Urban watering truck based on the combination of working condition subdivision fuel consumption optimization method

Abstract

The present application relates to a city watering truck based on the combination of oil consumption optimization method of subdivided working condition, contain the following process: engine surface working condition fuel economy optimization process, for designing EP double speed regulation characteristic curve, optimization watering truck transfer condition oil consumption; engine line working condition fuel economy optimization process, for designing intelligent PTO function, control engine speed operation, optimization watering operation working condition oil consumption; engine point working condition fuel economy optimization process, for designing water adding working condition point, and carry out oil consumption optimization, reduce the parking condition oil consumption. The present application can make the engine run in the set speed operation, reduce the additional power consumption, significantly improve the operation working condition oil consumption; can very good constraint engine high speed low load operation, is favorable to reduce the whole vehicle oil consumption; its idle oil consumption also reduces the influence for the oil consumption of environmental sanitation vehicle, significantly improves the oil consumption level.

Description

Technical Field

[0001] This invention relates to the field of fuel economy optimization technology for sprinkler trucks, and more specifically to a method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions. Background Technology

[0002] Sanitation vehicles are special vehicles mainly used for urban appearance management and cleaning. Sanitation vehicles are mainly divided into water sprinkler trucks and garbage trucks, with water sprinkler trucks accounting for more than 50% of sanitation vehicles.

[0003] The shortcomings of existing technology are:

[0004] Sanitation sprinkler trucks have low loads and low engine exhaust temperatures, making it difficult for after-treatment to reach the temperature range where the conversion efficiency is high. EGR architecture engines generally reduce NOx in the engine through exhaust gas recirculation to meet the system's NOx emission requirements, while non-EGR architecture engines generally improve exhaust temperature through engine thermal management to improve the conversion efficiency of after-treatment and meet the system's emission requirements. These measures inevitably increase engine fuel consumption.

[0005] At the same time, bad driving habits of drivers, such as using low gears when the water truck is empty and moving to add water or returning fully loaded, and running the engine at high speed and low load, are not conducive to reducing the overall fuel consumption of the vehicle and are also difficult to control.

[0006] 3. Sanitation vehicles mostly operate in urban areas. Due to traffic conditions, the engine operates at idle speed for a high percentage of the time, and idle fuel consumption also has a certain impact on the fuel consumption of sanitation vehicles.

[0007] Currently, the overall fuel consumption of sanitation sprinkler trucks varies greatly. How to achieve optimal fuel consumption for sanitation sprinkler trucks is an urgent problem that needs to be solved. Summary of the Invention

[0008] This invention addresses the aforementioned problems by providing a combined fuel consumption optimization method for urban sprinkler trucks based on detailed operating conditions. Its aim is to optimize the overall fuel consumption of sanitation vehicles. This method allows the engine to operate at a set speed, reducing additional power consumption and significantly improving fuel consumption under operating conditions. It effectively constrains high-speed, low-load engine operation, contributing to lower overall vehicle fuel consumption. Furthermore, it reduces the impact of idling fuel consumption on the fuel consumption of sanitation vehicles, significantly improving overall fuel efficiency.

[0009] To solve the above problems, the technical solution provided by the present invention is as follows:

[0010] A method for optimizing the combined fuel consumption of urban sprinkler trucks based on detailed operating conditions includes the following steps:

[0011] The process for optimizing fuel economy under engine operating conditions is used to design the EP dual speed regulation characteristic curve and optimize the fuel consumption of sprinkler trucks during relocation.

[0012] The engine line operating condition fuel economy optimization process is used to design intelligent PTO function, control the engine to run at a constant speed, and optimize fuel consumption during water spraying operations.

[0013] The engine operating condition fuel economy optimization process is used to design the water addition operating condition and optimize fuel consumption to reduce fuel consumption during parking.

[0014] Preferably, in the engine point condition fuel economy optimization process, water is added remotely via PTO to operate at a specified point, and the fuel consumption during parking is reduced by optimizing the fuel consumption at the engine idle point.

[0015] Preferably, the engine surface condition fuel economy optimization process specifically includes the following steps:

[0016] Sa100. Design a first speed regulation characteristic curve and a second speed regulation characteristic curve; the first speed regulation characteristic curve corresponds to the engine's P gear; the second speed regulation characteristic curve corresponds to the engine's E gear.

