A power management method for commercial vehicles

Abstract

The technical solution adopted by the present invention is as follows: A power management method for commercial vehicles, comprising the following steps: The central controller identifies the power usage scenarios according to the vehicle status; the power usage scenarios include the sleep state, the rest state, the entertainment state, and the working state; the central controller selects and activates the corresponding functions in the gateway system, the power system, the chassis system, the intelligent system, the body system, the information system, and the vehicle auxiliary control system according to the power usage scenarios and external input instructions, and drives the sub-controllers of the devices that execute the corresponding functions, so that the sub-controllers output corresponding control strategies for the devices that execute the corresponding functions. The present invention solves the problems of uncontrollable constant power, inconsistent ACC / ON output sources, and uncontrollable power under ACC / ON. This power management mode not only supports controllable constant power and ACC\ON, but also supports unified output signal sources.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic and electrical technologies, and particularly relates to a power management method for commercial vehicles. Background Art

[0002] The effective and reasonable use of power is a basic condition for the operation of commercial vehicles. There are several power supply states for commercial vehicles: constant power, controlled power, ON gear power, and ACC gear. Currently, the power management method for commercial vehicles is as follows: constant power cannot be controlled, controlled power is controlled by the main power switch, and ON and ACC power are uniformly controlled by the ignition lock, BCM, gateway, and PEPS.

[0003] The previous power management method for commercial vehicles was that constant power could not be controlled, and there were disadvantages: some electrical controllers using constant power needed to save data with some delayed power-off, but continuously supplying constant power to these controllers would cause power loss and an increase in static current, resulting in battery power depletion; ON and ACC power were uniformly controlled by the ignition lock, BCM, gateway, or PEPS; there were disadvantages: 1. The signal sources were not unified. For example, ACC and ON could be output by multiple controllers, resulting in non-uniform components; 2. With the above control to output ON and ACC power, individual controller control could not be achieved. For example, in the ON gear state, as long as some controllers were working, not all ON gear power controllers needed to work; 3. In the ON and ACC gears, if no one turned off ON or ACC, ON and ACC could not be controlled, resulting in all controllers working, causing battery power depletion and the vehicle being unable to start. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the above background art, provide a power management method for commercial vehicles, and solve the problems of uncontrollable constant power, non-uniform ACC / ON output sources, and uncontrollable power under ACC / ON. This power management mode not only supports controllable constant power, ACC, and ON, but also supports unified output signal sources.

[0005] The technical solution adopted by the present invention is: a power management method for commercial vehicles, including the following steps:

[0006] The central controller identifies the power usage scenario according to the vehicle state; the power usage scenarios include the sleep state, rest state, entertainment state, and working state;

[0007] The central controller selects and activates the corresponding functions in the gateway system, powertrain system, chassis system, intelligent system, body system, information system, and vehicle auxiliary control system according to the power usage scenario and external input instructions, and drives the sub-controllers of the devices that execute the corresponding functions, so that the sub-controllers output the corresponding control strategies and power management strategies for the devices that execute the corresponding functions;

[0008] The system controllers of the gateway system, power system, chassis system, intelligent system, body system, information system and vehicle auxiliary control system respectively switch the network status of each sub-controller in its domain network according to the communication needs fed back by each sub-controller in its domain network; the network status includes: normal operating status, pre-sleep status and sleep status; when the network status of the sub-controller is in normal operating status, it exchanges messages with the system control of its domain network at a set frequency; when the network status of the sub-controller is in pre-sleep status or sleep status, it stops exchanging messages with the system control of its domain network.

[0009] In the above technical solution, when the central controller determines that the main switch of the vehicle is turned on, the vehicle is in the power-on state and the user has no other operations, the central controller determines that the power usage scenario is in the sleep state; then the central controller starts the TBOX data upload function, battery performance detection function, door unlocking / locking function, window lifting function, sunroof opening and closing function, vehicle power distribution function, accompany me home function, fuel anti-theft function and remote control function.

