CN118046903A - Method and device for processing abnormal engine rotation speed, automatic gearbox control unit and medium - Google Patents

Abstract

The embodiment of the invention discloses an engine rotating speed abnormality processing method, an engine rotating speed abnormality processing device, an automatic gearbox control unit and a medium. The method is applied to an automatic gearbox control unit which is arranged in a target vehicle, wherein an engine and a transmission are also arranged in the target vehicle, and the method comprises the following steps: determining whether an engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission receives the engine speed signal of the engine; under the condition of abnormal engine speed, the abnormal type of the abnormal engine speed can be obtained according to the determination basis of the abnormal engine speed; an abnormality processing policy corresponding to the abnormality type is determined to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing policy. According to the technical scheme provided by the embodiment of the invention, the abnormal engine speed is identified, and the corresponding abnormal processing strategy is adopted to process the abnormal engine speed on the basis, so that the driving safety can be ensured.

Description

Method and device for processing abnormal engine rotation speed, automatic gearbox control unit and medium

Technical Field

The embodiment of the invention relates to the technical field of vehicles, in particular to an engine rotating speed abnormality processing method and device, an automatic gearbox control unit and a medium.

Background

In the current whole vehicle project carried by an automatic transmission, an engine system is used as a power input end of the transmission system, and an engine rotation speed signal is an important input signal for the transmission system.

On the basis, under the condition that the transmission system determines that the engine speed is abnormal according to the received engine speed signal, the abnormality processing of the engine speed is required to be carried out so as to ensure the driving safety.

However, the current abnormality handling scheme adopted for the rotation speed of the engine cannot guarantee driving safety and needs to be solved.

Disclosure of Invention

The embodiment of the invention provides an engine rotating speed abnormality processing method, an engine rotating speed abnormality processing device, an automatic gearbox control unit and a medium, which solve the problem that driving safety cannot be ensured when the engine rotating speed is abnormal.

According to an aspect of the present invention, there is provided an engine speed abnormality processing method applied to an automatic transmission control unit provided in a target vehicle in which an engine and a transmission are further provided, the method including:

determining whether an engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission receives the engine speed signal of the engine;

under the condition of abnormal engine speed, according to the determination basis of the abnormal engine speed, obtaining the abnormal type of the abnormal engine speed;

An abnormality processing policy corresponding to the abnormality type is determined to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing policy.

According to another aspect of the present invention, there is provided an engine speed abnormality processing apparatus provided in an automatic transmission control unit provided in a target vehicle in which an engine and a transmission are further provided, the apparatus comprising:

The engine speed abnormality determining module is used for determining whether the engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission receives the engine speed signal of the engine;

The abnormal type obtaining module is used for obtaining the abnormal type of the abnormal engine speed according to the determination basis of the abnormal engine speed under the condition of abnormal engine speed;

The engine speed abnormality processing module is used for determining an abnormality processing strategy corresponding to the abnormality type so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing strategy.

According to another aspect of the present invention, there is provided an automatic transmission control unit, which may include:

at least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to cause the at least one processor to implement the engine speed anomaly handling method provided by any embodiment of the present invention when executed.

According to another aspect of the present invention, there is provided a computer-readable storage medium having stored thereon computer instructions for causing a processor to execute the engine speed abnormality processing method provided by any of the embodiments of the present invention.

According to the technical scheme provided by the embodiment of the invention, the TCU can determine whether the engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission is detected to receive the engine speed signal of the engine; then, under the condition of abnormal engine speed, the abnormal type of the abnormal engine speed can be obtained according to the determination basis of the abnormal engine speed; then, an abnormality processing policy corresponding to the abnormality type may be determined, so that the engine speed under the abnormality type is subjected to abnormality processing based on the abnormality processing policy. According to the technical scheme, the abnormal engine speed is identified, and corresponding abnormal processing strategies are adopted for processing the engine speeds under different abnormal types, so that compared with the implementation scheme that the same abnormal processing strategy is directly adopted for carrying out abnormal processing on the engine speed when the engine speed is abnormal, the specific abnormal processing scheme can effectively ensure driving safety.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention, nor is it intended to be used to limit the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of an engine speed exception handling method provided in accordance with an embodiment of the present invention;

FIG. 2 is a flow chart of another engine speed exception handling method provided in accordance with an embodiment of the present disclosure;

FIG. 3 is a flowchart of yet another engine speed exception handling method provided in accordance with an embodiment of the present disclosure;

FIG. 4 is a flowchart of yet another engine speed exception handling method provided in accordance with an embodiment of the present disclosure;

