Engine electric appliance control method and controller thereof

Abstract

The invention discloses an engine electric appliance control method and a controller thereof, and relates to the technical field of automobile control, and the control method comprises the following steps: based on the input and output relation of an automobile generator and a starter, establishing line connection between the engine electric appliance controller and the generator, the starter and a whole automobile wire harness; an engine electric appliance controller is used for monitoring a revolution signal of a generator, an indicator lamp switch signal and a starter switch-on signal in real time; in the normal operation process of an automobile engine, changes of power supply voltage and revolution signals are monitored in real time, switching of working modes of the generator is controlled, and fault information in the control process is output through threshold analysis; and an indicator lamp switching signal and a revolution signal are monitored in real time. According to the invention, the problem that detail parameters such as voltage signal waveform, voltage and current are not standard due to a circuit structure is solved, and the problem of ideal abnormal matching between input and output signal states and a whole vehicle circuit system is solved.

Description

Technical Field

[0001] The present invention relates to the field of automobile control technology, and in particular to an engine electrical control method and a controller thereof. Background Art

[0002] In the field of commercial vehicles and non-road vehicles such as construction machinery, agricultural machinery, forklifts, etc., the engines installed in these vehicles are generally purchased from professional engine manufacturers. There are many manufacturers and suppliers of engines, their generators, and starters, and the supporting models are complex and there is no unified interface standard in the industry. In addition, there are many manufacturers of such vehicles, and their models are also in a state of customized production in small batches of multiple varieties due to different uses. The large number of manufacturers and models has led to huge differences in vehicle circuits, which has led to prominent problems in matching generators, starters and models. The main phenomena are: abnormal lighting indication of the charging indicator light, the generator does not generate electricity at idle speed, generates electricity too early, abnormal speed signal voltage, abnormal auxiliary load output terminal, etc., difficulty in starting the starter, over-temperature damage, top gear, gear knocking, etc., as well as leakage after parking, no lights, abnormal battery charging, etc.

[0003] Since the current engine and the generator and starter on the engine are all independently connected to the vehicle wiring harness, the above three parts cannot work in a coordinated manner under the best conditions, resulting in a high failure rate of components and a decline in the quality of the entire engine.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides an engine electrical control method, which has the advantage of achieving idealized input and output signal states, thereby solving the problem of abnormal matching with the entire vehicle circuit system, and solving the problem in traditional technology that the engine and the generator and starter on the engine are all independently connected to the vehicle wiring harness.

[0007] (II) Technical solution

[0008] In order to achieve the above idealized input and output signal states and thereby solve the problem of abnormal matching with the vehicle circuit system, the specific technical solution adopted by the present invention is as follows:

[0009] In a first aspect, a method for controlling an engine electrical appliance is provided, the method comprising:

[0010] S1. Based on the input-output relationship between the automobile generator and the starter, build the line connection between the engine electrical controller and the generator, starter and vehicle wiring harness;

[0011] S2. Using the engine electrical controller to monitor the generator's speed signal, indicator light switch signal, and starter on signal in real time, and based on the monitoring results of the speed signal, indicator light switch signal, and starter on signal, control the switching of the working modes of the starter and the generator, and record the starter working time;

[0012] S3. During the normal operation of the automobile engine, the changes of the power supply voltage and the speed signal are monitored in real time, the working mode switching of the generator is controlled, and the fault information of the control process is output through threshold analysis;

[0013] S4. Real-time monitoring of the indicator light switch signal and the speed signal. When the start switch and the indicator light switch are disconnected and the speed is zero, it is determined that the vehicle is switched from the running state to the stopped state, and the engine electrical controller is switched to the low power consumption mode.

[0014] Furthermore, the circuit of the engine electrical controller includes a starter control input line, a charging indicator light control line, an engine speed signal output line and an auxiliary load output line facing the vehicle wiring harness, and a starter control output line, a generator control output line and a generator speed signal input line facing the starter and generator.

