CN117366219A

CN117366219A - Method and system for judging gear effectiveness of knob type gear shifter

Info

Publication number: CN117366219A
Application number: CN202311403048.2A
Authority: CN
Inventors: 张飞; 刘万财; 吴祥旭
Original assignee: Chery New Energy Automobile Co Ltd
Current assignee: Chery New Energy Automobile Co Ltd
Priority date: 2023-10-25
Filing date: 2023-10-25
Publication date: 2024-01-09

Abstract

The invention provides a method and a system for judging the gear effectiveness of a knob type gear shifter, and relates to the technical field of automobile gear control. Comprises identifying effective position information of a knob; acquiring the current vehicle gear state, the current vehicle speed and brake signal validity state information; if the current vehicle gear state is the D gear, setting the effective gear as the R gear only when the current vehicle speed is smaller than the set value and the effective position information of the knob is the first re-rotation position, otherwise setting the effective gear as the N gear; if the current vehicle gear state is R gear, the effective gear is set as D gear only when the current vehicle speed is smaller than the set value and the effective position information of the knob is the second re-rotation position, otherwise, the effective gear is set as N gear. The invention can identify the gear position information and the residence time, identify the effective position of the gear, further judge the gear effectiveness according to the effective position of the gear and the vehicle state, and judge whether the gear has a clamping stagnation fault or not, thereby improving the safety of gear shifting control.

Description

Method and system for judging gear effectiveness of knob type gear shifter

Technical Field

The invention belongs to the technical field of automobile gear control, and particularly relates to a method and a system for judging gear effectiveness of a knob type gear shifter.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Under the wave of digitalization and intellectualization of the automobile, the gear level becomes a few reserved physical buttons in the automobile. The knob type gear shifting has the advantages of small occupied space, attractive appearance, liftable property and the like, so that the configuration rate of the knob type gear shifting is higher and higher.

The gear shifting relates to vehicle driving safety, and with the frequent use of the gear shifting mechanism, the gear shifting mechanism is blocked, and the judgment of the gear shifting effectiveness is affected. An accurate determination of whether a vehicle shift can be made will directly affect the safety of the vehicle and the effectiveness of vehicle control.

In the chinese patent application publication No. CN109578574a, a method and a system for controlling a knob shifter are disclosed, wherein the knob shifter includes P, R, N, D and S gear positions, and the method includes the steps of: acquiring a gear shifting control signal of a knob shifter; judging whether the gear state of the knob shifter and the current flameout/ignition state of the vehicle accord with a preset state, if so, shifting according to the gear shifting control signal, otherwise, shifting according to the gear state of the knob shifter and the current flameout/ignition state of the vehicle. The gear shifting is realized by rotating the knob to replace the gear shifting lever, so that the mechanical friction can be reduced, and the operation is more convenient; the conversion between the P gear and the non-P gear is realized through the lifting of the knob, so that the safety is stronger; the gear shifting and flameout/ignition states of the vehicle are monitored in real time, and driving safety is guaranteed while gear shifting is carried out.

However, the inventor found that the validity of the gear is not detected and judged in the above technical solution, and when this step is missing, the accuracy of the subsequent judgment logic will be directly affected.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the method and the system for judging the gear effectiveness of the knob type gear shifter, which can identify the position information and the position stay duration time of the gear, identify the effective position of the gear, judge the gear effectiveness according to the effective position of the gear and the state of a vehicle, judge whether the gear has a clamping stagnation fault or not, and improve the safety of gear shifting control.

To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:

the first aspect of the invention provides a gear effectiveness judging method of a knob type gear shifter.

