JP6702281B2 - Stop control system - Google Patents

Description

The present invention relates to a stop control system that performs control for stopping an engine.

Conventionally, so-called idling stop control is known in which an engine is automatically stopped when a predetermined automatic stop condition is satisfied. According to this control, it is possible to improve the fuel consumption reduction effect of the engine.

However, even if the fuel supply to the engine is stopped due to the establishment of a predetermined automatic stop condition, the engine does not stop immediately, but after idling according to inertia, the engine stops. For this reason, the time from when the fuel supply to the engine is stopped until the engine is completely stopped becomes longer, and the fuel remaining in the intake port decreases, so the initial explosion at restart is delayed, There is a possibility that problems such as deterioration of startability may occur.

As a countermeasure against this, in Patent Document 1, when the engine is automatically stopped due to the establishment of the automatic stop condition, the motor included in the hybrid vehicle is controlled to generate electric power. The engine can be stopped quickly because a load is applied to the engine by the electric power generation operation of the motor and the rotation speed of the engine can be rapidly reduced.

Japanese Patent No. 3909641

By the way, Patent Document 1 describes that the power generation operation of the motor is stopped when the rotational speed of the engine becomes substantially zero. However, when the rotational speed of the engine decreases and the generated voltage of the motor becomes less than the voltage of the power source provided in the vehicle, there is a possibility that the motor cannot perform the power generation operation. In this case, the motor cannot give a braking torque to the engine, and the engine cannot be stopped quickly. Even if the power generation operation of the motor could be carried out, the braking torque given to the engine by the motor is considered to be small, and there is a possibility that the time until the engine is completely stopped becomes long.

The present invention has been made to solve the above problems, and its main purpose is to be able to apply a braking torque to an engine during a stop control of the engine up to a region where the rotation speed of the engine is lower. To provide a stop control system.

A first aspect of the present invention is an engine that generates a driving force by combustion of fuel, a rotating electric machine module having a rotating electric machine that can generate power by the driving force of the engine, and charging is performed by electric power supplied by the rotating electric machine module. A stop control system comprising: a power supply; and a control for stopping the engine, wherein an induced current generated in the rotating electric machine does not pass through the power supply after combustion of the fuel by the engine is stopped. It is characterized by forming a flowing closed circuit.

In order to realize a quick stop of the engine, after the combustion of the fuel by the engine is stopped, power generation may be performed by the rotating electric machine to apply the braking torque of the rotating electric machine to the engine. The magnitude of the induced electromotive force generated in the rotating electric machine depends on the rotation speed of the engine. For this reason, when the rotational speed of the engine decreases and the induced electromotive voltage generated in the rotating electric machine becomes smaller than the voltage of the power supply, the induced current generated in the rotating electric machine cannot be supplied to the power supply, and power generation by the rotating electric machine cannot be performed. There is a risk. In this case, the rotating electric machine cannot apply the braking torque to the engine, and cannot stop the engine quickly. Even if the rotating electric machine can generate electricity, the braking torque given to the engine by the rotating electric machine is considered to be small, and there is a possibility that the time until the engine completely stops becomes long.

As a countermeasure against this, in the present stop control system, after the combustion of fuel by the engine is stopped, a closed circuit in which an induced current generated in the rotating electric machine flows without passing through a power source is formed. As a result, even if the rotational speed of the engine decreases and the induced electromotive voltage generated in the rotating electric machine becomes smaller than the voltage of the power supply, the induced current generated in the rotating electric machine flows in the formed closed circuit. A braking torque can be applied to. That is, the braking torque can be applied to the engine even in a region where the rotation speed of the engine is lower, so that the engine can be stopped quickly. Further, in a system that automatically stops and automatically restarts the engine, the engine restart timing can be advanced as the engine is quickly stopped. Therefore, the restartability of the engine can be improved.

In a second aspect based on the first aspect, the rotating electric machine includes a field winding and a current adjusting section that adjusts a magnitude of a current flowing through the field winding. During the period when the closed circuit is formed, the magnitude of the current flowing through the field winding is adjusted so that the braking torque applied to the engine does not exceed a predetermined torque.