[0015] Furthermore, the engine electrical controller is used to monitor the speed signal of the generator, the indicator light switch signal and the starter on signal in real time, and based on the monitoring results of the speed signal, the indicator light switch signal and the starter on signal, the working mode switching of the starter and the generator is controlled, and the starter working time is recorded, which includes the following steps:

[0016] S21, based on the speed signal, indicator light switch signal and starter on signal obtained by real-time monitoring, control the engine electrical controller to execute the working mode switch and exit the low power consumption mode;

[0017] S22, after the input indicator light switch is closed, the indicator light switch signal is triggered. After receiving the indicator light switch signal, the engine electrical controller uses the charging indicator light control line to turn on the indicator light, and controls the generator to enter the external control forced pre-excitation state through the generator control output line;

[0018] S23, after the starter switch at the input end is turned on, the starter on signal is triggered, the engine electrical controller receives the starter on signal, combines the change of the speed signal, controls the switching of the starter's working mode, and responds to the starter's protection mechanism according to the ambient temperature and working time of the starter.

[0019] Furthermore, when the engine electrical controller does not detect a speed signal, the engine electrical controller is in a low power consumption mode, and when the engine electrical controller detects at least one of a speed signal, an indicator light switch signal or a starter on signal, the engine electrical controller exits the low power consumption mode.

[0020] Furthermore, after the starter switch at the input end is turned on, a starter on signal is triggered, and the engine electrical controller receives the starter on signal, controls the starter working mode switching in combination with the change of the speed signal, and responds to the starter protection mechanism according to the ambient temperature and working time of the starter operation, including the following steps:

[0021] S231, after receiving the starter on signal, the engine electrical controller uses the starter control output line to control the starter to enter the working state, and outputs a PWM signal with a fixed duty cycle through the generator control output line to control the generator to enter the external control forced pre-excitation state;

[0022] S232, using a timer to record the working time of the starter after it enters the working state, after the engine electrical controller receives the generator speed signal, it converts it into the engine speed, and after the engine speed reaches a preset speed threshold or the working time reaches a preset duration, the starter is turned off using the starter control output line to control the starter to exit the working state;

[0023] S233, monitoring the current ambient temperature, querying the preset maximum starting time threshold under the current temperature according to the current ambient temperature, and when the starting time is greater than the threshold, triggering the starter fault indication and protection mechanism, outputting the starter fault information and exiting the current work;

[0024] S234, detecting a battery voltage drop value when the starter is started, and when the voltage drop value exceeds a voltage drop threshold, triggering a battery fault indication, and outputting battery fault information.

[0025] Furthermore, the protection mechanism of the starter is to control the delay between the starter's exit from operation and continuous starting through the starter control output line after the starter reaches the maximum operating time.

[0026] Furthermore, during the normal operation of the automobile engine, the changes of the power supply voltage and the speed signal are monitored in real time, the working mode switching of the generator is controlled, and the fault information in the control process is output through threshold analysis, including the following steps:

[0027] S31, converting the generator speed signal into an engine speed signal, and controlling the generator to switch to a normal power generation mode through a generator control output line by comparing the engine speed signal with the idle speed and delay threshold at a preset temperature;

[0028] S32. Monitor the power supply voltage during the operation of the generator. When the power supply voltage exceeds the voltage threshold range, the generator fault indication is triggered by controlling the opening and closing of the indicator light, and the generator fault information is output.

[0029] Further, converting the generator speed signal into an engine speed signal, and controlling the generator to switch to a normal power generation mode through a generator control output line by comparing the engine speed signal with the idle speed and delay threshold at a preset temperature includes the following steps:

[0030] If the current engine speed signal is greater than the preset idle speed and delay threshold, the engine electrical controller controls the generator to exit the external control forced pre-excitation mode through the generator control output line and execute the normal power generation mode.

[0031] In a second aspect, an engine electrical controller is also provided, including an engine electrical controller connected to a generator, a starter and a vehicle wiring harness, the engine electrical controller including: an MCU master control unit, an MCU power supply circuit, a starter control circuit, a B+ voltage sampling circuit, a temperature detection circuit, an indicator light control circuit, a generator speed input circuit, a Wout signal output circuit, a generator control output circuit and an auxiliary load control circuit;

[0032] Among them, the MCU main control unit is connected to the MCU power supply circuit, the MCU main control unit is connected to the starter control circuit, the MCU main control unit is connected to the B+ voltage sampling circuit, the MCU main control unit is connected to the temperature detection circuit, the MCU main control unit is connected to the indicator light control circuit, the MCU main control unit is connected to the generator speed input circuit, the MCU main control unit is connected to the Wout signal output circuit, the MCU main control unit is connected to the generator control output circuit, and the MCU main control unit is connected to the auxiliary load control circuit.

