

CN113092129B - Monitoring method for IUPR rate of gearbox

Info

Publication number: CN113092129B
Application number: CN202110337431.7A
Authority: CN
Inventors: 杨治学; 辛彩云; 杨涛; 冯子超
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-10-11
Anticipated expiration: 2041-03-30
Also published as: CN113092129A

Abstract

The invention relates to the technical field of gearbox control, and discloses a monitoring method of a gearbox IUPR rate, which is applied to a gearbox controller and comprises the following steps: respectively calculating IUPR rate values of all monitoring items of the gearbox in a driving cycle; and selecting the minimum IUPR value from the IUPR values corresponding to the monitoring items, and sending the minimum IUPR value to an on-board diagnosis system OBD. According to the invention, the IUPR rate of the gearbox is obtained by respectively calculating the IUPR rate of each monitoring item of the gearbox and selecting the minimum value from the IUPR rates, the obtained IUPR rates can accurately and reliably reflect the diagnosis function operation frequency of the gearbox in the daily use process due to the adoption of a plurality of monitoring items, the IUPR rates of the monitoring items can be respectively obtained by setting the minimum activation condition of the monitoring items, the IUPR rates of the gearbox are obtained by combining a plurality of monitoring items for operation, the requirements of OBDII can be met, and the performance of a vehicle-mounted diagnosis system is improved.

Description

Monitoring method for IUPR rate of gearbox

Technical Field

The invention relates to the field of gearbox control, in particular to a monitoring method for an IUPR rate of a gearbox.

Background

In the light automobile pollutant emission limit and the survey method (the sixth stage of china, national six) quotation, besides the related exhaust emission and evaporative emission limits are tightened, the requirements of the OBD part are changed from national five to the OBDII of CARB of california, which has stricter requirements in comparison with national five according to EOBD, wherein the requirements are stricter and more specific in comparison with national five by using the monitoring frequency IUPR, in order to adapt to new standards and improve the performance of vehicles, monitoring items about gearboxes are added in the monitoring items of the IUPR rate, and currently, in the vehicle industry, the limits and the calculation methods of the IUPR rate of gearboxes are not required, and a unified standard is not formed, or the monitoring values of the IUPR rate values of gearboxes of different manufacturers have larger differences.

Disclosure of Invention

The invention provides a monitoring method of an IUPR (axial positive response) rate of a gearbox, which solves the problem of monitoring the IUPR rate of the gearbox.

The technical scheme of the invention is realized as follows: a monitoring method of IUPR rate of a gearbox is applied to a gearbox controller and comprises the following steps:

step S1: respectively calculating IUPR rate values of all monitoring items of the gearbox in a driving cycle;

step S2: selecting the minimum IUPR rate value from the IUPR rate values corresponding to the monitoring items and sending the minimum IUPR rate value to an on-board diagnostic system (OBD);

in step S1, the calculation of the IUPR ratio value for each monitoring item of the gearbox comprises the following steps:

the IUPR ratio of the transmission monitoring term is:

when all conditions capable of diagnosing faults are met, the molecular counter is increased by 1, and the molecular counter is increased by 1 at most in one cycle period;

the denominator of the IUPR value includes a general condition denominator and a special condition denominator,

when general conditions are met or special conditions are met, the denominator counter is increased by 1, and in one driving cycle, the denominator counter is increased by at most 1;

and a part of monitoring items of the gearbox are provided with special conditions, a gearbox controller judges whether the minimum activation condition of the gearbox monitoring items is met or not according to a plurality of received detection signals, and if so, the special conditions are met.

Preferably, the transmission monitoring items include, but are not limited to: multiple torque converter faults, G7 speed sensor faults, C4 speed sensor faults, output shaft speed sensor faults, and clutch engagement faults.

As a further improvement, the transmission monitoring items include but are not limited to: normally open of the torque converter, normally closed of the torque converter, unreal signal values of the torque converter, unstable signal values of the G7 speed, unreal signal values of the G7 speed, unstable signal values of the C4 speed, unreal signal values of the C4 speed, unstable signal values of the output shaft speed, unreal signal values of the output shaft speed and incorrect clutch combination.

As a preferred technical solution, the general conditions include:

(1) The altitude is lower than 2400m, and the ambient temperature is higher than-7 ℃;

(2) The accumulated running time of the engine after starting is more than 600 seconds;

(3) The 40km/h running accumulated time is more than 300 seconds, and the continuous idling speed in a certain time period is more than 30 seconds;

(4) The IUPR denominator counter of the engine is updated.

The invention has the beneficial effects that: according to the invention, the IUPR rate of the gearbox is obtained by respectively calculating the IUPR rate of each monitoring item of the gearbox and selecting the minimum value from the IUPR rates, and as a plurality of monitoring items are adopted, the obtained IUPR rate can accurately and reliably reflect the diagnosis function running frequency of the gearbox in the daily use process, the IUPR rate of each monitoring item can be respectively obtained by setting the minimum activation condition of each monitoring item, the IUPR rate of the gearbox is obtained by combining a plurality of monitoring items for operation, the requirements of OBDII can be met, and the performance of a vehicle-mounted diagnosis system is improved.