[0010] In the above technical scheme, when the central controller determines that the main switch of the vehicle is turned off and the vehicle is in an unpowered state, the central controller determines that the power usage scenario is a resting state; then the central controller starts the TBOX data upload function, battery performance detection function, door unlocking / locking function, window lifting function, sunroof opening and closing function, vehicle power distribution function, accompany me home function, fuel anti-theft function, parking heater / parking air conditioning function, interior lighting function, outdoor lighting function, power management function, post-processing purge function, controller power-off data storage function and remote control function.

[0011] In the above technical solution, when the central controller determines that the vehicle main switch is turned on, the vehicle is in the power-on state, the ignition lock is in the ACC gear or the ON gear and the vehicle is not started, the central controller determines that the power usage scenario is the entertainment state; then the central controller starts the TBOX data upload function, the battery performance detection function, the door unlocking / locking function, the window lifting function, the vehicle power distribution function, the parking heater / parking air conditioning function, the interior lighting function, the exterior lighting function, the power management function, the post-processing purge function, the controller power-off data storage function, the wiper / washing function and the audio and video entertainment function.

[0012] In the above technical solution, when the central controller determines that the vehicle is started, the central controller determines that the power usage scenario is in a working state; then the central controller controls the normal functions of the gateway system, power system, chassis system, intelligent system, body system, information system and vehicle auxiliary control system, and starts the power management function.

[0013] In the above technical solution, the control instructions of the ACC gear and the ON gear are output only by the integrated dynamic braking module.

[0014] In the above technical solution, when the power supply scenario is in the rest, sleep or entertainment state, the central controller sets the power supply always-on disconnection time; the vehicle body system controller continuously detects the battery; when the vehicle body system controller determines that the battery voltage is lower than the calibrated value or the engine still has not started after the timing exceeds the set value, the vehicle body system controller sends a control command to the integrated dynamic braking module, and the integrated dynamic braking module drives the ACC and ON gears to disconnect.

[0015] In the above technical solution, the network state switching process of any sub-controller is as follows: when the sub-controller is in the normal operation state, if no communication requirement from the system controller corresponding to the domain network where the sub-controller is located is received within the set time period or a sleep instruction is received, it switches to the pre-sleep state; when the sub-controller is in the pre-sleep state or the sleep state, if a communication requirement from the system controller corresponding to the domain network where the sub-controller is located is received, it switches to the pre-sleep state; when the sub-controller is in the pre-sleep state, if no communication requirement from the system controller corresponding to the domain network where the sub-controller is located is received within the set waiting time, it switches to the sleep state.

[0016] In the above technical solution, for the domain network of the vehicle body system and the domain network of the information system, the vehicle body system controller is the main node to control the network state switching.

[0017] In the above technical solution, for the domain network of the powertrain system, the powertrain system controller or the power system controller is the main node to control the network state switching; for the domain networks of the gateway system, the chassis system, the intelligent system and the vehicle auxiliary control system, the ignition lock switch ACC / ON gear signal or other hard-wired enable signals are used as communication requirements to control the network state switching.

[0018] The beneficial effects of the present invention are as follows: according to different power supply usage scenarios, the present invention defines the vehicle's power consumption requirements, overall defines the power consumption requirements and allocation schemes of multiple controllers, and uses the IDB to control the always-on power, ACC gear and ON gear. According to the vehicle's functional characteristic requirements, function allocation and power supply configuration scheme, based on network management, the present invention configures and manages the in-vehicle network-related ECUs and coordinates their work, enabling each ECU to sleep and wake up orderly, achieving the purpose of reducing the vehicle's static power consumption to the lowest level.

[0019] Furthermore, the present invention can manage the always-on power devices in the rest mode. In the absence of operations, the static current is reduced to the lowest level, extending the service life of the battery.

[0020] Furthermore, in the sleep mode, the main power switch of the present invention is turned on, and the controlled power devices are ready for work. Without external drive, power management can be performed to reduce the power consumption of the battery.

[0021] Further, when the present invention is in the ACC / ON state in the entertainment mode, most of the electrical devices are working, and the BDCU will detect the time. When a certain time is reached, it will automatically turn off the ON / ACC to avoid the battery from discharging.