[0033] Furthermore, the circuit of the engine electrical controller includes a starter control input line, a charging indicator light control line, an engine speed signal output line and an auxiliary load output line facing the vehicle wiring harness, and a starter control output line, a generator control output line and a generator speed signal input line facing the starter and generator.

[0034] (III) Beneficial effects

[0035] Compared with the prior art, the present invention provides an engine electrical control method and controller thereof, which have the following beneficial effects: through a generator and starter controller installed on the engine, namely, the engine electrical controller, the calibration of the control logic of the generator and starter that it matches is completed synchronously during the engine design stage, and the calibration content includes: the starting number of generator power generation revolutions, soft loading time, maximum working time of the starter, exiting working revolutions and other parameters at different ambient temperatures, so that the engine, generator and starter can work in a coordinated manner according to the set method, avoiding the adverse effects caused by abnormal user operations. At the same time, through the input and output circuits of the MCU control logic in the controller to perform circuit signal conversion, the problem of non-standardization of detailed parameters such as voltage signal waveform, voltage, current, etc. caused by the circuit structure is solved, and the problem of abnormal matching between the idealized input and output signal states and the vehicle circuit system is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a flow chart of an engine electrical control method according to an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the circuit connection between the engine electrical controller and the generator, the starter and the vehicle wiring harness in the engine electrical control method according to an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of the circuit structure of an engine electrical controller according to an embodiment of the present invention;

[0040] Figure 4 Schematic diagram of a MCU power supply circuit in an engine electrical controller according to an embodiment of the present invention;

[0041] Figure 5 is a schematic diagram of a B+ voltage sampling circuit in an engine electrical controller according to an embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of an indicator light control circuit in an engine electrical controller according to an embodiment of the present invention;

[0043] Figure 7 is a schematic diagram of a Wout signal output circuit in an engine electrical controller according to an embodiment of the present invention;

[0044] Figure 8is a schematic diagram of a starter control circuit in an engine electrical controller according to an embodiment of the present invention;

[0045] Fig. 9 is a schematic diagram of an auxiliary load control circuit in an engine electrical controller according to an embodiment of the present invention;

[0046] Fig.10 is a schematic diagram of a temperature detection circuit in an engine electrical controller according to an embodiment of the present invention;

[0047] Fig.11 is a schematic diagram of a generator speed input circuit in an engine electrical controller according to an embodiment of the present invention;

[0048] Fig.12 It is a schematic diagram of a generator control output circuit in an engine electrical controller according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] According to one embodiment of the present invention, a method for controlling engine electrical equipment is provided.

[0050] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 2 As shown, according to an engine electrical control method according to an embodiment of the present invention, the control method includes:

[0051] S1. Based on the input-output relationship between the automobile generator and the starter, build the line connection between the engine electrical controller and the generator, starter and vehicle wiring harness.

[0052] In this embodiment, if Figure 2 As shown, the circuit of the engine electrical controller includes the starter control input line, the charging indicator light control line, the engine speed signal output line and the auxiliary load output line facing the vehicle wiring harness, and the starter control output line, the generator control output line and the generator speed signal input line facing the starter and generator.

[0053] S2. Use the engine electrical controller to monitor the generator's speed signal, indicator light switch signal and starter on signal in real time. Based on the monitoring results of the speed signal, indicator light switch signal and starter on signal, control the switching of the starter and generator working modes, and record the starter working time.

[0054] In this embodiment, the engine electrical controller is used to monitor the generator's revolution signal, indicator light switch signal, and starter on signal in real time, and based on the monitoring results of the revolution signal, indicator light switch signal, and starter on signal, the starter and generator's working mode switching is controlled, and the starter working time is recorded, including the following steps:

[0055] S21, based on the speed signal, indicator light switch signal and starter on signal obtained through real-time monitoring, control the engine electrical controller to execute the working mode switch and exit the low power consumption mode.

[0056] In this embodiment, when the engine electrical controller does not detect a speed signal, the engine electrical controller is in a low power consumption mode, and when the engine electrical controller detects at least one of a speed signal, an indicator light switch signal or a starter on signal, the engine electrical controller exits the low power consumption mode.

[0057] S22, after the input indicator light switch is closed, the indicator light switch signal is triggered. After receiving the indicator light switch signal, the engine electrical controller uses the charging indicator light control line to turn on the indicator light, and controls the generator to enter the external control forced pre-excitation state through the generator control output line.

