CN115571087A

CN115571087A - Power supply gear control method and device, keyless entry system and vehicle

Info

Publication number: CN115571087A
Application number: CN202211384490.0A
Authority: CN
Inventors: 黄得龙; 闫鑫洋; 倪志佳
Original assignee: Shanghai Nan'en Automobile Technology Co ltd
Current assignee: Shanghai Nan'en Automobile Technology Co ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-01-06

Abstract

The disclosure relates to a power supply gear control method and device, a keyless entry system and a vehicle. The power supply gear control method comprises the following steps: generating a first control signal corresponding to a target gear, and transmitting the first control signal along a first transmission path; under the condition that a first preset condition is met, generating a second control signal corresponding to the target gear, and transmitting the second control signal along a second transmission path, wherein the second transmission path is different from the first transmission path; generating a third control signal to drive to the target gear if the first control signal and the second control signal satisfy a second preset condition.

Description

Power supply gear control method and device, keyless entry system and vehicle

Technical Field

The disclosure relates to the technical field of electronics, in particular to a power supply gear control method and device, a keyless entry system and a vehicle.

Background

In current keyless entry systems (PEPS) of vehicles, a power range control device (PDU) may be integrated to switch to a different power range according to a user's instruction or operation. However, in some cases, unwanted power source gear shifts may occur due to various interference factors, creating a safety hazard.

Disclosure of Invention

One of the objectives of the present disclosure is to provide a power shift control method and apparatus, a keyless entry system and a vehicle, so as to improve reliability and safety of power shift switching.

According to a first aspect of the present disclosure, there is provided a power supply shift position control method including:

generating a first control signal corresponding to a target gear, and transmitting the first control signal along a first transmission path;

under the condition that a first preset condition is met, generating a second control signal corresponding to the target gear, and transmitting the second control signal along a second transmission path, wherein the second transmission path is different from the first transmission path;

generating a third control signal to drive to the target gear if the first control signal and the second control signal satisfy a second preset condition.

In some embodiments, the power range control method further comprises:

in the event that the first preset condition is not met, maintaining a current control signal in the first transmission path and/or continuing to attempt to generate and transmit the first control signal.

In some embodiments, the power range control method further comprises:

generating a first feedback signal configured to indicate whether the first control signal was successfully transmitted.

In some embodiments, the first predetermined condition is determined to be met when the first feedback signal indicates that the first control signal transmission is successful, and the first predetermined condition is otherwise determined not to be met.

In some embodiments, the power range control method further comprises:

when the first feedback signal indicates that the first control signal fails to be transmitted and the third control signal fails to be generated, first error information is generated and recorded.

In some embodiments, the power range control method further comprises:

generating a second feedback signal configured to indicate whether the third control signal was successfully generated.

In some embodiments, the power range control method further comprises:

in the event that the second feedback signal indicates that the third control signal was not successfully generated, generating and recording a second error message, and/or continuing to attempt to generate and transmit at least one of the first control signal and the second control signal.

In some embodiments, generating a third control signal to drive to the target gear in the event that the first and second control signals satisfy a second preset condition comprises:

when the target gear is a power-up gear, generating the third control signal if at least one of the first control signal and the second control signal is successfully transmitted; and/or

When the target gear is a power-down gear, the third control signal is generated if both the first control signal and the second control signal are successfully transmitted.

According to a second aspect of the present disclosure, there is provided a power supply shift position control device comprising:

a master unit configured to:

generating and transmitting a first control signal corresponding to a target gear, an

Under the condition that a first preset condition is met, generating and transmitting a second control signal corresponding to the target gear;

a radio frequency chip communicatively connected with the master control unit;

a latch unit communicatively connected with the radio frequency chip;

a logic unit communicatively connected with the master unit and the latch unit, and configured to:

receiving the first control signal transmitted from the main control unit via the radio frequency chip and the latch unit,

receiving a second control signal from the master control unit,

performing a preset logical operation corresponding to the target gear on the first control signal and the second control signal to determine whether the first control signal and the second control signal satisfy a second preset condition, and

generating and transmitting a third control signal in case that the first control signal and the second control signal satisfy the second preset condition; and

a hardware drive unit communicatively coupled with the logic unit and configured to receive the third control signal to drive to the target gear.

In some embodiments, the latch unit is further configured to maintain the current control signal if the first preset condition is not satisfied.

In some embodiments, the master control unit is further configured to continue attempting to generate and transmit the first control signal if the first preset condition is not satisfied.

In some embodiments, the latch unit is further configured to generate a first feedback signal and transmit the first feedback signal to the master unit, wherein the first feedback signal is configured to indicate whether the first control signal was successfully transmitted from the latch unit to the logic unit.

