Power control method and device of diesel engine range extender, electronic equipment and vehicle
By determining the engine speed and torque based on vehicle speed and pedal signals in the diesel engine range extender and adjusting the generator output power, the problem of uneven energy consumption and emissions in the diesel engine range extender system is solved, achieving more efficient energy utilization and emission control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIQI FOTON MOTOR CO LTD
- Filing Date
- 2023-10-30
- Publication Date
- 2026-07-14
AI Technical Summary
The control strategies of existing diesel engine range extender systems cannot effectively balance energy consumption and emissions, resulting in energy waste when the vehicle's power demand is low or increased fuel consumption and poor emissions during dynamic processes.
The required power of the vehicle is determined based on the vehicle's speed, battery charge, accelerator pedal signal, and brake pedal signal. The engine operating speed is set to correspond to the vehicle speed range. The power output of the range extender is controlled by adjusting the generator torque to achieve a balance of the pre-selected power.
This avoids the energy waste caused by diesel engines operating at high operating points, reduces high emissions caused by frequent changes in speed and torque, and achieves a balance between energy consumption and emissions.
Smart Images
Figure CN117622090B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of vehicles, and more specifically, to a power control method, apparatus, electronic equipment, and vehicle for a diesel engine range extender. Background Technology
[0002] Range-extended electric vehicles (REEVs) can contribute to energy conservation and emission reduction, and the application of diesel engine range extenders is becoming increasingly widespread. Maintaining the diesel engine at specific speeds and output torques can ensure high thermal efficiency, balancing emissions and fuel consumption. Current technologies primarily employ single-point control and optimal fuel economy curve control strategies for diesel engine range extender systems. In single-point control, the diesel engine needs to be set at a high power output point, resulting in higher engine noise and energy waste when the vehicle's power demand is low. In optimal fuel economy curve control, the engine's speed and torque fluctuate frequently, leading to increased fuel consumption during dynamic processes compared to static conditions, and the frequent changes in operating points negatively impact emissions. Therefore, determining a power control method for range extenders that balances energy consumption and emissions is a pressing issue. Summary of the Invention
[0003] The purpose of this disclosure is to provide a power control method, apparatus, electronic equipment, and vehicle for a diesel engine range extender to solve the aforementioned technical problems.
[0004] According to a first aspect of the present disclosure, a power control method for a diesel engine range extender is provided, the method comprising:
[0005] The required power of the vehicle is determined based on one or more of the following: vehicle speed, battery charge, accelerator pedal signal, and brake pedal signal.
[0006] When the required power of the vehicle is greater than zero, the operating speed of the engine in the range extender is determined according to the vehicle speed range in which the driving speed is located; wherein, multiple vehicle speed ranges are preset, and each of the multiple vehicle speed ranges corresponds to a different engine operating speed.
[0007] The pre-selected power of the range extender is obtained according to the engine's operating speed;
[0008] By adjusting the torque of the generator in the range extender, the range extender is controlled to output power according to the pre-selected power.
[0009] Optionally, determining the operating speed of the engine in the range extender based on the vehicle speed range includes:
[0010] When the vehicle speed is within the first speed range, the engine operating speed is determined to be the first speed.
[0011] When the vehicle speed is within the second speed range, the engine operating speed is determined to be the second speed.
[0012] When the vehicle speed is within the third speed range, the engine operating speed is determined to be the third speed.
[0013] Wherein, the vehicle speed in the first speed range is less than the vehicle speed in the second speed range, the vehicle speed in the second speed range is less than the vehicle speed in the third speed range, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.
[0014] Optionally, the method further includes:
[0015] When a preset operating condition occurs during the vehicle's operation, the torque of the generator in the range extender is adjusted to increase the output power of the range extender; wherein, the preset operating condition includes vehicle acceleration within the vehicle speed range or vehicle climbing a hill.
[0016] Optionally, the method further includes:
[0017] When the required power of the entire vehicle is zero, the range extender is controlled to output power according to the set power.