[0058] S23, after the starter switch at the input end is turned on, the starter on signal is triggered, the engine electrical controller receives the starter on signal, combines the change of the speed signal, controls the switching of the starter's working mode, and responds to the starter's protection mechanism according to the ambient temperature and working time of the starter.

[0059] In this embodiment, the starter switch at the input end is turned on to trigger the starter on signal, the engine electrical controller receives the starter on signal, combines the change of the speed signal, controls the starter working mode switching, and responds to the starter protection mechanism according to the ambient temperature and working time of the starter operation, including the following steps:

[0060] S231, after receiving the starter on signal, the engine electrical controller uses the starter control output line to control the starter to enter the working state, and outputs a PWM signal with a fixed duty cycle through the generator control output line to control the generator to enter the external control forced pre-excitation state;

[0061] S232. Use a timer to record the working time of the starter after it enters the working state. After the engine electrical controller receives the generator speed signal, it converts it into the engine speed. After the engine speed reaches a preset speed threshold or the working time reaches a preset duration, use the starter control output line to turn off the starter and control the starter to exit the working state.

[0062] In addition, the protection mechanism of the starter is to control the delay between the starter's exit from operation and continuous starting through the starter control output line after the starter reaches the maximum working time.

[0063] S233, monitoring the current ambient temperature, and querying the preset temperature threshold of the starter according to the current ambient temperature, as the temperature threshold after exiting the working state this time.

[0064] S234, detecting the battery voltage drop value when the starter is started, and when the voltage drop value exceeds the voltage drop range, triggering a battery fault indication, and outputting battery fault information.

[0065] S3. During the normal operation of the automobile engine, the changes in temperature, power supply voltage and speed signals are monitored in real time to control the switching of the generator's working mode, and fault information in the control process is output through threshold analysis.

[0066] In this embodiment, during the normal operation of the automobile engine, the changes of the power supply voltage and the speed signal are monitored in real time, the working mode switching of the generator is controlled, and the fault information in the control process is output through threshold analysis, including the following steps:

[0067] S31, converting the generator speed signal into an engine speed signal, and controlling the generator to switch to a normal power generation mode through a generator control output line by comparing the engine speed signal with the idle speed and delay threshold at a preset temperature.

[0068] S32. Monitor the power supply voltage during the operation of the generator. When the power supply voltage exceeds the voltage threshold range, the generator fault indication is triggered by controlling the opening and closing of the indicator light, and the generator fault information is output.

[0069] In this embodiment, converting the generator speed signal into an engine speed signal, and controlling the generator to switch to the normal power generation mode through the generator control output line by comparing the engine speed signal with the idle speed and delay threshold at a preset temperature includes the following steps:

[0070] If the current engine speed signal is greater than the preset idle speed and delay threshold, the engine electrical controller outputs a continuous high potential or a PWM signal with a voltage-controlled duty cycle change through the generator control output line, causing the generator to exit the external control forced pre-excitation mode and execute the normal power generation mode.

[0071] S4. Real-time monitoring of the indicator light switch signal and the speed signal. When the start switch and the indicator light switch are disconnected and the speed is zero, it is determined that the vehicle is switched from the running state to the stopped state, and the engine electrical controller is switched to the low power consumption mode.

[0072] According to another embodiment of the present invention, an engine electrical controller is provided.

[0073] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 3-Figure 12As shown, the engine electrical controller according to an embodiment of the present invention includes an engine electrical controller that maintains line connection with the generator, the starter and the vehicle wiring harness, and the engine electrical controller includes: an MCU general control unit, an MCU power supply circuit, a starter control circuit, a B+ voltage sampling circuit, a temperature detection circuit, an indicator light control circuit, a generator speed input circuit, a Wout signal output circuit, a generator control output circuit and an auxiliary load control circuit.

[0074] Among them, the MCU main control unit is connected to the MCU power supply circuit, the MCU main control unit is connected to the starter control circuit, the MCU main control unit is connected to the B+ voltage sampling circuit, the MCU main control unit is connected to the temperature detection circuit, the MCU main control unit is connected to the indicator light control circuit, the MCU main control unit is connected to the generator speed input circuit, the MCU main control unit is connected to the Wout signal output circuit, the MCU main control unit is connected to the generator control output circuit, and the MCU main control unit is connected to the auxiliary load control circuit.