Fig. 5 is a block diagram of an engine speed abnormality processing device provided according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an automatic transmission control unit that implements the engine speed abnormality processing method in the embodiment of the invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. The cases of "target", "original", etc. are similar and will not be described in detail herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a flowchart of an engine speed abnormality processing method provided in an embodiment of the present invention. The embodiment is applicable to the case of performing abnormality processing on the engine speed identified as abnormal, and is particularly applicable to the case of performing abnormality processing by adopting corresponding abnormality processing strategies for the engine speeds under different abnormality types (i.e., abnormal conditions), respectively. The method can be implemented by the engine speed abnormality processing device provided by the embodiment of the invention, the device can be implemented by software and/or hardware, the device can be integrated on a transmission system, and particularly can be integrated on an automatic transmission control unit (Transmission Control Unit, TCU) for realizing automatic transmission control of a vehicle in the transmission system, the TCU can be arranged in a target vehicle, and the engine and the transmission can be arranged in the target vehicle.

Referring to fig. 1, the method of the embodiment of the present invention specifically includes the following steps:

S110, under the condition that the transmission receives an engine speed signal of the engine, determining whether the engine speed of the engine is abnormal according to the engine speed signal.

The engine speed is understood to be the speed of the engine. The engine speed signal may be understood as a signal for characterizing the engine speed, optionally transmitted via a controller area network (Controller Area Network, CAN), in connection with the application scenario to which the embodiments of the present invention may relate; still alternatively, the engine speed signal may be acquired based on an engine speed sensor.

The TCU may determine whether the engine speed is abnormal based on the engine speed signal when it detects that the transmission has received the engine speed signal. In combination with the application scenario possibly related to the embodiment of the invention, whether the engine speed is abnormal or not can be determined in various modes, for example, whether the engine speed is abnormal or not can be determined according to whether the engine speed signal is abnormal or not; whether the engine speed is abnormal may be determined based on whether the engine speed characterized by the engine speed signal (referred to herein as the characterized speed) is overspeed; also, in the case where the engine speed signal is normal, whether the engine speed is abnormal may be determined based on whether the engine speed calculated based on the remaining signals (referred to herein as the actual speed) exceeds the speed; etc., and are not particularly limited herein.

S120, under the condition that the engine speed is abnormal, obtaining the abnormal type of the engine speed abnormality according to the determination basis of the engine speed abnormality.

The determination basis can be understood as the basis for determining the abnormal engine speed. From the above description, it is clear that it is possible to determine whether the engine speed is abnormal in various ways, and thus that there are various possibilities for determining the basis in case of an abnormality of the engine speed. Here, taking the above example as an example, the determination may be based on an abnormality of the engine speed signal, a characteristic speed overspeed, or an actual speed overspeed, etc., which is not particularly limited herein.

The abnormality type may be understood as a specific type of abnormality in the engine speed. In connection with the application scenario possibly related to the embodiment of the present invention, it may be understood that the types of anomalies corresponding to the determined engine speed anomalies based on different determination bases may be the same or different. Here, taking the above example as an example, when the determination basis is that the engine speed signal is abnormal, the corresponding abnormality type may be a signal abnormality, that is, an engine speed signal abnormality; when the determination basis is that the characterization rotational speed exceeds the speed limit or the actual rotational speed exceeds the speed limit, the corresponding abnormal type can be overspeed abnormality, namely engine rotational speed overspeed abnormality; etc., and are not particularly limited herein.

From the above description, it is known that the abnormality type of the engine speed can be identified based on the determination basis. In practical applications, optionally, there are multiple abnormal situations in the engine speed, and one abnormal situation corresponds to one abnormal type, so the abnormal type obtained in this step may also be directly referred to as an abnormal situation.

S130, determining an abnormality processing strategy corresponding to the abnormality type, so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing strategy.

It should be noted that, the engine speeds under different abnormal conditions (i.e., abnormal types) may have different influences on the whole vehicle and the driver, which means that if the same abnormality processing strategy is adopted to process the engine speeds under the different abnormal conditions, the driving safety may not be ensured.

Therefore, after obtaining the abnormality type, the embodiment of the present invention determines an abnormality processing policy corresponding to the abnormality type, where the abnormality processing policy may be understood as a policy for processing the engine speed under the abnormality type, and the above example may be, for example, using the last valid engine speed corresponding to the signal abnormality or entering engine overspeed abnormality post-processing corresponding to the overspeed abnormality, and the like, which is not specifically limited herein; then, based on the abnormality processing strategy, targeted abnormality processing can be performed on the engine speed under the abnormality type, so that driving safety can be effectively ensured.

