CN114439916A - Control method for providing stable kickwon signal for gearbox - Google Patents
Control method for providing stable kickwon signal for gearbox Download PDFInfo
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- CN114439916A CN114439916A CN202210069126.9A CN202210069126A CN114439916A CN 114439916 A CN114439916 A CN 114439916A CN 202210069126 A CN202210069126 A CN 202210069126A CN 114439916 A CN114439916 A CN 114439916A
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- Prior art keywords
- signal
- gearbox
- cockdwon
- kiskdwon
- opening degree
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to the technical field of gearbox gear shifting control, in particular to a control method for providing a stable kickwon signal for a gearbox. Monitoring the opening degree of an accelerator in real time, and triggering and setting a cockdwon signal when the opening degree of the accelerator is larger than or equal to a first preset opening degree value; sending the set cockdwon signal to a gearbox; after the kiskdwon signal is set for a set time length, the kiskdwon signal is automatically reset, and the reset kiskdwon signal is sent to the gearbox. The method pertinently improves the phenomenon that the AMT shifts frequently when a driver operates a large accelerator when an accelerator pedal is large or fails regardless of the fact that an accelerator pedal used by an AMT vehicle has no mechanical kickdown function or a mechanical kickdown function, and has important significance in the aspect of improving the controllability and the safety of the vehicle.
Description
Technical Field
The invention relates to the technical field of gearbox gear shifting control, in particular to a control method for providing a stable cockdwon signal for a gearbox.
Background
In the AMT application of the existing commercial vehicle matched with a pneumatic gear shifting mechanism, the vehicle CAN be matched with an accelerator with a cockdown signal damping, the technical requirement is that the throttle signal is 95% +/-2%, an ECU (electronic control unit) generally receives the accelerator signal, receives a large accelerator signal of a driver (more than or equal to 95% is also set in calibration) and processes the cockdown signal to be provided for an AMT (automated mechanical transmission) to execute dynamic downshift driving through a CAN (controller area network) message. Usually, the mechanical position of an accelerator and the signal change range are subjected to angle amplification, so that the output position variable of a kickdown point actual signal is very small, namely, the process of power cutting and recombination at the moment of gear shifting of an AMT (automated mechanical transmission) of a pneumatic system is longer than the mechanism time of an electric system and a hydraulic system when the accelerator is fully accelerated, the engine of a vehicle outputs large torque, torque interruption and large torque output under the state, and the vehicle can generate obvious jitter during the driving of the engine transceiver by combining the over-adjustment reason which is inevitably existed in the control of speed adjustment and torque adjustment by the speed adjustment characteristic of the engine; the phenomenon that the accelerator is released and then is pressed down along with the shaking of the vehicle also inevitably exists in the full accelerator operation influenced by the above, and the phenomenon is more obvious in the full accelerator operation under the uneven road or the uphill working condition. The operation is analyzed from the data of the throttle signal to obtain that the throttle signal can be instantly reduced and then the throttle is full, and as a result, the ECU can frequently switch the kick down state to be executed by the AMT, frequent or cyclic gear shifting is realized after the AMT responds to the requirement, and the characteristics of slow gear shifting of the pneumatic AMT and large torque response of the engine are combined, so that power interruption and torque mutation are inevitable in the process, and poor driving experience of the commercial vehicle is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a control method for providing a stable kiskdwon signal for a gearbox, which can improve the frequent and cyclic gear shifting phenomena of an AMT (automated mechanical transmission) of a pneumatic system of a commercial vehicle.
The invention provides a control method for providing a stable cockdwon signal for a gearbox, which has the technical scheme that:
monitoring the opening degree of an accelerator in real time, and triggering and setting a cockdwon signal when the opening degree of the accelerator is larger than or equal to a first preset opening degree value;
sending the set cockdwon signal to a gearbox;
and after the kiskdwon signal is set for a set time, automatically resetting the kiskdwon signal and sending the reset kiskdwon signal to the gearbox.
Preferably, in the course of setting the kiskdwon signal, if the accelerator opening degree is smaller than a second preset opening degree value, the kiskdwon signal is directly reset.
Preferably, in the process of setting the kiskdwon signal, if a brake signal or a retarder working signal is detected, the kiskdwon signal is directly reset.
Preferably, the first preset opening degree value is greater than the second preset opening degree value.
Preferably, the value range of the first preset opening degree value is 93-97%.
