CN113212445A - Electronic gear shifter Hall element fault processing method and system and vehicle - Google Patents
Electronic gear shifter Hall element fault processing method and system and vehicle Download PDFInfo
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- CN113212445A CN113212445A CN202110507412.4A CN202110507412A CN113212445A CN 113212445 A CN113212445 A CN 113212445A CN 202110507412 A CN202110507412 A CN 202110507412A CN 113212445 A CN113212445 A CN 113212445A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
- B60W2050/0215—Sensor drifts or sensor failures
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Abstract
The invention discloses a method and a system for processing faults of Hall elements of an electronic gear shifter and a vehicle, wherein the electronic gear shifter is internally provided with five gears, each gear is provided with one Hall element, and the method specifically comprises the following steps: detecting whether the five Hall elements are normal or not; if any Hall element is detected to be in fault, the electronic gear shifter is in a Degraded state working mode; the electronic gear shifter monitors the activation state of each Hall element, and if no Hall element is activated at present, the position of the gear shifting lever at present is judged according to the last activation state of the Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal. The method effectively solves the problem that when one Hall element in the electronic gear shifter fails, the requirement of a normal gear shifting function can still be met, the problem that the electronic gear shifter fails in function when a single Hall element fails is solved, and the product cost and the structural complexity are not increased.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a method and a system for processing faults of a Hall element of an electronic gear shifter and a vehicle.
Background
The electronic gear shifter converts a gear shifting request of a driver into a gear shifting request electric signal, and then the automobile bus transmits the request electric signal to the execution end to realize a gear shifting function. Generally, hall elements arranged at different positions are adopted inside the electronic gear shifter to identify different positions of a gear shifting lever, and when a single hall element or a part of the hall elements are in failure, the electronic gear shifter cannot normally identify a gear shifting request of a driver, and a gear shifting function is failed. Conventional solutions have been to increase the hall element redundancy design by placing two or even more hall elements at various locations. For example, patent document CN111322386A discloses a triple hall redundancy electronic shifter and a method for using the same, wherein three hall elements can detect in each shift position by utilizing a triple hall redundancy design scheme, when one or two hall elements fail, the remaining hall element output value can be used to determine who fails, and the remaining hall elements are normal, the shifter can still operate normally, although the triple hall redundancy electronic shifter reduces the failure probability of the shifter, more components are added to increase the product cost and the structural complexity.
Disclosure of Invention
The invention aims to provide a method and a system for processing faults of Hall elements of an electronic gear shifter and a vehicle, which can effectively meet the requirement of a normal gear shifting function when one Hall element in the electronic gear shifter fails, solve the problem of functional failure of the electronic gear shifter when a single Hall element fails, and do not increase the product cost and the structural complexity.
In order to achieve the above object, the present invention provides a method for processing a failure of a hall element of an electronic shifter, the electronic shifter comprises five shift lever positions, the five shift lever positions are a first second-order position, a first-order position, a middle position, a second first-order position and a second-order position from front to back, the first second-order position is provided with a first hall element, the first-order position is provided with a second hall element, the middle position is provided with a third hall element, the second first-order position is provided with a fourth hall element, the second-order position is provided with a fifth hall element, the first hall element outputs a forward second-order position signal when activated, the second hall element outputs a forward first-order position signal when activated, the third hall element outputs a middle position signal when activated, the fourth hall element outputs a backward first-order position signal when activated, and when the fifth Hall element is activated, a backward-pushing second-order position signal is output, and the method comprises the following steps:
detecting whether the first Hall element, the second Hall element, the third Hall element, the fourth Hall element and the fifth Hall element are normal or not;
if any one of the first Hall element, the second Hall element, the third Hall element, the fourth Hall element and the fifth Hall element is detected to be in a Degraded state working mode, and the electronic gear shifter is in a Degraded state working mode;
the electronic gear shifter monitors the activation state of each Hall element, and if no Hall element is activated at present, the position of the gear shifting lever at present is judged according to the last activation state of the Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal.
Further, the following steps are also performed:
if the faults of the first Hall element and the fifth Hall element, or the faults of the first Hall element and the fourth Hall element, or the faults of the second Hall element and the fifth Hall element are detected, the electronic gear shifter is in a Degraded state working mode;
the electronic gear shifter monitors the activation states of a current Hall element and a previous Hall element, and if no Hall element is activated at present, the position of the current gear shifting lever is judged according to the activation state of the previous Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal.