In practical applications, the above-described abnormality processing strategy may also be referred to as a fault processing strategy, since an engine speed abnormality is also understood as an engine speed fault.

According to the technical scheme provided by the embodiment of the invention, the TCU can determine whether the engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission is detected to receive the engine speed signal of the engine; then, under the condition of abnormal engine speed, the abnormal type of the abnormal engine speed can be obtained according to the determination basis of the abnormal engine speed; then, an abnormality processing policy corresponding to the abnormality type may be determined, so that the engine speed under the abnormality type is subjected to abnormality processing based on the abnormality processing policy. According to the technical scheme, the abnormal engine speed is identified, and corresponding abnormal processing strategies are adopted for processing the engine speeds under different abnormal types, so that compared with the implementation scheme that the same abnormal processing strategy is directly adopted for carrying out abnormal processing on the engine speed when the engine speed is abnormal, the specific abnormal processing scheme can effectively ensure driving safety.

Fig. 2 is a flowchart of another engine speed abnormality processing method provided in an embodiment of the invention. The present embodiment is optimized based on the above technical solutions. In this embodiment, optionally, determining whether the engine speed of the engine is abnormal according to the engine speed signal includes: determining whether the engine speed signal is abnormal or not, and determining whether the engine speed of the engine is abnormal or not according to an abnormal determination result of the engine speed signal; correspondingly, according to the determination basis of the abnormal engine speed, obtaining the abnormal type of the abnormal engine speed comprises the following steps: when the determination basis of the engine speed abnormality is an engine speed signal abnormality, the signal abnormality is regarded as an abnormality type of the engine speed abnormality. The same or corresponding terms as those of the above embodiments are not repeated herein.

Referring to fig. 2, the method of this embodiment may specifically include the following steps:

s210, under the condition that the transmission receives an engine speed signal of the engine, determining whether the engine speed signal is abnormal, and determining whether the engine speed of the engine is abnormal according to an abnormality determination result of the engine speed signal.

In practical applications, the engine speed signal transmitted via the CAN may be an abnormal signal, i.e., a signal that cannot characterize the effective engine speed. In combination with the application scenario possibly related to the embodiment of the invention, for example, according to the network standardization protocol, during normal running of the vehicle, the engine speed is a certain effective value within a preset speed range, so that when the CAN detects that the engine speed acquired by the engine speed sensor is not within the preset speed range, an ineffective signal which is preset and used for indicating that the engine speed is ineffective CAN be used as an engine speed signal to be sent to the transmission, and the engine speed signal received by the transmission is an abnormal signal; for another example, when the authenticity verification of the engine speed acquired by the engine speed sensor is not passed, the CAN may send a preset error signal representing an error in the engine speed to the transmission as an engine speed signal, where the engine speed signal received by the transmission is an abnormal signal; etc., and are not particularly limited herein.

The anomaly determination result may be indicative of whether the engine speed signal is anomalous. From the above analysis, it is possible to determine whether the engine speed is abnormal by determining whether the engine speed signal is abnormal, and then determining whether the engine speed is abnormal based on the obtained abnormality determination result, for example, when the engine speed signal is abnormal; otherwise (i.e., in the case where the engine speed signal is normal), the engine speed is normal.

S220, taking the signal abnormality as an abnormality type of the engine speed abnormality when the engine speed is abnormal and the determination basis of the engine speed abnormality is the abnormality of the engine speed signal.

When the abnormality of the engine speed signal is used as a determination basis and the engine speed abnormality is determined, the abnormality of the signal, namely the abnormality of the engine speed signal, can be used as an abnormality type.

S230, determining an abnormality processing strategy corresponding to the abnormality type, so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing strategy.

In practical applications, optionally, in the case that the abnormality type is a signal abnormality, this indicates that the engine speed signal 1 received by the transmission cannot characterize the effective engine speed, that is, cannot be effectively applied by the transmission, so in order to ensure driving safety, the abnormality processing policy corresponding to the signal abnormality may be to use a historical speed signal as an input signal currently applied to the transmission, where the historical speed signal may be a normal engine speed signal 2 received before the engine speed signal 1, and especially may be the engine speed signal 2 recently received in each engine speed signal 2, that is, the engine speed signal 2 corresponding to the last normal (that is, effective) engine speed compared with the currently received engine speed signal 1, which facilitates automatic transmission based on the effective and recent engine speed.