The knob type gear shifter is provided with a plurality of knob positions, including a zero position arranged in the center, a first light rotation position and a second light rotation position which are symmetrically arranged along the zero position, and a first heavy rotation position and a second heavy rotation position; the gear effectiveness judging method of the knob type gear shifter comprises the following steps:

identifying the effective position information of a knob of the knob type shifter;

acquiring the current vehicle gear state, the current vehicle speed and brake signal validity state information;

if the current vehicle gear state is the D gear, setting the effective gear as the R gear only when the current vehicle speed is smaller than the set value and the effective position information of the knob is the first re-rotation position, otherwise setting the effective gear as the N gear;

if the current vehicle gear state is R gear, setting the effective gear as D gear only when the current vehicle speed is smaller than the set value and the effective position information of the knob is the second re-rotation position, otherwise setting the effective gear as N gear;

if the current vehicle gear state is N gear, setting the effective gear as R gear only when the effective position information of the knob is the first re-rotation position and the brake signal is effective; setting an effective gear as a D gear when the effective position information of the knob is a second re-rotation position and the brake signal is effective; otherwise, the effective gear is still set as N gear.

A second aspect of the present invention provides a knob type shifter gear position validity determination system.

A determination system of the knob shifter gear effectiveness determination method according to the first aspect, comprising:

an identification module configured to: identifying the effective position information of a knob of the knob type shifter;

an acquisition module configured to: acquiring the current vehicle gear state, the current vehicle speed and brake signal validity state information;

a judgment module configured to: if the current vehicle gear state is the D gear, setting the effective gear as the R gear only when the current vehicle speed is smaller than the set value and the effective position information of the knob is the first re-rotation position, otherwise setting the effective gear as the N gear;

The one or more of the above technical solutions have the following beneficial effects:

the invention provides a method and a system for judging the gear effectiveness of a knob type gear shifter, which can identify gear position information and retention time, identify the effective position of the gear, judge the gear effectiveness according to the effective position of the gear and the state of a vehicle, and improve the overall safety of gear shifting control.

According to the invention, whether the gear of the knob type gear shifter is effective or not is considered, the gear effectiveness judgment condition of the knob type gear shifter is set, meanwhile, in the process of judging the gear effectiveness, the current vehicle speed and the brake signal effectiveness state information are considered at the same time, and the information is taken as the condition for judging the gear effectiveness, so that the safety of vehicle control is improved as a whole.

According to the invention, whether the gear is stuck or not can be judged, and the judgment is carried out according to the situation that the gear is stuck due to frequent use of the gear shifting mechanism in the use process of the knob type gear shifter, so that the effectiveness of gear identification in the gear shifting process is further improved.

Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

Fig. 1 is a schematic top view showing the whole structure of a knob type shifter according to a first embodiment.

Fig. 2 is a schematic view of a first embodiment knob type shifter knob position setting.

Fig. 3 is a schematic diagram of the interaction of the data flow in the first embodiment.

In the drawings, the list of components represented by the various numbers is as follows:

1 zero position, 2 first gentle spin position, 3 second gentle spin position, 4 first heavy spin position, 5, second heavy spin position, 6 knob type selector.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention.

Embodiments of the invention and features of the embodiments may be combined with each other without conflict.

Paraphrasing:

EGS: a shift controller;

VCU: a vehicle controller;

ICU: and an instrument controller.

The invention is characterized in that:

the invention provides a knob type gear shifter, which belongs to a monostable gear shifting mechanism and comprises R, N, D, P four gears and 5 gear shifting positions. The gear shifting panel has a backlight function, the gear shifting knob ascends and descends through motor control, the gear shifting controller EGS memorizes the zero position of the gear shifting mechanism, after the vehicle is electrified, the EGS sends a gear state to the VCU according to the angle of the gear shifting knob, the VCU judges the effective gear and the fault state according to the gear position, the gear shifting time, the vehicle state and the like, and meanwhile the VCU sends the effective gear and the fault state to the instrument for display.

Example 1

The embodiment discloses a gear effectiveness judging method of a knob type gear shifter.

As shown in fig. 1-2, the knob shifter 6 is provided with a plurality of knob positions, including a zero position 1 arranged in the center, a first light rotation position 2 and a second light rotation position 3 symmetrically arranged along the zero position, and a first heavy rotation position 4 and a second heavy rotation position 5; the first light rotation position is arranged closer to the zero position than the first heavy rotation position; the second light swivel position is disposed closer to the zero position than the second heavy swivel position.