Preferably, the value range of the second preset opening degree value is 83-87%.
Preferably, the set time period is 1-3 seconds.
Preferably, the throttle opening degree signal is monitored by an engine controller or a vehicle controller.
Preferably, the cockdwon signal is output to the gearbox by an engine controller or a vehicle controller through a CAN network.
The invention has the beneficial effects that:
1. and setting and delaying for a certain time length when the cockdown signal is triggered, wherein the cockdown signal is triggered to be a high-throttle signal, and the cockdown signal is closed to be a low-throttle signal. The above strategy realizes stability processing of the cockdown signal, and meanwhile, the cockdown signal is reset when the vehicle brakes or starts the liquid slowly, so that the safety of the vehicle is guaranteed.
2. The technical requirement that the dispersion difference of an accelerator pedal with a kickdown mechanical damping used by a vehicle matched with an AMT is not easy to control can be reduced, the problem that the mechanical damping of the accelerator pedal is gradually unobvious along with the use is solved, and the accelerator pedal can be replaced by a common accelerator pedal without the kickdown mechanical damping. After the accelerator pedal is used, the OEM part cost can be reduced, and the complaint that the vehicle can normally drive after being replaced by mistake after the accelerator pedal is replaced by mistake and the gear is frequently shifted due to the same appearance of the accelerator pedal is reduced.
Drawings
FIG. 1 is a schematic control flow diagram of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
Fig. 1 shows a flow chart of a control method for providing a stable cockdwon signal to a transmission according to a preferred embodiment of the present application (fig. 1 shows a first embodiment of the present application), and for convenience of explanation, only the part relevant to the present embodiment is shown, and the following is detailed:
the invention provides a control method for providing a stable cockdwon signal to a gearbox, comprising the following steps:
monitoring the opening degree of an accelerator in real time, and triggering and setting a cockdwon signal when the opening degree of the accelerator is larger than or equal to a first preset opening degree value A;
sending the set cockdwon signal to a gearbox;
and after the kiskdwon signal is set to reach a set time length B, automatically resetting the kiskdwon signal and sending the reset kiskdwon signal to the gearbox.
Preferably, in the process of setting the kiskdwon signal, if the accelerator opening degree is smaller than a second preset opening degree value C, the kiskdwon signal is directly reset.
Preferably, in the process of setting the kiskdwon signal, if a brake signal or a retarder working signal is detected, the kiskdwon signal is directly reset.
Preferably, the first preset opening degree value is greater than the second preset opening degree value.
Preferably, the value range of the first preset opening degree value is 93-97%.
Preferably, the value range of the second preset opening degree value is 83-87%.
Preferably, the set time period is 1-3 seconds.
Preferably, the throttle opening degree signal is monitored by an engine controller or a vehicle controller.
Preferably, the cockdwon signal is output to the gearbox by an engine controller or a vehicle controller through a CAN network.
The method mainly comprises the steps of receiving an accelerator hardware signal and processing the accelerator signal through an ECU (an engine controller or a vehicle control unit), triggering stable cockdown by adopting a hysteresis and retention function, and broadcasting the cockdown signal processed by software to an AMT (automated mechanical transmission). The method pertinently improves the phenomenon that the AMT shifts frequently when a driver operates a large accelerator when an accelerator pedal is large or fails regardless of the fact that an accelerator pedal used by an AMT vehicle has no mechanical kickdown function or a mechanical kickdown function, and has important significance in the aspect of improving the controllability and the safety of the vehicle.
Example two
In this embodiment, the first preset opening value a is 95%, the second preset opening value C is 85%, and the set time length B is 2000ms (2 seconds), and the control flow is as follows:
step 1, when the accelerator opening is larger than or equal to 95% trigger, an ECU triggers a cockdown message signal, sets the message signal at the same time, and starts timing and delaying for 2S and then automatically resets when the accelerator opening is smaller than a falling edge of less than 95% and larger than or equal to 85% (C point);
step 2, in the step of setting a cockdown signal, if the opening degree of an accelerator is less than 85%, directly resetting the cockdown signal;
and 3, if the ECU detects a brake signal or a liquid slow start signal, forcibly resetting a kick down signal.