In some embodiments, the first predetermined condition is determined to be satisfied when the first control signal is successfully transmitted from the latch unit to the logic unit, and the first predetermined condition is determined not to be satisfied otherwise.

In some embodiments, the master unit is further configured to generate and record a first error message when the first feedback signal indicates that the first control signal failed to be successfully transmitted from the latch unit to the logic unit and the third control signal fails to be generated.

In some embodiments, the logic unit is further configured to generate a second feedback signal and transmit the second feedback signal to the master control unit, wherein the second feedback signal is configured to indicate whether the third control signal was successfully generated.

In some embodiments, the master control unit is further configured to generate and record a second error message and/or continue to attempt to generate and transmit at least one of the first control signal and the second control signal if the second feedback signal indicates that the third control signal was not successfully generated.

In some embodiments, the logic is configured to:

when the target gear is a power-on gear, determining whether at least one of the first control signal and the second control signal is received, if so, generating a third control signal and transmitting the third control signal to the hardware driving unit, and/or transmitting the third control signal to the hardware driving unit

And when the target gear is a power-off gear, determining whether the first control signal and the second control signal are received, and if so, generating a third control signal and transmitting the third control signal to the hardware driving unit.

In some embodiments, the latch unit comprises a static random access memory.

According to a third aspect of the present disclosure, there is provided a keyless entry system comprising a power source gear position control arrangement as described above.

According to a fourth aspect of the present disclosure, there is provided a vehicle comprising a power source gear control device as described above or a keyless entry system as described above.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic flow diagram of a power supply gear control method according to an exemplary embodiment of the present disclosure;

FIG. 2 illustrates a schematic structural diagram of a power source gear control device according to an exemplary embodiment of the present disclosure;

fig. 3 shows a timing diagram of various signals in a specific example according to the present disclosure.

Note that in the embodiments described below, the same reference numerals are used in common between different drawings to denote the same portions or portions having the same functions, and a repetitive description thereof will be omitted. In this specification, like reference numerals and letters are used to designate like items, and therefore, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

For convenience of understanding, the positions, sizes, ranges, and the like of the respective structures shown in the drawings and the like do not sometimes indicate actual positions, sizes, ranges, and the like. Therefore, the disclosed invention is not limited to the positions, dimensions, ranges, etc., disclosed in the drawings and the like. Furthermore, the figures are not necessarily to scale, some features may be exaggerated to show details of particular components.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. That is, the in situ imaging apparatus and the bioreaction device herein are shown by way of example to illustrate different embodiments in the present disclosure and are not intended to be limiting. Those skilled in the art will appreciate that they are merely illustrative of ways that the invention may be practiced, not exhaustive.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In a vehicle, a power range control device (PDU) may be integrated into a keyless entry system (PEPS) to switch to different power ranges (e.g., ranges including OFF, ACC, ON, crack, RUN, etc.) according to a user's instruction or operation, and simultaneously engage corresponding relays (e.g., relays including ACC, IGN, START, etc.) to supply power to corresponding Electronic Control Units (ECUs).

However, in some cases, the power source gear may be accidentally switched due to various interference factors, which may cause a safety hazard. For example, in the case of a power supply gear in a power-on gear, if the battery voltage of the entire vehicle suddenly drops for example for several tens of milliseconds due to a starter or contact bounce, the power supply gear of the vehicle may suddenly be switched down to a power-off gear, and all relays will be turned off at this time. Even if the power supply of the vehicle can be recovered in a short time, the electronic control unit connected to the power-on gear relay cannot normally operate because it is already in the power-off gear at this time. The falling of the power supply gear of the automobile caused by the power supply jitter can cause certain potential safety hazards, for example, if the automobile suddenly stops working at high speed at night, the headlight is turned off, and the automobile is very dangerous.

In addition, in some cases, if a Main Control Unit (MCU) of the vehicle fails, the power supply gear cannot be normally controlled, for example, the power supply gear is suddenly switched to a power-off gear, which may cause a certain potential safety hazard.

In order to solve the above problems, the present disclosure provides a power supply shift control method, which controls switching of power supply shifts jointly through two control signals transmitted along different transmission paths, so as to improve reliability and safety of a vehicle. Hereinafter, the technical solution of the present disclosure will be specifically described by taking the above switching between the electrical gear and the power-down gear as an example, however, it is understood that the technical solution of the present disclosure can also be used for switching between other power source gears according to actual requirements, and is not limited herein.

In an exemplary embodiment of the present disclosure, as shown in fig. 1, the power supply gear control method may include:

in step S110, a first control signal corresponding to the target gear is generated and transmitted along a first transmission path.

