CN111231985A

CN111231985A - Electronic oil pump failure processing method and device for power automobile

Info

Publication number: CN111231985A
Application number: CN201811340446.3A
Authority: CN
Inventors: 赵祥日; 闫丽娟
Original assignee: Borgward Automotive China Co Ltd
Current assignee: Borgward Automotive China Co Ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2020-06-05
Anticipated expiration: 2038-11-12
Also published as: CN111231985B

Abstract

The invention discloses a failure processing method and device for an electronic oil pump of a power automobile. The method comprises the following steps: receiving a fault notification message from an electronic oil pump controller, wherein the fault notification message is used for indicating that the electronic oil pump is in a failure state currently; determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message; and under the failure processing mode of the electronic oil pump of the gearbox, controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile. The invention solves the technical problem that the normal operation of a hybrid electric vehicle is influenced when an electronic oil pump fails to provide lubrication and cooling due to the fact that an oil pump is required to provide lubrication and cooling for a gearbox in the related art.

Description

Electronic oil pump failure processing method and device for power automobile

Technical Field

The invention relates to the field of electric automobiles, in particular to a method and a device for processing failure of an electronic oil pump of a power automobile.

Background

The gearbox is a very important part in the electric automobile, and has the following functions: the transmission ratio is changed, and the torque and the rotating speed of the driving wheel are expanded. With the high-speed development of modern science and technology, the gearbox is also continuously upgraded, and the control mode is simpler and more convenient from the initial manual gearbox to the current stepless gearbox and from the synchronizer-free gearbox to the synchronizer-containing gearbox. The quality of the performance of the gearbox is the key for measuring the dynamic property, the economical efficiency and the drivability of the engineering machinery. The gear shifting mode of the gearbox comprises manual gear shifting and power gear shifting. The structure of the gearbox comprises a fixed shaft structure and a planetary structure.

Currently, transmissions provided in the related art may employ a mechanical pump and an electronic pump in combination to provide lubrication and cooling for transmission gears and shifting clutches, etc. When the hybrid electric vehicle runs purely electrically or starts at a low speed, the gearbox provides lubrication and cooling through the electronic oil pump. However, at this time, if the electronic oil pump malfunctions, the vehicle will not function normally.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

At least part of embodiments of the invention provide a failure processing method and device for an electronic oil pump of a power automobile, so as to solve the technical problem that in the related art, a gearbox needs the oil pump to provide lubrication and cooling, and when the electronic oil pump fails to provide lubrication and cooling, the normal operation of the hybrid automobile is influenced.

According to one embodiment of the invention, the electronic oil pump failure processing method for the power automobile comprises the following steps:

receiving a fault notification message from an electronic oil pump controller, wherein the fault notification message is used for indicating that the electronic oil pump is in a failure state currently; determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message; and under the failure processing mode of the electronic oil pump of the gearbox, controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile.

Optionally, the controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state comprises: when the working state is that the Traction Motor (TM) is driven independently, a neutral position instruction is sent to a gearbox controller, and a starter generator Integrated (ISG) motor is controlled to enter a rotating speed mode; and under the rotating speed mode, determining the target rotating speed of the ISG motor according to the vehicle speed information and the oil temperature information of the gearbox so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox, wherein the target rotating speed is in direct proportion to the vehicle speed information.

