Hybrid power commercial motor home camping mode control method

Abstract

The invention relates to the technical field of new energy automobiles, in particular to a hybrid power commercial motor home camping mode control method which comprises the following specific steps: pressing a camping mode key, judging whether a condition for entering the mode is met or not, entering the camping mode, enabling a battery to automatically discharge through an inverter DC / AC (Direct Current / Alternating Current) of the whole automobile, and controlling the camping mode to be a camping mode. The method comprises the following steps that: an upper part takes electricity for a long time through an inverter, judges whether the SOC value of a battery is less than or equal to E2, and if so, displays that the electric quantity is low and the power supply of an engine is moderate, and meanwhile, a VCU sends an engine starting instruction, the engine is started and generates electricity at a certain rated engine rotating speed, so that the problem that a mechanical inflating pump needs to be started due to various reasons such as insufficient air pressure of the engine at the present stage is solved; frequent starting such as electricity supplement is needed due to insufficient electric quantity, so that customers cannot rest quietly; gears can be randomly switched by mistaken touch under the parking condition, so that the vehicle moves; and the electric quantity of the power battery cannot be maintained and is easy to consume, so that the vehicle cannot be started or power output is limited.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a method for controlling a camping mode of a hybrid commercial RV. Background Art

[0002] With the popularization of hybrid new energy passenger cars, people have gradually accepted hybrid new energy vehicles, and the number of people buying new energy vehicles has increased year by year. At the same time, with the vigorous promotion of the national new energy strategy, the commercial vehicle field has also undergone earth-shaking changes. More and more plug-in hybrid new energy commercial vehicles have been gradually launched and commercialized. As a sub-market of commercial vehicles, RVs are favored by customers because of their high carrying capacity and large space, so higher requirements are put forward for the chassis system of commercial vehicles.

[0003] Most of the current plug-in hybrid new energy RVs are modified based on the logistics version of trucks, without fully considering the RV's vehicle usage environment and customer needs, resulting in the inability to draw electricity normally sometimes. The engine needs to start a mechanical air pump due to various reasons such as insufficient air pressure; frequent starts such as insufficient power and the need to replenish power prevent customers from resting quietly; the gear can be accidentally switched when parked, causing the vehicle to move; the power battery cannot maintain its power and is easily exhausted, causing the vehicle to be unable to start or limit power output and other safety hazards. Summary of the invention

[0004] The present invention provides a control method for the camping mode of a hybrid commercial RV. Based on the characteristics of plug-in hybrid new energy vehicles, it does not require the addition of additional life batteries, and directly draws power from the entire vehicle for use by the upper body, while taking into account the NVH performance of the entire vehicle and safety performance such as anti-mistouch, and real-time monitoring of the power battery SOC value to ensure that the RV customers can draw power and use electricity in the most quiet way. Only when the power battery SOC is detected to be lower than a certain set threshold, the engine is started to drive the motor to generate electricity to ensure power consumption for the upper body and replenish the power battery.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a method for controlling a camping mode of a hybrid commercial RV, and the specific steps are as follows: Step S1, when the vehicle enters the camping site, the vehicle does not turn off the power and maintains the "READY" state, the shifter is placed in "N" or "P", and the parking button is pulled up at the same time, the parking system starts working and sends a parking signal to the VCU. The initial power retention threshold of the power battery in the RV camping mode is calibrated as E1, the minimum SOC discharge value allowed by the battery is calibrated as E2, and the second power retention threshold of the power battery in the RV camping mode is calibrated as E3; Step S2, manually set E1 and E3 in MP5, and E3 ≤ E1. If E3 exceeds E1, it will be displayed in gray, and the system defaults to E3 = E1; Step S3, press the camping mode button and determine whether the conditions for entering the mode are met. If so, proceed to step S4. Step S4, enter the camping mode, the battery is discharged autonomously through the DC / AC inverter of the vehicle, and the upper body is powered by the inverter for a long time, and it is determined whether the battery SOC value is ≤ E2. If so, execute step S5; Step S5, the instrument displays "low battery, engine recharging", and the VCU sends an engine start command. The engine starts, and the VCU integrates the power consumption of the upper equipment and the battery recharging power, while taking into account the NVH performance of the whole vehicle, and finally generates electricity at a certain rated engine speed. The power generation is allocated to the upper equipment on the one hand to ensure uninterrupted power consumption of the upper equipment, and on the other hand to the power battery to quickly replenish the power battery.