[0018] Optionally, the method further includes:
[0019] Compare the pre-selected power of the range extender with the required power of the vehicle;
[0020] If the pre-selected power of the range extender is greater than the required power of the vehicle, the remaining power after subtracting the required power of the vehicle from the pre-selected power is transmitted to the power battery to charge the power battery.
[0021] If the pre-selected power of the range extender is less than the required power of the vehicle, the power battery outputs power according to the power difference between the pre-selected power and the required power of the vehicle to meet the power requirements of the vehicle.
[0022] Optionally, the method further includes:
[0023] During the operation of the range extender, the carbon load of the diesel particulate filter is monitored by a carbon load monitoring device.
[0024] When the carbon load is greater than a set threshold, the operating speed of the range extender's engine is obtained;
[0025] When the engine's operating speed is greater than or equal to a set speed value, the regeneration mode of the diesel particulate filter is activated;
[0026] If the engine's operating speed is lower than the set speed value, the engine's operating speed will be increased to the set speed value.
[0027] Keeping the pre-selected power of the range extender unchanged, the target torque of the generator in the range extender is determined according to the set speed value;
[0028] After adjusting the generator torque to the target torque, the regeneration mode of the diesel particulate filter is activated.
[0029] Optionally, the method further includes:
[0030] When the vehicle is under braking control, the braking method of the vehicle is determined based on the vehicle's power battery charge, driving speed, braking degree, and maximum torque of the drive motor.
[0031] According to a second aspect of the present disclosure, a power control device for a diesel engine range extender is provided, the device comprising:
[0032] The determination module is used to determine the required power of the vehicle based on one or more of the following: vehicle speed, power battery charge, accelerator pedal signal, and brake pedal signal.
[0033] The determining module is further configured to determine the operating speed of the engine in the range extender based on the vehicle speed range in which the driving speed is located when the total vehicle power demand is greater than zero; wherein, multiple vehicle speed ranges are preset, and the multiple vehicle speed ranges correspond to multiple different engine operating speeds;
[0034] The acquisition module is used to acquire the pre-selected power of the range extender according to the operating speed of the engine;
[0035] The control module is used to control the range extender to output power according to the preset power by adjusting the torque of the generator in the range extender.
[0036] According to a third aspect of the present disclosure, an electronic device is provided, comprising:
[0037] A memory on which computer programs are stored;
[0038] A processor for executing the computer program in the memory to implement the steps of the method according to any one of the first aspects of this disclosure.
[0039] According to a fourth aspect of the present disclosure, a vehicle is provided, including a diesel engine range extender and the electronic equipment described in the third aspect of the present disclosure.
[0040] In the above technical solution, the vehicle's required power is first determined based on one or more of the following: vehicle speed, battery charge, accelerator pedal signal, and brake pedal signal. When the required power is greater than zero, the operating speed of the engine in the range extender is determined according to the vehicle speed range. Multiple vehicle speed ranges are pre-set, each corresponding to a different engine operating speed. The pre-selected power of the range extender is then obtained based on the engine's operating speed. By adjusting the torque of the generator in the range extender, the range extender is controlled to output power according to the pre-selected power. This technical solution allows the pre-selected power of the range extender to be determined based on the vehicle speed when the vehicle has a power requirement. This avoids energy waste caused by continuously operating the diesel engine at a high output point and also avoids high emissions caused by frequent changes in engine speed and torque. This power control method for diesel engine range extenders can balance energy consumption and emissions.
[0041] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0042] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0043] Figure 1 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment.
[0044] Figure 2 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment.
[0045] Figure 3 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment.
[0046] Figure 4 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment.
[0047] Figure 5 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment.
[0048] Figure 6 This is a block diagram illustrating a power control device for a diesel engine range extender according to an exemplary embodiment.
[0049] Figure 7 This is a block diagram illustrating an electronic device 700 according to an exemplary embodiment.
[0050] Figure 8 This is a block diagram illustrating a vehicle 800 according to an exemplary embodiment. Detailed Implementation
[0051] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0052] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.
