CN-122018390-A - Control method for recycling or draining sewage of new energy pure electric washing and sweeping vehicle

Abstract

The invention belongs to the technical field of sanitation vehicle control, in particular to a control method for recycling or draining sewage of a new energy pure electric washing and sweeping vehicle, which aims at the problems of high frequency of water adding and sewage draining and large power consumption caused by invalid load of the existing washing and sweeping vehicle, the weight is monitored in real time through the weight sensors of the clean water tank and the sewage tank, and the sewage purification and waterway transmission controller and the whole vehicle controller are cooperatively decided by combining the water level signal of the sewage tank. When the clean water tank is not enough and the sewage tank meets the conditions, the automatic starting purification device supplements the treated clean water into the clean water tank, and when the clean water tank is full and the sewage tank still has residual liquid, the automatic switching to the drainage mode is performed. The invention realizes the intelligent recycling and discharge of sewage, and obviously reduces the exogenous water supplementing times and ineffective bearing weight, thereby improving the operation efficiency, reducing the energy consumption of the vehicle and prolonging the endurance mileage.

Inventors

• HUANG XIANJUN

Assignees

• 东风华神汽车有限公司

Dates

Publication Date

20260512

Application Date

20251230

Claims (8)

1. 1. The control method for the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle is characterized in that the washing and sweeping vehicle comprises a clean water tank, a sewage purifying device and a pipeline system which are connected between the sewage tank and the clean water tank, a high-voltage power supply system for supplying power to the purifying device, a clean water tank weight sensor, a sewage tank water level sensor, a sewage purifying and waterway transmission controller and a whole vehicle controller; the method comprises the following steps: S1, calibrating an initial weight M1 of a clean water tank when the clean water tank is fully loaded and an initial weight M2 of a sewage tank when the sewage tank is unloaded; S2, judging whether the real-time weight of the clean water tank is continuously lower than or equal to a first threshold value K1 and M1 based on the data of the weight sensor of the clean water tank, and generating a clean water tank state signal, wherein K1 is a coefficient smaller than 1; s3, judging whether the sewage tank meets the cleanable condition or not based on the sewage tank weight sensor data and the sewage tank water level sensor signal, and generating a sewage tank state signal; S4, the sewage purification and waterway transmission controller synthesizes the clean water tank state signal and the sewage tank state signal, and is communicated with the whole vehicle controller, and the start, stop and working modes of the high-voltage power supply system and the sewage purification and pipeline system are cooperatively controlled so as to execute the operation that the sewage is purified and recycled to the clean water tank or directly discharged out of the vehicle.
2. 2. The method for controlling the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle according to claim 1 is characterized in that in the step S2, the value range of K1 in the first threshold K1 is 0.7 to 0.9, the condition is judged that the real-time weight of the clean water tank is continuously smaller than or equal to K1M 1 for a first preset time period T1, a low water level trigger signal of the clean water tank is generated, and if the continuous T1 is larger than K1M 1, a high water level standby signal of the clean water tank is generated.
3. 3. The method for controlling the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle according to claim 1 or 2, wherein in step S3, determining whether the sewage tank satisfies the cleanable condition specifically comprises: If the real-time weight of the sewage tank is continuously greater than or equal to a second threshold value K2 for a second preset time period T2 and a water level sensor signal is received, generating a cleanable trigger signal of the sewage tank, wherein K2 is a coefficient greater than 1; If the real-time weight continuous T2 of the sewage tank is smaller than K2 and the water level sensor signal is received, generating a cleanable trigger signal of the sewage tank; if the water level sensor signal is not received, a sewage tank prohibition purification signal is generated regardless of the real-time weight of the sewage tank.
4. 4. The method for controlling the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle according to claim 3, wherein the value range of K2 in the second threshold K2 is 1.1-1.5, and the first preset duration T1 and the second preset duration T2 are 3-10 seconds.
5. 5. The method for controlling the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle according to claim 3, wherein in the step S4, the condition for executing the sewage purifying and recycling is that a clean water tank low water level trigger signal and a sewage tank cleanable trigger signal are received simultaneously, and the purifying and recycling process is continuously carried out until the real-time weight of the clean water tank reaches or approaches M1, or a sewage tank state signal becomes a purifying prohibition signal.
6. 6. The method for controlling sewage recycling or draining of a new energy pure electric washing and sweeping vehicle according to claim 3, wherein in the step S4, the sewage draining is performed under the condition that when the real-time weight of the clean water tank is greater than K1 and reaches or approaches M1, if the cleanable trigger signal of the clean water tank is still received, the pipeline system is controlled to switch to a draining mode, and the liquid in the clean water tank is drained until the signal of the water level sensor disappears.
7. 7. The method for controlling the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle according to claim 1 is characterized in that the sewage purifying and waterway transmission controller and the whole vehicle controller are communicated through a CAN bus, and the clean water tank state signal, the sewage tank state signal and the control command are transmitted in the form of CAN messages.
8. 8. The method for controlling the sewage recycling or draining of the new energy pure electric washing and sweeping vehicle according to claim 1, wherein the method further comprises a learning and adapting step of recording the clean water consumption rate and the sewage generation rate in the historical operation data and dynamically adjusting the coefficients K1 and K2 or the values of the preset durations T1 and T2 based on the clean water consumption rate and the sewage generation rate.