[0022] Further, in the working mode of the present invention, the vehicle is used normally without power restrictions, ensuring the normal operation of the vehicle.

[0023] Further, the network switching method adopted by the present invention can avoid the power consumption of electrical devices caused by long-term network wake-up; in this network mode, when there is no wake-up source to wake up, the controller can perform pre-sleep and then enter the sleep state.

[0024] Further, the present invention uses the domain controller as the main node, which can be used as a judgment for network wake-up, can wake up the controllers of a single network segment to work, and can also be used as a layer of firewall for functional safety.

[0025] Further, the present invention reasonably plans the use of the battery power, ensures that each controller can work effectively, and can also extend the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the process steps of the present invention;

[0027] Figure 2 It is a schematic diagram of the process logic of the present invention;

[0028] Figure 3 It is a schematic diagram of the policy logic of the present invention;

[0029] Figure 4 It is a logic diagram of the network state switching of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] The following further describes the present invention in detail with reference to the drawings and specific embodiments, which is convenient for clearly understanding the present invention, but they do not limit the present invention.

[0031] As Figure 1 shown, the present invention provides a power management method for commercial vehicles, including the following steps:

[0032] The central controller identifies the power usage scenarios according to the vehicle state; the power usage scenarios include the sleep state, the rest state, the entertainment state, and the working state;

[0033] The central controller selects and starts corresponding functions in the gateway system, power system, chassis system, intelligent system, body system, information system and vehicle auxiliary control system according to the power usage scenario and external input instructions, and drives the sub-controllers of the devices that perform the corresponding functions, so that the sub-controllers output corresponding control strategies and power management strategies for the devices that perform the corresponding functions;

[0034] The system controllers of the gateway system, power system, chassis system, intelligent system, body system, information system and vehicle auxiliary control system respectively switch the network status of each sub-controller in its domain network according to the communication needs fed back by each sub-controller in its domain network; the network status includes: normal operating status, pre-sleep status and sleep status; when the network status of the sub-controller is in normal operating status, it exchanges messages with the system control of its domain network at a set frequency; when the network status of the sub-controller is in pre-sleep status or sleep status, it stops exchanging messages with the system control of its domain network.

[0035] like Figure 2 As shown, the present invention defines different power application scenarios based on different vehicle states, and then defines the power usage functions of the whole vehicle in different scenarios. Based on the power usage functions in different scenarios, the power strategies of each sub-controller are defined, and the power-on and power-off, sleep / wake-up strategies of each controller are defined. The interface type of each controller is defined according to the function. The generated control strategy is as follows: Figure 3 shown.

[0036] The present invention determines the power application scenario of the vehicle according to the vehicle state and starts the corresponding function. Then, according to the operation instruction input by the user, the corresponding function is executed according to the preset power strategy.

[0037] Specifically, when the central controller determines that the vehicle's main switch is on, the vehicle is powered on and the user has no other operations, the central controller determines that the power usage scenario is in a sleep state; then the central controller starts the TBOX data upload function, battery performance detection function, door unlocking / locking function, window lifting function, sunroof opening and closing function, vehicle power distribution function, accompany me home function, fuel anti-theft function and remote control function.

[0038] For the execution process of the TBOX data upload function (GPS / battery / locking the car) in the dormant state, the power management strategy adopted is: TBOX is dormant, heartbeats once every 10 minutes, and positioning is performed once every 1 hour; the battery voltage can be determined by the TBOX itself, and other information needs to cross network segments and increase the power consumption of the TBOX.

[0039] For the execution process of the battery performance detection function in the dormant state, the power management strategy adopted is: the IBS monitors the battery information; the BDCU receives the IBS information and transmits it to the TBOX through the gateway.

[0040] For the execution process of the door unlocking / locking function in the sleep state, the adopted wake-up source management strategy is as follows: The BDCU receives the wireless key signal or touches the door handle switch; the BDCU directly notifies the DCM to unlock / lock, and the CIOM synchronously lights up the turn signal; the BDCU notifies the IDB to drive the horn, and when locking the car with one key, the DCM drives the window to rise; by default, the light is on and the horn does not sound, and the horn can be set to be turned on in the large screen (newly added). The number of wake-up sources is reduced, and the probability of multiple controllers being accidentally woken up is decreased. Currently, this position is uniformly connected to the BDCU, and after being judged by the BDCU, it is sent to each controller for execution.