[0053] With the continuous upgrading of vehicle emission standards, range-extended electric vehicles can play a significant role in energy conservation and emission reduction. For diesel vehicles, with the implementation of relevant regulations and standards, the NO emissions... x The levels of nitrogen oxides (NOx) and particulate matter have decreased significantly. However, with the upgrading of emission control, the control of diesel engine fuel consumption is subject to many limitations due to vehicle driving conditions and road scenarios. To further explore the thermal efficiency potential of small diesel engines, the applicant discovered that if the diesel engine is maintained at a specific speed and output torque, its high thermal efficiency can be maintained. By controlling its speed and torque switching in conjunction with external energy demand, both emissions and fuel consumption can be considered simultaneously. Therefore, diesel engine range extenders have become an optional path for energy conservation and emission reduction. However, how to determine a power control method for range extenders that can balance energy consumption and emissions has become an urgent problem to be solved. To solve this problem, this disclosure provides a power control method for diesel engine range extenders.
[0054] Figure 1 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment, such as... Figure 1 As shown, the method includes the following steps.
[0055] In step S11, the required power of the vehicle is determined based on one or more of the following: vehicle speed, power battery charge, accelerator pedal signal, and brake pedal signal.
[0056] In this embodiment, the vehicle may be a hybrid vehicle using a diesel engine range extender. The vehicle may include a diesel engine range extender, a drive motor, and a power battery. The diesel engine range extender typically includes an engine and a generator. The engine works by burning diesel fuel and drives the generator to charge the power battery. The power battery is used to power the drive motor. The drive motor can drive the vehicle independently, or it can drive the vehicle together with the engine, or it can drive the vehicle independently by the engine. The actual situation depends on the driving mode supported by the vehicle and the driver's choice. This embodiment does not impose any restrictions.
[0057] When the application scenario involves vehicles with heavy loads, such as commercial or engineering vehicles, the range extender requires a high-power engine. For example, existing light trucks and heavy-duty pickup trucks can use engines with a power output of 60-80kW as range extenders. Additionally, the battery charge refers to the battery's SOC (State of Charge), which reflects the remaining charge of the battery.
[0058] In step S12, when the total power demand of the vehicle is greater than zero, the operating speed of the engine in the range extender is determined according to the vehicle speed range in which the driving speed is located; wherein, multiple vehicle speed ranges are preset, and the multiple vehicle speed ranges correspond to multiple different engine operating speeds.
[0059] The required power of the entire vehicle can be determined based on parameters such as vehicle speed, battery charge, accelerator pedal signal, and brake pedal signal as described in step S11. When the required power of the entire vehicle is greater than zero, power output is required through the range extender; when the required power of the entire vehicle is zero, the output power of the range extender can be fixed at a set value, for example, 10kW. Furthermore, it can be understood that whether the range extender is activated can be determined by the state of charge (SOC) of the battery. For example, when SOC < SOC low The range extender activates when SOC ≥ SOC. low In this case, the range extender shuts down; wherein, the SOC low The value can be 0.4.
[0060] In step S13, the pre-selected power of the range extender is obtained according to the engine's operating speed.
[0061] For example, the power with optimal fuel economy can be obtained from the universal curve based on the operating speed as the preselected power.
[0062] The power control method for a diesel engine range extender disclosed herein sets the pre-selected power of the range extender to follow the demand power. That is, when the vehicle's demand power is high, the pre-selected power of the range extender is also relatively high; when the vehicle's demand power is low, the pre-selected power of the range extender is also relatively low. For example, when the vehicle speed is high, the vehicle's demand power is high, and the range extender needs to output more power, i.e., the pre-selected power is high, corresponding to the diesel engine operating at a higher speed. When the vehicle speed is low, the vehicle's demand power decreases, and the power output of the range extender needs to decrease, i.e., the pre-selected power is low, corresponding to the diesel engine operating at a lower speed. It can be understood that this power control method can achieve a correspondence between the diesel engine speed and the vehicle's demand power.
[0063] In step S14, by adjusting the torque of the generator in the range extender, the range extender is controlled to output power according to the pre-selected power.