In the present embodiment, the first and second light-turning positions and the first and second heavy-turning positions are set as follows: l1, R1, L2, R2 positions.

The gear effectiveness judging method of the knob type gear shifter comprises the following steps:

The embodiment firstly considers whether the gear of the knob type gear shifter is effective or not, limits the effectiveness of the gear of the knob type gear shifter, considers the influence of the current vehicle speed in the gear conversion process in the gear effectiveness judging process, considers the current vehicle speed and the brake signal effectiveness state information at the same time, and takes the current vehicle speed and the brake signal effectiveness state information as the condition for judging the gear effectiveness, thereby improving the safety of vehicle control on the whole.

Further, the method further comprises the following steps: if the current vehicle gear state is in the P gear:

the effective position information of the knob is a second light rotation position or a first light rotation position, at the moment, if a brake signal is invalid, an effective gear is set as a P gear, otherwise, the effective gear is set as an N gear;

the effective position information of the knob is a second re-rotation position, at the moment, if the braking signal is invalid, the effective gear is set as the P gear, otherwise, the effective gear is set as the D gear;

the effective position information of the knob is the first re-rotation position, at this time, if the braking signal is invalid, the effective gear is set as the P gear, otherwise, the effective gear is set as the R gear.

In this embodiment, when the gear validity determination is performed, the EGS performs gear validity position determination according to the gear position and the position stay duration, and the VCU performs D, R, N gear validity logic determination according to valid gear position information and the vehicle state sent by the EGS.

The above process is specifically described as follows:

(1) When the current gear is the N gear, if the gear position information received by the VCU is L1, the VCU sets the effective gear as the N gear;

(2) When the current gear is the N gear, if the gear position information received by the VCU is L2, and meanwhile, the VCU detects that the brake signal is effective, and the VCU sets the effective gear as the R gear;

(3) When the current gear is the N gear, if the gear position information received by the VCU is R1, the VCU sets the effective gear as the N gear;

(4) When the current gear is the N gear, if the gear position information received by the VCU is R2, and meanwhile, the VCU detects that the brake signal is effective, and the VCU sets the effective gear as the D gear;

(5) When the current gear is the D gear, if the gear position information received by the VCU is L1 and the current vehicle speed v is more than v1, the VCU sets the effective gear as the N gear;

(6) When the current gear is the D gear, if the gear position information received by the VCU is L2 and the current vehicle speed v is more than v1, the VCU sets the effective gear as the N gear;

(7) When the current gear is the D gear, if the gear position information received by the VCU is L1 and the current vehicle speed v is smaller than v1, the VCU sets the effective gear as the N gear;

(8) When the current gear is the D gear, if the gear position information received by the VCU is L2 and the current vehicle speed v is smaller than v1, the VCU sets the effective gear as the R gear;

(9) When the current gear is the R gear, if the gear position information received by the VCU is R1 and the current vehicle speed v is more than v1, the VCU sets the effective gear as the N gear;

(10) When the current gear is the R gear, if the gear position information received by the VCU is R2 and the current vehicle speed v is more than v1, the VCU sets the effective gear as the N gear;

(11) When the current gear is the R gear, if the gear position information received by the VCU is R1 and the current vehicle speed v is smaller than v1, the VCU sets the effective gear as the N gear;

(12) When the current gear is the R gear, if the gear position information received by the VCU is R2 and the current vehicle speed v is smaller than v1, the VCU sets the effective gear as the D gear;

(13) If the current gear is in the P gear, the gear information received by the VCU is R1, and if the VCU detects that the brake signal is invalid, the VCU sets an effective gear as the P gear, otherwise, the effective gear is set as the N gear;

(14) If the current gear is in the P gear, the gear information received by the VCU is R2, and if the VCU detects that the brake signal is invalid, the VCU sets an effective gear as the P gear, otherwise, the effective gear is set as the D gear;

(15) If the current gear is in the P gear, the gear information received by the VCU is L1, at the moment, if the VCU detects that the brake signal is invalid, the VCU sets the effective gear as the P gear, otherwise, the effective gear is set as the N gear;

(16) If the current gear is in the P gear, the gear information received by the VCU is L2, if the VCU detects that the brake signal is invalid, the VCU sets the effective gear as the P gear, otherwise, the effective gear is set as the R gear.