[0017] Sa200 collects the current engine operating conditions; the engine operating conditions include normal operating mode and high-speed operating mode.

[0018] Sa300. Based on the collected current engine operating conditions, perform the following operations:

[0019] If the current engine operating condition is the normal operating mode, then the engine is set to E gear;

[0020] If the current engine operating condition is the high-speed operating mode, then the engine is placed in P gear;

[0021] Sa400. Based on the current engine gear, perform the following operations:

[0022] If the engine is currently in P gear, then the first speed regulation characteristic curve is used;

[0023] If the engine is currently in gear E, then the second speed regulation characteristic curve is used.

[0024] Preferably, the engine line operating condition fuel economy optimization process specifically includes the following steps:

[0025] Sb100. Put the engine in PTO mode;

[0026] Sb200. In the PTO mode, the on-board MCU uses the PTO switch to adjust and set the engine speed, thereby controlling the output of engine power;

[0027] Sb300. The output of the power consumed by the sprinkler pump is controlled by the output of the engine power.

[0028] Preferably, the engine point condition fuel economy optimization process specifically includes the following steps:

[0029] Sc100. Design the optimal water filling point and optimize fuel consumption;

[0030] Sc200 reduces the fuel consumption during parking conditions by optimizing fuel consumption at engine idle speed.

[0031] Preferably, the power consumed by the water pump output in Sb300 is expressed by the following formula:

[0032] P1 / P2 = (n1 / n2) 3

[0033] Wherein: n1 is the first engine speed; n2 is the second engine speed; P1 is the power consumption of the first water pump, which is the power consumption of the water pump at the first engine speed; P2 is the power consumption of the second water pump, which is the power consumption of the water pump at the second engine speed.

[0034] Preferably, the intelligent PTO function specifically includes the following sub-processes:

[0035] The initial entry into the PTO adjustment subprocess includes the following steps:

[0036] After entering PTO for the first time on the Sba100, use the setting button to adjust to the PTO speed desired by the user;

[0037] Sba200. Electrical storage is performed at the PTO speed described in Sba100;

[0038] Sba300. After re-entering PTO, directly increase to the PTO speed saved in Sba200;

[0039] The sub-process for controlling the water outlet valve of a sprinkler truck includes the following steps:

[0040] Sbb100. A PTO switch is connected in series with the water outlet control valve switch of the sprinkler truck.

[0041] Sbb200. When the water truck is operating, monitor the status of the water truck's water outlet control valve switch; then, based on the status of the water truck's water outlet control valve switch, perform the following operations:

[0042] If the water outlet control valve of the sprinkler truck is in the open state, it will automatically return to PTO operation when the vehicle is driven and operated again.

[0043] The sub-process for adjusting manual water spraying volume includes the following steps:

[0044] Sbc100. Collects current actual road conditions;

[0045] Sbc200. The PTO speed is adjusted manually according to the actual road conditions until the PTO speed meets the preset optimal water spraying requirements.

[0046] The idle speed adjustment sub-process specifically includes the following steps:

[0047] Sbd100. Reads the manually preset idle speed adjustment rate from the MCU;

[0048] Sbd200. Adjust the idle speed to a manually preset PTO reference speed according to the idle speed adjustment rate read from Sbd100;

[0049] The driver fatigue reduction subprocess is used in intelligent PTO to reduce driver fatigue while achieving fuel saving.

[0050] Preferably, the driver fatigue reduction sub-process specifically includes the following steps:

[0051] Sbe100. Power take-off (PTO) gear shifting; engine gear shifting;

[0052] Sbe200. Open the outlet valve and activate PTO;

[0053] Sbe300. Based on the current water spraying operation conditions, the following operations are performed:

[0054] If the current watering operation is a manually preset excellent road condition, then execute Sbe400;

[0055] If the current watering operation requires avoiding vehicles and pedestrians, then execute Sbe500;

[0056] If the current watering operation status is red, then execute Sbe600;

[0057] Sbe400: Accelerator pedal is manually controlled; then Sbe700 is executed.

[0058] Sbe500. Apply the brakes, then disengage the PTO.

[0059] Sbe510. Release the brake, and it will automatically enter PTO; then execute Sbe700.

[0060] Sbe600. Depress the clutch to disengage PTO;

[0061] Sbe610. Park the vehicle in place and stop spraying water until the green light;

[0062] Sbe620. Release the clutch, and it will automatically enter PTO; then execute Sbe700.

