CN115716456A - System and method for activating self-learning function of AMT (automated mechanical transmission) gradient sensor of commercial vehicle - Google Patents
System and method for activating self-learning function of AMT (automated mechanical transmission) gradient sensor of commercial vehicle Download PDFInfo
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Abstract
The invention provides a system and a method for activating a self-learning function of an AMT (automated mechanical transmission) gradient sensor of a commercial vehicle, which mainly solve the technical problems that the conventional method for activating the self-learning function of the gradient sensor is realized by using professional equipment such as a computer or calibration equipment and the like, and the self-learning function of the gradient sensor cannot be activated without the professional equipment. The system comprises function keys in a vehicle cab, a TCU (transmission control unit) controller in an AMT (automated mechanical transmission) and a gradient sensor; the gradient sensor is arranged on a PCB in the TCU controller; the function key is electrically connected with a first input end of the TCU controller and used for sending an instruction for activating the self-learning function of the gradient sensor to the TCU controller through the function key; and the output end of the gradient sensor is electrically connected with the second input end of the TCU controller and used for transmitting the information detected by the gradient sensor to the TCU controller for self-learning of the gradient sensor.
Description
Technical Field
The invention relates to a system and a method for activating a self-learning function, in particular to a system and a method for activating a self-learning function of an AMT (automated mechanical transmission) gradient sensor of a commercial vehicle.
Background
An AMT (automated mechanical transmission) is a transmission device capable of realizing automatic gear shifting according to a vehicle running state and a vehicle running road environment, the road gradient is an important attribute parameter of the road environment where a vehicle runs, the road gradient can be accurately identified, the AMT is a precondition and an important guarantee that the AMT can accurately shift gears, the AMT is an important technical parameter input of a related control strategy for reducing the oil consumption of the whole vehicle, and the dynamic property and the economical property of the vehicle are directly influenced.
At present, the mainstream AMT at home and abroad measures the transverse and longitudinal acceleration of a vehicle by an acceleration sensor arranged on a TCU (transmission control unit) and estimates the gradient of a road by a related calculation method, or calculates the gradient of the road by arranging a gradient sensor; due to the fact that the installation angles of a transmission or a TCU on the whole vehicle are different and the gravity center position of the vehicle deviates after goods are loaded, deviation exists in the initial position of the gradient sensor, and therefore self-calibration or self-learning of the gradient sensor is achieved through application layer software; the existing self-learning method of the activated gradient sensor mainly comprises the following steps: activation by calibration activation or by service tool UDS command activation etc.
However, the conventional method for activating self-learning of the gradient sensor needs to be implemented by using professional equipment such as a computer or calibration equipment, and cannot activate the self-learning function of the gradient sensor without the professional equipment.
Disclosure of Invention
The invention aims to solve the technical problems that the conventional method for activating self-learning of a gradient sensor needs to be realized by using professional equipment such as a computer or calibration equipment and the like, and the self-learning function of the gradient sensor cannot be activated under the condition of no professional equipment, and provides a system for activating the self-learning function of an AMT (automated mechanical transmission) gradient sensor of a commercial vehicle.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a system for activating the self-learning function of an AMT gradient sensor of a commercial vehicle is characterized in that:
the system comprises function keys in a vehicle cab, a TCU (transmission control unit) controller in an AMT (automated mechanical transmission) and a gradient sensor; the gradient sensor is arranged on a PCB in the TCU controller;
the function key is electrically connected with a first input end of the TCU controller and used for sending an instruction for activating the self-learning function of the gradient sensor to the TCU controller through the function key;
and the output end of the gradient sensor is electrically connected with the second input end of the TCU controller and used for transmitting the information detected by the gradient sensor to the TCU controller for self-learning of the gradient sensor.
Further, the instrument panel in the vehicle cab is also included;
the output end of the TCU controller is connected with the input end of the instrument panel through the CAN bus and used for sending a self-learning state signal of the gradient sensor of the TCU controller to the instrument panel for displaying.
Furthermore, the function key is an EP key on the handle;
the EP button is electrically connected with a handle controller on the handle, and the handle controller is connected with the TCU controller through a CAN bus.
Meanwhile, the invention also provides a method for activating the self-learning function of the AMT gradient sensor of the commercial vehicle, which is based on a system for activating the self-learning function of the AMT gradient sensor of the commercial vehicle and is characterized by comprising the following steps:
step 1, pressing a function key to send an activation signal of a self-learning function of a gradient sensor to a TCU (temperature control unit) controller;
step 2, identifying whether the activation signal sent by the function key is an activation signal meeting a preset pressing mode through the TCU controller, and if so, successfully sending an instruction for activating a self-learning function of the gradient sensor to the TCU controller; if not, returning to the step 1 until the activation signal sent by the function key is identified to meet the activation signal of the preset pressing mode;
step 3, judging whether the current working condition of the vehicle meets the working condition required by the self-learning condition through the TCU controller, and if so, successfully activating the self-learning function of the gradient sensor; if not, the self-learning function of the gradient sensor cannot be activated, and the step 1 is returned;
and 4, completing the activation of the self-learning function of the gradient sensor.