[0075] In this embodiment, the circuit of the engine electrical controller includes a starter control input line, a charging indicator light control line, an engine speed signal output line and an auxiliary load output line facing the vehicle wiring harness, and a starter control output line, a generator control output line and a generator speed signal input line facing the starter and generator.

[0076] The following is a detailed description of each module circuit inside the engine electrical controller in conjunction with the accompanying drawings and specific embodiments.

[0077] 1. MCU power supply circuit inside the engine electrical controller: Figure 4 As shown, the power supply of the internal MCU master control unit chip is filtered by the battery through R9 to C5 and then enters the U1 voltage regulator chip. It is stabilized to the voltage required by the MCU master control unit through the voltage regulator chip and then output. It is filtered again by the C4 filter capacitor to power the MCU master control unit control chip.

[0078] 2. Engine electrical controller B+ voltage sampling circuit: Figure 5 As shown in the figure, the internal MCU master control unit is divided by R7 and R8, stabilized by ZD3 and filtered by C1, and enters the MCU master control unit B+_ad_in voltage detection point to realize the control of the voltage by the engine electrical controller. The MCU master control unit monitors in real time through the B+_ad_in pin.

[0079] 3. Engine electrical controller indicator light control circuit: Figure 6As shown, Q1 transistor is equivalent to an electronic switch. The switch is transmitted by the MCU master control unit through the resistor R1 to turn Q1 on or off to realize the control of the indicator light by the engine electrical controller. Q1 is detected by the Star_Lamp pin of the ECU master control unit, and the L_ctr pin controls the output.

[0080] 4. Engine electrical controller Wout signal output circuit: Figure 7 As shown, Q2 is a power switch transistor, and the switch is driven by Q3 transistor through R2 and R3 resistors to form the speed signal required by the instrument and realize the Wout signal output of the engine electrical controller. Q3 is controlled by the W_ctr pin of the ECU master control unit.

[0081] 5. Engine electrical controller starter control circuit: Figure 8 As shown, Q6 is a power switch transistor, and the switch is driven by Q7 transistor through R10 and R11 resistors, so that the starter is connected to the circuit and started, realizing the starter control of the engine electrical controller. Q7 is controlled by the Star_ctr pin of the MCU master control unit.

[0082] 6. Engine electrical controller auxiliary load control circuit: Fig. 9 As shown, Q4 is a power switch transistor, and the switch is driven by Q5 transistor through R5 and R6 resistors to connect the generator power to the auxiliary load, realizing the auxiliary load control of the engine electrical controller. Q5 is controlled by the Ld_crt pin of the MCU master control unit.

[0083] 7. Temperature detection circuit of engine electrical controller: Fig.10 As shown, the temperature detection circuit is assembled by resistor R4 and negative temperature coefficient resistor NTC. The resistance of NTC resistor will change with the change of temperature, thereby forming a voltage change at the Temp_detc point, and converting the temperature change into a voltage change signal to be transmitted to the MCU main control unit. The MCU main control unit converts the corresponding temperature through the voltage value to realize the temperature detection of the engine electrical controller.

[0084] 8. Engine electrical controller generator speed input circuit: Fig.11 As shown, the generator speed input signal is input to the MCU main control unit through the Win_detc detection terminal after being divided by resistors R17 and R16, filtered by capacitor C6 and stabilized by ZD6.

[0085] 9. Engine electrical controller generator control output circuit: Fig.12As shown, Q8 is a power switch transistor, and the switch is driven by Q9 transistor through R18 and R19 resistors, so that the generator is connected to the control output circuit to realize the control of the generator. Q9 is controlled by the La_ctr pin of the MCU master control unit.

[0086] In addition, the typical control logic of the engine electrical controller is as follows:

[0087] 1. The controller is in low power consumption mode when there is no speed signal input from the generator, and exits low power consumption mode when there is speed signal input, indicator light switch, or starter control is turned on.

[0088] 2. After the input indicator light switch is turned on, the control circuit inside the controller turns on the indicator light and controls the generator to enter the external control forced pre-excitation state through the generator control output.

[0089] 3. After the starter switch is connected to the input end, the starter control output signal is turned on inside the engine electrical controller, the starter enters the working state and outputs a PWM signal with a fixed duty cycle through the generator control output line to control the generator to enter the external control forced pre-excitation state. The input end of the generator speed signal is detected and converted into the engine speed. After the speed reaches the preset value and duration, the starter control output is turned off to make the starter exit the working mode.