[0063] Sbe700. Perform water spraying operation until the operation is completed, then close the outlet valve;

[0064] Sbe800. Stop; shutdown;

[0065] Sbe900. PTO set to neutral.

[0066] Preferably, Sc100 specifically includes the following steps;

[0067] Sc110. Collect water filling methods for sprinkler trucks; the water filling methods for sprinkler trucks include high-pressure water injection from fire hydrants, water filling from the tank top, and water pumping.

[0068] Sc120. Based on the water filling method of the sprinkler truck, perform the following operations:

[0069] If the water truck is refilled by high-pressure water injection from the fire hydrant or by water filling from the top of the tank, then the process of Sc100 ends.

[0070] If the water truck is added using the pumping method, then execute Sc130;

[0071] Sc130. Design the optimal water filling point and optimize fuel consumption at the optimal water filling point;

[0072] Sc140. The engine can be operated manually from under the vehicle at the optimal water filling point via remote PTO function.

[0073] Preferably, Sc200 specifically includes the following steps;

[0074] Sc210. Set an idle speed-combustion parameter correspondence table; the idle speed-combustion parameter correspondence table is a manually preset two-dimensional table; the idle speed-combustion parameter correspondence table includes combustion parameters and idle speed; the combustion parameters include engine injection timing, cyclic injection quantity, injection pressure, intake air volume, and EGR rate; each idle speed uniquely corresponds to a set of combustion parameters;

[0075] Sc220. Based on the current water spraying operation conditions, obtain the corresponding current idle speed.

[0076] Sc230. Based on the current idle speed, look up the corresponding combustion parameter in the idle speed-combustion parameter correspondence table;

[0077] Sc240. Execute the combustion parameters.

[0078] Compared with the prior art, the present invention has the following advantages:

[0079] 1. Because this invention uses intelligent PTO to keep the engine running at the optimal speed, it can compensate for the impact of engine thermal management or exhaust gas recirculation on fuel consumption, thus preventing the engine fuel consumption from increasing.

[0080] 2. Because this invention ignores the driver's driving habits, it can effectively constrain the engine to run at high speeds and low loads, which helps to reduce the overall vehicle fuel consumption;

[0081] 3. Since this invention ignores the impact of traffic conditions, its idling fuel consumption also reduces the impact on the fuel consumption of sanitation vehicles, significantly improving fuel efficiency. Attached Figure Description

[0082] Figure 1 This is a schematic diagram of the typical operating conditions of a sanitation sprinkler truck according to a specific embodiment of the present invention;

[0083] Figure 2 This is a schematic diagram illustrating the principle of the EP dual speed regulation characteristic in a specific embodiment of the present invention;

[0084] Figure 3 This is a schematic diagram of the PTO speed control principle in a specific embodiment of the present invention;

[0085] Figure 4 This is a schematic diagram illustrating the working process of the sprinkler truck and the intelligent PTO speed control principle in a specific embodiment of the present invention. Detailed Implementation

[0086] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0087] It should be noted beforehand that, taking into account the operating conditions of sprinkler trucks, a combined fuel consumption optimization method for urban sprinkler trucks based on subdivided operating conditions was designed, as shown in Table 1. Its purpose is to achieve energy conservation and emission reduction.

[0088] Table 1. Optimization Method for Fuel Consumption of Sanitation Sprinkler Trucks

[0089]

[0090] like Figure 1 As shown, a combined fuel consumption optimization method for urban sprinkler trucks based on detailed operating conditions includes the following steps:

[0091] The process for optimizing fuel economy under engine operating conditions is used to design the EP dual speed regulation characteristic curve and optimize the fuel consumption of sprinkler trucks during field transfers.

[0092] In this specific embodiment, the engine surface operating condition fuel economy optimization process specifically includes the following steps:

[0093] Sa100. Design a first speed regulation characteristic curve and a second speed regulation characteristic curve; the first speed regulation characteristic curve corresponds to the engine's P gear; the second speed regulation characteristic curve corresponds to the engine's E gear.

[0094] Sa200 collects the current engine operating conditions; engine operating conditions include normal operating mode and high-speed operating mode.

[0095] Sa300. Based on the collected current engine operating conditions, perform the following operations:

[0096] If the current engine operating condition is detected as normal, then the engine will be set to E gear.