Optionally, the controlling the mechanical oil pump to cool and lubricate the transmission according to the working state further comprises: comparing the driving capability of the TM with a required torque of the torque request in response to the torque request; when the required torque is determined to be smaller than the driving capability, the TM driving mode is still kept, and the ISG motor is controlled to drive the mechanical oil pump to cool and lubricate the gearbox; and when the required torque is determined to be larger than the driving capability, sending a driving gear instruction to a gearbox controller, controlling the ISG motor to switch to a torque mode, and outputting a torque instruction to the ISG motor so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state comprises: when the working state is one of four states of engine single drive, ISG motor drive, engine and ISG motor parallel drive and engine and ISG motor parallel power generation, a driving gear instruction is sent to a gearbox controller, and the ISG motor is controlled to enter a torque mode; and under the torque mode, a torque output instruction is sent to the ISG motor or the engine according to the pedal input information so as to control the ISG motor or the engine to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the controlling the mechanical oil pump to cool and lubricate the transmission according to the working state further comprises: when the working state is one of two states of parallel driving of the engine and the ISG motor and parallel power generation of the engine and the ISG motor, responding to a torque request, and adjusting torque instructions of the engine and the ISG motor according to the change trend of the required torque of the torque request so as to control the engine and the ISG motor to drive a mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the controlling the mechanical oil pump to cool and lubricate the transmission according to the working state further comprises: when the working state is the ISG motor drive, responding to a torque request, and adjusting a torque instruction of the ISG motor according to the change trend of the required torque of the torque request so as to control the ISG motor to drive a mechanical oil pump to cool and lubricate the gearbox; or when the driving capability of the ISG motor cannot meet the required torque of the torque request, controlling the engine to start, and switching the working state into the state that the engine and the ISG motor are driven together to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the controlling the mechanical oil pump to cool and lubricate the transmission according to the working state further comprises: when the working state is engine driving, responding to a torque request, and adjusting a torque instruction of the engine according to the change trend of the required torque of the torque request so as to control the engine to drive a mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state comprises: when the working state is a static state, controlling the ISG motor to be in a rotating speed mode; and under the rotating speed mode, controlling the ISG motor to keep the lowest target rotating speed according to the oil temperature information of the gearbox so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state comprises: when the working state is a starting state, controlling the TM to execute a starting operation and controlling the ISG motor to be in a rotating speed mode; and under the rotating speed mode, controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

According to an embodiment of the present invention, there is also provided an electronic oil pump failure processing apparatus for a power vehicle, including:

the electronic oil pump control device comprises a receiving module, a control module and a control module, wherein the receiving module is used for receiving a fault notification message from an electronic oil pump controller, and the fault notification message is used for indicating that the electronic oil pump is in a failure state currently; the determining module is used for determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message; and the processing module is used for controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile in the failure processing mode of the electronic oil pump of the gearbox.

Optionally, the processing module comprises: the first processing unit is used for sending a neutral position instruction to the gearbox controller and controlling the ISG motor to enter a rotating speed mode when the working state is TM independent driving; and under the rotating speed mode, determining the target rotating speed of the ISG motor according to the vehicle speed information and the oil temperature information of the gearbox so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox, wherein the target rotating speed is in direct proportion to the vehicle speed information.

Optionally, the processing module further comprises: a comparison unit for comparing the driving capability of the TM with a required torque of the torque request in response to the torque request; the second processing unit is used for still keeping a TM driving mode when the required torque is determined to be smaller than the driving capability, and controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is determined to be larger than the driving capability, a driving gear instruction is sent to the gearbox controller, the ISG motor is controlled to be switched to a torque mode, and the torque instruction is output to the ISG motor so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module comprises: the third processing unit is used for sending a driving gear instruction to the gearbox controller and controlling the ISG motor to enter a torque mode when the working state is one of four states of engine single drive, ISG motor drive, parallel engine and ISG motor drive and parallel engine and ISG motor power generation; and under the torque mode, a torque output instruction is sent to the ISG motor or the engine according to the pedal input information so as to control the ISG motor or the engine to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module further comprises: the fourth processing unit is used for responding to the torque request and adjusting torque instructions of the engine and the ISG motor according to the change trend of the required torque of the torque request when the working state is one of two states of driving the engine and the ISG motor in parallel and generating power by connecting the engine and the ISG motor in parallel so as to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module further comprises: the fifth processing unit is used for responding to a torque request when the working state is ISG motor driving, and adjusting a torque instruction of the ISG motor according to the change trend of the required torque of the torque request so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the driving capability of the ISG motor cannot meet the required torque of the torque request, controlling the engine to start, and switching the working state into the state that the engine and the ISG motor are driven together to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module further comprises: the sixth processing unit is used for responding to the torque request when the working state is the engine driving state and adjusting a torque instruction of the engine according to the change trend of the required torque of the torque request so as to control the engine to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module comprises: the seventh processing unit is used for controlling the ISG motor to be in a rotating speed mode when the working state is a static state; and under the rotating speed mode, controlling the ISG motor to keep the lowest target rotating speed according to the oil temperature information of the gearbox, so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module comprises: the eighth processing unit is used for controlling the TM to execute starting operation and controlling the ISG motor to be in a rotating speed mode when the working state is the starting state; and under the rotating speed mode, controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