[0006] Further defined, the step S3 of determining whether the condition for entering the mode is met includes the following steps: Step S3.1, after pressing the camping mode button, the VCU detects the information of step S1. If it is not executed, the instrument displays the corresponding information, such as "vehicle is not READY", "brake system is not working", "gear is not returned to N or P", and step 1 needs to be performed manually. If it is executed, go to step 3.2; Step S3.2, VCU detects whether there is a serious fault level in each controller of the vehicle. If so, the instrument prompts "Vehicle XX controller is faulty and cannot enter camping mode. If not, go to step 3.3; Step S3.3, VCU detects the vehicle speed. If the vehicle speed V>V1, the instrument prompts "vehicle speed fault" and the camping mode cannot be entered. Among them, V1 is calibrated to a minimum value, generally 1km / h. V1 is used to prevent accidental touch of the camping mode button and parking signal disorder during driving, resulting in vehicle failure and loss of control. If V≤V1, VCU locks the gear position "N or P" and no longer judges the gear position signal of the shifter to prevent the vehicle from moving due to accidental touch. At the same time, VCU locks the AutoHold function and is no longer released by other signals, and enters step S3.4 at the same time; Step S3.4, VCU detects the first SOC value E1 threshold set for the power battery. If SOC < E1, VCU starts the engine and replenishes the power at the maximum charging power allowed by the current vehicle until E1 is met, then enters step S3.5. When SOC ≥ E1, directly enters step S3.5; Step S3.5, VCU detects the brake pressure, where P1 represents the pneumatic brake pressure relief threshold, which can be calibrated independently due to different vehicle models. When P<P1, VCU starts the engine to supplement the brake pressure until P1 is met, and then enters step S4. When P≥P1, it directly enters step S4.

[0007] It is further specified that in camping mode, the instrument displays camping mode and starts counting. After 60 seconds, the instrument screen goes black, and lights not related to this mode and the vehicle's own electrical equipment enter sleep mode.

[0008] Further defined, in the camping mode, E1≥E3>E2, E3-E2≥10%, and at the same time, it is determined whether the power battery SOC is ≤E2, if not, the current state is maintained, if yes, the engine continues to replenish power at a certain rated speed until E3, and then step S6 is executed; Step S6, the meter displays that the power replenishment is completed, and the meter goes black again after counting for 10 seconds; at the same time, the VCU sends an engine shutdown command, and the engine is shut down.

[0009] It is further defined that in camping mode, P2 represents the lowest threshold of the vehicle's brake pressure. The VCU detects the brake pressure. If P≤P2, the instrument will prompt "Air pressure is too low, please do not drive" when it ends sleep mode.

[0010] It is further specified that when the brake pressure is P≤P2, the rear wheels will lock, the entire vehicle will be locked and unable to move. When the camping mode is released, the entire vehicle will be re-inflated.

[0011] It is further defined that, in camping mode, E2 is ≤10% under normal conditions.

[0012] The beneficial effects of adopting the above technical solution are: Based on the characteristics of plug-in hybrid new energy vehicles, there is no need to add additional life batteries. Power can be directly drawn from the whole vehicle for use in the upper equipment. At the same time, the NVH performance of the whole vehicle and safety performance such as anti-mistouch can be taken into account. The power battery SOC value is monitored in real time to ensure that RV customers can use electricity as quietly as possible. Only when the power battery SOC is detected to be lower than a set threshold, the engine starts to drive the motor to generate electricity to ensure power consumption of the upper equipment and replenish the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The control architecture flow chart of the present invention is Figure 2 The overall control strategy flow chart of the present invention is DETAILED DESCRIPTION

[0014] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0015] The present invention is a control method for the camping mode of a hybrid commercial RV. It does not require additional life batteries and directly draws power from the entire vehicle for use by the upper installation. At the same time, it takes into account the NVH performance of the entire vehicle and safety performance such as anti-mistouch, and monitors the SOC value of the power battery in real time to ensure that RV customers can obtain electricity and use electricity in the quietest possible manner.