[0090] 4. The voltage value of the power supply is monitored through the internal voltage detection circuit of the engine electrical controller. If it exceeds the threshold range, the MCU main control unit controls the indicator light through the indicator light control circuit to give a corresponding fault indication.

[0091] 5. The ambient temperature is read through the temperature detection circuit inside the engine electrical controller. The MCU general control unit queries the preset maximum start time threshold at the current temperature based on the ambient temperature. When the start time is greater than this threshold, the starter fault indication and protection mechanism is triggered, the starter fault information is output and the current operation is stopped.

[0092] 6. The starter working time is obtained through the internal timer of the MCU master control unit. When the maximum working time is reached, the starter control output is used to delay the starter's exit from work and the continuous starting, which is used as a protection mechanism for the starter.

[0093] 7. The MCU master control unit determines whether the engine has reached the idle speed threshold through the generator speed signal. If the idle speed threshold is reached, the generator is controlled to exit the external control forced pre-magnetization mode through the generator control output line (the generator control output line can output a continuous high potential or a PWM signal with a duty cycle changed by voltage) and execute the normal power generation mode.

[0094] 8. The battery voltage drop value when the starter is started is detected by the internal voltage detection circuit of the engine electrical controller, and the MCU general control unit calculates the internal resistance of the battery and also incorporates the battery status factor into the control strategy.

[0095] 9. Fault indication is given after judging the status of the internal voltage detection circuit and input signal of the engine electrical controller. It can be an indicator light status indication or a signal or command output indication. The contents include: generator failure (voltage value out of range, no phase signal input), starter failure (voltage fluctuation exceeds the threshold during starting, voltage does not recover after the starter quits working), battery failure (the voltage drop value exceeds the threshold when the starter starts).

[0096] For example, dual indications can be given through the charging indicator light on the dashboard and the indicator light on the controller: 1. The charging indicator light on the dashboard flashes in the standby stage when the key is turned on but not started, prompting the user to check the cause; 2. The controller is equipped with three indicator lights. The corresponding indicator light will light up continuously if there is a fault in the generator, starter, or battery, making it easy for users to determine the source of the fault.

[0097] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

[0098] In practical applications, according to the above-mentioned circuit structure of the engine electrical controller and their respective operating principles, the vehicle operating state and the working mode of the engine electrical controller can be divided into the following aspects.

[0099] 1. Vehicle out of service status:

[0100] The MCU master control unit is maintained in a low power consumption working mode through the MCU power supply circuit.

[0101] The output pin status is: the generator speed input Win terminal is suspended, the speed feedback Wout terminal is suspended, the auxiliary load output load terminal is suspended, the generator control La terminal is grounded, the starter switch detection Star terminal is grounded, the starter control Sout terminal is suspended, and the fault indication terminal Indicate is suspended.

[0102] 2. Standby state when the indicator light switch is turned on:

[0103] At this time, the indicator light switch is closed, the MCU main control unit detects the indicator light switch closing signal through the Star_lamp terminal, the indicator light control circuit turns on the indicator light, the generator control output La terminal outputs a high level, so that the generator enters the pre-excitation state, the Win terminal receives the generator speed signal, and the temperature detection circuit of the MCU main control unit detects the current ambient temperature, matches the startup parameters for the next step, and waits for startup.

[0104] The output pin status is: the generator speed input Win terminal detects the speed signal, the speed feedback Wout terminal is suspended, the auxiliary load output load terminal is suspended, the generator control La terminal is high level, the starter switch detection Star terminal is grounded, the starter control Sout terminal is suspended, and the fault indication terminal Indicate turns on the corresponding indicator light according to the fault type.

[0105] 3. The process of starting the vehicle:

[0106] At this time, the starter switch is closed, and the MCU main control unit detects the starter switch closing signal through the MCU's Star_detc terminal, and controls the starter control output terminal Sout to send a start signal to the starter. During the starting process, by receiving the generator Win terminal signal, it determines the current number of engine speeds reached, thereby determining whether the starter has completed the starting process. After completing the starting process, the control terminal Sout starts the starter to exit the starting state.

[0107] The output pin status is: the generator speed input Win terminal receives the generator phase signal, the speed feedback Wout terminal is the PWM signal, the auxiliary load output load terminal is suspended, the generator control La terminal is high level, the starter switch detection Star terminal is grounded, the starter control Sout terminal is suspended, and the fault indication terminal Indicate turns on the corresponding indicator light according to the fault type.