Further, the method for identifying the effective position information of the knob type gear shifter by collecting the position information of the gear knob of the knob type gear shifter and the position stay duration time specifically comprises the following steps:

if the gear knob is positioned at the first light rotation position and the position stay duration time is less than or equal to t1, the identified effective position information of the knob is the first light rotation position;

if the gear knob position is at the first re-rotation position and the position stay duration t is less than or equal to t2, the identified effective position information of the knob is the first re-rotation position;

if the gear knob position is at the second light-turning position and the position stay duration t is less than or equal to t1, the identified effective position information of the knob is the second light-turning position;

if the gear knob position is at the second re-rotation position and the position stay duration t is less than or equal to t2, the identified effective position information of the knob is the second re-rotation position;

wherein t2 is greater than t1, and t2 and t1 are both preset times.

In this embodiment:

(1) The position of the gear knob is L1, the position stay duration time t is less than or equal to t1, and the EGS sends effective position information L1 to the VCU;

(2) The position of the gear knob is L2, the position stay duration time t is less than or equal to t2, t2 is more than t1, and the EGS sends effective position information L1 to the VCU;

(3) The position of the gear knob is R1, the position stay duration time t is less than or equal to t1, and the EGS sends effective position information R1 to the VCU;

(4) The position of the gear knob is R2, the position stay duration time t is less than or equal to t2, t2 is more than t1, and the EGS sends effective position information R2 to the VCU;

(5) In order to ensure gear shifting safety and prevent misoperation, t should not be less than 500ms, namely 0.5s < t1 < t2.

Further, the method further comprises the following steps: the gear knob position of the knob type gear shifter is identified, and the method specifically comprises the following steps:

reading a calibrated zero position as a reference position when the vehicle is electrified every time;

defining a clockwise rotation direction as an inverse direction and a counterclockwise rotation direction as a positive direction by taking a reference position as a starting point, and pre-storing an alpha 1 rotation angle and an alpha 2 rotation angle, wherein alpha 2 is larger than alpha 1;

acquiring gear knob rotation angle information alpha of a knob type gear shifter:

when alpha is judged to rotate in the positive direction, alpha is more than alpha 1 and alpha is less than alpha 2, the gear knob position is a first light rotation position;

judging that the gear knob position is a second light rotation position when alpha rotates in the reverse direction and alpha is more than alpha 1 and alpha is less than alpha 2;

when alpha is judged to rotate in the positive direction and alpha is more than alpha 2, the gear knob position is a first re-rotation position;

and when the alpha is judged to rotate in the reverse direction and the alpha is more than alpha 2, the gear knob position is the second re-rotation position.

In the present embodiment, a clockwise rotation direction is defined as an inverse direction, and a counterclockwise rotation direction is defined as a forward direction; in other embodiments, the clockwise rotation direction may be defined as the positive direction and the counterclockwise rotation direction may be defined as the negative direction, and the positions of L1, L2 and R1, R2 may be symmetrically arranged with respect to the positions in the present embodiment.

In this embodiment:

the EGS marks the middle position of the gear shifting mechanism as a zero position, and reads the marked zero position as a reference position when the vehicle is electrified every time;

the EGS identifies the position of a gear shifting knob through an internal angle sensor, and when the left turn is larger than an angle alpha 1, the EGS sends a left-handed position state to the VCU;

when the left rotation angle is larger than alpha 2, the EGS sends a left-hand heavy rotation position state to the VCU;

when the right rotation angle is greater than α1, the EGS sends a right-hand position status to the VCU, and when the right rotation angle is greater than α2, the EGS sends a right-hand position status to the VCU.

The value of α1 is 22.5 °, and the value of α2 is 35 °.