In at least some embodiments of the present invention, the electronic oil pump controller is configured to receive a fault notification message from the electronic oil pump controller, the failure notification message is used for indicating the current failure mode of the electronic oil pump, determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the failure notification message, and under the failure processing mode of the electronic oil pump of the gearbox, the mechanical oil pump is controlled to cool and lubricate the gearbox according to the working state of the power automobile, so as to achieve the purpose of cooling and lubricating the gearbox when the electronic oil pump is abnormal, thereby realizing the technical effect that the hybrid electric vehicle still has the driving capability under the condition that the electronic oil pump is abnormal, and then solved among the relevant art gearbox and needed the oil pump to provide lubrication and cooling, and when the electronic oil pump became invalid and can't provide lubrication and cooling, will influence hybrid vehicle's normal work's technical problem.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic block diagram of a hybrid vehicle having a control system according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for handling a failure of an electronic oil pump of a powered vehicle according to an embodiment of the present invention;

fig. 3 is a block diagram of the electronic oil pump failure processing device of the power automobile according to the embodiment of the invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described 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.

In accordance with one embodiment of the present invention, there is provided an embodiment of a method for handling a failure of an electronic oil pump of a motor vehicle, wherein the steps shown in the flowchart of the drawings may be executed in a computer system, such as a set of computer-executable instructions, and wherein although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from the order shown.

The electronic oil pump failure processing method of the power automobile provided by the embodiment can be executed in a hybrid automobile with a control system. Fig. 1 is a schematic structural diagram of a hybrid vehicle having a control system according to an embodiment of the present invention, as shown in fig. 1, for providing lubrication and cooling to a transmission by changing an operation mode of the hybrid vehicle and coordinating other components. In the hybrid electric vehicle, a front shaft is driven by an engine and a motor, and a rear shaft is driven by the motor. The control system at least comprises: the hybrid electric vehicle comprises a hybrid controller, a controller for controlling an engine, a controller for controlling a clutch, a controller for controlling an Integrated Starter Generator (ISG) Motor, a controller for controlling a Traction Motor (TM), a controller for controlling a gearbox and a controller for controlling a speed reducer, wherein the hybrid controller is responsible for coordinating various power components and transmission components according to input information of a driver so as to control the normal running of the vehicle. In this embodiment, the transmission is cooled and lubricated by two oil pumps, a mechanical oil pump and an electronic oil pump, respectively. The mechanical oil pump is driven by the input shaft of the gearbox, and the electronic oil pump is driven by low-voltage electricity.

Under the operating environment, the invention provides a method for processing the failure of the electronic oil pump of the power automobile shown in FIG. 2. Fig. 2 is a flowchart of an electronic oil pump failure processing method of a power automobile according to an embodiment of the present invention, as shown in fig. 2, the method includes the steps of:

step S22, receiving a fault notification message from the electronic oil pump controller, wherein the fault notification message is used for indicating that the electronic oil pump is in a failure state currently;

step S24, determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message;

and step S26, controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile in the failure processing mode of the electronic oil pump of the gearbox.

Through the above steps, it is possible to adopt a method of receiving a failure notification message from the electronic oil pump controller, the failure notification message is used for indicating the current failure mode of the electronic oil pump, determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the failure notification message, and under the failure processing mode of the electronic oil pump of the gearbox, the mechanical oil pump is controlled to cool and lubricate the gearbox according to the working state of the power automobile, so as to achieve the purpose of cooling and lubricating the gearbox when the electronic oil pump is abnormal, thereby realizing the technical effect that the hybrid electric vehicle still has the driving capability under the condition that the electronic oil pump is abnormal, and then solved among the relevant art gearbox and needed the oil pump to provide lubrication and cooling, and when the electronic oil pump became invalid and can't provide lubrication and cooling, will influence hybrid vehicle's normal work's technical problem.

Alternatively, in step S26, the step of controlling the mechanical oil pump to cool and lubricate the transmission according to the operation state may include the steps of:

step S260, when the working state is TM independent driving, a neutral position instruction is sent to a gearbox controller, and an ISG motor is controlled to enter a rotating speed mode;

and step S261, in a rotating speed mode, determining a target rotating speed of the ISG motor according to the vehicle speed information and the oil temperature information of the gearbox, so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox, wherein the target rotating speed is in direct proportion to the vehicle speed information.