Further, the following steps are also performed:
if the faults of the first Hall element and the third Hall element, the faults of the second Hall element and the fourth Hall element, the faults of the third Hall element and the fourth Hall element, or the faults of the third Hall element and the fifth Hall element are detected, the electronic gear shifter is in a Limphome state working mode;
detecting whether a Hall element is activated or not, and outputting a forward-pushing first-order position signal if the electronic gear shifter detects that the first Hall element or the second Hall element is activated; if the electronic gear shifter detects that the fourth Hall element or the fifth Hall element is activated, a backward-pushing first-order position signal is output; and if the electronic gear shifter detects that the third Hall element is activated or all the Hall elements are not activated, outputting a middle position signal.
Further, the following steps are also performed:
if the faults of the second Hall element, the third Hall element and the fifth Hall element, or the faults of the second Hall element, the third Hall element and the fourth Hall element, or the faults of the first Hall element, the third Hall element and the fifth Hall element, or the faults of the first Hall element, the third Hall element and the fourth Hall element are detected, the electronic gear shifter is in a Limphome state working mode;
detecting whether a Hall element is activated or not, and outputting a forward-pushing first-order position signal if the electronic gear shifter detects that the first Hall element or the second Hall element is activated; if the electronic gear shifter detects that the fourth Hall element or the fifth Hall element is activated, a backward-pushing first-order position signal is output; and if the electronic gear shifter detects that the third Hall element is activated or all the Hall elements are not activated, outputting a middle position signal.
Further, the following steps are also performed:
if the faults of the first Hall element and the second Hall element, or the faults of the fourth Hall element and the fifth Hall element, or the faults of the third Hall element, the fourth Hall element and the fifth Hall element, or the faults of the second Hall element, the fourth Hall element and the fifth Hall element, or the faults of the first Hall element, the second Hall element and the fifth Hall element, or the faults of the first Hall element, the fourth Hall element and the fifth Hall element, or the faults of the first Hall element, the second Hall element and the fourth Hall element, or the faults of the first Hall element, the second Hall element and the third Hall element, or the faults of the second Hall element, the third Hall element, the fourth Hall element and the fifth Hall element, or the faults of the first Hall element, the second Hall element, When the fourth Hall element and the fifth Hall element have faults, or the first Hall element, the second Hall element, the third Hall element and the fourth Hall element have faults, or the first Hall element, the second Hall element, the third Hall element, the fourth Hall element and the fifth Hall element have faults, the electronic gear shifter is in a Fault state working mode, and at the moment, the electronic gear shifter fails in function and sends a Fault prompt signal.
Further, the following steps are also performed:
and if all the Hall elements are detected to be Normal, the electronic gear shifter is in a Normal state working mode, and the electronic gear shifting outputs corresponding position signals according to the activation state of the Hall elements at all the positions.
Further, whether the first hall element, the second hall element, the third hall element, the fourth hall element and the fifth hall element are normal or not is detected, and the following steps are specifically executed:
whether the MCU reads a specific voltage value corresponding to each Hall element or not;
if the specific voltage value is read, determining that the corresponding Hall element has a fault according to the specific voltage value; and if any specific voltage value is not read, the first Hall element, the second Hall element, the third Hall element, the fourth Hall element and the fifth Hall element are normal.
The invention also provides a system for processing the fault of the Hall element of the electronic gear shifter, which comprises the following components:
the MCU is used for detecting whether a Hall element in the electronic gear shifter is normal or not;
the electronic gear shifter is used for judging the working mode of the electronic gear shifter and sending a corresponding position signal or a fault prompt signal; the electronic gear shifter comprises five gear shifting lever positions, wherein the five gear shifting lever positions are a first second-order position, a first-order position, a middle position, a second first-order position and a second-order position from front to back in sequence, a first Hall element is arranged on the first second-order position, a second Hall element is arranged on the first-order position, a third Hall element is arranged on the middle position, a fourth Hall element is arranged on the second first-order position, a fifth Hall element is arranged on the second-order position, a forward pushing second-order position signal is output when the first Hall element is activated, a forward pushing first-order position signal is output when the second Hall element is activated, a middle position signal is output when the third Hall element is activated, a backward pushing first-order position signal is output when the fourth Hall element is activated, and a backward pushing second-order position signal is output when the fifth Hall element is activated;
the electronic gear shifter is connected with the MCU, and the electronic gear shifter Hall element fault processing system can execute the steps of the electronic gear shifter Hall element fault processing method.