[0097] If the current engine operating condition is detected as high-speed operation, then put the engine in P gear.

[0098] Sa400. Based on the current engine gear, perform the following operations:

[0099] If the engine is currently in P gear, the first speed regulation characteristic curve is used.

[0100] If the engine is currently in gear E, then the second speed regulation characteristic curve is used.

[0101] The engine line operating condition fuel economy optimization process is used to design intelligent PTO function, control the engine to run at a constant speed, and optimize fuel consumption during water spraying operations.

[0102] It should be noted that the specific principle of the engine surface condition fuel economy optimization process is as follows:

[0103] like Figure 2 As shown, the engine operating range of the sprinkler truck is concentrated in the low-to-medium speed and low-to-medium load range. With a fixed vehicle configuration, fuel consumption can be improved by altering the engine's speed regulation characteristic curve. The fuel consumption optimization principle is as follows: With the overall vehicle transmission system configuration unchanged, a first speed regulation characteristic curve and a second speed regulation characteristic curve are designed. The first speed regulation characteristic curve corresponds to the P gear, and the second speed regulation characteristic curve corresponds to the E gear. In normal operating mode, the engine is in E gear, corresponding to the second speed regulation characteristic curve. This allows for a forced shift to a higher gear to transform the original operating point A into operating point B at the same vehicle speed, increasing the load rate and reducing the speed to improve fuel consumption. The second speed regulation characteristic curve can be used for both fully loaded and unloaded transfers. In situations requiring high-speed operation, such as delivery, the engine is in P gear, using the first speed regulation characteristic curve.

[0104] In this specific embodiment, the engine line operating condition fuel economy optimization process specifically includes the following steps:

[0105] Sb100. Put the engine in PTO mode.

[0106] In this specific embodiment, the intelligent PTO function specifically includes the following sub-processes:

[0107] The initial entry into the PTO adjustment subprocess includes the following steps:

[0108] After entering PTO for the first time on the Sba100, use the setting button to adjust to the PTO speed desired by the user.

[0109] Sba200. Electrical storage is performed at the PTO speed of Sba100.

[0110] After re-entering PTO in Sba300, the PTO speed is directly increased to the speed saved in Sba200.

[0111] The sub-process for controlling the water outlet valve of a sprinkler truck includes the following steps:

[0112] Sbb100 is a PTO switch connected in series with the water outlet control valve switch of the sprinkler truck.

[0113] Sbb200. When the water truck is operating, monitor the status of the water truck's water outlet control valve switch; then, based on the status of the water truck's water outlet control valve switch, perform the following operations:

[0114] If the water outlet control valve of the sprinkler truck is in the open position, it will automatically return to PTO operation when the vehicle is driven and operated again.

[0115] The sub-process for adjusting manual water spraying volume includes the following steps:

[0116] Sbc100. Collects current actual road conditions.

[0117] Sbc200. The PTO speed is manually adjusted according to the actual road conditions until the PTO speed meets the preset optimal water spraying requirements.

[0118] The idle speed adjustment sub-process specifically includes the following steps:

[0119] Sbd100 reads the manually preset idle speed adjustment rate from the MCU.

[0120] Sbd200. Adjusts the idle speed to the manually preset PTO reference speed based on the idle speed adjustment rate read from Sbd100.

[0121] It should be noted that the purpose of the idle speed adjustment sub-process is to ensure a smooth speed transition when PTO intervenes.

[0122] The driver fatigue reduction subprocess is used in intelligent PTO to reduce driver fatigue while achieving fuel saving.

[0123] In this specific embodiment, the driver fatigue reduction sub-process includes the following steps:

[0124] Sbe100. Power take-off (PTO) gear shift; engine gear shift.

[0125] Sbe200. Open the outlet valve to activate PTO.

[0126] Sbe300. Based on the current water spraying operation conditions, the following operations are performed:

[0127] If the current watering operation is a manually preset excellent road condition, then execute Sbe400.

[0128] If the current watering operation requires avoiding vehicles and pedestrians, then execute Sbe500.

[0129] If the current watering operation status is red, then execute Sbe600.

[0130] Sbe400. The accelerator pedal is manually controlled; then Sbe700 is executed.

[0131] Sbe500. Apply the brakes, then disengage from the PTO.

[0132] Sbe510. Release the brake, and it will automatically enter PTO; then execute Sbe700.