The target gear can be determined according to an instruction or operation given by a user, and an action expected to be executed by the user can be realized after the power supply gear is switched to the target gear. The target gears may include OFF, ACC, ON, CRANK, and RUN gears as described above, however, it is understood that in other embodiments, the target gears may be different from these listed gears, and are not limited herein. The first control signal corresponds to a target gear, i.e. the first control signal may be used to indicate the gear to be shifted.

The first transmission path may include one or more circuit components. For example, in a specific power gear control apparatus as shown in fig. 2, the first transmission path may include a main control unit 210, a Radio Frequency (RF) chip 220, a latch unit 230, and a logic unit 240, and the first control signal may be generated by the main control unit 210 and transmitted to the logic unit 240 through the RF chip 220 and the latch unit 230. However, it is understood that in some other specific examples, the first transmission path may include other one or more circuit components, and is not limited herein.

Returning to fig. 1, the power supply gear control method may further include:

and step S120, generating a second control signal corresponding to the target gear under the condition that the first preset condition is met, and transmitting the second control signal along a second transmission path.

The second transmission path is different from the first transmission path, so that the wrong switching of the power supply gear caused by the fault of one transmission path is avoided. For example, in a specific power gear control apparatus as shown in fig. 2, the second transmission path may include the main control unit 210 and the logic unit 240, and the second control signal may be generated by the main control unit 210 and directly transmitted to the logic unit 240. However, it is understood that in some other specific examples, the second transmission path may include other one or more circuit components, and is not limited herein.

In different embodiments, the corresponding first preset condition may be set according to specific requirements. In a specific example, the first preset condition may be set as follows: if the target gear has been acquired, it may be determined that the first preset condition is satisfied, otherwise it is determined that the first preset condition is not satisfied. At this time, the first control signal and the second control signal may be simultaneously or substantially simultaneously generated according to the target gear and transmitted along different first and second transmission paths, respectively.

In another specific example, the corresponding first preset condition may also be set according to the generation and/or transmission state of the first control signal, and the like, and the second control signal corresponding to the target gear may also be generated and transmitted if the first preset condition is satisfied. At this time, the second control signal and the first control signal are not generally generated at the same time.

In some embodiments, to monitor the transmission state of the first control signal, the power range control method may further include: a first feedback signal configured to indicate whether the first control signal was successfully transmitted is generated. For example, whether the first control signal is successfully transmitted may be indicated by a level of the first feedback signal, indicating that the first control signal is successfully transmitted if the first feedback signal is high, and indicating that the first control signal is not successfully transmitted if the first feedback signal is low.

Accordingly, in a specific example, the first predetermined condition may be determined to be satisfied if the first feedback signal indicates that the first control signal transmission is successful, and otherwise the first predetermined condition is determined not to be satisfied. Thus, based on the first feedback signal, it can be determined whether to continue generating and transmitting the second control signal. For example, the second control signal is generated and transmitted along a second transmission path different from the first transmission path only if the first control signal is successfully transmitted.

Furthermore, in some embodiments, the power range control method may further include: and maintaining the current control signal in the first transmission path under the condition that the first preset condition is not met. Specifically, if the first preset condition is not satisfied, for example, the first control signal is not successfully transmitted, it may be that the circuit component for generating the first control signal has failed or that other circuit components or cables in the first transmission path have failed. In this case, in order to maintain the normal operation of the vehicle, to avoid a false power shift, in particular to avoid a false power shift to a power-down gear, which may cause a safety hazard, the current control signal in the first transmission path, i.e. the one immediately preceding the first control signal generated this time, may be continuously maintained to maintain the current power shift of the vehicle, e.g. to maintain the power shift of the vehicle in a power-up gear.

Furthermore, considering that in some cases the failure to meet the first predetermined condition (e.g., the failure to successfully transmit the first control signal) is caused by some accidental disturbance or fault, it is also possible to continue to attempt to generate and transmit the first control signal in an attempt to eliminate the effect of such accidental disturbance or fault and return the vehicle to a normal state as soon as possible.

Returning to fig. 1, in an exemplary embodiment of the present disclosure, the power range control method may further include:

and step S130, generating a third control signal to drive to the target gear under the condition that the first control signal and the second control signal meet a second preset condition.

Specifically, whether to drive to the target gear is determined jointly according to the first control signal and the second control signal, and the corresponding third control signal can be generated to drive to the target gear only when the first control signal and the second control signal meet the second preset condition. Therefore, the wrong gear switching caused by the wrong first control signal or second control signal can be avoided, and the reliability of gear control is improved. Since the first transmission path and the second transmission path can be relatively independent or at least partially independent of each other, the adverse effect of interference or failure on one of the transmission paths on the overall power range switching is avoided.