When this control is performed when the engine speed is high, the magnitude of the braking torque applied to the engine is larger than when the closed circuit is not formed, because the closed circuit is formed without the power supply. Will be things. For this reason, when the engine and the rotating electric machine are drivingly connected by a belt or the like, for example, when this control is performed in a state where the engine rotation speed is high, the magnitude of the braking torque applied to the engine becomes excessively large. It is conceivable that a so-called "belt squeal" that causes abnormal noise from the belt occurs. As a countermeasure against this, during the period when the closed circuit is formed, the magnitude of the current flowing through the field winding is adjusted by the adjusting unit so that the braking torque applied to the engine does not exceed a predetermined torque. As a result, the magnitude of the braking torque applied to the engine can be adjusted to be smaller than the predetermined torque, and the occurrence of problems such as “belt squeal” can be suppressed.

In a third aspect based on the first or second aspect, the rotating electric machine includes an armature winding and an induction current adjusting unit that adjusts the magnitude of the average current of the induction current flowing through the armature winding. , The induced current adjusting unit controls the average current of the induced currents to flow in the armature winding so that the braking torque applied to the engine does not become larger than a predetermined torque during a period in which the closed circuit is formed. It is characterized by adjusting the size.

As another method of controlling so that the braking torque applied to the engine does not exceed the predetermined torque, the magnitude of the average current of the induced current flowing through the armature winding may be adjusted. As a result, the magnitude of the induced current generated in the multi-phase rotating electric machine can be limited, and eventually, the braking torque applied to the engine can be suppressed from becoming larger than the predetermined torque.

In a fourth aspect based on any one of the first to third aspects, when the rotation speed of the engine is higher than a predetermined rotation speed after the combustion of the fuel by the engine is stopped, the rotating electric machine generates electricity. And the closed circuit is formed when the rotation speed of the engine is lower than the predetermined rotation speed.

When the rotary electric machine is charged without forming a closed circuit, the magnitude of the braking torque applied to the engine depends on the magnitude of the induced current generated in the rotary electric machine. In a situation where the rotation speed of the engine is higher than the predetermined rotation speed, it is considered that the braking torque applied to the engine is sufficiently large even if the power supply is charged by the electric power supplied by the rotating electric machine. Therefore, when the rotation speed of the engine is higher than the predetermined rotation speed, it is possible to apply the braking torque to the engine and charge the power supply by causing the rotating electric machine to generate power.

On the other hand, when the rotation speed of the engine is lower than the predetermined rotation speed, the magnitude of the induced current generated in the rotating electric machine by the power generation is also small, and the magnitude of the braking torque applied to the engine by the rotating electric machine is small accordingly. It is believed that Therefore, when the rotation speed of the engine is lower than the predetermined rotation speed, a closed circuit that does not pass through the power supply is formed. As a result, the induced current generated in the rotating electric machine does not decrease, and it is possible to prevent the braking torque applied to the engine by the rotating electric machine from decreasing.

5th invention is applied to the vehicle which has the automatic stop function which stops the said engine automatically when predetermined automatic stop conditions are satisfied in any 1st thru|or 4th invention, The said automatic stop conditions are It is characterized in that the closed circuit is formed after being established and after the combustion of the fuel by the engine is stopped.

For vehicles with an automatic stop function that automatically stops the engine when a predetermined automatic stop condition is satisfied (for example, an idling stop vehicle), automatic stop and restart frequently occur when turning an intersection or when traffic is congested. Conceivable. In an automatically stopped vehicle equipped with the present stop control system, the engine can be quickly stopped in such a situation and the engine can be restarted early. That is, it can be said that it is particularly suitable to apply this stop control system to an automatically stopped vehicle.

