An IG2 power supply automatic control method and system based on vehicle working status

Abstract

The present invention discloses an automatic control method and system for an IG2 power supply based on the vehicle's operating status. The method includes a body controller detecting whether an IG1 power supply signal is received. If so, the body controller controls the connection status of the IG2 power supply relay and the power supply based on the collected vehicle operating status. If not, the IG2 power supply relay disconnects several electrical appliances from the power supply. The present invention implements an automatic control method for the IG2 power supply (power supply for electrical appliances such as dryers and air conditioners) of a commercial vehicle by monitoring the vehicle's operating status (IG1 power supply signal, engine speed / READY status, low-voltage battery voltage). This method not only simplifies the structure of the ignition lock, but also increases the starting stability of the vehicle, realizes undervoltage protection, and extends the service life of the low-voltage battery. At the same time, it avoids the driving safety hazards caused by the driver shutting down the running electrical appliances due to undervoltage of the low-voltage battery during driving.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile electrical control, and in particular to an IG2 power automatic control method and system based on the working state of a vehicle. Background Art

[0002] Currently, commercial vehicles often use IG2 power supplies for vehicle power control. Traditional IG2 power supply control has the following drawbacks: 1. The ignition lock structure is complex; 2. Electrical appliances are directly connected to the low-voltage battery, making it impossible to disconnect them during vehicle startup. All energy is used for starting, increasing the risk of startup failure; 3. When the low-voltage battery is undervoltage, the IG2 power supply to electrical appliances cannot be automatically disconnected, seriously shortening the low-voltage battery's service life. If this occurs during driving, the driver's attempt to shut down the active electrical appliances could significantly impact driving safety. Summary of the Invention

[0003] The main purpose of the present invention is to provide an IG2 power automatic control method and system based on the vehicle working status, aiming to solve the technical problems of the current IG2 power control having a complex ignition lock structure, the risk of starting failure, and affecting the service life of the low-voltage battery.

[0004] To achieve the above object, the present invention provides an IG2 power automatic control method based on the vehicle operating state, the method comprising the following steps:

[0005] The body controller detects whether it receives the IG1 power signal;

[0006] If so, the body controller controls the connection state between the IG2 power relay and the power supply according to the collected vehicle working state;

[0007] If not, the IG2 power relay disconnects several electrical consumers from the power supply.

[0008] Optionally, the vehicle operating status includes the IG2 power control switch, speed, READY signal, low-voltage battery voltage and start signal.

[0009] Optionally, the body controller controls the connection state of the IG2 power relay and the power supply according to the collected vehicle working state, specifically including:

[0010] When the IG2 power control switch is off, the body controller controls the IG2 power relay to close, providing power to several electrical appliances;

[0011] When the IG2 power control switch is closed, the body controller controls the connection status between the IG2 power relay and the power supply according to the speed, READY signal, low-voltage battery voltage and start signal.

[0012] Optionally, the vehicle body controller controls the connection state of the IG2 power relay and the power supply according to the rotational speed, the READY signal, the low-voltage battery voltage, and the start signal, specifically including:

[0013] When the start signal is valid, the body controller controls the IG2 power relay to disconnect;

[0014] When the speed is greater than a first preset speed, the READY signal is in the READY state, and the low-voltage battery voltage is less than a first preset voltage value, the body controller controls the IG2 power relay to be disconnected;

[0015] When the speed is less than a second preset speed, the READY signal is in a non-READY state, and the low-voltage battery voltage is less than a second preset voltage value, the body controller controls the IG2 power relay to be disconnected;

[0016] Otherwise, the body controller controls the IG2 power relay to close.

[0017] Optionally, the first preset speed is 350 rpm; when the vehicle is a 24V model, the first preset voltage value is 22V; when the vehicle is a 12V model, the first preset voltage value is 10V.

[0018] Optionally, the second preset speed is 200 rpm; when the vehicle is a 24V model, the first preset voltage value is 23V; when the vehicle is a 12V model, the first preset voltage value is 11V.

[0019] Optionally, the vehicle body controller collects the vehicle operating status via the CAN bus.

[0020] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an IG2 power supply automatic control system based on the vehicle working status, wherein the IG2 power supply automatic control system based on the vehicle working status includes a body controller, an IG2 power supply relay and several electrical appliances connected in sequence, wherein the body controller collects the vehicle working status, and the IG2 power supply automatic control system based on the vehicle working status executes the IG2 power supply automatic control method based on the vehicle working status as described above.

[0021] An embodiment of the present invention proposes a method and system for automatically controlling an IG2 power supply based on the vehicle's operating status. The method includes a vehicle body controller detecting whether an IG1 power signal is received. If so, the vehicle body controller controls the connection status of the IG2 power relay and the power supply based on the collected vehicle operating status. If not, the IG2 power relay disconnects several electrical appliances from the power supply. The present invention implements a method for automatically controlling the IG2 power supply (power supply for electrical appliances such as dryers and air conditioners) of a commercial vehicle by monitoring the vehicle's operating status (IG1 power signal, engine speed / READY status, low-voltage battery voltage). This method not only simplifies the structure of the ignition lock, but also increases the vehicle's starting stability, implements undervoltage protection, and extends the service life of the low-voltage battery. It also avoids driving safety hazards caused by the driver shutting down running electrical appliances due to low voltage in the low-voltage battery while driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a flow chart of an IG2 power automatic control method based on vehicle operating status in an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the structure of an IG2 power automatic control system based on vehicle working status in an embodiment of the present invention.