The invention further provides a vehicle comprising the electronic gear shifter Hall element fault processing system.
Compared with the prior art, the invention has the following advantages:
according to the method and the system for processing the faults of the Hall elements of the electronic gear shifter and the vehicle, all the Hall elements are detected, when one Hall element in the electronic gear shifter has a fault, the electronic gear shifter is in a Degraded state working mode, and the requirements of a normal gear shifting function can be still met according to corresponding processing steps; when two Hall elements in the electronic gear shifter fail, the electronic gear shifter can be judged to be in a Degraded state working mode or a Limphome state working mode or a Fault state working mode according to the types of the Hall elements, and if the electronic gear shifter is in the Degraded state working mode or the Limphome state working mode, the requirements of a normal gear shifting function can still be met according to corresponding processing steps; if the mobile terminal is in the Fault state working mode, no position signal is sent out, so that the safety is ensured; when three Hall elements in the electronic gear shifter fail, the electronic gear shifter can be judged to be in a Limphome state working mode or a Fault state working mode according to the types of the Hall elements, and if the electronic gear shifter is in the Limphome state working mode, the requirements of a normal gear shifting function can still be met according to corresponding processing steps; if the mobile terminal is in the Fault state working mode, no position signal is sent out, so that the safety is ensured; when more than four Hall elements in the electronic gear shifter fail, the electronic gear shifter is in a Fault state working mode, and does not send a position signal, so that the safety is ensured; the method effectively solves the problem of functional failure of the gear shifter when a single or partial Hall element fails, and does not increase the product cost and the structural complexity.
Drawings
FIG. 1 is a flow chart of a method of fault handling of a Hall element of an electronic shifter of the present invention;
FIG. 2 is a schematic structural view of the arrangement of the shift lever and Hall element in the Hall element fault handling system of the electronic shifter of the present invention;
FIG. 3 is a schematic view of the electronic shifter of the present invention in a Degraded state;
FIG. 4 is a schematic view of the electronic shifter of the present invention in a Limphome state
FIG. 5 is a schematic view of the electronic shifter of the present invention in a Fault state;
fig. 6 is a schematic view of the gear position of the electronic shifter of the present invention;
FIG. 7 is a relationship between the position of the gear lever and the driver's desire to engage a gear in accordance with the present invention.
In the figure:
IC 1-first hall element, IC 2-second hall element, IC 3-third hall element, IC 4-fourth hall element, IC 5-fifth hall element.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The TCU (Transmission Control Unit) recognizes the shift demand of the driver by reading a position signal output from a shift lever, and implements a shift function. When the magnet on the gear shift lever is close to the Hall element, the Hall element can be activated, the gear shift lever has a mechanical rotation sequence, and the Hall element is activated sequentially and is bound to be changed one by IC1-IC2-IC3-IC4-IC 5. For example, if IC2 is currently active, then the next active must be either IC1 or IC3 and cannot jump to either IC4 or IC 5. The MCU recognizes that the current IC3 is activated and the next state is necessarily either IC2 or IC 4.
In order to shift the transmission into all gears (RND gears), at least 3 position signals of the shift lever are required: forward, neutral, backward, all hall normal cases: the forward direction is provided by the first hall element IC1 and the second hall element IC2, the middle direction is provided by the third hall element IC3, and the backward direction is provided by the fourth hall element IC4 and the fifth hall element IC 5. Therefore, in order to ensure that the transmission can be normally switched to all gears, the shift lever must meet the condition that the most basic position signal can be normally output: the shifter must have at least one position signal for proper output both forward and backward, i.e., at least one of IC1 and IC2 must be normal, and at least one of IC4 and IC5 must be normal.