Further, in step 2, the preset pressing manner is: the function key is continuously pressed for four times at the interval of 0.5s-1s, the function key is waited for 3s-5s, and the function key is pressed again.
Further, in step 3, the working condition required by the self-learning condition is that the vehicle is on a horizontal road surface, and the hand brake is ignited and released.
Further, step 3, the TCU controller sends a signal for activating the self-learning state of the gradient sensor to an instrument panel for displaying.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the self-learning function of the gradient sensor is activated through the function key, so that an engineer and a driver can conveniently activate the self-learning function of the gradient sensor to the maximum extent when required, and the self-learning function of the gradient sensor can be activated when no professional tools such as a computer, calibration equipment and the like are available; and the self-learning state is displayed through the instrument panel, so that whether the self-learning function of the gradient sensor is activated or not can be judged visually through the instrument panel, and the gradient information of the vehicle can be calibrated in time.
2. According to the invention, the function key is pressed in a preset pressing mode to send the instruction for activating the self-learning function of the gradient sensor to the TCU, so that the unexpected self-learning function activating instruction of the gradient sensor, which is sent by mistaken touch, can be effectively prevented.
Drawings
FIG. 1 is a schematic diagram of a system for activating a self-learning function of an AMT grade sensor of a commercial vehicle according to the present invention;
FIG. 2 is a flow chart of a method for activating the self-learning function of the AMT gradient sensor of the commercial vehicle.
Detailed Description
In order to make the objects, advantages and features of the present invention more apparent, a system and a method for activating the self-learning function of the AMT grade sensor of the commercial vehicle according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following detailed description. It should be noted that: the drawings are in simplified form and are not to precise scale, the intention being solely for the convenience and clarity of illustrating embodiments of the invention; second, the structures shown in the drawings are often part of actual structures.
As shown in FIG. 1, the system for activating the self-learning function of the AMT gradient sensor of the commercial vehicle comprises a function key and an instrument panel in a vehicle cab, and a TCU (transmission control unit) controller and a gradient sensor of the AMT.
The TCU controller is arranged on a gearbox shell, CAN receive signals on a CAN bus and signals of other sensors of the gearbox, and CAN correspondingly process the received signals; the gradient sensor is an acceleration sensor assembled on a PCB of the TCU controller of the gearbox, can be used for detecting the acceleration of the gearbox in three directions and transmitting an acceleration signal to the TCU controller; the instrument panel is a device which is arranged in a vehicle cab and used for displaying vehicle state information, CAN receive a signal of a self-learning state of a gradient sensor sent by a TCU on a CAN bus, and displays specific state information.
Although the handles of the AMT of the commercial vehicle are various in forms, the AMT has the common characteristic that the AMT has EP keys for switching modes, so that the EP keys are pressed in a specific pressing mode to send an activation instruction to the gradient sensor, the convenience in triggering is ensured, the mistaken touch is prevented, and the whole system has good adaptability; thus, in this embodiment, the function keys are preferably EP keys on the handle (E in EP keys is economy mode P is power mode); of course, in other embodiments of the present invention, those skilled in the art may select an appropriate key to send an activation instruction to the gradient sensor according to actual design requirements;
an EP key in the handle is electrically connected with a handle controller in the handle, the handle controller is electrically connected with a first input end of the TCU controller through a CAN bus and used for sending an instruction for activating the self-learning function of the gradient sensor to the TCU controller through the handle; the output end of the vehicle gradient sensor is electrically connected with the second input end of the TCU controller and is used for transmitting information detected by the gradient sensor to the TCU controller for self-learning of the gradient sensor; and a third output end of the TCU controller is connected with one input end of the instrument panel through a CAN bus and used for sending a self-learning state signal of the gradient sensor of the TCU controller to the instrument panel for displaying.
