TWI541432B - Engine starter - Google Patents

Description

Engine starter

The present invention relates to an engine starting device, and more particularly to an engine starting device that does not require a Hall sensor and can normally start the engine.

In order to cater to the trend of energy saving and carbon reduction, more and more vehicles are equipped with an automatic engine control system for automatic flameout and start-up. In the above engine control system, an integrated starter generator (ISG) is mainly included. The starting power generating device can be driven by electric power to drive an engine or be driven by the engine to generate electricity as a generator. When the integrated starting power generating device is combined with other suitable driving devices, the related operations of idle automatic firing and starting can be completed.

The integrated starting power generating device mainly comprises a motor, and the motor has a stator and a rotor. When the motor for driving the integrated starting power generating device is to be operated, the rotor position must first be detected. In general, the motor of the integrated starting power generating device is usually provided with a Hall sensor to determine the rotor position by the signal of the Hall sensor and input the corresponding phase current at the correct commutation point, thereby The integrated start-up power generation device is smoothly driven, and the integrated power generation device is driven to drive the engine.

However, setting the Hall sensor in the integrated start-up power generation device will increase the additional installation cost; and the Hall sensor can only judge the rotation state of the motor of the integrated start-up power generation device, and cannot accurately know the current state of the engine. The operating state makes the integrated start-up power generation device unable to quickly change from the startup mode to the power generation mode, which easily causes the engine to be abnormal during the startup process.

In view of this, it is necessary to improve the conventional engine starting device to solve the problems of high installation cost and unsuccessful starting of the conventional engine starting device.

It is an object of the present invention to provide an engine starting device that reduces overall installation costs.

Another object of the present invention is to provide an engine starting device that improves the smoothness of engine starting.

In order to achieve the foregoing object, the technical means used in the present invention include:

An engine starting device includes: an engine; a battery for storing power or providing power required by the engine; and an integrated starting power generating device coupled to the engine to drive the engine or receive the engine An engine drive, the integrated start-up power generating device has a motor having a three-phase winding, and a microprocessor coupled to the integrated start-up power generating device for detecting a response reference value of the integrated start-up power generating device And responsive to the response reference value to generate an adjustment signal; and a power adjustment unit coupled to the battery, the integrated startup power generation device, and the microprocessor to receive the adjustment signal of the microprocessor, and according to The adjustment signal adjusts power transmission between the battery and the integrated start-up power generation device; wherein the response reference value comprises: a first set of three-phase voltage generated by the three-phase winding after the motor is powered on in a static state And a first set of three-phase current values, and a second set of three-phase generated by the three-phase winding when the motor is rotating and simultaneously driving the engine Pressure value and a second set of three-phase current value.

The engine control module is coupled to the engine and can output a control signal to control the operation of the engine.

The engine control module is coupled to the microprocessor, and the engine control module outputs a corresponding feedback signal to the microprocessor when the control signal is output, when the microprocessor receives the feedback signal. Then, the response reference value and the feedback signal are simultaneously operated to generate the adjustment signal.

Accordingly, the engine starting device of the present invention can detect the response reference value of the integrated starting power generating device by the microprocessor, and receive the feedback signal of the engine control module to reduce the setting cost and the smoothness of the engine starting. .

〔this invention〕

1‧‧‧ engine

2‧‧‧Battery

3‧‧‧Integrated start-up power generation unit

4‧‧‧Microprocessor

5‧‧‧Power adjustment unit

6‧‧‧Engine Control Module

A‧‧‧Wind phase

B‧‧‧Wind phase

C‧‧‧Wind phase

Figure 1: Block diagram of the engine starting device of the present invention.

Fig. 2 is a partial circuit diagram of the engine starting device of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The term "coupled" as used throughout the specification means that the two devices are mechanically or electrically connected. For example, a motor is coupled to an engine through a crankshaft to enable the motor to operate synchronously with the engine. Or a microprocessor is coupled to a power adjustment unit to enable the microprocessor to transmit an electrical signal to the power adjustment unit.

As shown in FIG. 1 , the engine starting device of the present invention comprises an engine 1 , a battery 2 , an integrated starting power generating device 3 , a microprocessor 4 and a power adjusting unit 5 , and the integrated starting power generating device 3 is coupled to the The engine 1 is coupled to the integrated starting power generating device 3, and the power adjusting unit 5 is coupled to the battery 2, the integrated starting power generating device 3, and the microprocessor 4.

The engine 1 is a conventional power mechanism having a cycle of an intake stroke, a compression stroke, an explosion stroke, and an exhaust stroke. The battery 2 is a power storage device having a power supply function and a power storage function. In the present embodiment, the battery 2 is used to supply electric power required for the operation of the engine 1.