[0024] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0025] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Currently, in the relevant technical field, the existing IG2 power supply control has the characteristics of complex ignition lock structure, risk of starting failure and impact on the service life of the low-voltage battery.

[0027] To address this issue, various embodiments of the present invention are proposed for a method and system for automatically controlling an IG2 power supply based on the vehicle's operating status. The method and system provide for automatically controlling a commercial vehicle's IG2 power supply (which powers electrical appliances such as dryers and air conditioners) by monitoring the vehicle's operating status (IG1 power signal, engine speed / READY status, and low-voltage battery voltage). This method not only simplifies the ignition lock structure but also increases vehicle startup stability, implements undervoltage protection, and extends the service life of the low-voltage battery. It also avoids potential driving safety hazards caused by the driver shutting down running electrical appliances due to low-voltage batteries.

[0028] The embodiment of the present invention provides an IG2 power automatic control method based on the vehicle working state, referring to Figure 1 , Figure 1 Schematic diagram of the flow of an embodiment of the IG2 power automatic control method based on the vehicle working status of the present invention.

[0029] In this embodiment, the IG2 power automatic control method based on the vehicle operating state includes the following steps:

[0030] In step S100 , the vehicle body controller detects whether an IG1 power signal is received.

[0031] Step S200: If yes, the vehicle body controller controls the connection state between the IG2 power relay and the power source according to the collected vehicle operating state;

[0032] Step S300: If not, the IG2 power relay disconnects the plurality of electrical appliances from the power supply.

[0033] Specifically, the vehicle operating status includes the IG2 power supply control switch, speed, READY signal, low-voltage battery voltage and start signal.

[0034] On this basis, the body controller controls the connection status of the IG2 power relay and the power supply according to the collected vehicle working status, specifically including:

[0035] (1) When the IG2 power control switch is off, the body controller controls the IG2 power relay to close, providing power to several electrical appliances;

[0036] (2) When the IG2 power control switch is closed, the body controller controls the connection status between the IG2 power relay and the power supply according to the speed, READY signal, low-voltage battery voltage and start signal.

[0037] The body controller controls the connection status between the IG2 power relay and the power supply based on the speed, READY signal, low-voltage battery voltage, and start signal. Specifically, the following situations occur:

[0038] (1) When the start signal is valid, the body controller controls the IG2 power relay to be disconnected;

[0039] (2) When the speed is greater than a first preset speed, the READY signal is in the READY state, and the low-voltage battery voltage is less than a first preset voltage value, the body controller controls the IG2 power relay to be disconnected;

[0040] (3) When the speed is less than a second preset speed, the READY signal is in a non-READY state, and the low-voltage battery voltage is less than a second preset voltage value, the body controller controls the IG2 power relay to be disconnected;

[0041] (4) Otherwise, the body controller controls the IG2 power relay to close.

[0042] It should be noted that, in the above logical judgment process, the first preset speed is 350rpm; when the vehicle is a 24V model, the first preset voltage value is 22V, and when the vehicle is a 12V model, the first preset voltage value is 10V; the second preset speed is 200rpm; when the vehicle is a 24V model, the first preset voltage value is 23V, and when the vehicle is a 12V model, the first preset voltage value is 11V.

[0043] In a preferred embodiment, the vehicle body controller collects the vehicle operating status via the CAN bus.

[0044] In order to explain the present application more clearly, a specific example of an IG2 power automatic control method based on a vehicle operating state is proposed.

[0045] See Figure 2 In this embodiment, the automatic control of the IG2 power supply is achieved by collecting the speed / READY signal and the low-voltage battery voltage through the CAN bus and collecting the IG2 power supply control switch signal and the start signal through the hard line.

[0046] Among them, the control process of the IG2 power automatic control method based on the vehicle working status proposed in this embodiment is: first, it is detected whether there is a key electrical signal (IG1 power signal). If not, the body controller does not work, the IG2 power relay is disconnected, and each electrical appliance has no power; if it is, the status of the IG2 power control switching switch is monitored (when closed, it is the IG2 power automatic control state, and when disconnected, it is the non-automatic control state).

[0047] 1. When the switch is open, the controller controls the IG2 power relay to close and provide power to the electrical appliances;

[0048] 2. When the switch is closed, the controller collects the speed / READY signal, the low-voltage battery voltage signal, and the hard-wired start signal through the CAN bus to perform the following logical judgment:

[0049] When the start signal is valid, it means that the vehicle is ready to start. At this time, the controller controls the IG2 power relay to be disconnected, and the low-voltage battery does not supply power to the electrical appliances under the IG2 power relay. This part of the energy is used to start the vehicle, thereby improving the starting stability of the vehicle.