In a sixth aspect based on any one of the first to fifth aspects, the rotary electric machine module is a polyphase rotary electric machine, and at least some of the plurality of phases included in the multiphase rotary electric machine are The first switching element is provided with a plurality of first switching elements capable of performing an opening/closing operation so as to be short-circuited, and the first switching element is opened/closed so that at least some of the plurality of phases of the polyphase rotating electric machine are short-circuited with each other. The closed circuit is formed by the operation.

It is assumed that this stop control system is applied to a polyphase rotating electric machine. In this case, the polyphase rotating electric machine is provided with a plurality of first switching elements that can be opened and closed so that at least some of the plurality of phases of the polyphase rotating electric machine are short-circuited. As a result, after the combustion of the fuel by the engine is stopped, the first switching element is opened/closed so that at least some of the plurality of phases of the multi-phase rotating electric machine are short-circuited, and the power is supplied via the power supply. Not closed circuits can be formed.

In a seventh aspect based on the sixth aspect, the duty ratio of the first switching element is adjusted so that the braking torque applied to the engine does not become larger than a predetermined torque during the period of forming the closed circuit. It is characterized by doing.

As another method of controlling so that the braking torque applied to the engine does not exceed a predetermined torque, the duty ratio of the first switching element may be adjusted. As a result, the magnitude of the induced current generated in the multi-phase rotating electric machine can be limited, and by extension, the braking torque applied to the engine can be prevented from becoming larger than the predetermined torque. In addition, it is possible to suppress overheating of the first switching element by suppressing the flow of an excessively large induced current in the first switching element.

An eighth invention is the sixth or seventh invention, wherein after the combustion of the fuel by the engine is stopped, a plurality of the first switching elements are opened/closed so that all the phases of the polyphase rotating electric machine are short-circuited. It is characterized in that

By opening and closing the plurality of first switching elements so that all the phases of the multi-phase rotating electric machine are short-circuited, the fluctuation of the braking torque applied to the engine can be reduced.

In a ninth aspect based on any one of the first to fifth aspects, the rotating electrical machine module is an alternator, includes a rectifying unit that rectifies the induced current generated by power generation, and is rectified by the rectifying unit. A stop control system configured to cause the induced current to flow to the power supply, wherein a second switching element that opens and closes between the power supply and the rectification unit, and between the second switching element and the rectification unit. A connection path connecting the positive electrode side and the negative electrode side of the rectification unit by bypassing the power supply, the connection path comprising a third switching element for opening and closing the connection path, and the third switching element. The closed circuit is formed by closing the element, and the second switching element is opened when the closed circuit is formed.

In the stop control system configured as described above, by closing the third switching element, it is possible to form a closed circuit in which the induced current generated in the alternator flows in the connection path without passing through the power supply. However, in this state, the current flowing from the power supply also flows in the connection path. Therefore, when the closed circuit is formed by closing the third switching element, the second switching element is opened. As a result, the inflow of current from the power supply to the connection path can be blocked.

In a tenth aspect based on the ninth aspect, the rectifying section, the connection path, and the field winding of the alternator are connected in parallel to the power supply, and the connection path includes a resistor. Is characterized by.

The rectifier, the connection path, and the field winding of the alternator are connected in parallel to the power supply. In this case, the magnitude of the voltage applied to the field winding is the same as the magnitude of the voltage applied to the connection path. There is a risk that a sufficient voltage cannot be applied and a sufficient current cannot flow in the field winding. In preparation for this, by providing a resistor in the connection path, the voltage applied to the field winding can be increased, and a sufficient current can flow in the field winding. It can be made sufficiently large.

In an eleventh invention according to any one of the first to fifth inventions, the rotary electric machine module includes a three-phase armature winding and a three-phase armature winding in a first system and a second system, respectively. Three switching elements connected in a three-phase bridge, and when forming the closed circuit, three switching elements on the high voltage side of the six switching elements in the first system and the second system Is closed and three switching elements on the low voltage side are opened, or in the first system and the second system, three switching elements on the high voltage side among the six switching elements are opened and three switching elements on the low voltage side are opened. It is characterized by closing two switching elements.