Description

Control method for recycling or draining sewage of new energy pure electric washing and sweeping vehicle Technical Field The invention relates to the technical field of sanitation vehicle control, in particular to a control method for recycling or draining sewage of a new energy pure electric washing and sweeping vehicle. Background Along with the popularization of new energy technology in the field of special vehicles, the pure electric washing and sweeping vehicle is widely applied to urban sanitation operation due to the advantages of zero emission, low noise and the like, and a typical pure electric washing and sweeping vehicle is generally provided with a clean water tank and a sewage tank. This traditional mode of operation has significant drawbacks: Firstly, frequent water addition and pollution discharge processes occupy a large amount of effective operation time, and for a vehicle type with a load capacity of 18 tons, the daily water addition time may occupy one fourth of the total operation time, thereby seriously reducing the continuity and the overall efficiency of sanitation operation. Secondly, the vehicle is often operated under non-optimal load conditions, for example, when the fresh water tank is depleted and is going to be filled with water, the vehicle still carries a full-load sewage tank, or when the sewage tank is fully loaded and is going to be discharged with dirt, the vehicle simultaneously carries the rest of fresh water. The driving load of the motor is obviously increased by the 'invalid load', so that unnecessary electric energy consumption is caused, the single-charging endurance mileage of the vehicle is shortened, the daily charging times are increased or a battery pack with larger capacity is required to be configured, and the operation cost and the vehicle manufacturing cost are increased. Therefore, a control method capable of intelligently managing the water tank system of the washing and sweeping vehicle and realizing sewage recycling and dynamic adjustment of the weight of the whole vehicle is needed, so that the operation efficiency and the energy utilization rate are improved. Disclosure of Invention Based on the technical problems in the prior art, the invention provides a control method for recycling or draining sewage of a new energy pure electric washing and sweeping vehicle. The invention provides a control method for sewage recycling or draining of a new energy pure electric washing and sweeping vehicle, which at least comprises a clean water tank, a sewage purifying device and a pipeline system which are connected between the sewage tank and the clean water tank, a high-voltage power supply system for supplying power to the purifying device, a clean water tank weight sensor, a sewage tank water level sensor, a sewage purifying and waterway transmission controller and a whole vehicle controller. The control method comprises the following steps: Step S1, initializing the system The initial weight M1 of the clean water tank in the full-load clean water state and the initial weight M2 of the sewage tank in the no-load state are calibrated, and the M1 and the M2 are stored in a system of the sewage purification and waterway transmission controller. Step S2, clear water tank state monitoring and triggering judgment The current weight of the clear water tank is acquired in real time through a clear water tank weight sensor and is sent to a sewage purification and waterway transmission controller, and the controller compares the received real-time weight with a first threshold value (0.8 x M1): and if the real-time weight is continuously smaller than or equal to a first threshold value for a first preset time period (for example, 5 seconds), generating a clear water tank low water level trigger signal. And if the real-time weight is longer than the first threshold value in the continuous first preset time, generating a high water level standby signal of the clean water tank. Step S3, monitoring and triggering judgment of sewage tank state The current weight of the sewage tank is acquired in real time through a sewage tank weight sensor and is sent to a sewage purification and waterway transmission controller, and the controller compares the received real-time weight with a second threshold value (1.2 x M2) and synchronously monitors signals of the sewage tank water level sensor: If the real-time weight is continuously greater than or equal to a second threshold for a second preset time period (for example, 5 seconds), and a water level sensor signal is received, a cleanable trigger signal of the sewage tank is generated. And if the real-time weight is continuously longer than or equal to a second preset time period and is not received by the water level sensor signal, generating a sewage tank purifying prohibition signal. And if the real-time weight is continuously smaller than the second threshold value for a second preset time period and the water level sensor signal