The second preset condition can be determined according to the property of the target gear, so that the final gear switching meets the requirements on safety and the like.

In some embodiments, in the case where the first control signal and the second control signal satisfy the second preset condition, generating the third control signal to drive to the target gear may include: and when the target gear is the power-on gear, generating a third control signal under the condition that at least one of the first control signal and the second control signal is successfully transmitted.

That is, if the target gear to be shifted is the power-on gear, the shift of the gear can be performed as long as at least one of the first control signal and the second control signal is successfully transmitted. In this way, even if one of the first transmission path and the second transmission path fails, switching to the power-on gear is not affected. In addition, in combination with the above-mentioned situation that the transmission of the first control signal fails, the current control signal in the first transmission path may be maintained, and if the current control signal is a control signal corresponding to the power-on gear, the vehicle may be continuously maintained in the power-on gear, so as to avoid a sudden power supply drop caused by a circuit failure, thereby helping to ensure the safe operation of the vehicle.

Further, in some embodiments, in the case where the first control signal and the second control signal satisfy the second preset condition, generating the third control signal to drive to the target gear may include: when the target gear is a power-down gear, a third control signal is generated in the case where both the first control signal and the second control signal are successfully transmitted.

Considering that the vehicle cannot normally operate in the power-down range, if the target range to be shifted is the power-down range, multiple confirmations or safeguards are required for such shift range shifting for safety reasons. Therefore, in the present embodiment, only when both the first control signal and the second control signal corresponding to the power-down shift position are successfully transmitted, the third control signal is generated to drive to the power-down shift position, so that a power-down error caused by a failure of one of the transmission paths or one of the circuit components is avoided, and the safety of the vehicle is ensured.

In some embodiments, to monitor the generation state of the third control signal, the power range control method may further include: a second feedback signal configured to indicate whether the third control signal was successfully generated is generated.

In a specific example, whether the third control signal is successfully generated may be indicated by a property such as a level of the second feedback signal. For example, if the second feedback signal is in a high state, it indicates that the third control signal was successfully generated, otherwise, it indicates that the third control signal was not successfully generated. In another specific example, the second feedback signal may also indicate more detailed information, e.g. indicating a specific transmission status of the first control signal and/or the second control signal.

In addition, in some embodiments, corresponding error reporting information may be generated based on at least one of the first feedback signal and the second feedback signal, so as to help quickly find a fault point in subsequent processes of repair, maintenance and the like, improve maintenance efficiency, and reduce maintenance cost.

Specifically, in some embodiments, the power source gear control method may further include: when the first feedback signal indicates that the first control signal fails to be transmitted and the third control signal fails to be generated, first error information is generated and recorded. Here, the first error information may be used to indicate that a fault has occurred during generation or transmission of the first control signal.

In still other embodiments, the power range control method may further include: in the event that the second feedback signal indicates that the third control signal was not successfully generated, a second error message is generated and recorded. Here, the second error information may indicate that the fault occurs where the first control signal and the second control signal are logically operated or the like to determine whether the third control signal is generated.

Furthermore, in some embodiments, in the case that the second feedback signal indicates that the third control signal is not successfully generated, at least one of the first control signal and the second control signal may be attempted to be generated and transmitted continuously (for example, according to specific information given by the second feedback signal, pulling up the corresponding one or both of the first control signal and the second control signal) in order to eliminate the interference or the fault and enable the normal switching of the vehicle power range.

According to another aspect of the present disclosure, a power supply gear control device is also presented, in which the above-described power supply gear control method may be implemented. However, it is understood that in other embodiments, the power position control method may be implemented in other devices, and is not limited herein.

In an exemplary embodiment of the present disclosure, as shown in fig. 2, the power supply gear control device may include a main control unit 210, a radio frequency unit 220, a latch unit 230, a logic unit 240, and a hardware driving unit 250.

Among other things, the main control unit 210 may be configured to generate and transmit a first control signal corresponding to a target gear.

Specifically, the target gear may be determined according to an instruction or operation given by the user, and by switching the power supply gear to the target gear, an action that the user desires to perform may be implemented. Target gear may include OFF, ACC, ON, CRANK, and RUN gears as described above, or may include one or more other gears. The first control signal corresponds to the target gear, i.e. the first control signal may be used to indicate the gear to be shifted.

In addition, the main control unit 210 may be further configured to generate and transmit a second control signal corresponding to the target gear, if the first preset condition is satisfied.

In different embodiments, the corresponding first preset condition may be set according to specific requirements. In a specific example, the first preset condition may be set as follows: and if the target gear is acquired, determining that the first preset condition is met, otherwise, determining that the first preset condition is not met. At this time, the first control signal and the second control signal may be simultaneously or substantially simultaneously generated according to the target gear.