As shown in FIG. 2, the method for activating the self-learning function of the AMT gradient sensor of the commercial vehicle, which is disclosed by the invention, is based on a system for activating the self-learning function of the AMT gradient sensor of the commercial vehicle, and comprises the following steps:
step 1, pressing an EP key on a handle to send an activation signal of a self-learning function of a gradient sensor to a TCU controller;
in a preferred embodiment of the present invention, the EP button on the handle is pressed by a preset press pattern to issue an instruction to the TCU to activate the self-learning function of the grade sensor: continuously pressing the EP key for four times at an interval of 0.5s-1s, and then pressing the EP key for one time after waiting for 3s-5 s; it should be noted that the pressing manner of the preset pressing manner is only one preferred embodiment of the present invention, and in other embodiments of the present invention, a person skilled in the art may also design other pressing manners according to actual design requirements, so as to meet the requirement of preventing the AMT gradient sensor from being activated by a false touch;
step 2, identifying whether the activation signal sent by the function key is an activation signal meeting a preset pressing mode through the TCU controller, and if so, successfully sending an instruction for activating a self-learning function of the gradient sensor to the TCU controller; if not, returning to the step 1 until the activation signal sent by the EP key is identified as the activation signal meeting the preset pressing mode;
step 3, judging whether the current working condition of the vehicle meets the working condition required by the self-learning condition through the TCU controller, if so, successfully activating the self-learning function of the gradient sensor, and starting the self-learning state through the TCU controller, wherein the working condition required by the self-learning condition is that the vehicle is on a horizontal road surface, is ignited and releases a hand brake in a preferred embodiment of the invention; in other embodiments of the present invention, other self-learning state criteria may also be set; sending a signal of the self-learning state to an instrument panel for displaying; if not, the self-learning function of the gradient sensor is not successfully activated, the TCU controller fails to enter self-learning, a signal which can not activate the self-learning state of the gradient sensor is sent to an instrument panel to be displayed, and the step 1 is returned;
the TCU controller sends a signal for activating the self-learning state of the gradient sensor to an instrument panel for displaying;
and 4, completing the activation of the self-learning function of the gradient sensor.
Claims (7)
1. The utility model provides a system for activating commercial car AMT slope sensor self-learning function which characterized in that:
the system comprises function keys in a vehicle cab, a TCU (transmission control unit) controller in an AMT (automated mechanical transmission) and a gradient sensor; the gradient sensor is arranged on a PCB in the TCU controller;
the function key is electrically connected with a first input end of the TCU controller and used for sending an instruction for activating the self-learning function of the gradient sensor to the TCU controller through the function key;
and the output end of the gradient sensor is electrically connected with the second input end of the TCU controller and used for transmitting information detected by the gradient sensor to the TCU controller for self-learning of the gradient sensor.
2. The system for activating the self-learning function of the AMT gradient sensor of the commercial vehicle as claimed in claim 1, is characterized in that:
the instrument panel in the vehicle cab is also included;
the output end of the TCU controller is connected with the input end of the instrument panel through the CAN bus and used for sending a self-learning state signal of the gradient sensor of the TCU controller to the instrument panel for displaying.
3. The system for activating the self-learning function of the AMT gradient sensor of the commercial vehicle as claimed in claim 2, is characterized in that:
the function key is an EP key on the handle;
the EP button is electrically connected with a handle controller on the handle, and the handle controller is connected with the TCU controller through a CAN bus.
4. A method for activating the self-learning function of an AMT gradient sensor of a commercial vehicle is based on the system for activating the self-learning function of the AMT gradient sensor of the commercial vehicle as claimed in any one of claims 1 to 3, and is characterized by comprising the following steps:
step 1, pressing a function key to send an activation signal of a self-learning function of a gradient sensor to a TCU (temperature control unit) controller;
step 2, identifying whether the activation signal sent by the function key is an activation signal meeting a preset pressing mode through the TCU controller, and if so, successfully sending an instruction for activating a self-learning function of the gradient sensor to the TCU controller; if not, returning to the step 1 until the activation signal sent by the function key is identified to meet the activation signal of the preset pressing mode;
step 3, judging whether the current working condition of the vehicle meets the working condition required by the self-learning condition through the TCU controller, and if so, successfully activating the self-learning function of the gradient sensor; if not, the self-learning function of the gradient sensor cannot be activated, and the step 1 is returned;
and 4, completing the activation of the self-learning function of the gradient sensor.
5. The method for activating the self-learning function of the AMT gradient sensor of the commercial vehicle as claimed in claim 4, wherein the method comprises the following steps:
in step 2, the preset pressing manner is as follows: the function key is continuously pressed for four times at the interval time of 0.5s-1s, the function key is waited for 3s-5s, and the function key is pressed again.
6. The method for activating the self-learning function of the AMT gradient sensor of the commercial vehicle as claimed in claim 5, wherein the method comprises the following steps:
and step 3, the working condition required by the self-learning condition is that the vehicle is on a horizontal road surface, ignition is carried out, and the hand brake is released.
7. The method for activating the self-learning function of the AMT gradient sensor of the commercial vehicle as claimed in claim 6, wherein the method comprises the following steps:
and step 3, the TCU controller sends a signal for activating the self-learning state of the gradient sensor to an instrument panel for displaying.
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