According to the technical scheme provided by the embodiment of the invention, whether the engine speed is abnormal or not is determined according to the abnormal condition of the engine speed signal, and the abnormal type of the engine speed abnormality determined in the way is used as the signal abnormality, so that the abnormality processing can be further carried out by adopting a corresponding abnormality processing strategy based on the signal abnormality, and the targeted processing of the engine speed abnormality under the signal abnormality is realized.

Fig. 3 is a flowchart of still another engine speed abnormality processing method provided in an embodiment of the invention. The present embodiment is optimized based on the above technical solutions. In this embodiment, optionally, determining whether the engine speed of the engine is abnormal according to the engine speed signal includes: determining whether the characteristic rotating speed represented by the engine rotating speed signal exceeds a preset first overspeed threshold value, and determining whether the engine rotating speed of the engine is abnormal according to the overspeed determination result of the characteristic rotating speed; correspondingly, according to the determination basis of the abnormal engine speed, obtaining the abnormal type of the abnormal engine speed comprises the following steps: and taking the overspeed abnormality as an abnormality type of the engine speed abnormality when the determination basis of the engine speed abnormality is that the characterization speed exceeds a first overspeed threshold value. Wherein, the explanation of the same or corresponding terms as the above embodiments is not repeated herein.

Referring to fig. 3, the method of this embodiment may specifically include the following steps:

S310, under the condition that the transmission receives an engine speed signal of the engine, determining whether the representation speed represented by the engine speed signal exceeds a preset first overspeed threshold value, and determining whether the engine speed of the engine is abnormal according to an overspeed determination result of the representation speed.

The characteristic rotational speed is understood to be the engine rotational speed characterized by the engine rotational speed signal. The first overspeed threshold value may be understood as a threshold value preset for the engine that relates to overspeed of the engine. In combination with the application scenario possibly related to the embodiment of the invention, optionally, the first overspeed threshold value may be preset according to a maximum rotation speed, and the maximum rotation speed may be understood as a rotation speed preset for the engine and representing the highest outputtable of the engine, and the rotation speed may ensure safe rotation of the engine, so as to avoid damage of engine hardware due to high-speed rotation. On this basis, the first overspeed threshold value can be calculated by, for example, the following: first overspeed threshold=maximum rotation speed (1+m%), where M is a positive number.

The overspeed determination can characterize whether the rotational speed exceeds a first overspeed threshold. Determining whether the characterization rotational speed exceeds a first overspeed threshold value, and determining whether the engine rotational speed is abnormal according to the obtained overspeed determination result, for example, when the characterization rotational speed exceeds the first overspeed threshold value, the engine rotational speed is abnormal; otherwise (i.e., when the characterized speed does not exceed the first overspeed threshold value), the engine speed is normal.

In practical application, optionally, under the condition that the characterization rotating speed exceeds the first overspeed threshold value, whether the exceeding time of the characterization rotating speed exceeding the first overspeed threshold value is longer than the first preset time period or not can be further determined, and under the condition that the exceeding time of the characterization rotating speed exceeding the first overspeed threshold value is longer than the first preset time period, the abnormal engine rotating speed is determined, so that the condition that the abnormal engine rotating speed is misjudged due to the fact that the characterization rotating speed accidentally exceeds the first overspeed threshold value is avoided.

It will be appreciated that the above-mentioned maximum rotational speed, M and the first preset time period, can be specifically calibrated according to the vehicle type and/or the engine type and the like, and is not specifically limited herein.

S320, taking the overspeed abnormality as an abnormality type of the engine speed abnormality in the case that the engine speed is abnormal and the determination basis of the engine speed abnormality is that the characterization speed exceeds a first overspeed threshold value.

Under the condition that the characteristic rotating speed exceeds the first overspeed threshold value as a determination basis and the abnormal engine rotating speed is determined, the overspeed abnormality, namely the abnormal engine rotating speed overspeed abnormality, can be used as an abnormality type.

S330, determining an abnormality processing strategy corresponding to the abnormality type so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing strategy.

In practical application, optionally, the abnormality processing policy corresponding to the overspeed abnormality may be to enter into the processing after the overspeed abnormality of the engine speed, and perform the overspeed reminding of the engine speed, for example, light a fault lamp and/or perform corresponding text reminding on an instrument panel, which is not specifically limited herein.

According to the technical scheme provided by the embodiment of the invention, whether the engine speed is abnormal or not is determined by representing whether the speed exceeds the first overspeed threshold value, and the abnormal type of the abnormal engine speed is used as overspeed abnormality, so that the abnormal processing can be further carried out by adopting a corresponding abnormality processing strategy based on the overspeed abnormality, and the targeted processing of the abnormal engine speed under the overspeed abnormality is realized.