In another specific example, it is also possible to set a corresponding first preset condition according to the generation and/or transmission state of the first control signal, etc., and to generate and transmit a second control signal corresponding to the target gear if the first preset condition is satisfied. At this time, the second control signal and the first control signal are not generally generated at the same time.

The rf chip 220 may be communicatively connected with the main control unit 210. Here, the radio frequency chip 220 may be a chip in the PEPS of the vehicle, and may be used to transmit an RF signal to perform an action to be performed by the PEPS, in addition to participating in the transmission of the first control signal and the like described herein.

The latch unit 230 may be communicatively connected with the rf chip 220. In some embodiments, the latch unit 230 may include a static random access memory to implement latching of signals.

The logic unit 240 may be communicatively connected with the latch unit 230. The logic unit 240 may include a logic gate such as an or gate, and gate, etc., which may perform a corresponding logic operation on the received control signal to output a new control signal after the operation.

As shown in fig. 2, the first control signal generated by the main control unit 210 may be transmitted to the logic unit 240 through the rf chip 220 and the latch unit 230 in sequence for further processing. In some embodiments, the main control unit 210 and the rf chip 220 may communicate with each other through an SPI command, and the rf chip 220 transmits the first control signal IGNA to the latch unit 230 under the action of the SPI command from the main control unit 210, and then the latch unit 230 transmits the first control signal IGNA to the logic unit 240.

In some embodiments, in order to monitor the transmission state of the first control signal IGNA, as shown in fig. 2, the latch unit 230 may be further configured to generate a first feedback signal SF1 and transmit the first feedback signal SF1 to the main control unit 210. Wherein the first feedback signal SF1 may be configured to indicate whether the first control signal IGNA is successfully transmitted from the master control unit 210 to the logic unit 240. For example, whether the first control signal is successfully transmitted may be indicated by the level of the first feedback signal SF1, and if the first feedback signal SF1 is at a high level, it indicates that the transmission is successful, otherwise, it indicates that the transmission is failed.

Accordingly, in some embodiments, when the first feedback signal SF1 indicates that the first control signal IGNA is successfully transmitted from the main control unit 210 to the logic unit 240, it may be determined that the first preset condition is satisfied, and at this time, the main control unit 210 may continue to generate and transmit the second control signal IGNB.

Otherwise, that is, when the first preset condition is not satisfied, the main control unit 210 may not generate and transmit the second control signal IGNB. In this case, as described above, since the latch unit 230 is provided and the latch unit 230 may be a radio frequency chip sram, in the case that the radio frequency chip is powered, the logic value of the signal therein may be latched and may be read by means of, for example, SPI, so that the first control signal IGNA may be guaranteed to have a sufficiently long electric signal holding time when the power supply falls or the MCU is reset, and therefore, the latch unit 230 may be configured to maintain the current control signal if the first preset condition is not satisfied.

Specifically, if the first preset condition is not satisfied, for example, the first control signal is not successfully transmitted, it may be that the main control unit 210 has failed, or that other circuit components or cables in the transmission path of the first control signal have failed, in this case, in order to maintain the normal operation of the vehicle, avoid an erroneous power shift, in particular, avoid an erroneous shift to a power-down shift to cause a safety hazard, the current control signal, i.e., the control signal immediately before the first control signal generated this time, may be continuously maintained through the latch unit 230 to maintain the current power shift of the vehicle, for example, to maintain the power shift at the power-up shift. With this design, the master control unit 210 cannot send a corresponding SPI command to communicate when it fails, and thus cannot complete the switch to the power-off gear. Moreover, if the radio frequency chip 220 fails, the power-off gear cannot be switched independently, so that the risk of falling of the power supply gear caused by hardware failure is prevented to a certain extent.

Furthermore, considering that in some cases, the failure to satisfy the first preset condition (failure to successfully transmit the first control signal) is due to some accidental interference or failure, in some embodiments, the main control unit 210 may be further configured to continue to attempt to generate and transmit the first control signal IGNA in the case that the first preset condition is not satisfied, in order to eliminate the effect of such accidental interference or failure and to return the vehicle to the normal state as soon as possible.

In addition, as shown in fig. 2, the logic unit 240 may also be communicatively connected with the master control unit 210 through a different transmission path. For example, the logic unit 240 may be directly connected to the main control unit 210 without passing through the transmission path where the rf chip 220 and the latch unit 230 are located. Thus, if the master control unit 210 generates the second control signal IGNB, the second control signal IGNB may be directly transmitted to the logic unit 240 for further processing.