The electronic oil pump controller performs fault detection on the electronic oil pump controller. And when the failure of the electronic oil pump is detected, reporting fault information to the hybrid power controller. Thus, the hybrid controller enters a transmission electronic oil pump failure handling mode. The hybrid controller determines the current vehicle operating mode by the state of the various components, i.e., determines the driver torque request by input of an accelerator pedal, mode selection, etc.

If the electronic oil pump fails and the working state of the vehicle is TM independent driving, the hybrid controller sends a neutral gear (namely N gear) instruction to the gearbox controller and controls the ISG motor to enter a rotating speed mode. The hybrid controller obtains vehicle speed information from an anti-lock braking system (ABS) controller, and obtains the target rotating speed of the ISG motor through table lookup according to the vehicle speed information and oil temperature information of the gearbox. The ISG motor drives the mechanical oil pump through the input shaft of the electric gearbox, and lubrication and cooling are provided for the gearbox. The speed command to the ISG motor by the hybrid controller is related to the current vehicle speed, with higher speeds providing higher ISG speeds for adequate lubrication and cooling of the transmission.

Optionally, in step S26, the controlling the mechanical oil pump to cool and lubricate the transmission according to the operating state may further include:

step S262, in response to the torque request, comparing the driving capability of the TM with the required torque of the torque request;

step S263, when the required torque is determined to be smaller than the driving capability, the TM driving mode is still kept, and the ISG motor is controlled to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is determined to be larger than the driving capability, a driving gear instruction is sent to the gearbox controller, the ISG motor is controlled to be switched to a torque mode, and the torque instruction is output to the ISG motor so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

After entering the failure processing mode of the electronic oil pump of the transmission, the mode needs to be switched according to the input information of a driver or the change of the state of the vehicle.

If the electric automobile is driven by the TM alone at present, the ISG motor drives the mechanical oil pump to provide lubrication and cooling for the gearbox, and the TM driving mode is still kept when the torque required by a new driver is determined to be smaller than the TM driving capability; when the fact that the new torque required by the driver is larger than the TM driving capacity is determined, the hybrid power controller controls the gearbox to be switched to the D gear, controls the ISG motor to be switched to the torque mode, and outputs a torque instruction to the ISG motor to meet the driving requirement. At the moment, the ISG motor drives the mechanical oil pump to provide lubrication and cooling.

step S264, when the working state is one of four states of engine single drive, ISG motor drive, engine and ISG motor parallel drive and engine and ISG motor parallel power generation, a driving gear instruction is sent to the gearbox controller, and the ISG motor is controlled to enter a torque mode;

and step S265, in the torque mode, sending a torque output instruction to the ISG motor or the engine according to the pedal input information so as to control the ISG motor or the engine to drive the mechanical oil pump to cool and lubricate the gearbox.

If the electronic oil pump fails, the working state of the vehicle is one of the following states: the hybrid power controller sends a driving gear (namely, a D gear) instruction to the gearbox controller and controls the ISG motor to enter a torque mode. The hybrid controller provides a torque output command to the ISG motor or engine based on the driver's pedal input information. At the moment, the ISG motor or the engine drives the mechanical oil pump to provide lubrication and cooling for the gearbox.

step S266, when the working state is one of the two states of the engine and the ISG motor being driven in parallel and the engine and the ISG motor being driven in parallel to generate electricity, responding to the torque request, and adjusting the torque instructions of the engine and the ISG motor according to the change trend of the required torque of the torque request so as to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

If the engine and the ISG motor are driven in parallel or the engine and the ISG motor are used for generating power in parallel at present, the engine and the ISG motor drive the mechanical oil pump to provide lubrication and cooling for the gearbox. Upon determining that the new driver demand torque is increasing, the hybrid controller adjusts torque commands of the engine and the ISG motor, i.e., increases the output torque of the engine or decreases the power generation torque of the ISG motor. Upon determining that the new driver demand torque is decreasing, the hybrid controller adjusts torque commands of the engine and the ISG motor, i.e., decreases output torque of the engine and driving torque of the ISG motor. When the torque demand is determined to be extremely low, the hybrid controller is switched to a TM independent driving mode, the TM provides driving force, the ISG motor enters a rotating speed mode, the gearbox is set to be N-gear, and the ISG motor drives the mechanical oil pump to provide cooling and lubrication for the gearbox.