The integrated starter power generating device 3 is coupled to the engine 1 to drive the engine 1 or be driven by the engine 1.

More specifically, the integrated starter power generating device 3 has a motor having The three-phase winding, when the integrated starting power generating device 3 receives the power of the battery 2, the three-phase winding can be driven to rotate by electric power. In addition, the integrated start-up power generation device 3 is coupled to the engine 1 by a crankshaft, and the integrated start-up power generation device 3 has a start mode and a power generation mode. When the integrated start-up power generation device 3 is in the startup mode, the integrated start-up power generation The device 3 can drive the engine 1 through the crankshaft. After the engine 1 is successfully ignited and started, the integrated starter power generating device 3 can be driven by the engine 1 to enable the integrated start-up power generating device 3 to enter the power generating mode to generate electric power. And storing the power in the battery 2.

The microprocessor 4 is coupled to the integrated startup power generation device 3 for detecting a response reference value of the integrated startup power generation device 3, and calculating the response reference value to generate an adjustment signal.

More specifically, when the integrated starting power generating device 3 is to start running from a stationary state, the rotor position must be detected first to determine the correct commutation point of the three-phase winding, and the phase can be input at the correct commutation point. The corresponding current, and thus the integrated start-up power generation device 3, is smoothly driven. In this embodiment, in the startup step of the first stage, when the integrated startup power generation device 3 is in a stationary state, the microprocessor 4 first sends a start signal to enable the power of the battery 2 to pass through the power. The adjusting unit 5 is transmitted to the integrated starting power generating device 3 to excite the three-phase winding of the motor of the integrated starting power generating device 3. The excited three-phase winding may generate a first group of three due to the effect of the counter electromotive force. a phase voltage value and a first set of three-phase current values, the first set of three-phase voltage values and the first set of three-phase current values can be used as the response reference value, when the microprocessor 4 detects the first group After the three-phase voltage value and the first three-phase current value, the current rotation state of the three-phase winding can be judged according to the fluctuation of the three phase voltage values and the three phase current values, and the correct calculation is performed thereby The commutation point is output, and the corresponding adjustment signal is output to control the current operation of the power adjustment unit 5 to smoothly drive the motor of the integrated start-up power generation device 3. Thereby, the microprocessor 4 can directly calculate the commutation point from the three-phase voltage value and the three-phase current value of the motor of the integrated power generating device 3, without separately setting a Hall sensor to sense the rotor position, and the same Smooth Driving the integrated start-up power generation device 3 has the effect of reducing the installation cost.

The power adjustment unit 5 is coupled to the battery 2, the integrated startup power generation device 3, and the microprocessor 4 to receive the adjustment signal of the microprocessor 4, and adjust the battery 2 and the integrated startup according to the adjustment signal. Power transmission between the power generating devices 3.

Referring to FIG. 2, the power adjustment unit 5 is composed of six transistors, and is coupled to one winding phase A, one winding phase B and one winding phase C of the integrated startup power generating device 3, and the six The transistor is also coupled to the microprocessor 4. With the above arrangement, the adjustment signal of the microprocessor 4 can control the on and off of the six transistors, thereby changing the flow of the battery 2 into the integrated startup power generation device 3. The current, or the current flowing into the battery 2 by the integrated starting power generating device 3.

More specifically, when the integrated start-up power generation device 3 is operated after the first-stage start-up step and is normally operated, the second-stage driving step can be entered. In the driving step, when the integrated starting power generating device 3 is to drive the engine 1 by the crankshaft, the rotational torque of the integrated starting power generating device 3 must be greater than the internal pressure of the cylinder of the engine 1, and the engine 1 cylinder The internal pressure also affects the voltage value and the current value of the integrated starting power generating device 3 during operation. Therefore, the microprocessor 4 is connected to the motor of the integrated starting power generating device 3 while rotating and simultaneously driving the engine 1. Measuring a second set of three-phase voltage values and a second set of three-phase current values generated by the three-phase winding, and estimating the engine 1 according to the second set of three-phase voltage values and the second set of three-phase current values Stopping the position and outputting the adjustment signal to the power adjustment unit 5 to control the integrated start power generation device 3 to stop the engine 1 control at a standby starting position, for example, stopping the engine 1 at an exhaust stroke or an intake stroke In order to reduce the starting torque or starting current of the engine 1, thereby improving the smoothness of starting the engine. Thereby, the microprocessor 4 can estimate the position of the engine 1 according to the three-phase voltage value and the three-phase current value when the integrated power generating device 3 drives the engine 1, and stop the engine 1 control at an appropriate standby starting position. It has the effect of improving the smoothness of the start of the engine 1.