Referring to fig. 1 to 6, the present embodiment discloses a method for handling a failure of a hall element of an electronic shifter, the electronic shifter includes five shift lever positions, the five shift lever positions are sequentially a first second-order position, a first-order position, a middle-order position, a second first-order position and a second-order position from front to back, the first second-order position is provided with a first hall element IC1, the first-order position is provided with a second hall element IC2, the middle-order position is provided with a third hall element IC3, the second first-order position is provided with a fourth hall element IC4, the second-order position is provided with a fifth hall element IC5, the first hall element IC1 outputs a forward second-order position signal when activated, the second hall element IC2 outputs a forward first-order position signal when activated, the third hall element IC3 outputs a middle-order position signal when activated, the fourth hall element IC4 outputs a backward first-order position signal when activated, when the fifth Hall element IC5 is activated, it outputs a backward second-order position signal, and the method includes the following steps:
detecting whether or not the first hall element IC1, the second hall element IC2, the third hall element IC3, the fourth hall element IC4, and the fifth hall element IC5 are normal;
if any one of the first hall element IC1, the second hall element IC2, the third hall element IC3, the fourth hall element IC4 and the fifth hall element IC5 is detected to be out of order, the electronic shifter is in a Degraded state operation mode;
the electronic gear shifter monitors the activation state of each Hall element, and if no Hall element is activated at present, the position of the gear shifting lever at present is judged according to the last activation state of the Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal. When a single Hall element in the electronic gear shifter breaks down, the requirement of a normal gear shifting function can be still met, and the problem of failure of the gear shifter function is solved; the product cost and the structural complexity are not increased. The TCU performs the corresponding shift function based on the received position signal.
The forward is provided by a forward second-order position signal and a forward first-order position signal, the backward is provided by a backward first-order position signal and a backward second-order position signal, and the middle position is provided by a middle position signal.
The failed hall element in the Degraded state operating mode cannot be activated, and the corresponding shift lever position information cannot be identified.
Specifically, if a fault of the first hall element IC1 is detected, if no other hall element is activated at present and the previously activated hall element is the second hall element IC2, it is determined that the present shift lever is located at the first second-order position where the first hall element IC1 is located, and a forward second-order position signal is output;
if the fault of the second hall element IC2 is detected, if no other hall element is activated at present and the previously activated hall element is the first hall element IC1 or the third hall element IC3, judging that the current gear shifting lever is located at the first-order position where the second hall element IC2 is located and outputting a forward first-order position signal;
if the fault of the third hall element IC3 is detected, if no other hall element is activated at present and the hall element activated by the previous hall element is the fourth hall element IC4 or the second hall element IC2, judging that the current gear shift lever is located at the middle position where the third hall element IC3 is located and outputting a middle position signal;
if the fault of the fourth hall element IC4 is detected, if no other hall element is activated at present and the hall element activated by the previous hall element is the fifth hall element IC5 or the third hall element IC3, judging that the current gear shift lever is located at the second-order position where the fourth hall element IC4 is located, and outputting a backward-pushing first-order position signal;
if the fault of the fifth hall element IC5 is detected, if no other hall element is activated at present and the hall element activated by the previous hall element is the fourth hall element IC4, it is determined that the current shift lever is located at the second-order position where the fifth hall element IC5 is located, and a push-back second-order position signal is output.
In this embodiment, the following steps are also performed:
if the faults of the first Hall element IC1 and the fifth Hall element IC5, the faults of the first Hall element IC1 and the fourth Hall element IC4, or the faults of the second Hall element IC2 and the fifth Hall element IC5 are detected, the electronic gear shifter is in a Degraded state working mode;
the electronic gear shifter monitors the activation states of a current Hall element and a previous Hall element, and if no Hall element is activated at present, the position of the current gear shifting lever is judged according to the activation state of the previous Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal.
In this embodiment, the following steps are also performed:
if the faults of the first Hall element IC1 and the third Hall element IC3, the faults of the second Hall element IC2 and the third Hall element IC3, the faults of the second Hall element IC2 and the fourth Hall element IC4, the faults of the third Hall element IC3 and the fourth Hall element IC4, or the faults of the third Hall element IC3 and the fifth Hall element IC5 are detected, the electronic gear shifter is in a Limphome (limp home) state working mode;
detecting whether a Hall element is activated or not, and if the electronic gear shifter detects that the first Hall element IC1 or the second Hall element IC2 is activated, outputting a forward first-order position signal; outputting a push-back first-order position signal if the electronic shifter detects that the fourth hall element IC4 or the fifth hall element IC5 is activated; if the electronic shifter detects that the third hall element IC3 is activated or that all hall elements are not activated, a neutral position signal is output. In the Limphome mode, signals do not need to be output and the positions are accurate, and only forward (IC1 and IC2), middle (IC3 or the position of a failed Hall element) and backward (IC4 and IC5) signals can be sent.