[0041] For the execution process of the window lifting - remote control function in the sleep state, the adopted power management strategy is as follows: Cooperate with the DCM to drive the window to lift when locking the car with one key; when remotely controlling, drive the window through the TBOX - gateway - DCM.

[0042] For the execution process of the sunroof opening / closing - remote control function in the sleep state, the adopted power management strategy is as follows: Cooperate with the IDB to drive the sunroof to close when locking the car with one key; when remotely controlling, drive the sunroof through the TBOX - gateway - IDB.

[0043] For the execution process of the vehicle power distribution function in the sleep state, the adopted power management strategy is as follows: Provide power to the constant - power components without control; supply power to the horn according to the BDCU instruction and fuel anti - theft; supply power to the sunroof, air conditioner, etc. when remotely controlling; when the main switch is disconnected, delay the power - off for the after - treatment, sunroof, each controller, etc.

[0044] For the execution process of the follow - me - home function in the sleep state, the adopted power management strategy is as follows: Trigger the follow - me - home function through the SWIO headlight passing gear, the steering wheel switch sends an instruction to the BDCU, and notifies the CIOM to turn on the low beam; the low beam of the CIOM is at the constant - power port and is powered off after a certain delay; the large screen can set the mode and delay time; distinguish between day and night through the sunlight sensor, and the light can only be on at night.

[0045] For the execution process of the fuel anti - theft function in the sleep state, the adopted power management strategy is as follows: Turn on the fuel anti - theft switch, and the fuel anti - theft system starts to work; when triggering an alarm, the IDB drives the horn to alarm, the CIOM lights up the light for alarm, and at the same time, the BCAN transfers through the gateway to the TBOX to upload information; when alarming, notify the IDB to supply power to the IDCU and turn on the surround view image recording.

[0046] For the execution process of the remote control function in the sleep state, the adopted power management strategy is as follows: The remote APP sends instructions to the vehicle through the TBOX to power on the door lock, window, air conditioner / heater, headlight, horn, and electromagnetic main power switch.

[0047] Specifically, when the central controller determines that the vehicle main switch is off and the vehicle is in a non-powered state, the central controller determines that the power usage scenario is the rest state; furthermore, the central controller activates the TBOX data upload function, battery performance detection function, door unlock / lock function, window lift function, sunroof opening / closing function, vehicle power distribution function, follow-me-home function, fuel anti-theft function, parking heater / parking air conditioner function, interior lighting function, exterior lighting function, power management function, post-treatment purge function, controller power-off data saving function, and remote control function.

[0048] For the execution process of the TBOX data upload function (GPS / battery / lock) in the rest state, the power management strategy adopted is: TBOX goes into sleep mode, with a heartbeat every 10 minutes and a positioning every 1 hour; the battery voltage can be judged by the TBOX itself, and other information requires cross-network segments and increases the power consumption of the TBOX.

[0049] For the execution process of the battery performance detection function in the rest state, the power management strategy adopted is: the IBS monitors the battery information; the BDCU receives the IBS information and transmits it to the TBOX through the gateway.

[0050] For the execution process of the door unlock / lock function in the rest state, the power management strategy adopted is: the BDCU receives the wireless key signal or touches the door handle switch or the central control switch operation; the BDCU directly notifies the DCM to unlock / lock, and the CIOM synchronously lights up the turn signal; the BDCU notifies the IDB to drive the horn; by default, the light is on and the horn does not sound, and the horn can be set to be turned on in the large screen.

[0051] For the execution process of the window lift function in the rest state, the power management strategy adopted is: cooperate with the DCM to drive the window lift when locking the car with one key, or lift the window by pressing the window switch; when remotely controlled, drive the window through the TBOX-gateway-DCM.