An optional technical solution, according to the overspeed determination result of the characterization rotation speed, determines whether the engine rotation speed of the engine is abnormal, including:

under the condition that the overspeed determination result of the characterization rotating speed is that the characterization rotating speed does not exceed the first overspeed threshold value, calculating the actual rotating speed of the engine according to the received rotating speed of the output shaft of the transmission, and determining whether the actual rotating speed exceeds a preset second overspeed threshold value;

Determining whether the engine speed is abnormal according to the overspeed determination result of the actual speed;

correspondingly, according to the determination basis of the abnormal engine speed, obtaining the abnormal type of the abnormal engine speed, and further comprising:

and when the determination basis of the engine speed abnormality is that the actual speed exceeds the second overspeed threshold value, taking the overspeed abnormality as an abnormality type of the engine speed abnormality.

Under the condition that the characterization rotating speed does not exceed the first overspeed threshold value, taking into consideration that the characterization rotating speed can be acquired through an engine rotating speed sensor, but the engine rotating speed sensor is not completely reliable, namely, the characterization rotating speed acquired through the engine rotating speed sensor can have deviation, so that in order to further ensure driving safety, whether the actual rotating speed is abnormal or not can be checked secondarily when the actual rotating speed does not overspeed.

In particular, considering that the transmission output shaft speed sensor is more reliable, the actual speed of the engine (i.e., the speed at which the engine should be) may be calculated based on the received output shaft speed, which may be derived from a transmission output shaft speed signal transmitted via the CAN, which may be collected by a transmission output shaft speed sensor provided in the transmission assembly itself.

Further, determining whether the actual rotation speed exceeds a preset second overspeed threshold value, and then determining whether the engine rotation speed is abnormal according to the overspeed determination result of the actual rotation speed, for example, when the actual rotation speed exceeds the second overspeed threshold value, the engine rotation speed is abnormal; otherwise (i.e., in the case where the actual rotational speed does not exceed the second overspeed threshold value), the engine rotational speed is normal. The second overspeed threshold value is similar to the first overspeed threshold value in meaning, and is not described herein again. The second overspeed threshold value may be the same as or different from the first overspeed threshold value, which may be set according to actual requirements, and is not specifically limited herein.

In practical application, optionally, under the condition that the actual rotation speed exceeds the second overspeed threshold value, whether the exceeding time of the actual rotation speed exceeding the second overspeed threshold value is longer than the second preset time period or not can be further determined, and under the condition that the exceeding time of the actual rotation speed exceeding the second overspeed threshold value is longer than the second preset time period, the abnormality of the rotation speed of the engine is determined, so that the situation that the abnormality judgment of the rotation speed of the engine is wrong due to the fact that the actual rotation speed accidentally exceeds the second overspeed threshold value is avoided. The second preset duration is similar to the first preset duration in meaning, and will not be described in detail herein. The second preset duration may be the same as or different from the first preset duration, which may be set according to actual requirements, and is not specifically limited herein.

Still further, in the case where the abnormality of the engine speed is determined by taking the actual speed exceeding the second overspeed threshold value as a determination basis, the overspeed abnormality, that is, the abnormality of the engine speed overspeed may be taken as an abnormality type.

According to the technical scheme, through the more reliable output shaft rotating speed, the abnormal engine rotating speed is subjected to secondary verification, so that the driving safety can be further ensured.

On the basis of this, optionally, according to the received output shaft rotational speed of the speed changer, calculate the actual rotational speed of the engine, include:

Determining whether a current gear of the target vehicle is a driving gear and is currently in a gear shifting process, wherein the driving gear is any one of a forward gear and a reverse gear;

When the current gear is a driving gear and is not currently in the gear shifting process, the actual rotation speed of the engine is calculated according to the gear ratio of the current gear and the received rotation speed of the output shaft of the transmission.

The current gear is understood to be the gear currently engaged by the target vehicle. The driving gear may be understood as a gear representing a current driving state of the target vehicle, and may be any one of a forward gear (i.e., D gear, such as 1 gear, 2 gear, 3 gear, etc.) and a reverse gear (i.e., R gear) in combination with an application scenario possibly related to the embodiment of the present invention. The gear speed ratio is understood to be the speed ratio of the current gear.

It should be noted that, the respective gear positions have different corresponding speed ratios, the speed ratios are related to the hardware structure of the transmission, and different transmissions have corresponding speed ratios in different gear positions. Therefore, the actual rotational speed can be calculated from the gear ratio and the output shaft rotational speed in the case where the current gear is the running gear and the target vehicle is not currently in the shift process, i.e., the target vehicle is currently running in the fixed gear.