[0133] Sbe600. Depress the clutch to exit PTO.

[0134] Sbe610. Park the vehicle in place and stop spraying water until the green light.

[0135] Sbe620. Release the clutch, and it will automatically enter PTO; then execute Sbe700.

[0136] Sbe700. Perform water spraying operation until the operation is completed, then close the outlet valve.

[0137] Sbe800. Stop; shut down.

[0138] Sbe900. PTO set to neutral.

[0139] Sb200. In PTO mode, the onboard MCU uses the PTO switch to adjust and set the engine speed, thereby controlling the output of engine power.

[0140] Sb300. The output power of the sprinkler pump is controlled by the output engine power.

[0141] The engine operating condition fuel economy optimization process is used to design the water addition operating condition and optimize fuel consumption to reduce fuel consumption during parking.

[0142] It should be noted that, as Figure 3 As shown, the specific principle of the engine surface condition fuel economy optimization process is as follows:

[0143] PTO (Power Take Off) is a mode that allows the driver to keep the engine running at a constant speed without pressing the accelerator. Once the engine is in PTO mode, the driver uses the PTO switch to adjust and set the engine speed to control the engine power output, thereby achieving vehicle cruising.

[0144] For water sprinkler trucks operating in water-spraying conditions, the PTO (Power Toll-Off) characteristic is used to control the engine speed to a constant level, and the appropriate gear is used to achieve low-speed cruising operation. Water sprinkler trucks operate by using a water pump. The shaft power of the water pump, i.e., the power consumed by the pump, is related to the engine speed. The higher the engine speed, the greater the pump shaft power, the greater the water flow, and the greater the head. By using PTO mode to keep the engine running at its most suitable speed, power consumption and fuel consumption can be effectively reduced. Simultaneously, through hardware and software matching, the PTO speed is within the engine's optimal fuel consumption range, further improving fuel economy during water sprinkler operation.

[0145] In this specific embodiment, the power consumed by the output sprinkler pump in Sb300 is expressed by the following formula:

[0146] Sc100. Design water filling operating point and optimize fuel consumption.

[0147] Sc200. Reduces fuel consumption during parking by optimizing fuel consumption at engine idle, as expressed by formula (1):

[0148] P1 / P2 = (n1 / n2) 3 (1)

[0149] Where: n1 is the first engine speed; n2 is the second engine speed; P1 is the power consumption of the first water pump, which is the power consumption of the water pump at the first engine speed; P2 is the power consumption of the second water pump, which is the power consumption of the water pump at the second engine speed.

[0150] It should be noted that, as Figure 4 As shown, the working principle of each subprocess of Sba100 to Sbe900 is as follows:

[0151] Intelligent PTO (Power Toll-Off) control for the engine was implemented. Sprinkler trucks mostly operate in urban areas with relatively complex road conditions, frequently encountering situations such as waiting at traffic lights, yielding to other vehicles, and avoiding pedestrians. Stopping or braking causes the engine to exit PTO mode. To re-enter PTO mode, the driver needs to press the PTO switch again, which increases driver fatigue and hinders the application of this feature. Based on analysis of the working characteristics of sprinkler trucks, an intelligent PTO feature was developed.

[0152] In this specific embodiment, the engine operating condition fuel economy optimization process specifically includes the following steps:

[0153] Sc100. Design the optimal water filling point and optimize fuel consumption.

[0154] In this specific embodiment, Sc100 specifically includes the following steps.

[0155] Sc110. Collect water filling methods for sprinkler trucks; water filling methods for sprinkler trucks include high-pressure water injection from fire hydrants, water filling from the tank top, and water pumping.

[0156] Sc120. Based on the water filling method of the sprinkler truck, perform the following operations:

[0157] If the water truck is refilled using high-pressure water injection from a fire hydrant or by adding water from the top of the tank, then the Sc100 process ends.

[0158] If the water truck uses pumping to add water, then execute Sc130.

[0159] Sc130. Design the optimal water filling point and optimize fuel consumption at the optimal water filling point.

[0160] Sc140. Through the remote PTO function, the engine can be manually controlled from below the vehicle to operate at the optimal water filling point.

[0161] It should be noted that the principle of Sc100 to Sc140 is to achieve water addition and operation at a specified working point through remote PTO.