Further, the method further comprises the step of judging whether the gear fails according to the position information of the gear knob and the position stay duration time:

when the gear knob position is a first light rotation position or a second light rotation position or a first heavy rotation position or a second heavy rotation position or a non-induction position, and the position stay duration t1 is less than or equal to t 2:

acquiring position information of a gear knob at the last moment:

if the previous moment is the first light rotation position, determining that the first light rotation position is stuck, and simultaneously flashing the N\R indicator lamp;

if the previous moment is the first re-rotation position, determining that the first re-rotation position is stuck, and flashing an R-gear indicator lamp;

if the previous moment is the second light rotation position, judging that the second light rotation position is stuck, and simultaneously flashing the N/D indicator lamp;

if the previous moment is the second re-rotation position, judging that the second re-rotation position is stuck, and flashing a D-gear indicator lamp;

if the non-sensing position is stuck, the D/N/R indicator lamp flashes at the same time;

when the gear knob position is the first light rotation position or the second light rotation position or the first heavy rotation position or the second heavy rotation position or the non-induction position, and the position stay duration t is more than or equal to t2, the N gear clamping stagnation is judged, and the D/N/R indicator lamp flashes at the same time.

Further comprises:

when the gear knob is at the P gear position and the position stay duration t is more than or equal to t3, the gear knob is judged to be in the P gear clamping stagnation state, and the P gear indicator lamp flashes, wherein t1 is more than or equal to t3 and less than or equal to t2.

Further comprises:

when the vehicle is electrified, the knob type gear shifter does not ascend or stops in the ascending process, and the position stay duration t is more than or equal to t4, the motor clamping state and the ascending fault are judged, and the D/N/R indicator lamps flash at the same time;

when the vehicle is powered down, the knob type gear shifter does not descend or stops in the descending process, and the position stay duration t is more than or equal to t4, the motor clamping state and descending fault are judged, and the D/N/R indicator lamp flashes at the same time.

Further comprises:

when the motor is in a lifting fault, the control knob type gear shifter descends, ascends again after descending to a proper position, and if the three ascending steps still cannot reach a normal position, the motor clamping stagnation fault is judged;

when the motor fails to descend, the control knob type gear shifter ascends, descends again after ascending to the proper position, and if the motor fails to descend for three times and still cannot reach the normal position, the motor jamming failure is judged.

More specifically:

the EGS judges whether the gear fails according to the position state information and the position stay duration time of the gear, meanwhile, the singlechip stores the failure information, and the shift position stay duration time t described below meets the time requirement that t4 is less than or equal to t1 is less than or equal to t3 is less than or equal to t 2:

(1) When the position state is L1 or L2 or R1 or R2 or a non-induction position, the position stay duration t1 is less than or equal to t2, the EGS judges that the state is a clamping stagnation state, meanwhile, the EGS sends a last position signal, if the L1 state is clamped, the N/R indicator lamp is flashed at the same time, if the L2 state is clamped, the R-gear indicator lamp is flashed, if the R1 state is clamped, the N/D indicator lamp is flashed at the same time, if the R2 state is clamped, the D-gear indicator lamp is flashed, and if the non-induction position is clamped, the D/N/R indicator lamp is flashed at the same time;

(2) When the position state is L1 or L2 or R1 or R2 and the position stay duration time t is more than or equal to t2, the EGS judges that the state is a clamping stagnation state, and meanwhile, the EGS sends an N-gear signal to the VCU, and the D/N/R indicator lamps flash at the same time;

(3) When the position state is the P-gear position and the position stay duration time t is more than or equal to t3, the EGS judges that the state is the P-gear clamping stagnation state, and meanwhile, the EGS sends P-gear fault information to the VCU, and a P-gear indicator lamp flashes;

(4) The vehicle is electrified, if the gear shifting knob does not rise, the position stay duration time t is more than or equal to t4, the EGS judges that the state is a motor clamping state, meanwhile, the EGS sends motor clamping fault to the VCU, and the D/N/R indicator lamps flash at the same time;

(5) If the knob is stopped in the rising process and the position stay duration time t is more than or equal to t4, the EGS judges that the state is a motor clamping state, and meanwhile, the EGS sends a motor clamping fault to the VCU, and the D/N/R indicator lamps flash at the same time;