[0064] Understandably, once the diesel engine speed and pre-selected power of the range extender are determined, the generator torque needs to be adjusted in order to output power according to the pre-selected power.
[0065] In the above technical solution, the vehicle's required power is first determined based on one or more of the following: vehicle speed, battery charge, accelerator pedal signal, and brake pedal signal. When the required power is greater than zero, the operating speed of the engine in the range extender is determined according to the vehicle speed range. Multiple vehicle speed ranges are pre-set, each corresponding to a different engine operating speed. The pre-selected power of the range extender is then obtained based on the engine's operating speed. By adjusting the torque of the generator in the range extender, the range extender is controlled to output power according to the pre-selected power. This technical solution allows the pre-selected power of the range extender to be determined based on the vehicle speed when the vehicle has a power requirement. This avoids energy waste caused by continuously operating the diesel engine at a high output point and also avoids high emissions caused by frequent changes in engine speed and torque. This power control method for diesel engine range extenders can balance energy consumption and emissions.
[0066] In one possible implementation, the pre-set vehicle speed range mentioned in step S12 above can be: 0 < V1 ≤ 50 km / h, 50 < V2 ≤ 80 km / h and V3 > 80 km / h, and these three vehicle speed ranges can correspond to three different engine speeds n1, n2 and n3 respectively.
[0067] It is understandable that the pre-selected power P of the range extender can be obtained based on the engine's operating speed. re For example, engine speeds n1, n2, and n3 can each correspond to a pre-selected power P. re1P re2 and P re3 The preselected power P re1 P re2 and P re3 The value can be determined based on the power with optimal fuel economy on the universal curve. Additionally, this pre-selected power value can be adjusted according to vehicle type; for example, for small vehicles, the ranges for the three values can be: 10kW < P re1 ≤20KW; 20kW<P re1 ≤30KW; 50kW<P re1 ≤60KW. For large vehicles, the pre-selected power value should be increased accordingly.
[0068] Figure 2 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment, such as... Figure 2 As shown, the step S12 above, which involves determining the operating speed of the engine in the range extender based on the vehicle speed range, may include the following steps:
[0069] Step S121: If the vehicle speed is within the first speed range, determine the engine's operating speed as the first speed.
[0070] Step S122: If the vehicle speed is within the second speed range, determine the engine's operating speed as the second speed.
[0071] Step S123: If the vehicle speed is within the third speed range, determine the engine's operating speed as the third speed.
[0072] Wherein, the vehicle speed in the first speed range is less than the vehicle speed in the second speed range, the vehicle speed in the second speed range is less than the vehicle speed in the third speed range, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.
[0073] For example, suppose the first speed range is 0 < V1 ≤ 50 km / h, corresponding to the first engine speed n1; the second speed range is 50 < V2 ≤ 80 km / h, corresponding to the second engine speed n2; and the third speed range is V3 > 80 km / h, corresponding to the third engine speed n3, where n1 < n2 < n3. If the vehicle's current speed is 60 km / h, then it can be determined that the speed falls within the second speed range, thus determining the engine's operating speed as n2.
[0074] Optionally, the power control method of the diesel engine range extender may further include: adjusting the torque of the generator in the range extender to increase the output power of the range extender when a preset operating condition occurs during the vehicle's operation; wherein the preset operating condition includes vehicle acceleration within the speed range or vehicle climbing.
[0075] Understandably, when a vehicle accelerates or climbs a hill, the power demand of the entire vehicle increases, requiring an increase in the output power of the range extender. This can be achieved by increasing the torque of the generator to increase the output power of the range extender.
[0076] Optionally, the method may further include: controlling the range extender to output power according to a set power when the total power demand of the vehicle is zero.
[0077] For example, when the vehicle's power demand is zero, the range extender's output power can be fixed at a set value, such as 10kW.
[0078] Figure 3 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment, such as... Figure 3 As shown, the method may further include the following steps:
[0079] Step S15: Compare the pre-selected power of the range extender with the required power of the vehicle.