The rotary electric machine module includes a three-phase armature winding and six switching elements that are three-phase bridge-connected to the three-phase armature winding in the first system and the second system, respectively. In this case, in the first system and the second system, a closed circuit is formed in each system by closing three switching elements on the high voltage side and opening three switching elements on the low voltage side among the six switching elements. can do. Thereby, the braking torque can be applied to the engine in each system, and the heat load (heat load applied to each switching element) per system can be reduced. Further, in the first system and the second system, when the three switching elements on the high voltage side among the six switching elements are opened and the three switching elements on the low voltage side are closed, the same effect can be obtained. it can.

In a twelfth aspect based on any one of the first to fifth aspects, the rotary electric machine module includes a three-phase armature winding and six switching elements connected to the three-phase armature winding in a three-phase bridge connection. A first state in which three high-voltage side switching elements of the six switching elements are closed and three low-voltage side switching elements are opened when the closed circuit is formed; It is characterized by alternately switching between the second state in which the three switching elements on the side are opened and the three switching elements on the low voltage side are closed.

The rotating electrical machine module includes a three-phase armature winding and six switching elements connected to the three-phase armature winding by a three-phase bridge. In this case, as the first state, a closed circuit can be formed by closing three switching elements on the high voltage side and opening three switching elements on the low voltage side among the six switching elements. As the second state, a closed circuit can be formed by opening three switching elements on the high voltage side and closing three switching elements on the low voltage side among the six switching elements. Then, when the closed circuit is formed, the first state and the second state are alternately switched, so that the heat load is distributed to the three switching elements on the high voltage side and the three switching elements on the low voltage side. You can

A thirteenth invention is the invention of any one of the first to fifth inventions, wherein the rotary electric machine module includes a three-phase armature winding and a three-phase armature winding in the first system and the second system, respectively. Three switching elements connected in a three-phase bridge, and when forming the closed circuit, three switching elements on the high voltage side of the six switching elements in the first system and the second system And a third state in which the three switching elements on the low voltage side are closed, and in the first system and the second system, three switching elements on the high voltage side among the six switching elements are opened and the low voltage side is opened. The second state in which the three switching elements are closed is alternately switched.

The rotary electric machine module includes a three-phase armature winding and six switching elements that are three-phase bridge-connected to the three-phase armature winding in the first system and the second system, respectively. In this case, as the first state, in the first system and the second system, by closing three switching elements on the high voltage side and opening three switching elements on the low voltage side among the six switching elements, Each can form a closed circuit. In addition, as a second state, in the first system and the second system, by opening three switching elements on the high voltage side and closing three switching elements on the low voltage side among the six switching elements, each of the switching systems is closed. A closed circuit can be formed. Then, when the closed circuit is formed, since the first state and the second state are alternately switched, three switching elements on the high-voltage side of each system and three switching elements on the low-voltage side of each system, The heat load can be dispersed.

A fourteenth invention is the invention of any one of the first to fifth inventions, wherein the rotary electric machine module includes a three-phase armature winding and a three-phase armature winding in the first system and the second system, respectively. Six switching elements connected in a three-phase bridge, and when forming the closed circuit, in the first system, three switching elements on the high voltage side of the six switching elements are closed and a low voltage is applied. A first state in which the three switching elements on the side are opened and the six switching elements in the second system are opened, and the six switching elements in the first system are opened, and the six switching elements in the second system are opened. It is characterized by alternately switching between a second state in which three switching elements on the high voltage side are closed and three switching elements on the low voltage side are opened among the switching elements.

The rotary electric machine module includes a three-phase armature winding and six switching elements that are three-phase bridge-connected to the three-phase armature winding in the first system and the second system, respectively. In this case, as the first state, in the first system, by closing the three switching elements on the high voltage side and opening the three switching elements on the low voltage side among the six switching elements, the high voltage side of the first system At, a closed circuit can be formed. In addition, as a second state, in the second system, by closing three switching elements on the high voltage side and opening three switching elements on the low voltage side among the six switching elements, the high voltage side of the second system is closed. A closed circuit can be formed. Then, when the closed circuit is formed, the first state and the second state are alternately switched, so that three switching elements on the high voltage side of the first system and three switching elements on the high voltage side of the second system In addition, the heat load can be dispersed.