The engine starting device of the present invention further has an engine control module 6 coupled to the engine 1 and capable of outputting a control signal to control the operation of the engine 1. In this embodiment, the engine control module 6 is a component of any engine control unit (ECU), and is used for performing air intake, oil supply, ignition, etc. on the engine 1 to make the engine 1 The control signal is smoothly launched, wherein the control signal includes an intake signal, an oil supply signal and an ignition signal.

In this embodiment, the engine control module 6 is coupled to the microprocessor 4, and the engine control module 6 outputs a corresponding feedback signal to the microprocessor 4 when the control signal is outputted. After receiving the feedback signal, the microprocessor 4 simultaneously calculates the response reference value and the feedback signal to generate the adjustment signal. In this embodiment, the feedback signal includes an intake feedback signal, an oil supply feedback signal, and an ignition feedback signal, and the control signal output by the engine control module 6 has a corresponding relationship with the feedback signal system, for example, when When the engine control module 6 outputs the intake signal, the engine feedback signal is simultaneously output to the microprocessor 4.

More specifically, when the engine 1 has stopped at the appropriate standby position, it can enter the third stage of the launching step. In the starting step, the engine control module 6 continuously outputs the intake signal, the fuel supply signal and the ignition signal to start the engine 1, and the engine control module 6 simultaneously outputs the corresponding feedback signal to The microprocessor 4, at this time, the microprocessor 4 can learn the current state of the engine 1 by using the feedback signal, and simultaneously calculate the response reference value and the feedback signal to generate the adjustment signal to Changing the power transmission state of the power adjustment unit 5, and changing the integrated startup power generation device 3 from the startup mode to the power generation mode, causing the integrated startup power generation device 3 to be driven by the engine 1 as a generator, and generating The electric power is stored to the battery 2 through the power adjustment unit 5. Thereby, the microprocessor 4 can judge the state of the engine 1 according to the feedback signal, and make the process of converting the integrated start power generating device 3 from the startup mode to the power generation mode smoother, and improve the operation of the engine starting device of the present invention. Smooth effect.

In addition, when the engine control module 6 of the engine starting device of the present invention does not output the corresponding feedback signal to the microprocessor 4, the microprocessor 4 can also determine the integrated startup power generating device by using a conventional detection program. 3 The point in time from the startup mode to the power generation mode, and the conventional detection procedure is familiar to those skilled in the art and will not be described herein.

In summary, the engine starting device of the present invention can detect the three-phase voltage and the three-phase current of the three-phase winding of the integrated starting power generating device 3 by the microprocessor 4, and can eliminate the need for adding a Hall sensor. Under the condition, the rotor position can be smoothly detected and the integrated start-up power generation device 3 can be driven, which has the effect of reducing the installation cost.

In addition, the engine starting device of the present invention can detect the three-phase voltage and the three-phase current of the three-phase winding of the integrated starting power generating device 3 by the microprocessor 4, and simultaneously refer to the output of the engine control module 6 The feedback signal stops the control of the engine 1 in the standby starting position, and smoothly switches the working mode of the integrated starting power generating device 3, and has the effect of improving the smoothness of the engine starting.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧ engine

2‧‧‧Battery

3‧‧‧Integrated start-up power generation unit

4‧‧‧Microprocessor

5‧‧‧Power adjustment unit

6‧‧‧Engine Control Module

Claims (3)

An engine starting device includes: an engine; a battery for storing power or providing power required for operation of the engine; and an integrated start-up power generating device coupled to the engine to drive the engine or The engine is driven, the integrated starting power generating device has a motor having a three-phase winding, and a microprocessor coupled to the integrated starting power generating device for detecting a response reference of the integrated starting power generating device And calculating a response reference value to generate an adjustment signal; and a power adjustment unit coupled to the battery, the integrated startup power generation device, and the microprocessor to receive the microprocessor Adjusting a signal, and adjusting power transmission between the battery and the integrated starting power generating device according to the adjusting signal; wherein the response reference value comprises: a first phase generated by the three-phase winding after the motor is powered in a stationary state a set of three-phase voltage values and a first set of three-phase current values, and the three-phase windings when the motor is rotating and simultaneously driving the engine A second three-phase voltage values and a second set of three-phase current value raw. The engine starting device of claim 1, wherein the engine control module is coupled to the engine and outputs a control signal to control the operation of the engine. The engine starting device of claim 2, wherein the engine control module is coupled to the microprocessor, and the engine control module outputs a corresponding feedback signal to the controller when outputting the control signal The microprocessor, when the microprocessor receives the feedback signal, simultaneously calculates the response reference value and the feedback signal to generate the adjustment signal.