[0080] Step S16: If the pre-selected power of the range extender is greater than the required power of the vehicle, the remaining power after subtracting the required power of the vehicle from the pre-selected power is transmitted to the power battery for charging the power battery.
[0081] Step S17: If the pre-selected power of the range extender is less than the required power of the vehicle, the power battery outputs power according to the power difference between the pre-selected power and the required power of the vehicle to meet the power requirements of the vehicle.
[0082] For example, the power requirement of the entire vehicle can be represented by P. req This indicates that the pre-selected power P of the range extender will be... re and the power demand of the whole vehicle P req By comparison, it is understandable that when P re >P req This indicates that the output power of the diesel engine range extender can meet the needs of the entire vehicle, and P re -P req Afterwards, the remaining power can be used to charge the power battery; when P re >P reqIf the output power of the diesel engine range extender is insufficient to meet the vehicle's power requirements, then the power battery needs to provide power output to satisfy the vehicle's power demands. The power output value P of the power battery is... ess_out =P req -P re .
[0083] In another possible implementation, the method may further include:
[0084] When the vehicle is under braking control, the braking method is determined based on the vehicle's power battery charge, driving speed, braking degree, and maximum torque of the drive motor.
[0085] The braking method may include the following:
[0086] (1) When the power battery charge is greater than or equal to the charge threshold, the braking method of the vehicle is determined to be friction braking;
[0087] (2) When the power battery charge is less than the charge threshold and the vehicle speed is less than the speed threshold, the braking method of the vehicle is determined to be friction braking.
[0088] (3) When the power battery charge is less than the charge threshold, the vehicle speed is greater than or equal to the vehicle speed threshold, and the braking degree is greater than or equal to the set value, the braking method of the vehicle is determined to be friction braking.
[0089] (4) When the power battery charge is less than the charge threshold, the vehicle speed is greater than or equal to the vehicle speed threshold, the braking degree is less than the set value, and the maximum torque of the drive motor is greater than or equal to the braking torque required, the braking method of the vehicle is determined to be motor braking.
[0090] (5) When the power battery charge is less than the charge threshold, the vehicle speed is greater than or equal to the vehicle speed threshold, the braking degree is less than the set value, and the maximum torque of the drive motor is less than the braking torque required, the braking method of the vehicle is determined to be a hybrid braking method of motor braking combined with friction braking.
[0091] The degree of braking can be represented by Z, which ranges from [0,1]. For example, 0 represents no braking, 1 represents full braking, the degree of braking is 100%, and 0.5 represents the degree of braking is 50%. Z can be obtained based on the vehicle's brake pedal signal.
[0092] For example, when the vehicle's power demand is zero and the vehicle is under braking control, the system first determines the relationship between the battery's State of Charge (SOC) and a charge threshold. For instance, the charge threshold could be 0.9. If SOC ≥ 0.9, braking is performed using mechanical braking, i.e., friction braking. If SOC < 0.9, the system determines the relationship between the vehicle speed and a speed threshold, which could be set to 15 km / h. If the vehicle speed V < 15 km / h, braking is also performed using friction braking. If SOC < 0.9 and the vehicle speed V ≥ 15 km / h, the system determines the braking degree Z. If Z ≥ 0.7, braking is performed using friction braking. If Z < 0.7, the system determines the required braking torque T. b-req and the maximum torque T of the drive motor n-max The relationship, if T b-req ≤T n-max Braking is achieved through motor braking; if T b-req >T n-max Braking is achieved through a hybrid braking method that combines motor braking with friction braking.
[0093] Diesel range extenders, like traditional diesel engines, emit large amounts of NO. x (Nitrogen oxides) and particulate matter, among which the treatment of particulate matter requires a special diesel particulate filter (DPF). Figure 4 This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment, such as... Figure 4 As shown, the method may further include the following steps:
[0094] Step S18: During the operation of the range extender, the carbon load of the diesel particulate filter is monitored by a carbon load monitoring device.
[0095] Understandably, since particulate matter is continuously generated during the operation of this range extender, it is necessary to monitor the carbon load of the DPF in real time. For example, a carbon load monitoring device can determine whether the carbon load exceeds the limit by judging the pressure difference across the DPF hardware.
[0096] Step S19: If the carbon load is greater than a set threshold, the diesel particulate filter is regenerated.
[0097] It is understandable that if the particulate matter continuously generated during the operation is not treated, it will cause blockage of the DPF hardware. DPF regeneration refers to the process of oxidizing particulate matter into a gaseous state through heating and combustion. In this process, it is necessary to increase the exhaust pipe temperature and ignite the particulate matter through high temperature.
[0098] Optionally, Figure 5This is a flowchart illustrating a power control method for a diesel engine range extender according to an exemplary embodiment, such as... Figure 5 As shown, step S19, which involves regenerating the diesel particulate filter when the carbon load exceeds a set threshold, may include the following steps:
[0099] Step S191: When the engine's operating speed is greater than or equal to the set speed value, the regeneration mode of the diesel particulate filter is activated.
[0100] Step S192: If the engine's operating speed is lower than the set speed value, increase the engine's operating speed to the set speed value.
[0101] Step S193: Keep the pre-selected power of the range extender unchanged, and determine the target torque of the generator in the range extender according to the set speed value.
[0102] Step S194: After adjusting the torque of the generator to the target torque, start the regeneration mode of the diesel particulate filter.
[0103] Understandably, DPF regeneration requires a certain exhaust flow rate and temperature. For lower power ranges, more fuel is needed to reach the DPF regeneration temperature. Therefore, when a diesel range extender performs DPF regeneration, the engine needs to operate at a higher speed to protect the DPF hardware and save fuel. During DPF regeneration, the engine speed is generally required to be higher than a set speed, for example, 2000 rpm.
[0104] When the engine speed is ≥2000r / min, the regeneration mode of the diesel particulate filter can be directly started to regenerate the DPF; when the engine speed is <2000r / min, the engine speed needs to be increased to 2000r / min before starting the regeneration mode.
[0105] For example, since P = T*n / 9550 (P is the engine's output power in kW; T is the generator's output torque in N·m; n is the engine's operating speed in r / min; 9550 is a constant used for unit conversion), when the engine's operating speed increases from low to high, if the torque remains the same, it will lead to an increase in the range extender's actual output power. Therefore, to maintain the range extender's pre-selected power unchanged, it is necessary to adjust the generator torque, i.e., by adjusting T... target =9550*P re / n is used to calculate the target torque of the generator, where n is the engine speed after the increase.
[0106] In the above technical solution, the vehicle's required power is first determined based on one or more of the following: vehicle speed, battery charge, accelerator pedal signal, and brake pedal signal. When the required power is greater than zero, the operating speed of the engine in the range extender is determined according to the vehicle speed range. Multiple vehicle speed ranges are pre-set, each corresponding to a different engine operating speed. The pre-selected power of the range extender is then obtained based on the engine's operating speed. By adjusting the torque of the generator in the range extender, the range extender is controlled to output power according to the pre-selected power. This technical solution allows the pre-selected power of the range extender to be determined based on the vehicle speed when the vehicle has a power requirement. This avoids energy waste caused by continuously operating the diesel engine at a high output point and also avoids high emissions caused by frequent changes in engine speed and torque. This power control method for diesel engine range extenders can balance energy consumption and emissions.
[0107] Figure 6 This is a block diagram illustrating a power control device for a diesel engine range extender according to an exemplary embodiment, such as... Figure 6 As shown, the device 600 includes: a determining module 610, an acquiring module 620, and a control module 630;
[0108] The determining module 610 is used to determine the required power of the vehicle based on one or more of the vehicle's driving speed, power battery charge, accelerator pedal signal, and brake pedal signal.
[0109] The determining module 610 is also used to determine the operating speed of the engine in the range extender based on the vehicle speed range in which the driving speed is located when the total power demand of the vehicle is greater than zero; wherein, multiple vehicle speed ranges are preset, and the multiple vehicle speed ranges correspond to multiple different engine operating speeds respectively.