[0052] For the execution process of the sunroof opening / closing - remote control function in the rest state, the power management strategy adopted is: cooperate with the IDB to drive the sunroof to close when locking the car with one key; when remotely controlled, drive the sunroof through the TBOX-gateway-IDB; when resting in the car, manually control the sunroof to open / close.

[0053] For the execution process of the vehicle power distribution function in the rest state, the power management strategy adopted is: provide power to the constant power components without control; supply power to the horn according to the BDCU instruction and fuel anti-theft; supply power to the sunroof, air conditioner, etc. when remotely controlled; when the main switch is disconnected, delay the power-off for the post-treatment, sunroof, each controller, etc.; the sleeper switch, steering wheel switch, 24V socket, and electric sunshade are powered and available.

[0054] For the execution process of the "Follow Me Home" function in the rest state, the adopted power management strategy is as follows: The "Follow Me Home" function is triggered through the SWIO headlight passing gear. The steering wheel switch sends a command to the BDCU to notify the CIOM to turn on the low beam. The low beam of the CIOM is at the constant power port and is powered off after a certain delay. The large screen can set the mode and delay time.

[0055] For the execution process of the fuel anti-theft function in the rest state, the adopted power management strategy is as follows: Turn on the fuel anti-theft switch, and the fuel anti-theft system starts to work. When an alarm is triggered, the IDB drives the horn to alarm, the CIOM lights up for alarm, and at the same time, the BCAN transfers the gateway to send the information uploaded by the TBOX.

[0056] For the execution process of the parked vehicle heating / parked vehicle air conditioning function in the rest state, the adopted power management strategy is as follows: Turn on the parked vehicle heating / parked vehicle air conditioning switch to start the air conditioning system. The IDB provides controlled power for the heating to the air conditioner. The parked vehicle air conditioner will stop working automatically when it detects that the voltage is too low.

[0057] For the execution process of the interior lights (ceiling light / sleeper light / read light) function in the rest state, the adopted power management strategy is as follows: The interior lights are supplied with controlled power by the IDB; the lights can be manually controlled.

[0058] For the execution process of the exterior lights (headlight / sidelight / rear and front fog lights / turn signal) function in the rest state, the adopted power management strategy is as follows: The exterior lights are powered by the CIOM, directly taken from the chassis distribution box; the light knob is connected to the LDCM and is supplied with constant power by the IDB; the combination switch SWIO is supplied with controlled power by the IDB; the BDCU is responsible for control.

[0059] For the execution process of the power management function (low voltage reminder / energy-saving mode) in the rest state, the adopted power management strategy is as follows: When the vehicle has no action for a long time, the BDCU sends an energy-saving command to each controller; when the vehicle voltage is too low, the BDCU notifies the TBOX to send a low voltage message to the APP.

[0060] For the execution process of the aftertreatment purge function in the rest state, the adopted power management strategy is as follows: The aftertreatment continues to complete the purge work until the end.

[0061] For the execution process of the controller power-off data saving function in the rest state, the adopted power management strategy is as follows: The controllers activated in the ACC gear complete the power-off data saving, and the controllers activated in the ON gear continue to complete the data saving.

[0062] For the execution process of the remote control function in the rest state, the adopted power management strategy is as follows: The remote APP sends instructions to the vehicle through the TBOX to power on the door lock, window, air conditioner / heater, headlight, horn, and electromagnetic main power switch; after receiving the instructions, the IDB temporarily works for a period of time and then enters the energy-saving mode again. The energy-saving mode is mainly applied to the rest, sleep, and entertainment states.

[0063] Specifically, when the central controller determines that the vehicle main switch is turned on, the vehicle is in the powered-on state, the ignition lock is in the ACC or ON gear and the vehicle is not started, the central controller determines that the power usage scenario is the entertainment state; furthermore, the central controller activates the TBOX data upload function, battery performance detection function, door unlock / lock function, window lifting function, vehicle power distribution function, parking heater / parking air conditioner function, interior lighting function, exterior lighting function, power management function, post-treatment purge function, controller power-off data saving function, wiper / wash function, and audio-visual entertainment function.