[0050] If the speed is >350rpm / READY state and the low-voltage battery voltage is <22V (24V model, if it is a 12V model, the condition should be low-voltage battery voltage <10V), it means that the vehicle is in the starting state and the generator is not working properly, and the low-voltage battery is undervoltage. At this time, the controller controls the IG2 power relay to disconnect, and no power is provided to the electrical appliances, thereby protecting the low-voltage battery and extending its service life;

[0051] If the speed is less than 200rpm / not in READY state and the low-voltage battery voltage is less than 23V (for 24V models, if it is a 12V model, the condition should be that the low-voltage battery voltage is less than 11V), it means that the vehicle is not started, but the low-voltage battery is undervoltage. At this time, the controller controls the IG2 power relay to disconnect and not provide power to the electrical appliances. This not only protects the low-voltage battery and extends its service life, but also saves power for vehicle starting, reducing the risk of vehicle starting failure;

[0052] In other situations, the controller controls the IG2 power relay to close and provide power to the electrical appliances.

[0053] It should be noted that the IG2 power automatic control method based on the vehicle operating status proposed in this embodiment is applicable to fuel-powered commercial vehicles and electric commercial vehicles with electronic control devices (such as body controllers, etc.).

[0054] The IG2 power automatic control method based on the vehicle operating status proposed in this embodiment has the following advantages over the existing IG2 power control method:

[0055] (1) The ignition lock structure is simplified.

[0056] (2) This embodiment not only improves the starting stability of the vehicle, but also extends the service life of the low-voltage battery.

[0057] (3) This embodiment is in line with the development trend of future smart cars, frees up part of the driver's attention, and improves the driver's driving comfort.

[0058] This embodiment provides a method and system for automatically controlling the IG2 power supply based on the vehicle's operating status. By monitoring the vehicle's operating status (IG1 power signal, engine speed / READY status, and low-voltage battery voltage), this method automatically controls the IG2 power supply (which powers electrical appliances such as dryers and air conditioners) in commercial vehicles. This method not only simplifies the ignition lock structure but also improves vehicle startup stability, implements undervoltage protection, and extends the service life of the low-voltage battery. It also avoids potential safety hazards that could arise from drivers shutting down running electrical appliances due to low-voltage batteries while driving.

[0059] The above are only preferred embodiments of the invention and are not intended to limit the patent scope of the invention. Any equivalent structure or equivalent process transformation made using the contents of the invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the invention.

Claims

1. A method for automatically controlling an IG2 power supply based on a vehicle's operating status, characterized in that: The method comprises the following steps: The body controller detects whether it receives the IG1 power signal; If so, the body controller controls the connection state of the IG2 power relay and the power supply according to the collected vehicle operating state, wherein the body controller collects the vehicle operating state through the CAN bus, and the vehicle operating state includes the IG2 power control switching switch, the speed, the READY signal, the low-voltage battery voltage and the start signal; when the IG2 power control switching switch is closed, the body controller controls the connection state of the IG2 power relay and the power supply according to the speed, the READY signal, the low-voltage battery voltage and the start signal, specifically including: when the start signal is valid, the body controller controls the IG2 power relay to be disconnected; when the speed is greater than a first preset speed, the READY signal is in a READY state and the low-voltage battery voltage is less than a first preset voltage value, the body controller controls the IG2 power relay to be disconnected; when the speed is less than a second preset speed, the READY signal is in a non-READY state and the low-voltage battery voltage is less than a second preset voltage value, the body controller controls the IG2 power relay to be disconnected; otherwise, the body controller controls the IG2 power relay to be closed; If not, the IG2 power relay disconnects several electrical consumers from the power supply.

2. The IG2 power automatic control method based on vehicle operating status according to claim 1, characterized in that: The vehicle body controller controls the connection state of the IG2 power relay and the power supply according to the collected vehicle working state, and specifically includes: When the IG2 power control switch is off, the body controller controls the IG2 power relay to close, providing power to several electrical appliances.

3. The IG2 power automatic control method based on vehicle operating status according to claim 1, characterized in that: The first preset speed is 350 rpm; when the vehicle is a 24V model, the first preset voltage value is 22V, and when the vehicle is a 12V model, the first preset voltage value is 10V.

4. The IG2 power automatic control method based on vehicle operating status according to claim 1, characterized in that: The second preset speed is 200 rpm; when the vehicle is a 24V model, the first preset voltage value is 23V, and when the vehicle is a 12V model, the first preset voltage value is 11V.

5. An IG2 power supply automatic control system based on vehicle working status, characterized in that: The IG2 power supply automatic control system based on the vehicle working status includes a body controller, an IG2 power supply relay and several electrical appliances connected in sequence. The body controller collects the vehicle working status. The IG2 power supply automatic control system based on the vehicle working status executes the IG2 power supply automatic control method based on the vehicle working status as described in any one of claims 1-4.

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