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 block diagram of an embodiment of an operational logic.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments, and the description of the embodiments is provided to help understanding of the present invention, but not to limit the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1, a method for monitoring an IUPR rate of a transmission, applied in a transmission controller to monitor the IUPR rate of the transmission, includes the following steps:

the engine controller EMS is in data communication with the transmission controller TCU, which receives engine ignition cycle detection data and engine IUPR denominator counter data.

When the engine ignition cycle detection data is updated, the ignition cycle counter of the transmission controller is incremented by 1 and a driving cycle is entered.

The transmission controller TCU respectively calculates IUPR rate values of all monitoring items of the transmission in a driving cycle, the transmission has hundreds of fault diagnoses, and 10 faults are selected as the monitoring items of the transmission, wherein the monitoring items comprise that a hydraulic torque converter is normally open, the hydraulic torque converter is normally closed, the signal value of the hydraulic torque converter is not real, the signal value of a G7 speed signal is not stable, the signal value of a G7 speed signal is not real, the signal value of a C4 speed signal is not stable, the signal value of a C4 speed signal is not real, the signal value of an output shaft speed is not stable, the signal value of the output shaft speed is not real, and incorrect clutch combination is realized.

The present invention is not limited to the above 10 monitoring items, and can be selected or set according to industry standards and internal standards of enterprises.

The calculation of the IUPR rate value of each monitoring item of the gearbox comprises the following steps:

the IUPR ratio of the transmission monitoring term is:

when general conditions are met or special conditions are met, the denominator counter is increased by 1, and in one driving cycle, the denominator counter is increased by 1 at most.

The general condition and the special condition are judgment conditions of the IUPR rate applicable to each monitoring item of the transmission.

The general conditions include:

(1) The altitude is lower than 2400m, and the environmental temperature is higher than-7 ℃;

(3) The 40km/h running accumulated time is more than 300 seconds, and the continuous idle speed in a certain time period is more than 30 seconds;

(4) The IUPR denominator counter of the engine is updated.

When one of the general conditions is satisfied, the denominator counter is incremented by 1.

And a special condition denominator is set in part monitoring items of the gearbox, the gearbox controller judges whether the minimum activation condition of the gearbox monitoring items is met or not according to the received multiple detection signals, if so, the special condition is met, and a denominator counter is increased by 1.

For example, for torque converter fault diagnosis, diagnosing a normally open or normally closed fault of the torque converter, the minimum activation condition for IUPR rate calculation is:

(1) Within one driving cycle, the times of locking (Close) or unlocking (Open) of the hydraulic torque converter are more than or equal to 2 times, and the duration time of each time is more than 2 seconds;

(2) The torque converter lockup (Close) or lockup (Open) cumulative time ≧ 10 seconds within one driving cycle.

When any of the above conditions is met, i.e. the minimum activation condition for the monitoring term is met, the IUPR rate denominator counter of the monitoring term is incremented by 1.

The IUPR rate for a torque converter normally open/normally closed fault is the ratio of the numerator counter to the denominator counter.

The transmission controller TCU collects the IUPR rates of the monitoring items, and the minimum IUPR rate value is selected from the IUPR rates and sent to an on-board diagnostic system OBD.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A monitoring method for an IUPR rate of a gearbox is applied to a gearbox controller and comprises the following steps:

the engine controller EMS is in data communication with the transmission controller TCU, and the transmission receives engine ignition cycle detection data and engine IUPR denominator counter data; when the ignition cycle detection data of the engine is updated, adding 1 to an ignition cycle counter of a gearbox controller, and entering a driving cycle;

step S1:

the transmission controller TCU respectively calculates IUPR rate values of all monitoring items of the transmission in a driving cycle; the monitoring items of the gearbox comprise that a hydraulic torque converter is normally opened, the hydraulic torque converter is normally closed, the signal value of the hydraulic torque converter is not true, the signal value of the G7 speed is unstable, the signal value of the G7 speed is not true, the signal value of the C4 speed is unstable, the signal value of the C4 speed is not true, the signal value of the output shaft speed is unstable, the signal value of the output shaft speed is not true, and incorrect clutch combination is realized;

in step S1, the calculation of the IUPR ratio value for each monitoring item of the transmission includes the steps of:

the IUPR ratio of the transmission monitoring term is:

and a part of monitoring items of the gearbox are provided with special conditions, a gearbox controller judges whether the minimum activation condition of the gearbox monitoring items is met or not according to the received multiple detection signals, and if so, the special conditions are met.

2. A method of monitoring the IUPR ratio of a transmission as claimed in claim 1, wherein: the general conditions include:

(4) The IUPR denominator counter of the engine is updated.