[0064] For the execution process of the TBOX data upload function (GPS / battery / lock) in the entertainment state, the adopted power management strategy is as follows: The TBOX goes into sleep mode, with a heartbeat every 10 minutes and a location update every 1 hour; the battery voltage can be judged by the TBOX itself, and other information requires crossing network segments and increases the power consumption of the TBOX.

[0065] For the execution process of the battery performance detection function in the entertainment state, the adopted power management strategy is as follows: The IBS monitors the battery information; the BDCU receives the IBS information and transmits it to the TBOX through the gateway.

[0066] For the execution process of the door unlock / lock function in the entertainment state, the adopted power management strategy is as follows: The BDCU receives the wireless key signal or touches the door handle switch or operates the central control switch; the BDCU directly notifies the DCM to unlock / lock, and the CIOM synchronously lights up the turn signal; the BDCU notifies the IDB to drive the horn; by default, the light is on and the horn does not sound, and the horn can be set to be turned on in the large screen.

[0067] For the execution process of the window lifting function in the entertainment state, the adopted power management strategy is as follows: When locking the car with one key, the DCM drives the window to lift or lower, or the window is lifted or lowered by pressing the window switch; during remote control, the window is driven through the TBOX - gateway - DCM.

[0068] For the execution process of the vehicle power distribution function in the entertainment state, the adopted power management strategy is as follows: Provide power to the constant power components without control; supply power to the horn according to the BDCU instruction and fuel anti-theft; supply power to the sunroof, air conditioner, etc. during remote control; the sleeper switch, steering wheel switch, 24V socket, and electric sunshade are powered and available.

[0069] For the execution process of the parking warm air / parking air conditioning function in the entertainment state, the adopted power management strategy is as follows: The air conditioning panel is powered on in the ACC gear. Since the engine is not started, the compressor cannot work, and only the blower can work.

[0070] For the execution process of the interior lighting (ceiling light / bunk light / reading light) function in the entertainment state, the adopted power management strategy is as follows: The interior lighting is supplied with controlled power by the IDB; the lights can be manually controlled.

[0071] For the execution process of the exterior lighting (headlights / sidelights / rear and front fog lights / turn signals) function in the entertainment state, the adopted power management strategy is as follows: The exterior lighting is powered by the CIOM, directly taken from the chassis distribution box; the lighting knob is connected to the LDCM and supplied with constant power by the IDB; the combination switch SWIO is supplied with controlled power by the IDB; the BDCU is responsible for control.

[0072] For the execution process of the power management function (low voltage reminder / energy saving mode) in the entertainment state, the adopted power management strategy is as follows: When the vehicle has no action for a long time, the BDCU sends an energy saving instruction to each controller; when the vehicle voltage is too low, the BDCU notifies the TBOX to send a low voltage message to the APP.

[0073] For the execution process of the controller power-off data saving function in the entertainment state, the adopted power management strategy is as follows: The controllers activated in the ON gear start data saving until completion.

[0074] For the execution process of the wiper / washing function in the entertainment state, the adopted power management strategy is as follows: The wiper and washing are supplied with the main controlled power by the IDB; they can only work in the ACC gear controlled by the IDB; the combination switch SWIO is supplied with controlled power to provide wiper and washing instructions.

[0075] For the execution process of the audio-visual entertainment function in the entertainment state, the adopted power management strategy is as follows: The radio and the large screen can start working in the ACC gear; the large screen has a built-in function corresponding controller.

[0076] Specifically, when the central controller determines that the vehicle is started, the central controller determines that the power usage scenario is the working state; furthermore, the central controller controls the normal functions of the gateway system, power system, chassis system, intelligent system, body system, information system, and vehicle auxiliary control system, and activates the power management function.

[0077] For the execution process of the power management function (low voltage reminder / energy saving mode) in the working state, the adopted power management strategy is as follows: When the engine is not running and the vehicle has no action for a long time, the BDCU sends an energy saving instruction to each controller; when the vehicle voltage is too low, the BDCU notifies the TBOX to send a low voltage message to the APP.