The failed hall element in the Limphome state operating mode cannot be activated, and the corresponding shift lever position information cannot be identified.
For example: as shown in fig. 4, when the faults of IC1 and IC3 are detected, the electronic shifter is in the Limphome operating mode, at this time, the first hall element IC1 and the third hall element IC3 cannot be activated, the shift lever position signal corresponding thereto cannot be sent out as the forward-pushing first-order position signal and the neutral position signal, and by this strategy, if the second hall element IC2 is activated, the forward-pushing first-order position signal is output; outputting a pushback first order position signal if either IC4 or IC5 is activated; when the shift lever is in the IC1 and IC3 positions, no hall element is activated, and both output a neutral position signal, which, although possibly not in accordance with the expected request signal, also satisfies the most basic position signal recognition: the transmission can be switched to all gears forward, neutral and backward.
In this embodiment, the following steps are also performed:
if the faults of the second hall element IC2, the third hall element IC3 and the fifth hall element IC5, the faults of the second hall element IC2, the third hall element IC3 and the fourth hall element IC4, the faults of the first hall element IC1, the third hall element IC3 and the fifth hall element IC5, or the faults of the first hall element IC1, the third hall element IC3 and the fourth hall element IC4 are detected, the electronic gear shifter is in a Limphome (limp home) state working mode;
detecting whether a Hall element is activated or not, and if the electronic gear shifter detects that the first Hall element IC1 or the second Hall element IC2 is activated, outputting a forward first-order position signal; outputting a push-back first-order position signal if the electronic shifter detects that the fourth hall element IC4 or the fifth hall element IC5 is activated; if the electronic shifter detects that the third hall element IC3 is activated or that all hall elements are not activated, a neutral position signal is output.
As shown in fig. 7, a gear relation diagram that the driver desires to engage is identified for the position signal that the transmission acquires from the electronic gear shifter in combination with the current gear of the vehicle. For example, the transmission recognizes that the current gear is D, recognizes that the driver desires to shift to N if the forward first-step position signal is received, recognizes that the driver desires to shift to R if the forward second-step position signal is received, and recognizes that the driver desires to maintain D if the reverse first-step position signal or the reverse second-step position signal is received. The position signal can only be the gear expected by the driver, and whether the gear is switched to the expected gear or not, and the TCU needs to comprehensively judge according to the current vehicle state.
In this embodiment, the following steps are also performed:
if a failure of the first hall element IC1 and the second hall element IC2, or a failure of the fourth hall element IC4 and the fifth hall element IC5, or a failure of the third hall element IC3, the fourth hall element IC4 and the fifth hall element IC5, or a failure of the second hall element IC2, the fourth hall element IC4 and the fifth hall element IC5, or a failure of the first hall element IC5, the second hall element IC5 and the fifth hall element IC5, or a failure of the first hall element IC5, the fourth hall element IC5 and the fifth hall element IC5, or a failure of the first hall element IC5, the second hall element IC5 and the fourth hall element IC5, or a failure of the first hall element IC5, the second hall element IC5 and the third hall element IC5, or a failure of the second hall element IC5, the third hall element IC5, the fourth hall element IC5, the fifth hall element IC5, the fourth hall element IC5, or the fourth hall element IC5, or when the first hall element IC1, the second hall element IC2, the fourth hall element IC4 and the fifth hall element IC5 fail, or the first hall element IC1, the second hall element IC2, the third hall element IC3 and the fifth hall element IC5 fail, or the first hall element IC1, the second hall element IC2, the third hall element IC3 and the fourth hall element IC4 fail, or the first hall element IC1, the second hall element IC2, the third hall element IC3, the fourth hall element IC4 and the fifth hall element IC5 fail, the electronic gear shifter is in a Fault state working mode, and at the moment, the electronic gear shifter fails in function, and sends out a Fault prompt signal. For example: as shown in fig. 5, when the failure of the first hall element IC1 and the second hall element IC2 is detected, the electronic shifter is in the Fault operation mode, in which the first hall element IC1 and the second hall element IC2 cannot be activated, and the shift lever position signal corresponding thereto cannot be issued, and in which no position signal is output even if the electronic shifter detects that the hall elements in other normal states are activated. And in a Fault state working mode, in order to ensure safety, a position signal is not sent even if a Hall sensor is activated.