According to the technical scheme, under the condition that the target vehicle is currently in a fixed gear and runs, accurate calculation of the actual rotation speed is achieved by combining the gear speed ratio and the rotation speed of the output shaft.

On the basis, optionally, an abnormality processing strategy corresponding to overspeed abnormality can be to keep the current gear, namely stop responding to the upshift request and carry out engine speed overspeed reminding.

Fig. 4 is a flowchart of still another engine speed abnormality processing method provided in an embodiment of the invention. The present embodiment is optimized based on the above technical solutions. The same or corresponding terms as those of the above embodiments are not repeated herein.

Referring to fig. 4, the method of this embodiment may specifically include the following steps:

S410, judging whether the transmission receives an engine speed signal of an engine transmitted through the CAN? If yes, then S420 is performed; otherwise, it is determined that the engine speed of the engine is abnormal and the type of abnormality is signal loss, S430 is performed.

Wherein, for the case that the transmission does not receive the engine speed signal, especially the engine speed signal and other engine related signals, the engine speed is determined to be abnormal, and the abnormal type is signal loss, that is, the engine speed signal is lost, specifically, the engine node signal is lost, S430 may be executed to perform targeted abnormality processing on the abnormal engine speed.

S420, judging whether the engine speed signal is abnormal? If so, determining that the engine speed is abnormal and the type of abnormality is a signal abnormality, performing S430; otherwise, S440 is performed.

S430, under the condition that the abnormal type is signal loss or signal abnormality, taking the historical rotation speed signal as an input signal of the current application of the transmission, wherein the historical rotation speed signal is the last received normal rotation speed signal of the engine compared with the current received rotation speed signal of the engine.

S440, judging whether the characteristic rotating speed exceeds a preset first overspeed threshold value according to the characteristic rotating speed represented by the engine rotating speed signal? If yes, then execution S490; otherwise, S450 is performed.

S450. is it determined whether the current gear of the target vehicle is any one of the forward gear (D gear) and the reverse gear (R gear? If yes, then S460 is performed; otherwise, execution returns to S410.

S460. determine whether the target vehicle is currently in the process of shifting? If not, then S470 is performed; otherwise, execution returns to S410.

S470, calculating the actual rotation speed of the engine according to the gear speed ratio and the rotation speed of an output shaft, wherein the gear speed ratio is the current gear speed ratio, and the rotation speed of the output shaft is the rotation speed of the output shaft of the transmission represented by a transmission output shaft rotation speed signal transmitted through the CAN.

S480, judging whether the actual rotation speed exceeds a preset second overspeed threshold value? If yes, then execution S490; otherwise, execution returns to S410.

S490, recording the abnormal engine speed, and processing after the abnormal engine speed, wherein the abnormal type is overspeed.

According to the technical scheme provided by the embodiment of the invention, on the basis of the existing whole vehicle system scheme, a new sensor is not needed, the existing sensor of the vehicle CAN be used, the engine speed signals transmitted by the CAN are detected in real time, and corresponding judgment and abnormality processing are carried out on the engine speeds under different abnormal conditions, so that the driving safety CAN be ensured.

Fig. 5 is a block diagram of an engine speed abnormality processing apparatus according to an embodiment of the present invention, which is configured to execute the engine speed abnormality processing method according to any of the above embodiments. The device belongs to the same inventive concept as the engine speed abnormality processing method of each of the above embodiments, and reference may be made to the above embodiments of the engine speed abnormality processing method for details that are not described in detail in the embodiments of the engine speed abnormality processing device. Referring to fig. 5, the apparatus is configured in an automatic transmission control unit that is provided in a target vehicle in which an engine and a transmission are further provided, and may specifically include: an engine speed anomaly determination module 510, an anomaly type derivation module 520, and an engine speed anomaly processing module 530.

Wherein, the engine speed abnormality determination module 510 is configured to determine whether an engine speed of the engine is abnormal according to the engine speed signal when the transmission receives the engine speed signal of the engine;

the abnormality type obtaining module 520 is configured to obtain an abnormality type of the abnormality of the engine speed according to a determination basis of the abnormality of the engine speed in the case of the abnormality of the engine speed;

the engine speed abnormality processing module 530 is configured to determine an abnormality processing policy corresponding to the abnormality type, so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing policy.

Optionally, the engine speed anomaly determination module 510 may include:

The first determining submodule for determining whether the engine speed signal is abnormal or not can be used for determining whether the engine speed of the engine is abnormal or not according to the abnormal determining result of the engine speed signal;

Accordingly, the exception type obtaining module 520 may include:

The abnormal type first obtaining submodule is used for taking the signal abnormality as the abnormal type of the engine rotating speed abnormality when the determining basis of the engine rotating speed abnormality is the engine rotating speed signal abnormality.