[0078] Specifically, the control commands for the ACC gear and the ON gear are only output by the integrated dynamic braking module. That is, all ON / ACC are uniformly output by the IDB, and the output source is uniformly the IDB.

[0079] Specifically, the execution process of the energy-saving mode is as follows: Set the power-off time of the constant power supply; the vehicle body system controller continuously detects the battery; when the vehicle body system controller determines that the battery voltage is lower than the calibrated value or the engine still has not started after the timing exceeds the set value, the vehicle body system controller sends a control command to the integrated dynamic braking module, and the integrated dynamic braking module drives the ACC and ON gears to disconnect.

[0080] Preferably, the longest time required to work for a period of time in the constant power mode (such as the delayed purge of the aftertreatment controller) is used to set the power-off time of the constant power supply. In the ACC and ON gears, the BDCU detects the battery voltage and performs timing. When the battery voltage is lower than 23.5V (calibratable) or the timing reaches 30 minutes (the engine has not started), the BDCU sends a command to the IDB to disconnect the ACC and ON gears.

[0081] Specifically, as Figure 4 shown, the network state switching process of any sub-controller is as follows: When the sub-controller is in the normal operation state, if no communication requirement from the system controller corresponding to the domain network where the sub-controller is located is received within the set time period or a sleep instruction is received, it switches to the pre-sleep state; when the sub-controller is in the pre-sleep state or the sleep state, if a communication requirement from the system controller corresponding to the domain network where the sub-controller is located is received, it switches to the pre-sleep state; when the sub-controller is in the pre-sleep state, if no communication requirement from the system controller corresponding to the domain network where the sub-controller is located is received within the set waiting time, it switches to the sleep state.

[0082] Specifically, for the domain network of the vehicle body system and the domain network of the information system, the vehicle body system controller is the main node for network state switching control. For the power system domain network, the power system controller or the power system controller is the main node for network state switching control; for the domain networks of the gateway system, the chassis system, the intelligent system, and the vehicle auxiliary control system, the ignition lock switch ACC / ON gear signal or other hard-wired enable signals are used for network state switching control.

[0083] Preferably, the vehicle body domain and the information domain network (including CGW / VDCU, IDCU) are network-managed by the BDCU as the main node. Each ECU participating in network management comprehensively judges based on the status of the periodic network management message instructions broadcast by the BDCU received and the status of the ECU requesting the network to complete the conversion of its own network state and implement corresponding network behaviors.

[0084] The power domain network (including the new energy network) is network - managed by the PDCU / EVECU as the main node, which is responsible for the wake - up and sleep management of relevant control systems.

[0085] Other ECUs in the network control their own network wake - up and sleep only through the ignition switch ACC / ON gear signal or other hard - wire enable signals.

[0086] Table 1 shows the ECU network status definitions, status transition relationships, and message sending and receiving requirements.

[0087] Table 1 Network Status Requirements Table

[0088]

[0089] Among them, under normal operating conditions: network management messages and application messages can be sent normally. In the pre - sleep state: when there is no wake - up, the controller cannot send messages and cannot receive messages either, and this state is the same as the sleep mode.

[0090] Network management messages refer to messages for managing the entire network segment, usually specific messages;

[0091] Conventional application messages generally refer to messages for normal network operation, non - specific messages, which are messages for normal transmission;

[0092] Diagnostic messages refer to special messages used during controller diagnosis;

[0093] Calibration messages refer to special messages used during controller calibration.

[0094] The content not described in detail in this specification belongs to the prior art well - known to those skilled in the art.