Except the specific parameters provided by the embodiment, different parameter values can be calibrated according to different vehicle types and specific application scenes, and any parameter capable of realizing the delay and hold functions of the scheme can be selected.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (9)
1. A control method for providing a stable cockdwon signal to a gearbox, characterized by:
monitoring the opening degree of an accelerator in real time, and triggering and setting a cockdwon signal when the opening degree of the accelerator is larger than or equal to a first preset opening degree value;
sending the set cockdwon signal to a gearbox;
and after the kiskdwon signal is set for a set time, automatically resetting the kiskdwon signal and sending the reset kiskdwon signal to the gearbox.
2. The control method for providing a stable cockdwon signal to a gearbox according to claim 1, characterized in that: in the process of setting the kiskdwon signal, if the accelerator opening degree is smaller than a second preset opening degree value, the kiskdwon signal is directly reset.
3. The control method for providing a stable cockdwon signal to a gearbox according to claim 1, characterized in that: in the process of setting the kiskdwon signal, if a brake signal or a retarder working signal is detected, the kiskdwon signal is directly reset.
4. The control method for providing a stable cockdwon signal to a gearbox according to claim 2, characterized in that: the first preset opening value > a second preset opening value.
5. The control method for providing a stable cockdwon signal to a gearbox according to claim 1, characterized in that: the value range of the first preset opening value is 93-97%.
6. The control method for providing a stable cockdwon signal to a gearbox according to claim 2, characterized in that: the value range of the second preset opening value is 83-87%.
7. The control method for providing a stable cockdwon signal to a gearbox according to claim 1, characterized in that: the set time is 1-3 seconds.
8. The control method for providing a stable cockdwon signal to a gearbox according to claim 1, characterized in that: and the throttle opening degree signal is monitored by an engine controller or a vehicle controller.
9. The control method for providing a stable cockdwon signal to a gearbox according to claim 1, characterized in that: the cockdwon signal is output to the gearbox by an engine controller or a vehicle controller through a CAN network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210069126.9A CN114439916A (en) | 2022-01-21 | 2022-01-21 | Control method for providing stable kickwon signal for gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210069126.9A CN114439916A (en) | 2022-01-21 | 2022-01-21 | Control method for providing stable kickwon signal for gearbox |
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| CN114439916A true CN114439916A (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210069126.9A Pending CN114439916A (en) | 2022-01-21 | 2022-01-21 | Control method for providing stable kickwon signal for gearbox |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651595A (en) * | 1983-08-31 | 1987-03-24 | Fuji Jukogyo Kabushiki Kaisha | Kickdown system for an infinitely variable transmission |
| CN1877165A (en) * | 2006-07-07 | 2006-12-13 | 浙江大学 | Combined automatic transmission gear shift method based on dual parameters |
| CN103277503A (en) * | 2013-05-17 | 2013-09-04 | 安徽江淮汽车股份有限公司 | Method and system for identifying kickdown intention of automatic speed changing vehicle driver |
| CN106043278A (en) * | 2016-06-29 | 2016-10-26 | 广西玉柴机器股份有限公司 | Instantaneous dynamic optimization control method |
| CN109795495A (en) * | 2019-01-28 | 2019-05-24 | 汉腾汽车有限公司 | A kind of automatic catch automobile forces the control method of downshift |
| CN113028048A (en) * | 2021-03-03 | 2021-06-25 | 中国北方车辆研究所 | Automatic transmission kickdown signal identification and kickdown control method thereof |
-
2022
- 2022-01-21 CN CN202210069126.9A patent/CN114439916A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651595A (en) * | 1983-08-31 | 1987-03-24 | Fuji Jukogyo Kabushiki Kaisha | Kickdown system for an infinitely variable transmission |
| CN1877165A (en) * | 2006-07-07 | 2006-12-13 | 浙江大学 | Combined automatic transmission gear shift method based on dual parameters |
| CN103277503A (en) * | 2013-05-17 | 2013-09-04 | 安徽江淮汽车股份有限公司 | Method and system for identifying kickdown intention of automatic speed changing vehicle driver |
| CN106043278A (en) * | 2016-06-29 | 2016-10-26 | 广西玉柴机器股份有限公司 | Instantaneous dynamic optimization control method |
| CN109795495A (en) * | 2019-01-28 | 2019-05-24 | 汉腾汽车有限公司 | A kind of automatic catch automobile forces the control method of downshift |
| CN113028048A (en) * | 2021-03-03 | 2021-06-25 | 中国北方车辆研究所 | Automatic transmission kickdown signal identification and kickdown control method thereof |
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