A fifteenth invention is the invention of any one of the first to fifth inventions, wherein the rotary electric machine module includes a three-phase armature winding and a three-phase armature winding in the first system and the second system, respectively. Six switching elements connected in a three-phase bridge are provided, and when forming the closed circuit, in the first system, three switching elements on the high voltage side of the six switching elements are opened and low voltage is applied. The three switching elements on the side are closed and the six switching elements are opened in the second system, and the six switching elements are opened in the first system, and the six switching elements are opened in the second system. It is characterized by alternately switching between a second state in which three switching elements on the high voltage side among the switching elements are opened and three switching elements on the low voltage side are closed.

In the fifteenth invention, according to the fourteenth invention, the heat load can be distributed to the three low-voltage side switching elements of the first system and the three low-voltage side switching elements of the second system. ..

In a sixteenth invention according to any one of the twelfth to fifteenth inventions, when the rotation speed of the engine periodically reaches a maximum value and a minimum value, the rotation speed reaches the minimum value. It is characterized by switching between the first state and the second state.

When switching between the first state and the second state, for example, if a dead time for preventing a short circuit between the high voltage side switching element and the low voltage side switching element is provided, a period in which a closed circuit is not formed occurs. .. The braking torque cannot be applied to the engine during the period when the closed circuit is not formed. By the way, the rotational speed of the engine periodically has a maximum value and a minimum value. Then, at the time when the rotation speed of the engine reaches the minimum value, the braking torque applied to the engine by the rotating electric machine becomes relatively small. In this respect, since the first state and the second state are switched at the time when the rotation speed of the engine becomes the minimum value, the first state and the second state are suppressed while suppressing the influence that the braking torque cannot be applied to the engine. Can be switched. Further, even when the first state and the second state are switched at the time when the rotation speed of the engine becomes 0, the same operational effect can be obtained.

In a seventeenth invention according to any one of the first to fifth inventions, the rotary electric machine module includes a three-phase armature winding and a three-phase armature winding in the first system and the second system, respectively. Six switching elements connected in a three-phase bridge, and when forming the closed circuit, in the first system, three switching elements on the high voltage side of the six switching elements are closed and a low voltage is applied. A first state in which the three switching elements on the side are opened and the six switching elements in the second system are opened, and the six switching elements in the first system are opened, and the six switching elements in the second system are opened. A second state in which three switching elements on the high voltage side are closed and three switching elements on the low voltage side are opened among the switching elements, and three switching elements on the high voltage side among the six switching elements in the first system A third state in which the elements are opened and the three switching elements on the low voltage side are closed, and the six switching elements are opened in the second system, and the six switching elements are opened in the first system, and the second In the system, a fourth state in which three switching elements on the high voltage side among the six switching elements are opened and three switching elements on the low voltage side are closed is switched in a predetermined order.

In the seventeenth invention, three switching elements on the high voltage side of the first system that are energized in the first state, three switching elements on the high voltage side of the second system that are energized in the second state, and The heat load can be distributed to the three low-voltage side switching elements of the first system that are energized and the three low-voltage side switching elements of the second system that are energized in the fourth state.