[0016] Specifically, Figure 1 and Figure 2 As shown, the specific steps include: Step S1, when the vehicle enters the camping site, the vehicle does not turn off the power and maintains the "READY" state, the shifter is placed in "N" or "P", and the parking button is pulled up at the same time, the parking system starts working and sends a parking signal to the VCU. The initial power retention threshold of the power battery in the RV camping mode is calibrated as E1, the minimum SOC discharge value allowed by the battery is calibrated as E2, and the second power retention threshold of the power battery in the RV camping mode is calibrated as E3; Step S2, manually set E1 and E3 in MP5, and E3 ≤ E1, if E3 exceeds E1, it is displayed in gray, and the system defaults to E3 = E1; Step S3.1: After pressing the camping mode button, the VCU detects the information of step S1. If it is not executed, the instrument displays the corresponding information, such as "vehicle is not READY", "brake system is not working", "gear is not returned to N or P". Step 1 needs to be performed manually. If it is executed, go to step 3.2. Step S3.2, VCU detects whether there is a serious fault level in each controller of the vehicle. If so, the instrument prompts "Vehicle XX controller is faulty and cannot enter camping mode. If not, go to step 3.3; Step S3.3, VCU detects the vehicle speed. If the vehicle speed V>V1, the instrument prompts "vehicle speed fault" and the camping mode cannot be entered. Among them, V1 is calibrated to a minimum value, generally 1km / h. V1 is used to prevent accidental touch of the camping mode button and parking signal disorder during driving, which may cause the vehicle to fail and lose control. If V≤V1, VCU locks the gear position "N or P" and no longer judges the shifter gear signal to prevent the vehicle from moving due to accidental touch. At the same time, VCU locks the AutoHold function and is no longer released by other signals to prevent the vehicle's braking system from being released due to accidental touch, causing the vehicle to move and cause a safety accident, and then enters step S3.4; Step S3.4, VCU detects the first SOC value E1 threshold set for the power battery. If SOC < E1, VCU starts the engine and replenishes the power at the maximum charging power allowed by the current vehicle until E1 is met, then enters step S3.5. When SOC ≥ E1, directly enters step S3.5; Step S3.5, VCU detects the brake pressure, where P1 represents the pneumatic brake pressure relief threshold, which can be calibrated independently due to different vehicle models. When P<P1, VCU starts the engine to supplement the brake pressure until P1 is met, and then enters step S4. When P≥P1, it directly enters step S4; Step S4, enter the camping mode, the instrument displays the camping mode and counts, the instrument screen goes black after 60 seconds, the lights and electrical equipment of the vehicle that are not related to this mode enter the dormant state, the battery discharges autonomously through the DC / AC inverter of the vehicle, and the upper equipment draws power for a long time through the inverter. E2 is ≤10% under normal conditions, and it is determined whether the battery SOC value is ≤E2. If so, execute step S5; Step S5, the instrument displays "low battery, engine recharging", and at the same time, the VCU sends an engine start command, the engine starts, and the VCU integrates the power consumption of the upper equipment and the battery recharging power, and takes into account the NVH performance of the whole vehicle, and finally generates electricity at a certain rated engine speed. The power generation is allocated to the upper equipment on the one hand to ensure uninterrupted power consumption of the upper equipment, and on the other hand to the power battery, and the power battery is quickly replenished to E3. In the camping mode, E1≥E3>E2, E3-E2≥10%, and at the same time, it is determined whether the power battery SOC is ≤E2. If not, the current state is maintained. If so, the engine continues to recharge to E3 at a certain rated speed, and then step S6 is executed; Step S6, the meter displays that the power replenishment is completed, and the meter goes black again after counting for 10 seconds; at the same time, the VCU sends an engine shutdown command, and the engine is shut down.

[0017] Please note that in camping mode, when the brake pressure P≤P2, the rear wheels will lock, the entire vehicle will be locked and unable to move. When the camping mode is released, the entire vehicle needs to be re-inflated.