step S267, when the working state is ISG motor driving, responding to a torque request, and adjusting a torque instruction of the ISG motor according to a change trend of a required torque of the torque request so as to control the ISG motor to drive a mechanical oil pump to cool and lubricate a gearbox; or when the driving capability of the ISG motor cannot meet the required torque of the torque request, controlling the engine to start, and switching the working state into the state that the engine and the ISG motor are driven together to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

If the transmission is currently driven by the ISG motor, the ISG motor drives the mechanical oil pump to provide lubrication and cooling for the transmission. Upon determining that the new driver demand torque is increasing, the hybrid controller will adjust the torque command of the ISG motor, i.e., increase the driving torque of the ISG motor. If the electric drive capacity can not meet the torque requirement of a new driver, the hybrid controller controls the engine to start, then the engine and the ISG motor drive together, and meanwhile, the mechanical oil pump is driven to provide cooling and lubrication for the gearbox. When the torque demand is determined to be extremely low, the hybrid controller is switched to a TM independent driving mode, the TM provides driving force, the ISG motor enters a rotating speed mode, the gearbox is set to be an N gear, and the ISG motor drives the mechanical oil pump to provide cooling and lubrication for the gearbox.

step S268, when the working state is the driving of the engine, responding to the torque request, and adjusting the torque instruction of the engine according to the variation trend of the required torque of the torque request so as to control the engine to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

If currently in engine drive, a mechanical oil pump is driven by the engine to provide lubrication and cooling for the transmission. Upon determining that the new driver demand torque is increasing, the hybrid controller will adjust the torque command of the engine, i.e., increase the output torque of the engine. The engine drives the mechanical oil pump to provide cooling and lubrication for the gearbox. When the torque demand is determined to be extremely low, the hybrid controller is switched to a TM independent driving mode, the TM provides driving force, the ISG motor enters a rotating speed mode, the gearbox is set to be an N gear, and the ISG motor drives the mechanical oil pump to provide cooling and lubrication for the gearbox.

step S269, when the working state is a static state, controlling the ISG motor to be in a rotating speed mode;

and step S270, in the rotating speed mode, controlling the ISG motor to keep the lowest target rotating speed according to the oil temperature information of the gearbox, so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

If the electronic oil pump fails and the vehicle is in a static state, the hybrid controller controls the ISG motor to be in a rotating speed mode, and the target rotating speed of the ISG motor is obtained by looking up a table through oil temperature information and vehicle speed information of the gearbox. When the vehicle is static, the ISG motor needs to keep the lowest target rotating speed according to oil temperature information, and the ISG motor drives the mechanical oil pump to provide lubrication and cooling for the gearbox. That is, when the vehicle state is switched to the parking state, the hybrid controller controls the ISG motor to be in the rotating speed mode, and drives the mechanical oil pump to provide lubrication and cooling for the gearbox.

step S271, when the working state is a starting state, controlling the TM to execute a starting operation and controlling the ISG motor to be in a rotating speed mode;

and step S272, controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox in the rotating speed mode.

If the electronic oil pump fails and the vehicle is in a starting state, the hybrid controller controls the TM to execute a starting operation and simultaneously controls the ISG motor to be in a rotating speed mode to drive the mechanical oil pump to provide lubrication and cooling for the gearbox. That is, if the vehicle state is switched to the starting state, the hybrid controller will control the TM to perform the starting operation, and at the same time, the ISG motor is in the rotation speed mode, and drives the mechanical oil pump to provide lubrication and cooling for the transmission.