In this embodiment, the following steps are also performed:
and if all the Hall elements are detected to be Normal, the electronic gear shifter is in a Normal state working mode, and the electronic gear shifting outputs corresponding position signals according to the activation state of the Hall elements at all the positions.
The electronic gear shifter is in a Normal state working mode and specifically executes the following steps: when a driver operates the gear shifting lever to push forwards to a first second-order position, the first Hall element IC1 is activated to output a forward second-order position signal, and the TCU reads the forward second-order position signal and then executes a gear shifting function corresponding to the forward second-order position signal; when the driver operates the gear shifting lever to push forwards to a first-step position, the second Hall element IC2 is activated to output a forward first-step position signal, and the TCU reads the forward first-step position signal and then executes a gear shifting function corresponding to the forward first-step position signal; when the driver does not operate the gear shift lever, the gear shift lever is in a middle position (a self-resetting point), the third Hall element IC3 is activated, a middle position signal is output, and the TCU reads the middle position signal and then executes a gear shifting function corresponding to the middle position signal; when the driver operates the gear shifting lever to push backwards to a second-order position, the fourth Hall element IC4 is activated to output a backward first-order position signal, and the TCU reads the backward first-order position signal and then executes a gear shifting function corresponding to the backward first-order position signal; when the driver operates the gear shifting lever to push backwards to the second-order position, the fifth Hall element IC5 is activated, a backward pushing second-order position signal is output, and the TCU reads the backward pushing second-order position signal and then executes a gear shifting function corresponding to the backward pushing second-order position signal.
In this embodiment, the following steps are specifically performed to detect whether the first hall element IC1, the second hall element IC2, the third hall element IC3, the fourth hall element IC4, and the fifth hall element IC5 are normal:
whether the MCU reads a specific voltage value corresponding to each Hall element or not;
if the specific voltage value is read, determining that the corresponding Hall element has a fault according to the specific voltage value; if any specific voltage value is not read, the first hall element IC1, the second hall element IC2, the third hall element IC3, the fourth hall element IC4, and the fifth hall element IC5 are all normal. The Hall element has a self-diagnosis function, a specific voltage value (between activation and non-activation) can be output when the Hall element fails, and the MCU judges that the Hall element fails when the MCU reads the voltage value.
Referring to fig. 2 to 5, the present embodiment further discloses an electronic shifter hall element fault handling system, including:
the MCU is used for detecting whether a Hall element in the electronic gear shifter is normal or not;
the electronic gear shifter is used for judging the working mode of the electronic gear shifter and sending a corresponding position signal or a fault prompt signal; the electronic gear shifter comprises five gear shifting lever positions which are a first second-order position, a first-order position, a middle position, a second first-order position and a second-order position from front to back in sequence, a first Hall element IC1 is arranged at the first second-order position, a second Hall element IC2 is arranged at the first-order position, a third Hall element IC3 is arranged at the middle position, a fourth Hall element IC4 is arranged at the second first-order position, a fifth Hall element IC5 is arranged at the second-order position, the first hall element IC1 outputs a push-forward second-order position signal when activated, the second hall element IC2 outputs a push-forward first-order position signal when activated, the third hall element IC3 outputs a middle position signal when activated, the fourth hall element IC4 outputs a push-backward first-order position signal when activated, and the fifth hall element IC5 outputs a push-backward second-order position signal when activated;
the electronic gear shifter Hall element fault processing system is connected with the MCU and can execute the steps of the electronic gear shifter Hall element fault processing method.
The embodiment also discloses a vehicle which comprises the electronic gear shifter Hall element fault processing system.