On the basis, optionally, the abnormality processing strategy corresponding to the signal abnormality is to use a historical rotation speed signal as an input signal of the transmission currently applied, wherein the historical rotation speed signal is a normal engine rotation speed signal received before the engine rotation speed signal.

Optionally, the engine speed anomaly determination module 510 may include:

the second determining submodule is used for determining whether the representation rotation speed represented by the engine rotation speed signal exceeds a preset first overspeed threshold value or not, and determining whether the engine rotation speed of the engine is abnormal or not according to the overspeed determining result of the representation rotation speed;

Accordingly, the exception type obtaining module 520 may include:

and the abnormal type second obtaining submodule is used for taking the overspeed abnormality as the abnormal type of the engine rotating speed abnormality when the determination basis of the engine rotating speed abnormality is that the characteristic rotating speed exceeds the first overspeed threshold value.

On this basis, optionally, the engine speed abnormality second determination submodule may include:

The actual rotating speed overspeed determining unit is used for calculating the actual rotating speed of the engine according to the received rotating speed of the output shaft of the transmission and determining whether the actual rotating speed exceeds a preset second overspeed threshold value under the condition that the overspeed determining result of the characterization rotating speed is that the characterization rotating speed does not exceed the first overspeed threshold value;

an engine speed abnormality determination unit configured to determine whether the engine speed is abnormal, based on an overspeed determination result of the actual speed;

accordingly, the exception type obtaining module 520 may further include:

And a third obtaining submodule for taking the overspeed abnormality as the abnormality type of the engine speed abnormality when the determination of the engine speed abnormality is based on that the actual speed exceeds the second overspeed threshold value.

On this basis, optionally, the actual rotational speed overspeed determining unit may include:

a target vehicle gear shifting determining subunit, configured to determine whether a current gear of the target vehicle is a driving gear and is currently in a gear shifting process, where the driving gear is any one of a forward gear and a reverse gear;

and the actual rotating speed calculating subunit is used for calculating the actual rotating speed of the engine according to the gear speed ratio of the current gear and the received rotating speed of the output shaft of the transmission under the condition that the current gear is a driving gear and the current gear is not in a gear shifting process.

On the basis, the first overspeed threshold value and the second overspeed threshold value are both obtained according to the preset highest rotating speed of the engine; and/or the number of the groups of groups,

And the abnormality processing strategy corresponding to the overspeed abnormality is to keep the current gear and carry out overspeed reminding on the rotating speed of the engine.

According to the engine speed abnormality processing device provided by the embodiment of the invention, the TCU can determine whether the engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission is detected to receive the engine speed signal of the engine through the engine speed abnormality determining module; then, an abnormal type obtaining module is used for obtaining the abnormal type of the engine rotating speed abnormality according to the determining basis of the engine rotating speed abnormality under the condition that the engine rotating speed is abnormal; then, an abnormality processing strategy corresponding to the abnormality type can be determined by the engine speed abnormality processing module, so that the engine speed under the abnormality type is subjected to abnormality processing based on the abnormality processing strategy. According to the device, the abnormal engine speed is identified, and the corresponding abnormal processing strategies are adopted for processing the engine speeds under different abnormal types, so that compared with the implementation scheme that the same abnormal processing strategy is directly adopted for carrying out the abnormal processing of the engine speed when the engine speed is abnormal, the specific abnormal processing scheme can effectively ensure driving safety.

The engine speed abnormality processing device provided by the embodiment of the invention can execute the engine speed abnormality processing method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

It should be noted that, in the above embodiment of the engine speed abnormality processing device, each unit and module included are only divided according to the functional logic, but are not limited to the above division, as long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.

Fig. 6 shows a schematic structural diagram of an automatic transmission control unit 10 that can be used to implement an embodiment of the present invention. Automatic transmission control units are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The automatic gearbox control unit may also represent various forms of mobile devices such as personal digital assistants, cellular telephones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 6, the automatic transmission control unit 10 includes at least one processor 11, and a memory such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc. communicatively connected to the at least one processor 11, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the automatic transmission control unit 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

Various components in the automatic transmission control unit 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the automatic transmission control unit 10 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the respective methods and processes described above, such as an engine speed abnormality processing method.