As shown in fig. 2, the logic unit 240 may be configured to perform a preset logic operation corresponding to the target gear with respect to the first and second control signals IGNA and IGNB to determine whether the first and second control signals IGNA and IGNB satisfy a second preset condition, and to generate and transmit the third control signal IGNC in case that the first and second control signals IGNA and IGNB satisfy the second preset condition.

Specifically, the logic unit 240 may determine whether to drive to the target gear according to both the first control signal IGNA and the second control signal IGNB, and may generate the corresponding third control signal IGNC to drive to the target gear only if the first control signal IGNA and the second control signal IGNB satisfy a second preset condition. In this way, erroneous shift switching caused by a failure of the first control signal IGNA or the second control signal IGNB can be avoided, and the reliability of shift control can be improved. Since the first control signal IGNA and the second control signal IGNB are transmitted to the logic unit 240 via transmission paths that are relatively independent or at least partially independent of each other, respectively, the adverse effect of interference or failure on one of the transmission paths on the overall power range switching is avoided.

In some embodiments, when the target gear position is the power-up gear position, the logic unit 240 may determine whether at least one of the first control signal IGNA and the second control signal IGNB is received, and if so, generate and transmit the third control signal IGNC to the hardware driving unit 250 communicatively connected to the logic unit 240.

That is, if the target gear to be shifted is the power-on gear, the shift of the gear can be performed as long as at least one of the first control signal and the second control signal is successfully transmitted. In this way, even if one of the first transmission path and the second transmission path fails, switching to the power-on gear is not affected.

In a specific example, the logic unit 240 may include an or gate if each control signal is at a high level indicating a shift position and at a low level indicating no shift position. The first control signal IGNA and the second control signal IGNB are or-operated by an or gate, and the third control signal IGNC at a high level may be generated at an output of the or gate as long as at least one of the first control signal IGNA and the second control signal IGNB is at a high level, thereby achieving the switching to the power-on range. However, it is understood that in some other specific examples, other level states may be set to indicate that the gear shift needs to be switched, and the corresponding logic unit 240 is configured to perform the logic operation, which is not limited herein.

In some embodiments, when the target gear is the power-down gear, the logic unit 240 may determine whether both the first control signal IGNA and the second control signal IGNB are received, and if so, generate the third control signal IGNC and transmit the third control signal IGNC to the hardware driving unit 250.

Considering that the vehicle cannot normally run in the power-off range, if the target range to be shifted is the power-off range, multiple confirmations or safeguards are required for such shift range shifting for safety reasons. Therefore, in the present embodiment, only when both the first control signal and the second control signal corresponding to the power-down shift position are successfully transmitted, the third control signal is generated to drive to the power-down shift position, so that a power-down error caused by a failure of one of the transmission paths or one of the circuit components is avoided, and the safety of the vehicle is ensured.

In a specific example, the logic unit 240 may include an and gate if each control signal indicates that the shift range is switched when it is at a high level and does not switch when it is at a low level. The and operation is performed on the first control signal IGNA and the second control signal IGNB through the and gate, and the third control signal IGNC at a high level may be generated at the output terminal of the logic unit 240 only when both the first control signal IGNA and the second control signal IGNB are at a high level, so that the switching to the power-off gear is realized. Similarly, it is understood that in some other specific examples, other level states may be set to indicate that the gear shift needs to be switched, and the corresponding logic unit 240 is configured to perform the logic operation, which is not limited herein.

In some embodiments, as shown in fig. 2, the logic unit 240 may be further configured to generate a second feedback signal SF2 and transmit the second feedback signal SF2 to the master control unit 210. Wherein the second feedback signal SF2 may be configured to indicate whether the third control signal IGNC is successfully generated. In a specific example, whether the third control signal IGNC is successfully generated may be indicated by a property such as a level of the second feedback signal SF2, for example, when the second feedback signal SF2 is at a high level, it indicates that the third control signal IGNC is successfully generated, otherwise, it indicates that the third control signal IGNC is not successfully generated. In another specific example, the second feedback signal SF2 may also indicate more detailed information, for example indicating a specific transmission state of the first control signal IGNA and/or the second control signal IGNB.

As shown in fig. 2, the hardware driving unit 250 may receive the third control signal IGNC from the logic unit 240 and perform switching to a target gear according to the received third control signal IGNC. In some embodiments, the hardware drive unit 250 may include one or more relays or the like corresponding to various power source gears.

In some embodiments of the present disclosure, corresponding error reporting information may also be generated based on at least one of the first feedback signal SF1 and the second feedback signal SF2, so as to help quickly find a failure point in subsequent processes of repair, maintenance, and the like, improve maintenance efficiency, and reduce maintenance cost.

For example, the master control unit 210 may be configured to generate and record the first error information when the first feedback signal SF1 indicates that the first control signal IGNA is not successfully transmitted from the master control unit 210 to the logic unit 240, and the third control signal IGNC is not generated. Here, the first error information may be used to indicate that a fault has occurred during generation or transmission of the first control signal IGNA.