[0162] There are several ways to refill water trucks, including high-pressure water injection from fire hydrants, water filling from the tank top, and water pumping from pools or other locations. High-pressure water injection and tank top water filling do not involve engine operation and therefore consume no fuel. Water pumping, however, requires the engine to drive the water pump, resulting in fuel consumption. Therefore, it's crucial to design an optimal water filling point and optimize fuel consumption at that point. Utilizing a remote PTO (Power To Operate) function, the driver can control the engine to operate at this optimal point from below the vehicle, achieving a balance between fuel economy and water filling efficiency.

[0163] Sc200 reduces fuel consumption during parking by optimizing fuel consumption at engine idle.

[0164] In the process of optimizing fuel economy under engine operating conditions, water is added remotely via PTO to operate at a specified operating point, and fuel consumption under parking conditions is reduced by optimizing fuel consumption at engine idling.

[0165] In this specific embodiment, Sc200 specifically includes the following steps.

[0166] Sc210. Set an idle speed-combustion parameter correspondence table; the idle speed-combustion parameter correspondence table is a manually preset two-dimensional table; the idle speed-combustion parameter correspondence table includes combustion parameters and idle speed; the combustion parameters include engine injection timing, cyclic injection quantity, injection pressure, intake air volume, and EGR rate; each idle speed uniquely corresponds to a set of combustion parameters.

[0167] Sc220. Obtain the current idle speed based on the current water spraying operation conditions.

[0168] Sc230. Based on the current idle speed, find the corresponding combustion parameters in the idle speed-combustion parameter correspondence table.

[0169] Sc240. Execute combustion parameters.

[0170] It should be noted that the principle behind Sc200 to Sc240 is as follows: When sanitation sprinkler trucks operate in cities, they often stop to wait for traffic lights and avoid pedestrians, resulting in a long engine idling time, which generally accounts for more than 20% of the total fuel consumption. This increases the proportion of idling fuel consumption in the total fuel consumption. By designing a suitable idling speed and matching reasonable combustion parameters, the idling fuel economy can be improved, and the fuel consumption during parking can be reduced.

[0171] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features of the single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the invention.

[0172] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0173] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0174] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions, characterized in that: Includes the following process: The process for optimizing fuel economy under engine operating conditions is used to design the EP dual speed regulation characteristic curve and optimize the fuel consumption of sprinkler trucks during relocation. The engine line operating condition fuel economy optimization process is used to design intelligent PTO function, control the engine to run at a constant speed, and optimize fuel consumption during water spraying operations. The engine operating condition fuel economy optimization process is used to design the water addition operating condition and optimize fuel consumption to reduce fuel consumption during parking. The intelligent PTO function specifically includes the following sub-processes: The initial entry into the PTO adjustment subprocess includes the following steps: Sba100. After entering PTO for the first time, use the setting button to adjust to the PTO speed as desired by the user; Sba200. Electrical storage is performed at the PTO speed described in Sba100; Sba300. After re-entering PTO, directly increase to the PTO speed saved in Sba200; The sub-process for controlling the water outlet valve of a sprinkler truck includes the following steps: Sbb100. A PTO switch is connected in series with the water outlet control valve switch of the sprinkler truck; Sbb200. When the water truck is operating, monitor the status of the water truck's water outlet control valve switch; then, based on the status of the water truck's water outlet control valve switch, perform the following operations: If the water outlet control valve of the sprinkler truck is in the open state, it will automatically return to PTO operation when the vehicle is driven and operated again. The sub-process for adjusting manual water spraying volume includes the following steps: Sbc100. Collects current actual road conditions; Sbc200. The PTO speed is adjusted manually according to the actual road conditions until the PTO speed meets the optimal water spraying requirement preset by the operator. The idle speed adjustment sub-process specifically includes the following steps: Sbd100. Reads the manually preset idle speed adjustment rate from the MCU; Sbd200. Adjust the idle speed to a manually preset PTO reference speed based on the idle speed adjustment rate read from Sbd100; The driver fatigue reduction subprocess is used in intelligent PTO to reduce driver fatigue while achieving fuel saving.

2. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 1, characterized in that: In the engine point condition fuel economy optimization process, water is added remotely via PTO to operate at a specified point, and the fuel consumption during parking is reduced by optimizing the fuel consumption at the engine idle point.

3. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 2, characterized in that: The engine surface condition fuel economy optimization process specifically includes the following steps: Sa100. Design a first speed regulation characteristic curve and a second speed regulation characteristic curve; the first speed regulation characteristic curve corresponds to the engine's P gear; the second speed regulation characteristic curve corresponds to the engine's E gear; Sa200. Collects current engine operating conditions; these engine operating conditions include normal operating mode and high-speed operating mode. Sa300. Based on the current engine operating conditions collected, perform the following operations: If the current engine operating condition is the normal operating mode, then the engine is set to E gear; If the current engine operating condition is the high-speed operating mode, then the engine is placed in P gear; Sa400. Based on the current engine gear, perform the following operations: If the engine is currently in P gear, then the first speed regulation characteristic curve is used; If the engine is currently in gear E, then the second speed regulation characteristic curve is used.

4. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 3, characterized in that: The engine line operating condition fuel economy optimization process specifically includes the following steps: Sb100. Put the engine in PTO mode; Sb200. In the PTO mode, the on-board MCU uses the PTO switch to adjust and set the engine speed, thereby controlling the output of engine power; Sb300. The output of the power consumed by the sprinkler pump is controlled by the output of the engine power.

5. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 4, characterized in that: The engine point operating condition fuel economy optimization process specifically includes the following steps: Sc100. Design the optimal water filling point and optimize fuel consumption; Sc200. Reduces fuel consumption during parking conditions by optimizing fuel consumption at engine idle speed.

6. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 5, characterized in that: The power consumed by the water pump output in Sb300 is expressed by the following formula: P1 / P2=(n1 / n2) 3 Wherein: n1 is the first engine speed; n2 is the second engine speed; P1 is the power consumption of the first water pump, which is the power consumption of the water pump at the first engine speed; P2 is the power consumption of the second water pump, which is the power consumption of the water pump at the second engine speed.

7. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 6, characterized in that: The driver fatigue reduction sub-process specifically includes the following steps: Sbe100. Power take-off (PTO) gear shifting; engine gear shifting; Sbe200. Open the outlet valve to activate PTO; Sbe300. Based on the current watering operation conditions, perform the following operations: If the current watering operation is a manually preset excellent road condition, then execute Sbe400; If the current watering operation requires avoiding vehicles and pedestrians, then execute Sbe500; If the current watering operation status is red, then execute Sbe600; Sbe400. The accelerator pedal is manually controlled; then Sbe700 is executed; Sbe500. Apply the brakes, then disengage the PTO. Sbe510. Release the brake, and it will automatically enter PTO; then execute Sbe700; Sbe600. Depress the clutch to disengage PTO; Sbe610. Park the vehicle in place, stop the water spraying, and wait for the green light; Sbe620. Release the clutch, automatically enter PTO; then execute Sbe700; Sbe700. Perform water spraying operation until the operation is completed, then close the outlet valve; Sbe800. Shutdown; shutdown; Sbe900. PTO in neutral.

8. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 7, characterized in that: Sc100 specifically includes the following steps; Sc110. Collect water filling methods for sprinkler trucks; the water filling methods for sprinkler trucks include high-pressure water injection from fire hydrants, water filling from the tank top, and water pumping. Sc120. Based on the water filling method of the sprinkler truck, perform the following operations: If the water truck is refilled by high-pressure water injection from the fire hydrant or by water filling from the top of the tank, then the process of Sc100 ends. If the water truck is added using the pumping method, then execute Sc130; Sc130. Design the optimal water filling point and optimize fuel consumption at the optimal water filling point; Sc140. The engine can be operated manually from under the vehicle at the optimal water filling point via remote PTO function.

9. The method for optimizing combined fuel consumption of urban sprinkler trucks based on detailed operating conditions according to claim 8, characterized in that: Sc200 specifically includes the following steps; Sc210. Set an idle speed-combustion parameter correspondence table; the idle speed-combustion parameter correspondence table is a manually preset two-dimensional table; the idle speed-combustion parameter correspondence table includes combustion parameters and idle speed; the combustion parameters include engine injection timing, cyclic injection quantity, injection pressure, intake air volume, and EGR rate; each idle speed uniquely corresponds to a set of combustion parameters; Sc220. Based on the current water spraying operation conditions, obtain the corresponding current idle speed. Sc230. Based on the current idle speed, look up the corresponding combustion parameter in the idle speed-combustion parameter correspondence table; Sc240. Execute the combustion parameters.

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