It should be noted that the foregoing method embodiments are described as a series of acts or combinations for simplicity in explanation, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts or acts described, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules illustrated are not necessarily required to practice the invention.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

According to an embodiment of the present invention, there is also provided an embodiment of a method for processing failure of an electronic oil pump of a power automobile, and fig. 3 is a block diagram of a structure of an electronic oil pump failure processing apparatus of a power automobile according to an embodiment of the present invention, which can be applied to a hybrid controller for performing a fault processing operation of electronic oil pump failure, as shown in fig. 3. By changing the working mode of the hybrid electric vehicle and coordinating other parts to provide lubrication, cooling and other modes for the gearbox, the vehicle still has the running capability. The device includes: the electronic oil pump control system comprises a receiving module 10, a fault notification module and a fault notification module, wherein the receiving module is used for receiving a fault notification message from an electronic oil pump controller, and the fault notification message is used for indicating that an electronic oil pump is in a failure state currently; the determining module 20 is used for determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message; and the processing module 30 is used for controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile in the failure processing mode of the electronic oil pump of the gearbox.

It should be noted that the receiving module 10, the determining module 20 and the processing module 30 correspond to steps S22 to S26 in the above method embodiment, and each module is the same as the corresponding step in the implementation example and application scenario, but is not limited to the disclosure in the above embodiment. It should be noted that the above module as a part of the device may be operated in the hybrid vehicle with the control system provided in the above embodiment.

Optionally, the processing module 30 comprises: a first processing unit (not shown in the figure) for sending a neutral command to the transmission controller and controlling the ISG motor to enter a rotation speed mode when the working state is TM independent driving; and under the rotating speed mode, determining the target rotating speed of the ISG motor according to the vehicle speed information and the oil temperature information of the gearbox so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox, wherein the target rotating speed is in direct proportion to the vehicle speed information.

Optionally, the processing module 30 further comprises: a comparison unit (not shown in the figure) for comparing the driving capability of the TM with the required torque of the torque request in response to the torque request; a second processing unit (not shown in the figure) for keeping the TM driving mode when it is determined that the required torque is smaller than the driving capability, and controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the transmission; or when the required torque is determined to be larger than the driving capability, a driving gear instruction is sent to the gearbox controller, the ISG motor is controlled to be switched to a torque mode, and the torque instruction is output to the ISG motor so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module 30 comprises: a third processing unit (not shown in the figure) for sending a driving gear instruction to the transmission controller and controlling the ISG motor to enter a torque mode when the working state is one of four states of engine single drive, ISG motor drive, engine and ISG motor parallel drive, and engine and ISG motor parallel power generation; and under the torque mode, a torque output instruction is sent to the ISG motor or the engine according to the pedal input information so as to control the ISG motor or the engine to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module 30 further comprises: a fourth processing unit (not shown in the figure), configured to, when the operating state is one of two states, that is, when the engine and the ISG motor are driven in parallel, and the engine and the ISG motor are used for generating power in parallel, adjust torque commands of the engine and the ISG motor according to a variation trend of a required torque of the torque request, so as to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the transmission; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module 30 further comprises: a fifth processing unit (not shown in the figure), configured to, when the operating state is ISG motor drive, adjust a torque instruction of the ISG motor according to a variation trend of a required torque of the torque request in response to the torque request, so as to control the ISG motor to drive the mechanical oil pump to perform cooling and lubricating processing on the transmission; or when the driving capability of the ISG motor cannot meet the required torque of the torque request, controlling the engine to start, and switching the working state into the state that the engine and the ISG motor are driven together to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module 30 further comprises: a sixth processing unit (not shown in the figure) for responding to the torque request when the working state is engine driving, and adjusting the torque instruction of the engine according to the variation trend of the required torque of the torque request so as to control the engine to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM to drive alone, a neutral command is sent to a gearbox controller, and the ISG motor is controlled to enter a rotating speed mode so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module 30 comprises: a seventh processing unit (not shown in the figure) for controlling the ISG motor to be in a rotation speed mode when the working state is a static state; and under the rotating speed mode, controlling the ISG motor to keep the lowest target rotating speed according to the oil temperature information of the gearbox, so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

Optionally, the processing module 30 comprises: an eighth processing unit (not shown in the figure) for controlling the TM to perform a starting operation and controlling the ISG motor to be in a rotating speed mode when the working state is a starting state; and under the rotating speed mode, controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A failure processing method for an electronic oil pump of a power automobile is characterized by comprising the following steps:

receiving a fault notification message from an electronic oil pump controller, wherein the fault notification message is used for indicating that the electronic oil pump is in a failure state currently;

determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message;

and under the failure processing mode of the electronic oil pump of the gearbox, controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile.