[0108] 4. When the engine is running normally:

[0109] The MCU control unit controls the generator to enter the full excitation state through the La terminal, so that the generator enters the normal power generation state. The Win terminal receives the generator phase signal, the speed feedback terminal Wout terminal outputs the speed signal, the auxiliary load control terminal Load controls the normal auxiliary load output, and the fault indication terminal Indicate transmits the fault indication information in real time.

[0110] The output pin status is: the generator speed input Win terminal receives the generator phase signal, the speed feedback Wout terminal is the PWM speed signal, the auxiliary load output load terminal is high level, the generator control La terminal is high level, the starter switch detection Star terminal is grounded, the starter control Sout terminal is suspended, and the fault indication terminal Indicate turns on the corresponding indicator light according to the fault type.

[0111] 5. When parking

[0112] When the car is parked, the indicator light switch is disconnected, and the MCU master control unit detects the start switch disconnection signal through the Star_detc terminal of the MCU, and the MCU master control unit enters the low power consumption working mode through the MCU power supply circuit.

[0113] The output pin status is: the generator speed input Win terminal is suspended, the speed feedback Wout terminal is suspended, the auxiliary load output load terminal is suspended, the generator control La terminal is grounded, the starter switch detection Star terminal is grounded, the starter control Sout terminal is suspended, and the fault indication terminal Indicate turns on the corresponding indicator light according to the fault type.

[0114] In summary, with the help of the above technical solution of the present invention, through a generator and starter controller installed on the engine, that is, the engine electrical controller, the calibration of the generator and starter control logic is completed synchronously during the engine design stage. The calibration content includes: the starting power generation speed of the generator at different ambient temperatures, the soft loading time, the maximum working time of the starter, the exit working speed and other parameters, so that the engine, the generator, and the starter can work in a coordinated manner according to the set method to avoid the adverse effects caused by abnormal user operations. At the same time, through the input and output circuits of the MCU control logic in the controller to perform circuit signal conversion, the problem of non-standardization of detailed parameters such as voltage signal waveform, voltage, current, etc. caused by the circuit structure is solved, and the ideal input and output signal states are realized to solve the matching abnormality problem with the vehicle circuit system.

[0115] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine electrical control method, characterized in that: The control method includes: S1. Based on the input-output relationship between the automobile generator and the starter, build the line connection between the engine electrical controller and the generator, starter and vehicle wiring harness; S2, using the engine electrical controller to monitor the speed signal of the generator, the indicator light switch signal and the starter on signal in real time, and based on the monitoring results of the speed signal, the indicator light switch signal and the starter on signal, controlling the switching of the working modes of the starter and the generator, and recording the working time of the starter; S3. During the normal operation of the automobile engine, the changes of the power supply voltage and the speed signal are monitored in real time, the working mode switching of the generator is controlled, and the fault information of the control process is output through threshold analysis; S4. Real-time monitoring of the indicator light switch signal and the speed signal. When the start switch and the indicator light switch are disconnected and the speed is zero, it is determined that the vehicle is switched from the running state to the stopped state, and the engine electrical controller is switched to the low power consumption mode.

2. The engine electrical control method according to claim 1, characterized in that: The circuits of the engine electrical controller include a starter control input line, a charging indicator light control line, an engine speed signal output line and an auxiliary load output line facing the vehicle wiring harness, and a starter control output line, a generator control output line and a generator speed signal input line facing the starter and generator.

3. The engine electrical control method according to claim 1, characterized in that: The method of using the engine electrical controller to monitor the generator's revolution signal, indicator light switch signal, and starter on signal in real time, controlling the starter and generator's working mode switching based on the monitoring results of the revolution signal, indicator light switch signal, and starter on signal, and recording the starter working time comprises the following steps: S21, based on the speed signal, indicator light switch signal and starter on signal obtained by real-time monitoring, control the engine electrical controller to execute the working mode switch and exit the low power consumption mode; S22, after the input indicator light switch is closed, the indicator light switch signal is triggered. After receiving the indicator light switch signal, the engine electrical controller uses the charging indicator light control line to turn on the indicator light, and controls the generator to enter the external control forced pre-excitation state through the generator control output line; S23, after the starter switch at the input end is turned on, the starter on signal is triggered, the engine electrical controller receives the starter on signal, combines the change of the speed signal, controls the switching of the starter's working mode, and responds to the starter's protection mechanism according to the ambient temperature and working time of the starter.