[0018] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for controlling a camping mode of a hybrid commercial RV, characterized in that: The specific steps are as follows: Step S1, when the vehicle enters the camping site, the vehicle does not turn off the power and maintains the "READY" state, the shifter is placed in "N" or "P", and the parking button is pulled up, the parking system starts working, and sends a parking signal to the VCU. The initial power retention threshold of the power battery in the RV camping mode is calibrated as E1, the minimum SOC discharge value allowed by the battery is calibrated as E2, and the second power retention threshold of the power battery in the RV camping mode is calibrated as E3; Step S2, manually set E1 and E3 in MP5, and E3 ≤ E1. If E3 exceeds E1, it will be displayed in gray, and the system defaults to E3 = E1; Step S3, press the camping mode button and determine whether the conditions for entering the mode are met. If so, proceed to step S4. Step S4, enter the camping mode, the battery is discharged autonomously through the DC / AC inverter of the vehicle, the upper body is powered by the inverter for a long time, and the VCU determines whether the battery SOC value is ≤ E2, if so, execute step S5; Step S5, the instrument displays "low battery, engine recharging", and the VCU sends an engine start command. The engine starts, and the VCU integrates the power consumption of the upper equipment and the battery recharging power, while taking into account the NVH performance of the whole vehicle, and finally generates electricity at a certain rated engine speed. The power generation is allocated to the upper equipment on the one hand to ensure uninterrupted power consumption of the upper equipment, and on the other hand to the power battery to quickly replenish the power battery to E3.

2. A hybrid commercial RV camping mode control method according to claim 1, characterized in that: In step S3, determining whether the conditions for entering the mode are met includes the following steps: Step S3.1, after pressing the camping mode button, the VCU detects the information of step S1. If it is not executed, the instrument displays the corresponding information, such as "vehicle is not READY", "brake system is not working", "gear is not returned to N or P". Step 1 needs to be performed manually. If it is executed, go to step 3.2; Step S3.2, VCU detects whether there is a serious fault level in each controller of the vehicle. If so, the instrument prompts "Vehicle XX controller is faulty and cannot enter camping mode". If not, go to step 3.3; Step S3.3, VCU detects the vehicle speed. If the vehicle speed V>V1, the instrument prompts "vehicle speed failure" and the camping mode cannot be entered. Among them, V1 is calibrated to a minimum value, generally 1km / h. V1 is used to prevent accidental touch of the camping mode button and parking signal disorder during driving, resulting in vehicle failure and loss of control. If V≤V1, VCU locks the gear position "N or P" and no longer judges the gear position signal of the shifter to prevent the vehicle from moving due to accidental touch. At the same time, VCU locks the AutoHold function and is no longer released by other signals, and enters step S3.4 at the same time; Step S3.4, VCU detects the first SOC value E1 threshold set for the power battery. If SOC < E1, VCU starts the engine and replenishes the power at the maximum charging power allowed by the current vehicle until E1 is met, then enters step S3.

5. When SOC ≥ E1, directly enters step S3.5; Step S3.5, VCU detects the brake pressure, where P1 represents the pneumatic brake pressure relief threshold, which can be calibrated independently due to different vehicle models. When P<P1, VCU starts the engine to supplement the brake pressure until P1 is met, and then enters step S4. When P≥P1, it directly enters step S4.

3. A hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, the instrument displays camping mode and starts counting. After 60 seconds, the instrument screen goes black, and lights not related to this mode and the vehicle's own electrical equipment enter sleep mode.

4. A hybrid commercial RV camping mode control method according to claim 1, characterized in that: In the camping mode, E1≥E3>E2, E3-E2≥10%, and it is determined whether the power battery SOC is ≤E2. If not, the current state is maintained. If so, the engine continues to charge at a certain rated speed until E3, and then step S6 is executed; Step S6, the meter displays that the power replenishment is completed, and the meter goes black again after counting for 10 seconds; at the same time, the VCU sends an engine shutdown command, and the engine is shut down.

5. A hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, P2 represents the lowest threshold of the vehicle's brake pressure. The VCU detects the brake pressure. If P≤P2, the instrument will prompt "Air pressure is too low, please do not drive" when it ends sleep mode.

6. A hybrid commercial RV camping mode control method according to claim 5, characterized in that: When the brake pressure P≤P2, the rear wheels will lock, the entire vehicle will be locked and unable to move. When the camping mode is released, the vehicle will be re-inflated to replenish the required air pressure.

7. A hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, E2 is generally ≤10%.

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