(6) The vehicle is powered down, the gear shifting knob is not lowered, the position stay duration time t is more than or equal to t4, the EGS judges that the state is a motor clamping state, meanwhile, the EGS sends motor clamping fault to the VCU, and the D/N/R indicator lamps flash at the same time;

(7) If the knob is stopped in the descending process and the position stay duration time t is more than or equal to t4, the EGS judges that the state is a motor clamping state, and meanwhile, the EGS sends a motor clamping fault to the VCU, and the D/N/R indicator lamps flash at the same time;

(8) After detecting the ascending fault, the EGS singlechip carries out descending operation, ascends again after the ascending fault is in place, and if the ascending fault can not reach the normal position yet after the ascending for three times, the EGS sends the motor clamping fault to the VCU;

(9) After detecting the descending fault, the EGS singlechip carries out ascending operation, descends again after the ascending operation is in place, and if the descending operation can not reach the normal position yet after the descending operation is carried out for three times, the EGS sends the motor clamping fault to the VCU;

(10) If the gear shifting motor is in ascending or descending fault, three recovery actions are carried out, normal work still cannot be carried out, and the singlechip is not carrying out lifting operation so as to prevent the motor from overheating.

In this embodiment, the VCU sends the gear information and the fault state to the ICM, and the ICM displays:

if the VCU receives the clamping stagnation fault of the lifting motor sent by the EGS, the VCU sends a gear shifting mechanism fault to the ICU.

Example two

The embodiment discloses a judging system of a gear effectiveness judging method of a knob type gear shifter.

A determination system according to the knob shifter gear position validity determination method of embodiment one, comprising:

It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented by general-purpose computer means, alternatively they may be implemented by program code executable by computing means, whereby they may be stored in storage means for execution by computing means, or they may be made into individual integrated circuit modules separately, or a plurality of modules or steps in them may be made into a single integrated circuit module. The present invention is not limited to any specific combination of hardware and software.

While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.

Claims

1. The method is characterized in that the knob type gear shifter is provided with a plurality of knob positions, including a zero position arranged in the center, a first light rotation position, a second light rotation position, a first heavy rotation position and a second heavy rotation position which are symmetrically arranged along the zero position; the gear effectiveness judging method of the knob type gear shifter comprises the following steps:

2. The method of determining gear validity of a rotary knob type shifter according to claim 1, wherein the first light-rotation position is disposed closer to a zero position than the first heavy-rotation position; the second light swivel position is disposed closer to the zero position than the second heavy swivel position.

3. The method of determining gear availability of a rotary knob shifter according to claim 1, further comprising, if the current vehicle gear state is in P range:

4. The method for determining gear validity of a rotary knob type gear shifter according to claim 1, wherein the method for identifying the effective position information of the rotary knob type gear shifter by collecting the position information of the rotary knob type gear shifter and the position stay duration time specifically comprises the steps of:

wherein t2 is greater than t1, and t2 and t1 are both preset times.

5. The method for determining the gear effectiveness of a rotary knob type gear shifter according to claim 4, further comprising identifying the gear knob position of the rotary knob type gear shifter, specifically:

6. The method of determining gear validity of a rotary knob shifter according to claim 5, further comprising determining whether a gear has failed based on gear knob position information and position dwell time:

acquiring position information of a gear knob at the last moment:

7. The method for determining gear availability of a rotary knob shifter according to claim 6, further comprising:

8. The method for determining gear availability of a rotary knob shifter according to claim 1, further comprising:

when the vehicle is electrified, the knob type gear shifter does not ascend or stops in the ascending process, and the position stay duration time t is more than or equal to t4, the motor clamping state and the ascending fault are determined, and the D/N/R indicator lamp simultaneously flashes

9. The method for determining gear availability of a rotary knob shifter according to claim 8, further comprising:

10. A determination system of the gear position validity determination method of a knob type gear shifter according to any one of claims 1 to 9, characterized in that: comprising the following steps: