Parking generator system starting and charging control method

Abstract

The invention belongs to the technical field of generator control, and particularly relates to a starting and charging control method for a parking generator system, which comprises the following steps: a generator performs self-starting or hand-pulling starting according to the voltage of a storage battery; when the generator is self-started, the stepping motor opens the accelerator and adjusts the air door and the accelerator according to the environment temperature to complete self-starting; when the generator is started by hand pulling, ignition action is carried out, after the generator is ignited, the stepping motor gradually accelerates the opening speed of the air door according to the environment temperature from low to high, and starting is completed; after the generator is started, entering a constant-current charging mode to charge an accumulator jar, converting into a constant-voltage charging mode after the voltage of the accumulator jar exceeds a preset voltage, and automatically closing the generator when the vehicle is started or the charging current is lower than a preset current in the charging process; by means of the method, the parking generator can be rapidly and automatically started, and more energy is saved in the charging process.

Description

Technical Field

[0001] The present invention relates to the technical field of generator control, and in particular to a method for controlling starting and charging of a parking generator system. Background Art

[0002] In winter or summer, truck drivers will use parking air conditioners when parking and waiting for cargo. The power of the parking air conditioner comes from the on-board battery. When the battery power is very low, the parking air conditioner will stop running to ensure that the car can start normally. If you want to continue to use the parking air conditioner or other load equipment (such as rice cookers, kettles), you need to start the car directly to charge the on-board battery. The car has high energy consumption and there is a lot of noise and vibration in the car. In order to solve the above problems, a parking generator is often installed on the truck. The driver can start the parking generator alone to charge the battery to meet the use of the parking air conditioner or other load equipment.

[0003] However, the existing parking generators have the following shortcomings: 1. When the generator is started, the opening of the air damper and the throttle needs to be controlled before ignition, so as to control the optimal mass ratio of air and fuel (the mixture of air and fuel is called a mixture) (referred to as the air-fuel ratio). After ignition, the rotation speed of the air damper and the throttle needs to be controlled to avoid excessive or insufficient air intake, which leads to flameout. The existing parking generators often require users to rely on experience to operate, and the ambient temperature will affect the optimal air-fuel ratio of the mixture, resulting in difficulty in starting the parking generator; 2. Charging through the parking generator has a lower energy utilization rate than charging during vehicle driving, and the existing parking generator has a relatively single charging mode, and cannot adjust the generator speed in real time according to the charging status of the battery, which leads to energy waste. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a control method for starting and charging a parking generator system, which can enable the parking generator to achieve rapid self-starting and save energy during the charging process.

[0005] The technical solution adopted by the present invention is as follows: A method for controlling starting and charging of a parking generator system, comprising the following steps: When the generator is connected to an external battery, it will start automatically according to the battery voltage. When the generator is not connected to an external power supply, it will start manually. When the generator starts automatically, the stepper motor opens the throttle and adjusts the pre-opening angle of the damper according to the ambient temperature, then adjusts the oil volume to perform multiple ignition cycles until the generator is ignited. After the generator is ignited, the stepper motor gradually increases the damper opening speed from low to high according to the ambient temperature until the damper is fully opened, completing the start-up; When the generator is started manually, the ignition action is performed. After the generator is ignited, the stepper motor adjusts the air door opening speed according to the ambient temperature until the air door is fully opened, completing the start; After the generator is started, it enters the constant current charging mode to charge the battery. When the battery voltage exceeds the preset voltage, it is converted to the constant voltage charging mode. The generator is automatically shut down when the vehicle is started or the charging current is lower than the preset current during the charging process.

[0006] Compared with the prior art, the present invention has the following beneficial effects: 1. The generator starts according to the battery voltage to avoid the battery voltage being too low and causing it to be unable to serve as the generator's starting power source, and to ensure the continuous use of the load equipment. The manual start can be used as an emergency plan when the self-starting part fails, allowing the parking generator to cope with a variety of situations.

[0007] 2. During self-starting, the pre-opening angle of the damper before ignition is adjusted according to the ambient temperature, so that the air-fuel ratio is in the best state, which increases the probability of ignition. After ignition, the damper needs to be fully opened. Due to poor fuel atomization and low combustion efficiency at low temperatures, a richer mixture is required to maintain stable operation, and the generator needs sufficient time to preheat. At high temperatures, the fuel evaporates quickly, the combustion efficiency is high, and the mixture is prone to being too rich. Therefore, the damper should be opened quickly at low temperatures and slowly at high temperatures. The present invention adjusts the opening speed of the damper according to the ambient temperature, so that the generator runs more smoothly and is not easy to stall.

[0008] 3. During hand-starting, since there is no external power supply to drive the stepper motor to adjust the throttle and air damper, the ignition action is generally performed with the throttle fully open and the air damper fully closed. The electricity generated during the ignition process is sufficient to power the stepper motor, so that after ignition, the air damper opening speed is gradually accelerated from low to high according to the ambient temperature, thereby increasing the starting probability as much as possible.

[0009] 4. The stepper motor can accurately control the rotation angle and position, and has the characteristics of high precision, fast response and high stability. Its output shaft can be directly connected to the damper and throttle without the need for a reducer. It is suitable for small angle adjustment of the damper, ensuring the accuracy of air-fuel ratio control and improving the probability of starting.

[0010] 5. After starting, the constant current charging mode can charge quickly when the battery voltage is low, shortening the charging time, while the constant voltage charging mode can automatically reduce the current as the battery voltage increases, protecting the battery. When the current decreases, the speed required by the generator also decreases, thereby reducing fuel consumption.

[0011] 6. As the voltage in the battery continues to increase, the current that can be charged into the battery will continue to decrease. When the current is less than a certain value, the charging efficiency of the parking generator will be extremely low. In order to save energy, the parking generator will be automatically shut down.

[0012] As a preferred embodiment of the present invention, it further includes a first opening determination temperature and a second opening determination temperature, wherein the second opening determination temperature is greater than the first opening determination temperature; When the generator starts automatically, the throttle pre-opening angle is 30°. When the ambient temperature is less than the first opening judgment temperature, the damper is fully closed. When the first opening determination temperature is ≤ the ambient temperature ≤ the second opening determination temperature, the damper is opened in a linear proportion from 0° to the first opening value according to the ambient temperature from low to high, and the first opening value is 20 to 40°; When the ambient temperature is greater than the second opening determination temperature, the damper opens to the first opening value; The first opening degree determination temperature is -10 to 10°C, and the second opening degree determination temperature is 10 to 30°C.

[0013] Beneficial effect: Before ignition, in order to save fuel consumption and avoid the mixture concentration rising too quickly, it is best to limit the throttle pre-opening angle to 30°. When the throttle pre-opening angle is 30°, the temperature rise will make the fuel easier to ignite. Therefore, the higher the temperature, the less oxygen is required, and the larger the pre-opening angle of the throttle is. If the throttle pre-opening angle exceeds the throttle pre-opening angle, the power generated by the combustion will be insufficient and the engine will not be able to start. Therefore, the maximum pre-opening angle value of the throttle is set at 25-35°C. Through the above method, the starting probability can be increased as much as possible under various temperature conditions.

[0014] Beneficial effect: When the ambient temperature is below a certain value, the fuel begins to become difficult to atomize, so the throttle can be fully closed. When it exceeds a certain value, the fuel is extremely volatile, the viscosity is reduced, and it is very easy to burn. It is only necessary to ensure that the power generated by the combustion can drive the engine to start. Therefore, especially in the area between 5°C and 30°C, the pre-opening angle of the throttle is adjusted in linear proportion to increase the probability of starting.

[0015] As a preferred embodiment of the present invention, the self-starting is performed when the voltage of the battery is lower than a preset voltage value, and the preset voltage value is DC23.3V to DC26V.

[0016] Beneficial effect: The lowest voltage of the parking air conditioner is generally DC22.5V. By setting the above preset voltage value, the normal use of the parking air conditioner can be guaranteed as much as possible.

[0017] As a preferred embodiment of the present invention, the multiple cycle ignition action includes the following steps, and multiple ignitions are performed during each step until the ignition is successful: S1: The damper does not move for 1 to 3 seconds according to the pre-opening angle, and then opens at a uniform speed from the starting position within 6 to 8 seconds; S2: The damper remains fully closed for 6 to 8 seconds and then opens to the starting position, and then fully opens at a uniform speed from the starting position within 1 to 3 seconds; S3: After the ignition fails in step S2, the damper is reset and step a1 is repeated until the ignition succeeds.

[0018] Beneficial effect: In the above steps, the exhaust valve will perform exhaust once each time the ignition is performed, so the concentration of the cavity can change with the opening of the damper and the throttle. Since the throttle is always in an open state of 30°, in step S1, the damper is pre-opened for 2S, the amount of oil intake is greater than the amount of air intake, and the concentration gradually increases each time the ignition is performed. It is fully opened at a uniform speed from the starting position within 7 seconds, the amount of air intake is greater, and the concentration gradually decreases. When performing step S2, since the fuel will not be completely eliminated each time the exhaust is performed, the initial concentration of the cavity is already greater than the concentration at the beginning of step S1, and the concentration gradually increases during the process of the damper being fully closed. In 2S, the concentration is fully opened at a uniform speed from the starting position, and the concentration will decrease slightly. The initial concentration in step S3 is greater than that in step S2. Therefore, the concentration of the mixed gas can be dynamically adjusted so that the concentration value gradually increases as a whole, and decreases slightly in each stage. Since the factors affecting ignition are not only the ambient temperature, but also include fuel quality, filter blockage, generator mechanical state, etc., the above factors are not easy to measure. By dynamically adjusting the concentration of the mixed gas, multiple ignition attempts are made to start the generator as quickly as possible.

[0019] As a preferred embodiment of the present invention, it includes a first speed determination temperature, a second speed determination temperature, a third speed determination temperature, and a fourth speed determination temperature from small to large; After the generator is ignited, when the ambient temperature is less than the first speed determination temperature, the stepper motor adjusts the damper to full opening in 90 to 120 milliseconds steps; When the first speed determination temperature ≤ ambient temperature < second speed determination temperature, the stepper motor adjusts the damper to full opening in 60-80 millisecond steps; When the second speed determination temperature ≤ ambient temperature < third speed determination temperature, the stepper motor adjusts the damper to full opening in 30-50 millisecond steps; When the third speed determination temperature ≤ ambient temperature < fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 15-25 millisecond steps; When the ambient temperature is ≥ the fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 6 to 12 milliseconds steps; The first speed determination temperature is 3-7°C, the second speed determination temperature is 6-12°C, the third speed determination temperature is 13-17°C, and the third speed determination temperature is 18-22°C.

[0020] Beneficial effects: 1. Each step of the stepper motor is the minimum adjustment angle, generally between 0.9 and 1.8°, thus achieving precise control of the damper opening; 2. After ignition, the damper needs to be fully opened. Due to poor fuel atomization and low combustion efficiency at low temperatures, a richer mixture is needed to maintain stable operation, and the generator needs sufficient time to preheat. At high temperatures, the fuel evaporates quickly, the combustion efficiency is high, and the mixture is prone to being too rich. Therefore, the damper should be opened quickly at low temperatures and slowly at high temperatures. The present invention adjusts the opening speed of the damper according to the ambient temperature, so that the generator runs more smoothly and is not prone to stalling.

[0021] 3. The inventor's research and experiments have shown that by adjusting the opening speed of the damper within the above temperature range, the probability of flameout is lowest and the operation is most stable.

[0022] As a preferred embodiment of the present invention, when the generator is manually started, after the generator is ignited, when the ambient temperature is less than the fifth speed determination temperature, the stepper motor adjusts the damper to open to 30° in 90 to 120 milliseconds, and then adjusts the damper stepper motor to fully open in one step in 90 to 120 milliseconds; When the ambient temperature is ≥ the fifth speed determination temperature, the stepper motor adjusts the damper to fully open in 30 to 50 milliseconds.

[0023] Beneficial effect: Since the air damper and throttle pre-opening angles before ignition do not change according to the ambient temperature during hand-start, the speed adjustment after ignition is different from that during self-start. It is only divided into two temperature ranges for adjustment, and the air damper speeds are relatively fast to avoid incomplete combustion; the fifth speed judgment temperature is 0-15°C.

[0024] Beneficial effect: The inventor has studied and experimented to prove that by adjusting the opening speed of the damper within the above temperature range, the probability of flameout is lowest and the operation is most stable.

[0025] As a preferred embodiment of the present invention, the generator is started once and then runs for 1.5 to 2.5 hours before being forced to shut down.

[0026] Beneficial effect: Forced shutdown after a certain working time, so that the car battery can only maintain a certain amount of power, so as to achieve the purpose of energy saving.

[0027] As a preferred embodiment of the present invention, when the generator is working, the charging voltage and current are detected by the voltage, current, speed and temperature detection units, and fed back to the MCU. The MCU adjusts the speed of the generator according to the detected values, thereby controlling the charging power; the generator generates three-phase alternating current, which is rectified by a Schottky diode and directly charges the battery.

[0028] Beneficial effects: Existing parking generators generally only detect voltage to adjust the generator speed. However, after long-term use, the voltage of the battery will be artificially high, which will cause speed mismatch, and high temperature will affect the charging efficiency. Therefore, the present invention makes a comprehensive judgment through direct voltage, current, temperature, and speed, and the control is more accurate.

[0029] As a preferred embodiment of the present invention, the generator generates three-phase alternating current, which is rectified by a Schottky diode and directly charges the battery.

[0030] The forward voltage drop of a Schottky diode is usually 0.3V-0.5V, which is lower than that of an ordinary diode (0.7V-1.1V). This reduces energy loss during the rectification process and improves charging efficiency. The Schottky diode has a fast switching speed and a short reverse recovery time, which reduces switching losses and heat accumulation, improves system reliability, and direct rectification and charging does not require a complex control circuit, further reducing costs.

[0031] As a preferred embodiment of the present invention, the constant current charging mode can be switched to the energy-saving charging mode. When in the energy-saving charging mode, the following steps are performed: a1: When the charging current is greater than 74A for 2.5 seconds, the generator speed decreases; a2: Charging current>63A, the generator speed is reduced, and the current is limited to 63A for 15 minutes; a3: Charging current>55A, the generator speed is reduced, and the current is limited to 55A for 45 minutes; a4: Charging current>50A, the generator speed is reduced, the current is limited to 50A and it runs for 60 minutes. If it enters a3 and the battery voltage is lower than 25V for 5 seconds, the timer is cleared and the cycle starts again from step a1.

[0032] Beneficial effect: The charging current is the current that can be charged into the battery. The charging current will decrease as its own voltage increases. Therefore, by gradually reducing the generator speed, fuel consumption can be saved. Under the premise of being able to meet the use needs, the speed can be reduced as much as possible. When the battery voltage is lower than 25V, it means that the load is large and needs to be recharged at a high speed. Through the above method, energy saving can be achieved as much as possible while meeting the use of electrical appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flowchart of the steps of a control method for starting and charging a parking generator system according to a first embodiment of the present invention; Figure 2 It is a charging circuit diagram of a first embodiment of a control method for starting and charging a parking generator system of the present invention; Figure 3 It is a flow chart of the steps of Embodiment 2 of the control method for starting and charging the parking generator system of the present invention. DETAILED DESCRIPTION

[0034] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0035] In the description of the present application, the terms "first", "second", etc. are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] Embodiment 1 See also Figure 1 As shown, this embodiment discloses a control method for starting and charging a parking generator system, comprising the following steps: Step 1: When the vehicle is not started and the generator is connected to an external battery, self-start is performed according to the battery voltage. When the generator has no external power supply, manual start is performed.

[0037] In step one, the starting voltage, charging current, and charging voltage of the parking DC generator are set through the gear switch, instrument, or WeChat applet. Remote control can be achieved through Bluetooth connection. When the voltage of the battery is lower than the preset voltage value, self-starting is performed. The preset voltage value is DC23.3V; the parking DC generator detects the operating status of the car in real time (if the battery voltage is detected to be continuously increasing or fully charged, it is judged to be the operating status of the car. When the car is running, the car's own generator will charge the battery.), when the car is in the parked state, the parking DC generator detects the car battery voltage in real time; when it is detected that the car battery voltage is lower than the set starting voltage, step two can be performed for self-starting.

[0038] Step 2: When the generator starts automatically, the stepper motor opens the throttle and adjusts the pre-opening angle of the damper according to the ambient temperature, then adjusts the oil volume to perform multiple ignition cycles until the generator is ignited. After the generator is ignited, the stepper motor gradually increases the damper opening speed from low to high according to the ambient temperature until the damper is fully open and the start-up is completed.

[0039] In step 2, the judgment logic of the throttle and air valve pre-opening angle before ignition is as follows: The throttle pre-opening angle is 30°. When the ambient temperature is less than the first opening judgment temperature, the damper is fully closed; when the first opening judgment temperature is less than or equal to the ambient temperature less than or equal to the second opening judgment temperature, the damper opens linearly from low to high to 0°~30° according to the ambient temperature; when the ambient temperature is greater than the second opening judgment temperature, the damper opens to the first opening value; the first opening judgment temperature is -5°C and the second opening judgment temperature is 30°C.

[0040] The multiple cycle ignition action includes the following steps, and multiple ignitions are performed during each step until the ignition is successful: S1: The damper remains stationary for 2 seconds according to the pre-opening angle, and then opens at a constant speed from the starting position within 7 seconds; S2: The damper remains fully closed for 7 seconds and then opens to the starting position, and then fully opens at a constant speed from the starting position within 2 seconds; S3: After the ignition fails in step S2, the damper is reset and step a1 is repeated until the ignition succeeds.

[0041] After the generator is ignited, when the ambient temperature is less than the first speed determination temperature, the stepper motor adjusts the damper to full opening in 100 millisecond steps; When the first speed determination temperature ≤ ambient temperature < second speed determination temperature, the stepper motor adjusts the damper to full opening in 70 milliseconds steps; When the second speed determination temperature ≤ ambient temperature < third speed determination temperature, the stepper motor adjusts the damper to full opening in 40 milliseconds steps; When the third speed determination temperature ≤ ambient temperature < fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 20 millisecond steps; When the ambient temperature is ≥ the fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 10 millisecond steps.

[0042] The first speed determination temperature is 5°C, the second speed determination temperature is 10°C, the third speed determination temperature is 15°C, and the third speed determination temperature is 20°C.

[0043] When the ignition in step 2 fails or the user actively starts the engine by hand, the process jumps to step 3. When the ignition in step 2 or step 3 succeeds, the process jumps to step 4.

[0044] Step 3: When the generator is started manually, the ignition action is performed. After the generator is ignited, the stepper motor adjusts the air door opening speed according to the ambient temperature until the air door is fully opened, completing the start-up.

[0045] In step three, when starting by hand, the damper is fully closed and the throttle is fully opened. After the generator is ignited, when the ambient temperature is less than the fifth speed judgment temperature, the stepper motor adjusts the damper to open to 30° in 100 milliseconds, and then adjusts the damper stepper motor to fully open in 90 milliseconds; when the ambient temperature is greater than or equal to the fifth speed judgment temperature, the stepper motor adjusts the damper to fully open in 40 milliseconds; the fifth speed judgment temperature is 10°C.

[0046] Step 4: After the generator is started, it enters the constant current charging mode to charge the battery. When the battery voltage exceeds the preset voltage, it is converted to the constant voltage charging mode. The generator will automatically shut down when the vehicle is started or the charging current is lower than the preset current during the charging process. The parking generator will be forced to shut down after running for two hours.

[0047] In step 4, when the generator is working, the charging voltage and current are detected by the voltage, current, speed and temperature detection unit, and the detection is fed back to the MCU. The MCU adjusts the speed of the generator according to the detected values, thereby controlling the charging power. The generator generates three-phase AC power, which is connected to the Schottky diode (charging circuit diagram as shown in FIG. Figure 2 , 6 MOS tubes Q1-Q6 and 3 Schottky diodes D1-D3 are used for generator self-starting; 12 Schottky diodes D4-D15 are used for three-phase full-wave rectification of the generator; 2 fuses FU1-FU2 are used for input reverse connection protection;) After rectification, the battery is directly charged.

[0048] Embodiment 2: See also Figure 3 As shown, this embodiment discloses a control method for starting and charging a parking generator system, comprising the following steps: Step 1: When the vehicle is not started and the generator is connected to an external battery, self-start is performed according to the battery voltage. When the generator has no external power supply, manual start is performed.

[0049] In step one, the starting voltage, charging current, and charging voltage of the parking DC generator are set through the gear switch, instrument, or WeChat applet. Remote control can be achieved through Bluetooth connection. The preset voltage value is DC26V; the parking DC generator detects the operating status of the car in real time. When the car is in the parked state, the parking DC generator detects the car battery voltage in real time; when it is detected that the car battery voltage is lower than the set starting voltage, step two can be performed for self-starting.

[0050] Step 2: When the generator starts automatically, the stepper motor opens the throttle and adjusts the pre-opening angle of the damper according to the ambient temperature, then adjusts the oil volume to perform multiple ignition cycles until the generator is ignited. After the generator is ignited, the stepper motor gradually increases the damper opening speed from low to high according to the ambient temperature until the damper is fully open and the start-up is completed.

[0051] In step 2, the judgment logic of the throttle and air valve pre-opening angle before ignition is as follows: The throttle pre-opening angle is 30°. When the ambient temperature is less than the first opening judgment temperature, the damper is fully closed; when the first opening judgment temperature is less than or equal to the ambient temperature less than or equal to the second opening judgment temperature, the damper opens linearly from low to high to 0°~30° according to the ambient temperature; when the ambient temperature is greater than the second opening judgment temperature, the damper opens to the first opening value; the first opening judgment temperature is -5°C and the second opening judgment temperature is 30°C.

[0052] The multiple cycle ignition action includes the following steps, and multiple ignitions are performed during each step until the ignition is successful: S1: The damper remains stationary for 2 seconds according to the pre-opening angle, and then opens at a constant speed from the starting position within 7 seconds; S2: The damper remains fully closed for 7 seconds and then opens to the starting position, and then fully opens at a constant speed from the starting position within 2 seconds; S3: After the ignition fails in step S2, the damper is reset and step a1 is repeated until the ignition succeeds.

[0053] After the generator is ignited, when the ambient temperature is less than the first speed determination temperature, the stepper motor adjusts the damper to full opening in 100 millisecond steps; When the first speed determination temperature ≤ ambient temperature < second speed determination temperature, the stepper motor adjusts the damper to full opening in 70 milliseconds steps; When the second speed determination temperature ≤ ambient temperature < third speed determination temperature, the stepper motor adjusts the damper to full opening in 40 milliseconds steps; When the third speed determination temperature ≤ ambient temperature < fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 20 millisecond steps; When the ambient temperature is ≥ the fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 10 millisecond steps.

[0054] The first speed determination temperature is 5°C, the second speed determination temperature is 10°C, the third speed determination temperature is 15°C, and the third speed determination temperature is 20°C.

[0055] When the ignition in step 2 fails or the user actively starts the engine by hand, the process jumps to step 3. When the ignition in step 2 or step 3 succeeds, the process jumps to step 4.

[0056] Step 3: When the generator is started manually, the ignition action is performed. After the generator is ignited, the stepper motor adjusts the air door opening speed according to the ambient temperature until the air door is fully opened, completing the start-up.

[0057] In step three, when starting by hand, the damper is fully closed and the throttle is fully opened. After the generator is ignited, when the ambient temperature is less than the fifth speed determination temperature, the stepper motor adjusts the damper to open to 30° in 100 milliseconds, and then adjusts the damper stepper motor to fully open in 90 milliseconds; when the ambient temperature is greater than or equal to the fifth speed determination temperature, the stepper motor adjusts the damper to fully open in 40 milliseconds; the fifth speed determination temperature is 0-15°C.

[0058] Step 4: After the generator is started, it enters the constant current charging mode to charge the battery. When the battery voltage exceeds the preset voltage, it is converted to the energy-saving charging mode. The generator is automatically shut down when the vehicle is started or the charging current is lower than the preset current during the charging process.

[0059] In step 4, when the generator is working, the charging voltage and current are detected by the voltage, current, speed and temperature detection unit, and the detected values ​​are fed back to the MCU. The MCU adjusts the speed of the generator according to the detected values, thereby controlling the charging power. The generator generates three-phase alternating current, which is rectified by the Schottky diode and directly charges the battery. When in energy saving charging mode, follow the steps below: a1: When the charging current is greater than 74A for 2.5 seconds, the generator speed decreases; a2: Charging current>63A, the generator speed is reduced, and the current is limited to 63A for 15 minutes; a3: Charging current>55A, the generator speed is reduced, and the current is limited to 55A for 45 minutes; a4: Charging current>50A, the generator speed is reduced, the current is limited to 50A and it runs for 60 minutes. If it enters a3 and the battery voltage is lower than 25V for 5 seconds, the timer is cleared and the cycle starts again from step a1.

[0060] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for controlling the starting and charging of a parking generator system, characterized in that: The steps include: When the vehicle is not started and the generator is connected to an external battery, it will start automatically according to the battery voltage, and will start manually when the generator has no external power supply; When the generator starts automatically, the stepper motor opens the throttle and adjusts the pre-opening angle of the damper according to the ambient temperature, then adjusts the oil volume to perform multiple ignition cycles until the generator is ignited. After the generator is ignited, the stepper motor gradually increases the damper opening speed from low to high according to the ambient temperature until the damper is fully opened, completing the start-up; When the generator is started manually, the ignition action is performed. After the generator is ignited, the stepper motor adjusts the air door opening speed according to the ambient temperature until the air door is fully opened, completing the start; After the generator is started, it enters the constant current charging mode to charge the battery. When the battery voltage exceeds the preset voltage, it is converted to the constant voltage charging mode. The generator is automatically shut down when the vehicle is started or the charging current is lower than the preset current during the charging process.

2. The method for controlling the starting and charging of the parking generator system according to claim 1, characterized in that: Also includes a first opening determination temperature and a second opening determination temperature, the second opening determination temperature being greater than the first opening determination temperature; When the generator starts automatically, the throttle pre-opening angle is 30°. When the ambient temperature is less than the first opening judgment temperature, the damper is fully closed. When the first opening determination temperature is ≤ the ambient temperature ≤ the second opening determination temperature, the damper is opened in a linear proportion from 0° to the first opening value according to the ambient temperature from low to high, and the first opening value is 20 to 40°; When the ambient temperature is greater than the second opening determination temperature, the damper opens to the first opening value; The first opening degree determination temperature is 0-10°C, and the second opening degree determination temperature is 25-35°C.

3. The method for controlling the starting and charging of the parking generator system according to claim 1, characterized in that: When the voltage of the battery is lower than a preset voltage value, the battery starts automatically. The preset voltage value is DC23.3V to DC26V.

4. The method for controlling the starting and charging of a parking generator system according to claim 1, characterized in that: The multiple cycle ignition action includes the following steps, and multiple ignitions are performed during each step until the ignition is successful: S1: The damper does not move for 1 to 3 seconds according to the pre-opening angle, and then opens at a uniform speed from the starting position within 6 to 8 seconds; S2: The damper remains fully closed for 6 to 8 seconds and then opens to the starting position, and then fully opens at a uniform speed from the starting position within 1 to 3 seconds; S3: After the ignition fails in step S2, the damper is reset and step a1 is repeated until the ignition succeeds.

5. The method for controlling the starting and charging of the parking generator system according to claim 1, characterized in that: The temperature includes a first speed determination temperature, a second speed determination temperature, a third speed determination temperature, and a fourth speed determination temperature from small to large; After the generator is ignited, when the ambient temperature is less than the first speed determination temperature, the stepper motor adjusts the damper to full opening in 90 to 120 milliseconds steps; When the first speed determination temperature ≤ ambient temperature < second speed determination temperature, the stepper motor adjusts the damper to full opening in 60-80 millisecond steps; When the second speed determination temperature ≤ ambient temperature < third speed determination temperature, the stepper motor adjusts the damper to full opening in 30-50 millisecond steps; When the third speed determination temperature ≤ ambient temperature < fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 15-25 millisecond steps; When the ambient temperature is ≥ the fourth speed determination temperature, the stepper motor adjusts the damper to full opening in 6 to 12 milliseconds steps; The first speed determination temperature is 3-7°C, the second speed determination temperature is 6-12°C, the third speed determination temperature is 13-17°C, and the third speed determination temperature is 18-22°C.

6. The method for controlling the starting and charging of a parking generator system according to claim 1, characterized in that: When the generator is started manually, after the generator is ignited, when the ambient temperature is less than the fifth speed judgment temperature, the stepper motor adjusts the air door to open to 20-30 degrees in 90-120 milliseconds, and then adjusts the air door stepper motor to fully open in one step in 90-120 milliseconds; When the ambient temperature is ≥ the fifth speed determination temperature, the stepper motor adjusts the damper to fully open in 30 to 50 milliseconds; the fifth speed determination temperature is 0 to 15°C.

7. The method for controlling the starting and charging of a parking generator system according to claim 1, characterized in that: The generator is started once and runs for 1.5 to 2.5 hours before being forced to shut down.

8. The method for controlling the starting and charging of a parking generator system according to claim 1, characterized in that: When the generator is working, the charging voltage and current are detected by the voltage, current, speed and temperature detection units, and fed back to the MCU. The MCU adjusts the speed of the generator according to the detected values, thereby controlling the charging power.

9. The method for controlling the starting and charging of a parking generator system according to claim 1, characterized in that: The generator generates three-phase AC power, which is rectified by Schottky diodes and directly charges the battery.

10. The method for controlling the starting and charging of the parking generator system according to claim 9, characterized in that: The constant current charging mode can be switched to the energy-saving charging mode. When in the energy-saving charging mode, the following steps are performed: a1: When the charging current is greater than 74A for 2.5 seconds, the generator speed decreases; a2: Charging current>63A, the generator speed is reduced, and the current is limited to 63A for 15 minutes; a3: Charging current>55A, the generator speed is reduced, and the current is limited to 55A for 45 minutes; a4: Charging current>50A, the generator speed is reduced, the current is limited to 50A and it runs for 60 minutes. If it enters a3 and the battery voltage is lower than 25V for 5 seconds, the timer is cleared and the cycle starts again from step a1.

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