In addition, the main control unit 210 may be further configured to generate and record second error information in case that the second feedback signal SF2 indicates that the third control signal IGNC is not successfully generated. Here, the second error message may indicate that a failure occurred at the logic unit 240.

Furthermore, in some embodiments, the main control unit 210 may be further configured to continue to attempt to generate and transmit at least one of the first control signal IGNA and the second control signal IGNB (e.g., pull up a respective one or both of the first control signal IGNA and the second control signal IGNB according to specific information given by the second feedback signal SF 2) in case the second feedback signal SF2 indicates that the third control signal IGNC was not successfully generated, in order to eliminate the interference or the fault and enable the switching of the vehicle power supply range to be normal.

In the following, a power source gear switching process in two specific scenarios will be described by taking a target gear as an upper power-on gear and a lower power-off gear as an example. The control signal is at a high level to indicate that gear shifting is to be performed, and at a low level to not perform gear shifting, and the feedback signal is at a high level to indicate that generation or transmission of the signal is successful, and at a low level to indicate that generation or transmission of the signal is failed.

In one scenario, if the first feedback signal SF1 is at a high level when switching to the power-on range, the following process may be referred to. When switching to the power-up range, the main control unit 210 may first read the first feedback signal SF1 fed back by the latch unit 230 to determine whether the first control signal IGNA is successfully transmitted to the logic unit 240. If the first feedback signal SF1 indicates that the first control signal IGNA has been successfully transmitted to the logic unit 240 and the non-volatile power-on range variable is also at a high level, indicating that the current switch to the power-on range may be caused by a power supply drop, the main control unit 210 may transmit the first control signal IGNA to the radio frequency chip 220 and generate the second control signal IGNB to generate the third control signal IGNC at a high level, so as to drive the relay to switch to the power-on range. The nonvolatile power-on range variable is a variable generated by the main control unit 210 according to the first control signal IGNA and the second feedback signal SF2, and is recorded in the main control unit 210, and is maintained without being reinitialized when the main control unit 210 is restarted.

Fig. 3 shows a timing diagram of signals in a specific example. For example, the main control unit 210 may determine that the first feedback signal SF1 is true (e.g., the first feedback signal SF1 is in a high level state of 5V) when initializing for 8ms, pull up the second control signal IGNB (i.e., the second control signal IGNB is in a high level state), and pull up the third control signal IGNC after another 17ms, for example, during which the first control signal IGNA is always in a high level state.

In another case, if the main control unit 210 reads that the first feedback signal SF1 is in a low level state, it indicates that the power-on process is normal and no processing is required.

In yet another case, if the first feedback signal SF1 is in a high state but the non-volatile power-up range variable is in a low state, indicating that no power supply drop has occurred, the initialization should not perform a switch to power-up range.

In another scenario, when the power-down range needs to be switched, the main control unit 210 may first send an SPI command to control the rf chip 220 to generate and transmit the first control signal IGNA for switching to the power-down range, and the main control unit 210 may determine whether the first control signal IGNA is successfully transmitted to the logic unit 240 within a specified time according to the read first feedback signal SF 1. If the transmission is unsuccessful, the input and output of the latch unit 230 are disconnected, the switching to the power-off gear is terminated, and the latch unit 230 continues to maintain the previous control signal, and meanwhile, the main control unit 210 may generate and record first error information according to the first feedback signal SF1, where the first error information indicates that the driving rf chip fails to perform the power-off operation. If the transmission is successful, the main control unit 210 may continue to generate the second control signal IGNB and read the second feedback signal SF2 from the logic unit 240. If the second feedback signal SF2 indicates that the power-down gear is not successfully switched within the specified time, the main control unit 210 may pull up the first control signal IGNA and the second control signal IGNB again to maintain the external output state, and generate the second error notification information to indicate that the power-down gear fails due to the logic output fault.

According to yet another aspect of the present disclosure, there is also provided a keyless entry system, which may include the power source shift position control apparatus as described above.

According to still another aspect of the present disclosure, there is also provided a vehicle that may include the power supply range control apparatus or the keyless entry system as described above.

In the technical scheme, the radio frequency chip and the main control unit in the PEPS are used as two different control sources to jointly realize the switching control of the power supply gears, so that the IGN output of a whole vehicle power supply system can still be maintained when a vehicle power supply suddenly drops and is recovered in a short time or when the main control unit of the vehicle breaks down and the vehicle enters a limping mode, namely the power-on gear is kept, and the safety of the vehicle is improved. In addition, in the technical scheme of the disclosure, different transmission paths are formed by utilizing the existing radio frequency chip and the main control unit in the vehicle without additionally adding new hardware, thereby being beneficial to reducing complexity and cost.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The terms "front," "back," "top," "bottom," "over," "under," and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.