According to the method and the system for processing the faults of the Hall elements of the electronic gear shifter and the vehicle, all the Hall elements are detected, when one Hall element in the electronic gear shifter has a fault, the electronic gear shifter is in a Degraded state working mode, and the requirements of a normal gear shifting function can be still met according to corresponding processing steps; when two Hall elements in the electronic gear shifter fail, the electronic gear shifter can be judged to be in a Degraded state working mode or a Limphome state working mode or a Fault state working mode according to the types of the Hall elements, and if the electronic gear shifter is in the Degraded state working mode or the Limphome state working mode, the requirements of a normal gear shifting function can still be met according to corresponding processing steps; if the mobile terminal is in the Fault state working mode, no position signal is sent out, so that the safety is ensured; when three Hall elements in the electronic gear shifter fail, the electronic gear shifter can be judged to be in a Limphome state working mode or a Fault state working mode according to the types of the Hall elements, and if the electronic gear shifter is in the Limphome state working mode, the requirements of a normal gear shifting function can still be met according to corresponding processing steps; if the mobile terminal is in the Fault state working mode, no position signal is sent out, so that the safety is ensured; when more than four Hall elements in the electronic gear shifter fail, the electronic gear shifter is in a Fault state working mode, and does not send a position signal, so that the safety is ensured; the method effectively solves the problem of functional failure of the gear shifter when a single or partial Hall element fails, and does not increase the product cost and the structural complexity.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A fault processing method for Hall elements of an electronic gear shifter comprises five gear shifter positions which are a first second-order position, a first-order position, a middle-order position, a second first-order position and a second-order position from front to back in sequence, and is characterized in that a first Hall element (IC1) is arranged at the first second-order position, a second Hall element (IC2) is arranged at the first-order position, a third Hall element (IC3) is arranged at the middle-order position, a fourth Hall element (IC4) is arranged at the second first-order position, a fifth Hall element (IC5) is arranged at the second-order position, a forward second-order position signal is output when the first Hall element (IC1) is activated, a forward first-order position signal is output when the second Hall element (IC2) is activated, a middle-order position signal is output when the third Hall element (IC3) is activated, the fourth Hall element (IC4) outputs a pushback first-order position signal when activated, and the fifth Hall element (IC5) outputs a pushback second-order position signal when activated, the method comprising the steps of:
detecting whether the first hall element (IC1), the second hall element (IC2), the third hall element (IC3), the fourth hall element (IC4), and the fifth hall element (IC5) are normal;
if any one of the first Hall element (IC1), the second Hall element (IC2), the third Hall element (IC3), the fourth Hall element (IC4) and the fifth Hall element (IC5) is detected to be in a Degraded state working mode;
the electronic gear shifter monitors the activation state of each Hall element, and if no Hall element is activated at present, the position of the gear shifting lever at present is judged according to the last activation state of the Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal.
2. The electronic shifter hall element fault handling method of claim 1, further performing the steps of:
if the faults of the first Hall element (IC1) and the fifth Hall element (IC5), or the faults of the first Hall element (IC1) and the fourth Hall element (IC4), or the faults of the second Hall element (IC2) and the fifth Hall element (IC5) are detected, the electronic gear shifter is in a Degraded state working mode;
the electronic gear shifter monitors the activation states of a current Hall element and a previous Hall element, and if no Hall element is activated at present, the position of the current gear shifting lever is judged according to the activation state of the previous Hall element and a current position signal is output; and if the Hall element is activated at present, outputting a current position signal.
3. The electronic shifter hall element fault handling method of claim 1 or 2, characterized in that the following steps are also performed:
if the first Hall element (IC1) and the third Hall element (IC3) are detected to be in fault, or the second Hall element (IC2) and the third Hall element (IC3) are detected to be in fault, or the second Hall element (IC2) and the fourth Hall element (IC4) are detected to be in fault, or the third Hall element (IC3) and the fourth Hall element (IC4) are detected to be in fault, or the third Hall element (IC3) and the fifth Hall element (IC5) are detected to be in fault, the electronic gear shifter is in a Limphome state working mode;
detecting whether a Hall element is activated or not, and outputting a forward first-order position signal if the electronic gear shifter detects that the first Hall element (IC1) or the second Hall element (IC2) is activated; outputting a pushback first-order position signal if the electronic shifter detects that the fourth hall element (IC4) or the fifth hall element (IC5) is activated; if the electronic shifter detects that the third hall element (IC3) is activated or that all hall elements are not activated, a neutral position signal is output.
4. The electronic shifter hall element fault handling method of claim 3, further performing the steps of:
if the faults of the second Hall element (IC2), the third Hall element (IC3) and the fifth Hall element (IC5), or the faults of the second Hall element (IC2), the third Hall element (IC3) and the fourth Hall element (IC4), or the faults of the first Hall element (IC1), the third Hall element (IC3) and the fifth Hall element (IC5), or the faults of the first Hall element (IC1), the third Hall element (IC3) and the fourth Hall element (IC4) are detected, the electronic gear shifter is in a Limphome state working mode;
detecting whether a Hall element is activated or not, and outputting a forward first-order position signal if the electronic gear shifter detects that the first Hall element (IC1) or the second Hall element (IC2) is activated; outputting a pushback first-order position signal if the electronic shifter detects that the fourth hall element (IC4) or the fifth hall element (IC5) is activated; if the electronic shifter detects that the third hall element (IC3) is activated or that all hall elements are not activated, a neutral position signal is output.