[0110] The acquisition module 620 is used to acquire the pre-selected power of the range extender based on the engine's operating speed.
[0111] The control module 630 is used to control the range extender to output power according to the pre-selected power by adjusting the torque of the generator in the range extender.
[0112] Optionally, the determining module 610 is also used for:
[0113] When the vehicle speed falls within the first speed range, the engine's operating speed is determined to be the first speed.
[0114] If the vehicle speed falls within the second speed range, the engine's operating speed is determined to be the second speed.
[0115] When the vehicle speed falls within the third speed range, the engine's operating speed is determined to be the third speed.
[0116] Wherein, the vehicle speed in the first speed range is less than the vehicle speed in the second speed range, the vehicle speed in the second speed range is less than the vehicle speed in the third speed range, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.
[0117] Optionally, the device 600 further includes an adjustment module for:
[0118] When a preset operating condition occurs during the vehicle's operation, the torque of the generator in the range extender is adjusted to increase the output power of the range extender; wherein, the preset operating condition includes vehicle acceleration within the speed range or vehicle climbing.
[0119] Optionally, the control module 630 is also used for:
[0120] When the vehicle's power requirement is zero, the range extender is controlled to output power according to the set power.
[0121] Optionally, the power control device 600 of the diesel engine range extender further includes: a comparison module, a power transmission module, and a power output module;
[0122] This comparison module is used to compare the pre-selected power of the range extender with the required power of the entire vehicle;
[0123] The power transmission module is used to transmit the remaining power after subtracting the vehicle's required power from the pre-selected power of the range extender to the power battery for charging the power battery when the pre-selected power of the range extender is greater than the required power of the vehicle.
[0124] The power output module is used to output power through the power battery according to the power difference between the pre-selected power and the required power of the vehicle when the pre-selected power of the range extender is less than the required power of the vehicle, so as to meet the power requirements of the vehicle.
[0125] Optionally, the power control device 600 of the diesel engine range extender further includes: a monitoring module and a regeneration module;
[0126] This monitoring module is used to monitor the carbon load of the diesel particulate filter through a carbon load monitoring device during the operation of the range extender.
[0127] This regeneration module is used for:
[0128] When the carbon load is greater than a set threshold, the operating speed of the range extender's engine is obtained;
[0129] When the engine's operating speed is greater than or equal to a set speed value, the regeneration mode of the diesel particulate filter is activated;
[0130] If the engine's operating speed is lower than the set speed value, the engine's operating speed will be increased to the set speed value.
[0131] Keeping the pre-selected power of the range extender unchanged, the target torque of the generator in the range extender is determined according to the set speed value;
[0132] After adjusting the generator torque to the target torque, the regeneration mode of the diesel particulate filter is activated.
[0133] Optionally, the determining module 610 is also used for:
[0134] When the vehicle is under braking control, the braking method is determined based on the vehicle's power battery charge, driving speed, braking degree, and maximum torque of the drive motor.
[0135] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.
[0136] Figure 7 This is a block diagram illustrating an electronic device 700 according to an exemplary embodiment. Figure 7 As shown, the electronic device 700 may include a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.
[0137] The processor 701 controls the overall operation of the electronic device 700 to complete all or part of the steps in the power control method for the diesel engine range extender described above. The memory 702 stores various types of data to support the operation of the electronic device 700. This data may include, for example, instructions for any application or method operating on the electronic device 700, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 702 or transmitted via communication component 705. The audio component also includes at least one speaker for outputting audio signals. I / O interface 704 provides an interface between processor 701 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 705 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.
[0138] In an exemplary embodiment, the electronic device 700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the power control method of the diesel engine range extender described above.
[0139] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the power control method for the diesel engine range extender described above. For example, the computer-readable storage medium may be the memory 702 including program instructions described above, which may be executed by the processor 701 of the electronic device 700 to complete the power control method for the diesel engine range extender described above.
[0140] Figure 8 This is a block diagram illustrating a vehicle 800 according to an exemplary embodiment, such as... Figure 8 As shown, the vehicle 800 includes: a diesel engine range extender 100 and the aforementioned electronic equipment 700.