4. The engine electrical control method according to claim 3, characterized in that: When the engine electrical controller does not detect a speed signal, the engine electrical controller is in a low power consumption mode. When the engine electrical controller detects at least one of a speed signal, an indicator light switch signal or a starter on signal, the engine electrical controller exits the low power consumption mode.

5. The engine electrical control method according to claim 3, characterized in that: After the starter switch at the input end is turned on, a starter on signal is triggered. The engine electrical controller receives the starter on signal, controls the starter working mode switching in combination with the change of the speed signal, and responds to the starter protection mechanism according to the ambient temperature and working time of the starter operation, including the following steps: S231, after receiving the starter on signal, the engine electrical controller uses the starter control output line to control the starter to enter the working state, and outputs a PWM signal with a fixed duty cycle through the generator control output line to control the generator to enter the external control forced pre-excitation state; S232, using a timer to record the working time of the starter after it enters the working state, after the engine electrical controller receives the generator speed signal, it converts it into the engine speed, and after the engine speed reaches a preset speed threshold or the working time reaches a preset duration, the starter is turned off using the starter control output line to control the starter to exit the working state; S233, monitoring the current ambient temperature, querying the preset maximum start time threshold of the starter at the current temperature according to the current ambient temperature, and when the start time is greater than the threshold, triggering the starter fault indication and protection mechanism, outputting the starter fault information and exiting the current operation; S234, detecting a battery voltage drop value when the starter is started, and when the voltage drop value exceeds a voltage drop threshold, triggering a battery fault indication, and outputting battery fault information.

6. The engine electrical control method according to claim 5, characterized in that: The protection mechanism of the starter is to control the delay between the starter's exit from operation and continuous starting through the starter control output line after the starter reaches the maximum working time.

7. The engine electrical control method according to claim 3, characterized in that: During the normal operation of the automobile engine, the changes of the power supply voltage and the speed signal are monitored in real time, the working mode switching of the generator is controlled, and the fault information of the control process is output through threshold analysis, which includes the following steps: S31, converting the generator speed signal into an engine speed signal, and controlling the generator to switch to a normal power generation mode through a generator control output line by comparing the engine speed signal with the idle speed and delay threshold at a preset temperature; S32, monitoring the power supply voltage during the operation of the generator, and when the power supply voltage exceeds the voltage threshold range, triggering the generator fault indication by controlling the opening and closing of the indicator light, and outputting the generator fault information.

8. The engine electrical control method according to claim 7, characterized in that: The converting of the generator speed signal into the engine speed signal, and controlling the generator to switch to the normal power generation mode through the generator control output line by comparing the engine speed signal with the idle speed and the delay threshold at a preset temperature, comprises the following steps: If the current engine speed signal is greater than the preset idle speed and delay threshold, the engine electrical controller controls the generator to exit the external control forced pre-excitation mode through the generator control output line and execute the normal power generation mode.

9. An engine electrical controller, used to implement the engine electrical control method according to any one of claims 1 to 8, characterized in that: An engine electrical controller connected to the generator, the starter and the vehicle wiring harness is included, and the engine electrical controller includes: an MCU master control unit, an MCU power supply circuit, a starter control circuit, a B+ voltage sampling circuit, a temperature detection circuit, an indicator light control circuit, a generator speed input circuit, a Wout signal output circuit, a generator control output circuit and an auxiliary load control circuit; Among them, the MCU main control unit is connected to the MCU power supply circuit, the MCU main control unit is connected to the starter control circuit, the MCU main control unit is connected to the B+ voltage sampling circuit, the MCU main control unit is connected to the temperature detection circuit, the MCU main control unit is connected to the indicator light control circuit, the MCU main control unit is connected to the generator speed input circuit, the MCU main control unit is connected to the Wout signal output circuit, the MCU main control unit is connected to the generator control output circuit, and the MCU main control unit is connected to the auxiliary load control circuit.

10. An engine electrical controller according to claim 9, characterized in that: The circuits of the engine electrical controller include a starter control input line, a charging indicator light control line, an engine speed signal output line and an auxiliary load output line facing the vehicle wiring harness, and a starter control output line, a generator control output line and a generator speed signal input line facing the starter and generator.

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