Claims

1. A power management method for commercial vehicles, characterized in that: It includes the following steps: The central controller identifies the power usage scenarios according to the vehicle status; the power usage scenarios include the sleep state, rest state, entertainment state, and working state; The central controller selects and activates the corresponding functions in the gateway system, powertrain system, chassis system, intelligent system, body system, information system, and vehicle auxiliary control system according to the power usage scenario and external input instructions, and drives the sub-controllers of the devices that execute the corresponding functions, so that the sub-controllers output the corresponding control strategies and power management strategies for the devices that execute the corresponding functions; The system controllers of the gateway system, powertrain system, chassis system, intelligent system, body system, information system, and vehicle auxiliary control system respectively switch the network status of each sub-controller within their domain network according to the communication requirements fed back by each sub-controller within their domain network; The network status includes: normal operation state, pre-sleep state, and sleep state; when the network status of the sub-controller is in the normal operation state, it exchanges messages with the system control of its domain network at a set frequency; when the network status of the sub-controller is in the pre-sleep state or sleep state, it stops exchanging messages with the system control of its domain network; When the central controller determines that the vehicle main switch is turned on, the vehicle is in the powered-on state, the ignition lock is in the ACC gear or ON gear and the vehicle is not started, the central controller determines that the power usage scenario is the entertainment state; furthermore, the central controller activates the TBOX data upload function, battery performance detection function, door unlock / lock function, window lift function, vehicle power distribution function, parking heating / parking air conditioning function, interior lighting function, exterior lighting function, power management function, post-treatment purge function, controller power-down data saving function, wiper / wash function, and audio-visual entertainment function; The control instructions for the ACC gear and ON gear are only output by the integrated dynamic braking module.

2. The commercial vehicle power management method according to claim 1, wherein: When the central controller determines that the vehicle main switch is turned on, the vehicle is in the powered-on state and the user has no other operations, the central controller determines that the power usage scenario is the sleep state; furthermore, the central controller activates the TBOX data upload function, battery performance detection function, door unlock / lock function, window lift function, sunroof opening / closing function, vehicle power distribution function, follow-me-home function, fuel anti-theft function, and remote control function.

3. The commercial vehicle power management method according to claim 1, characterized in that: When the central controller determines that the vehicle main switch is turned off and the vehicle is in the non-powered-on state, the central controller determines that the power usage scenario is the rest state; furthermore, the central controller activates the TBOX data upload function, battery performance detection function, door unlock / lock function, window lift function, sunroof opening / closing function, vehicle power distribution function, follow-me-home function, fuel anti-theft function, parking heating / parking air conditioning function, interior lighting function, exterior lighting function, power management function, post-treatment purge function, controller power-down data saving function, and remote control function.

4. The commercial vehicle power management method according to claim 1, wherein: When the central controller determines that the vehicle starts, the central controller determines that the power usage scenario is the working state; furthermore, the central controller controls the normal functions of the gateway system, power system, chassis system, intelligent system, body system, information system, and vehicle auxiliary control system, and activates the power management function.

5. The commercial vehicle power management method according to claim 1, characterized in that: When the power scenario is in the rest, sleep, or entertainment state, set the normal power-off time; the body system controller continuously detects the battery voltage; when the body system controller determines that the battery voltage is lower than the calibrated value or the engine still has not started after the timing exceeds the set value, the body system controller sends a control command to the integrated dynamic braking module, and the integrated dynamic braking module drives the ACC and ON gears to disconnect.

6. The commercial vehicle power management method according to claim 1, wherein: The network state switching process of any sub-controller is as follows: when the sub-controller is in the normal operation state, if no communication requirements from the system controller corresponding to the domain network where the sub-controller is located are received within the set time period or a sleep instruction is received, it switches to the pre-sleep state; when the sub-controller is in the pre-sleep state or sleep state, if communication requirements from the system controller corresponding to the domain network where the sub-controller is located are received, it switches to the normal operation state; when the sub-controller is in the pre-sleep state, if no communication requirements from the system controller corresponding to the domain network where the sub-controller is located are received within the set waiting time, it switches to the sleep state.

7. The commercial vehicle power management method according to claim 1, characterized in that: For the domain network of the body system and the domain network of the information system, the body system controller is the main node for controlling the network state switching.

8. The commercial vehicle power management method according to claim 7, wherein: For the domain network of the power system, the power system controller or the power system controller is the main node for controlling the network state switching; for the domain networks of the gateway system, chassis system, intelligent system, and vehicle auxiliary control system, the network state switching is controlled by the ignition lock switch ACC / ON gear signal or other hardwired enable signals.

Images