[0141] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0142] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0143] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A power control method for a diesel engine range extender, characterized in that, The method includes: The required power of the vehicle is determined based on one or more of the following: vehicle speed, battery charge, accelerator pedal signal, and brake pedal signal. When the required power of the vehicle is greater than zero, the operating speed of the engine in the range extender is determined according to the vehicle speed range in which the driving speed is located; wherein, multiple vehicle speed ranges are preset, and each of the multiple vehicle speed ranges corresponds to a different engine operating speed. Based on the engine's operating speed, the power with optimal fuel economy is obtained from the universal curve and used as the pre-selected power of the corresponding range extender. By adjusting the torque of the generator in the range extender, the range extender is controlled to output power according to the pre-selected power.
2. The method according to claim 1, characterized in that, Determining the operating speed of the engine in the range extender based on the vehicle speed range includes: When the vehicle speed is within the first speed range, the engine operating speed is determined to be the first speed. When the vehicle speed is within the second speed range, the engine operating speed is determined to be the second speed. When the vehicle speed is within the third speed range, the engine operating speed is determined to be the third speed. Wherein, the vehicle speed in the first speed range is less than the vehicle speed in the second speed range, the vehicle speed in the second speed range is less than the vehicle speed in the third speed range, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.
3. The method according to claim 1, characterized in that, The method further includes: When a preset operating condition occurs during the vehicle's operation, the torque of the generator in the range extender is adjusted to increase the output power of the range extender; wherein, the preset operating condition includes vehicle acceleration within the vehicle speed range or vehicle climbing a hill.
4. The method according to claim 1, characterized in that, The method further includes: When the required power of the entire vehicle is zero, the range extender is controlled to output power according to the set power.
5. The method according to claim 1, characterized in that, The method further includes: Compare the pre-selected power of the range extender with the required power of the vehicle; If the pre-selected power of the range extender is greater than the required power of the vehicle, the remaining power after subtracting the required power of the vehicle from the pre-selected power is transmitted to the power battery to charge the power battery. If the pre-selected power of the range extender is less than the required power of the vehicle, the power battery outputs power according to the power difference between the pre-selected power and the required power of the vehicle to meet the power requirements of the vehicle.
6. The method according to claim 1, characterized in that, The method further includes: During the operation of the range extender, the carbon load of the diesel particulate filter is monitored by a carbon load monitoring device. When the carbon load is greater than a set threshold, the operating speed of the range extender's engine is obtained; When the engine's operating speed is greater than or equal to a set speed value, the regeneration mode of the diesel particulate filter is activated; If the engine's operating speed is lower than the set speed value, the engine's operating speed will be increased to the set speed value. Keeping the pre-selected power of the range extender unchanged, the target torque of the generator in the range extender is determined according to the set speed value; After adjusting the generator torque to the target torque, the regeneration mode of the diesel particulate filter is activated.
7. The method according to claim 1, characterized in that, The method further includes: When the vehicle is under braking control, the braking method of the vehicle is determined based on the vehicle's power battery charge, driving speed, braking degree, and maximum torque of the drive motor.
8. A power control device for a diesel engine range extender, characterized in that, The device includes: The determination module is used to determine the required power of the vehicle based on one or more of the following: vehicle speed, power battery charge, accelerator pedal signal, and brake pedal signal. The determining module is further configured to determine the operating speed of the engine in the range extender based on the vehicle speed range in which the driving speed is located when the total vehicle power demand is greater than zero; wherein, multiple vehicle speed ranges are preset, and the multiple vehicle speed ranges correspond to multiple different engine operating speeds; The acquisition module is used to obtain the power with optimal fuel economy on the universal curve based on the engine's operating speed as the pre-selected power of the corresponding range extender. The control module is used to control the range extender to output power according to the preset power by adjusting the torque of the generator in the range extender.
9. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-7.
10. A vehicle, characterized in that, include: A diesel engine range extender and the electronic device as described in claim 9.