As used herein, the word "exemplary" means "serving as an example, instance, or illustration," and not as a "model" that is to be replicated accurately. Any implementation exemplarily described herein is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the detailed description.

As used herein, the term "substantially" is intended to encompass any minor variation resulting from design or manufacturing imperfections, device or component tolerances, environmental influences, and/or other factors. The word "substantially" also allows for differences from a perfect or ideal situation due to parasitics, noise, and other practical considerations that may exist in a practical implementation.

The above description may indicate elements or nodes or features being "connected" or "coupled" together. As used herein, unless expressly stated otherwise, "connected" means that one element/node/feature is directly connected to (or directly communicates with) another element/node/feature, either electrically, mechanically, logically, or otherwise. Similarly, unless expressly stated otherwise, "coupled" means that one element/node/feature may be mechanically, electrically, logically or otherwise joined to another element/node/feature in a direct or indirect manner to allow interaction, even though the two features may not be directly connected. That is, coupled is intended to include both direct and indirect joining of elements or other features, including connection with one or more intermediate elements.

It will be further understood that the terms "comprises/comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Those skilled in the art will appreciate that the boundaries between the above described operations merely illustrative. Multiple operations may be combined into a single operation, single operations may be distributed in additional operations, and operations may be performed at least partially overlapping in time. Moreover, alternative embodiments may include multiple instances of a particular operation, and the order of operations may be altered in various other embodiments. However, other modifications, variations, and alternatives are also possible. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. The various embodiments disclosed herein may be combined in any combination without departing from the spirit and scope of the present disclosure. It will also be appreciated by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A power supply gear control method is characterized by comprising the following steps:

2. The power source notch control method according to claim 1, characterized by further comprising:

3. The power source notch control method according to claim 1, characterized by further comprising:

4. The power supply step control method according to claim 3, wherein the first preset condition is determined to be satisfied when the first feedback signal indicates that the first control signal is successfully transmitted, and the first preset condition is determined not to be satisfied otherwise.

5. The power source notch control method according to claim 3, characterized by further comprising:

6. The power source notch control method according to claim 1, characterized by further comprising:

7. The power source notch control method according to claim 6, characterized by further comprising:

8. The power range control method of claim 1, wherein generating a third control signal to drive to the target range if the first and second control signals satisfy a second preset condition comprises:

when the target gear is a power-on gear, generating the third control signal under the condition that at least one of the first control signal and the second control signal is successfully transmitted; and/or

9. A power supply step control device, characterized by comprising:

a master unit configured to:

a radio frequency chip communicatively connected with the master control unit;

a latch unit communicatively connected with the radio frequency chip;

receiving a second control signal from the master control unit,

10. The power supply position control device according to claim 9, wherein the latch unit is further configured to maintain the current control signal if the first preset condition is not satisfied.

11. The power supply position control device according to claim 9, wherein the main control unit is further configured to continue to attempt to generate and transmit the first control signal if the first preset condition is not satisfied.

12. The power source gear control device of claim 9, wherein the latch unit is further configured to generate a first feedback signal and transmit the first feedback signal to the master control unit, wherein the first feedback signal is configured to indicate whether the first control signal was successfully transmitted from the latch unit to the logic unit.

13. The power supply position control device according to claim 12, wherein the first preset condition is determined to be satisfied when the first control signal is successfully transmitted from the latch unit to the logic unit, and is determined not to be satisfied otherwise.

14. The power source notch control device of claim 12, wherein the main control unit is further configured to generate and record a first error message when the first feedback signal indicates that the first control signal failed to be successfully transmitted from the latch unit to the logic unit and the third control signal fails to be generated.

15. The power notch control device of claim 9, wherein the logic unit is further configured to generate a second feedback signal and transmit the second feedback signal to the master control unit, wherein the second feedback signal is configured to indicate whether the third control signal was successfully generated.

16. The power notch control device of claim 15, wherein the master control unit is further configured to generate and record a second error message and/or continue to attempt to generate and transmit at least one of the first control signal and the second control signal if the second feedback signal indicates that the third control signal was not successfully generated.

17. The power source gear control device of claim 9, wherein the logic unit is configured to:

18. A power supply step control device according to claim 9, wherein the latch unit comprises a static random access memory.

19. A keyless entry system comprising a power source position control apparatus as claimed in any of claims 9 to 18.

20. A vehicle characterized in that the vehicle includes the power supply position control apparatus according to any one of claims 9 to 18 or the keyless entry system according to claim 19.