5. The electronic shifter hall element fault handling method of claim 1 or 2 or 4, characterized in that the following steps are also performed:
if the faults of the first Hall element (IC1) and the second Hall element (IC2), the fourth Hall element (IC4) and the fifth Hall element (IC5), the third Hall element (IC3), the fourth Hall element (IC4) and the fifth Hall element (IC5), the second Hall element (IC2), the fourth Hall element (IC4) and the fifth Hall element (IC5), the first Hall element (IC1), the second Hall element (IC2) and the fifth Hall element (IC5), the first Hall element (IC1), the fourth Hall element (IC4) and the fifth Hall element (IC5), the first Hall element (IC1), the second Hall element (IC2) and the fourth Hall element (IC4), the first Hall element (IC1), the second Hall element (IC 5842) and the third Hall element (IC2) or the third Hall element (IC 599) or the third Hall element (IC2) are detected, When the third hall element (IC3), the fourth hall element (IC4) and the fifth hall element (IC5) fail, or the first hall element (IC1), the third hall element (IC3), the fourth hall element (IC4) and the fifth hall element (IC5) fail, or the first hall element (IC1), the second hall element (IC2), the fourth hall element (IC4) and the fifth hall element (IC5) fail, or the first hall element (IC1), the second hall element (IC2), the third hall element (IC3) and the fifth hall element (IC5) fail, or the first hall element (IC1), the second hall element (IC2), the third hall element (IC3) and the fourth hall element (IC4) fail, or the first hall element (IC1), the second hall element (IC2), the third hall element (IC3), the fourth hall element (IC4) and the fifth hall element (IC5) fail, the electronic gear shifter is in a Fault state working mode, and at the moment, the electronic gear shifter fails in function and sends a Fault prompt signal.
6. The electronic shifter hall element fault handling method of claim 1 or 2 or 4, characterized in that the following steps are also performed:
and if all the Hall elements are detected to be Normal, the electronic gear shifter is in a Normal state working mode, and the electronic gear shifting outputs corresponding position signals according to the activation state of the Hall elements at all the positions.
7. The electronic shifter hall element fault handling method of claim 1, wherein the detecting whether the first hall element (IC1), the second hall element (IC2), the third hall element (IC3), the fourth hall element (IC4) and the fifth hall element (IC5) are normal, specifically performs the steps of:
whether the MCU reads a specific voltage value corresponding to each Hall element or not;
if the specific voltage value is read, determining that the corresponding Hall element has a fault according to the specific voltage value; if any specific voltage value is not read, the first hall element (IC1), the second hall element (IC2), the third hall element (IC3), the fourth hall element (IC4), and the fifth hall element (IC5) are all normal.
8. An electronic shifter hall element fault handling system, comprising:
the MCU is used for detecting whether a Hall element in the electronic gear shifter is normal or not;
the electronic gear shifter is used for judging the working mode of the electronic gear shifter and sending a corresponding position signal or a fault prompt signal; the electronic gear shifter comprises five gear shifting lever positions, wherein the five gear shifting lever positions are a first second-order position, a first-order position, a middle-order position, a second first-order position and a second-order position from front to back in sequence, the first second-order position is provided with a first Hall element (IC1), the first-order position is provided with a second Hall element (IC2), the middle-order position is provided with a third Hall element (IC3), the second first-order position is provided with a fourth Hall element (IC4), the second-order position is provided with a fifth Hall element (IC5), the first Hall element (IC1) outputs a forward pushing second-order position signal when activated, the second Hall element (IC2) outputs a forward pushing first-order position signal when activated, the third Hall element (IC3) outputs a middle-order position signal when activated, the fourth Hall element (IC4) outputs a backward pushing first-order position signal when activated, a fifth Hall element (IC5) outputs a push-back second-order position signal when activated;
the electronic shifter hall element fault handling system is connected with the MCU and is capable of executing the steps of the electronic shifter hall element fault handling method of any one of claims 1 to 7.
9. A vehicle comprising the electronic shifter hall element fault handling system of claim 8.
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