In some embodiments, the engine speed anomaly handling method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the automatic transmission control unit 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the engine speed abnormality processing method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the engine speed exception handling method by any other suitable means (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an automatic transmission control unit having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the automatic transmission control unit. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. An engine speed abnormality processing method, characterized in that the method is applied to an automatic transmission control unit provided in a target vehicle in which an engine and a transmission are also provided, the method comprising:

determining whether an engine speed of the engine is abnormal according to an engine speed signal of the engine under the condition that the transmission receives the engine speed signal of the engine;

Under the condition that the engine speed is abnormal, obtaining an abnormal type of the engine speed abnormality according to the determination basis of the engine speed abnormality;

And determining an abnormality processing strategy corresponding to the abnormality type so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing strategy.

2. The method of claim 1, wherein said determining whether an engine speed of the engine is abnormal based on the engine speed signal comprises:

Determining whether the engine speed signal is abnormal or not, and determining whether the engine speed of the engine is abnormal or not according to an abnormal determination result of the engine speed signal;

correspondingly, the obtaining the abnormal type of the abnormal engine speed according to the determining basis of the abnormal engine speed comprises the following steps:

And when the determination basis of the engine speed abnormality is that the engine speed signal abnormality, taking the signal abnormality as an abnormality type of the engine speed abnormality.

3. The method of claim 2, wherein the anomaly handling policy corresponding to the signal anomaly is to take a historical speed signal as an input signal to the transmission currently being applied, the historical speed signal being a normal engine speed signal received prior to the engine speed signal.

4. The method of claim 1, wherein said determining whether an engine speed of the engine is abnormal based on the engine speed signal comprises:

Determining whether the representation rotation speed represented by the engine rotation speed signal exceeds a preset first overspeed threshold value, and determining whether the engine rotation speed of the engine is abnormal according to the overspeed determination result of the representation rotation speed;

correspondingly, the obtaining the abnormal type of the abnormal engine speed according to the determining basis of the abnormal engine speed comprises the following steps:

And taking overspeed abnormality as an abnormality type of the engine speed abnormality when the determination basis of the engine speed abnormality is that the characterization speed exceeds the first overspeed threshold value.

5. The method according to claim 4, wherein the determining whether the engine speed of the engine is abnormal based on the overspeed determination result of the characterization speed includes:

calculating the actual rotation speed of the engine according to the received rotation speed of the output shaft of the transmission under the condition that the overspeed determination result of the characterization rotation speed is that the characterization rotation speed does not exceed the first overspeed threshold value, and determining whether the actual rotation speed exceeds a preset second overspeed threshold value;

Determining whether the engine speed is abnormal according to the overspeed determination result of the actual speed;

Correspondingly, the obtaining the abnormal type of the abnormal engine speed according to the determining basis of the abnormal engine speed further comprises:

and taking the overspeed abnormality as an abnormality type of the engine speed abnormality in the case that the determination basis of the engine speed abnormality is that the actual speed exceeds the second overspeed threshold value.

6. The method of claim 5, wherein said calculating an actual rotational speed of the engine from the received rotational speed of the output shaft of the transmission comprises:

Determining whether a current gear of the target vehicle is a driving gear and is currently in a gear shifting process, wherein the driving gear is any one of a forward gear and a reverse gear;

And calculating the actual rotating speed of the engine according to the gear speed ratio of the current gear and the received rotating speed of the output shaft of the transmission under the condition that the current gear is the driving gear and is not in the gear shifting process currently.

7. The method of claim 6, wherein the first overspeed threshold value and the second overspeed threshold value are each preset according to a maximum rotational speed preset for the engine; and/or the number of the groups of groups,

And the abnormality processing strategy corresponding to the overspeed abnormality is to keep the current gear and carry out overspeed reminding on the rotating speed of the engine.

8. An engine speed abnormality processing apparatus, characterized in that the apparatus is arranged in an automatic transmission control unit that is provided in a target vehicle in which an engine and a transmission are further provided, the apparatus comprising:

The engine speed abnormality determining module is used for determining whether the engine speed of the engine is abnormal according to the engine speed signal under the condition that the transmission receives the engine speed signal of the engine;

The abnormal type obtaining module is used for obtaining the abnormal type of the abnormal engine rotating speed according to the determining basis of the abnormal engine rotating speed under the condition that the abnormal engine rotating speed is abnormal;

And the engine speed abnormality processing module is used for determining an abnormality processing strategy corresponding to the abnormality type so as to perform abnormality processing on the engine speed under the abnormality type based on the abnormality processing strategy.

9. An automatic transmission control unit, characterized by comprising:

at least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor to cause the at least one processor to perform the engine speed abnormality processing method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing computer instructions for causing a processor to execute the engine speed abnormality processing method according to any one of claims 1 to 7.