2. The method of claim 1, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition comprises:

when the working state is that the traction motor TM is driven independently, a neutral position instruction is sent to a gearbox controller, and the starter generator integrated ISG motor is controlled to enter a rotating speed mode;

and under the rotating speed mode, determining the target rotating speed of the ISG motor according to the vehicle speed information and the oil temperature information of the gearbox so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox, wherein the target rotating speed is in direct proportion to the vehicle speed information.

3. The method of claim 2, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition further comprises:

in response to a torque request, comparing a driveability of the TM to a demanded torque of the torque request;

when the required torque is determined to be smaller than the driving capability, the TM driving mode is still kept, and the ISG motor is controlled to drive the mechanical oil pump to cool and lubricate the gearbox; and when the required torque is determined to be larger than the driving capability, sending a driving gear instruction to the gearbox controller, controlling the ISG motor to be switched to a torque mode, and outputting a torque instruction to the ISG motor so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

4. The method of claim 1, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition comprises:

when the working state is one of four states of engine single drive, ISG motor drive, engine and ISG motor parallel drive and engine and ISG motor parallel power generation, a driving gear instruction is sent to a gearbox controller, and the ISG motor is controlled to enter a torque mode;

and under the torque mode, a torque output instruction is sent to the ISG motor or the engine according to pedal input information so as to control the ISG motor or the engine to drive the mechanical oil pump to cool and lubricate the gearbox.

5. The method of claim 4, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition further comprises:

when the working state is one of two states of parallel driving of an engine and an ISG motor and parallel power generation of the engine and the ISG motor, responding to a torque request, and adjusting torque instructions of the engine and the ISG motor according to a change trend of required torque of the torque request so as to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM independent drive, a neutral position instruction is sent to the gearbox controller, and the ISG motor is controlled to enter a rotating speed mode, so that the ISG motor is controlled to drive the mechanical oil pump to cool and lubricate the gearbox.

6. The method of claim 4, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition further comprises:

when the working state is ISG motor driving, responding to a torque request, and adjusting a torque instruction of the ISG motor according to a change trend of a required torque of the torque request so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the driving capability of the ISG motor cannot meet the required torque of the torque request, controlling the engine to start, and switching the working state into the state that the engine and the ISG motor are driven together to control the engine and the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM independent drive, a neutral position instruction is sent to the gearbox controller, and the ISG motor is controlled to enter a rotating speed mode, so that the ISG motor is controlled to drive the mechanical oil pump to cool and lubricate the gearbox.

7. The method of claim 4, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition further comprises:

when the working state is engine driving, responding to a torque request, and adjusting a torque instruction of the engine according to a change trend of a required torque of the torque request so as to control the engine to drive the mechanical oil pump to cool and lubricate the gearbox; or when the required torque is lower than a preset threshold value, the working state is switched to TM independent drive, a neutral position instruction is sent to the gearbox controller, and the ISG motor is controlled to enter a rotating speed mode, so that the ISG motor is controlled to drive the mechanical oil pump to cool and lubricate the gearbox.

8. The method of claim 1, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition comprises:

when the working state is a static state, controlling the ISG motor to be in a rotating speed mode;

and under the rotating speed mode, controlling the ISG motor to keep the lowest target rotating speed according to the oil temperature information of the gearbox so as to control the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

9. The method of claim 1, wherein controlling the mechanical oil pump to cool and lubricate the transmission in accordance with the operating condition comprises:

when the working state is a starting state, controlling the TM to execute a starting operation and controlling the ISG motor to be in a rotating speed mode;

and under the rotating speed mode, controlling the ISG motor to drive the mechanical oil pump to cool and lubricate the gearbox.

10. An electronic oil pump failure processing device of a power automobile is characterized by comprising:

the electronic oil pump control device comprises a receiving module, a control module and a control module, wherein the receiving module is used for receiving a fault notification message from an electronic oil pump controller, and the fault notification message is used for indicating that an electronic oil pump is in a failure state currently;

the determining module is used for determining to enter a failure processing mode of the electronic oil pump of the gearbox according to the fault notification message;

and the processing module is used for controlling the mechanical oil pump to cool and lubricate the gearbox according to the working state of the power automobile in the failure processing mode of the electronic oil pump of the gearbox.