It is a schematic block diagram of the control system which concerns on this embodiment. FIG. 2 is a schematic circuit diagram around the rotary electric machine shown in FIG. 1. It is the figure which showed the mode which the rotary electric machine which concerns on this embodiment can implement. It is the figure which showed the change mode of the parameter when making a rotary electric machine implement a generator mode, when stopping an engine. It is the figure which showed the change aspect of the parameter when making a rotary electric machine implement a brake mode, when stopping an engine. FIG. 3 is a circuit diagram showing control in the case where a closed circuit that does not pass through a battery is formed in the circuit diagram shown in FIG. 2. It is a figure showing the effect which stop control concerning this embodiment brings. 7 is a circuit diagram showing another example of control when forming the closed circuit shown in FIG. 6. FIG. It is a schematic circuit diagram of the rotary electric machine periphery which concerns on another example. It is a schematic circuit diagram of the rotary electric machine periphery which concerns on another example. It is a circuit diagram showing control in the case of forming a closed circuit in two systems. It is a circuit diagram showing another example of control when forming a closed circuit in two systems. It is a circuit diagram showing control in the case of forming a closed circuit in one of two systems. It is a circuit diagram showing another example of control when forming a closed circuit in one of two systems. It is a circuit diagram showing another example of control when forming a closed circuit in one of two systems. It is a circuit diagram showing another example of control when forming a closed circuit in one of two systems.

Hereinafter, the present embodiment that embodies the present invention will be described with reference to the drawings. The stop control system according to the present embodiment is mounted on a vehicle including an engine 10 as a travel drive source. In FIG. 1, an engine 10 is a multi-cylinder internal combustion engine driven by combustion of fuel such as gasoline or light oil, and includes a fuel injection valve 50, an ignition device, and the like as is well known.

A rotary electric machine module 20 is connected to a rotary shaft (not shown) of the engine 10 via a power transmission unit 16 including a pulley and a belt so that power can be transmitted. The rotating electrical machine module 20 is mainly driven as an electric motor when supplying a driving force to the engine 10 or as a generator when converting the driving force of the engine 10 into electric power.

The configuration of the rotary electric machine module 20 will be described with reference to FIG. In the present embodiment, the rotary electric machine module 20 is assumed to be an ISG (Integrated Starter Generator). The rotary electric machine module 20 includes a generator motor 21, a drive circuit 25, and a rotary electric machine control unit 27. The generator motor 21 is connected to a battery (corresponding to a power source) 30 via a drive circuit 25.

The generator motor 21 is a three-phase AC motor generator, and the generator motor 21 includes a stator 22 including three-phase armature windings 22a to 22c and a field winding 23a. And a rotor 23 that is The generator motor 21 is further provided with an adjusting unit (corresponding to a current adjusting unit) 24. Based on a command from the rotating electric machine control unit 27, the adjusting unit 24 causes an exciting current to flow in the field winding 23a included in the rotor 23. Adjust the size of.

The drive circuit 25 is an inverter circuit including a plurality of MOSFETs (corresponding to first switching elements) that are switching elements. Specifically, the drive circuit 25 includes MOSFETs 25a to 25f. One end of the U-phase armature winding 22a of the stator 22 is connected to the connection point of the MOSFETs 25a and 25b. One end of the V-phase armature winding 22b of the stator 22 is connected to the connection point of the MOSFETs 25c and 25d. One end of the W-phase armature winding 22c of the stator 22 is connected to the connection point of the MOSFETs 25e and 25f. The other end of the armature winding 22a, the other end of the armature winding 22b, and the other end of the armature winding 22c are connected to each other at a neutral point. The drive circuit 25 further includes a switch control unit 26, and the switch control unit 26 controls the opening/closing operation of each of the MOSFETs 25a to 25f based on a command from the rotating electric machine control unit 27.

The rotary electric machine control unit 27 is assumed to be a rotary electric machine ECU, and is configured as a microcomputer including a CPU, a ROM, a RAM, an input/output interface, and the like. The rotating electrical machine control unit 27 causes the adjusting unit 24 to adjust the exciting current flowing through the field winding 23a. Thereby, the power generation voltage generated in the rotary electric machine module 20 is adjusted. Further, the rotary electric machine control unit 27 causes the switch control unit 26 to control the opening/closing operation of the MOSFETs 25 a to 25 f included in the drive circuit 25.

Returning to the explanation of FIG. In this system, an engine ECU 40 is provided as a main control device that controls the entire system. The engine ECU 40 is a well-known electronic control device including a microcomputer and the like.

The engine ECU 40 is electrically connected to the rotary electric machine control unit 27 included in the rotary electric machine module 20 (see FIG. 2 ), and plays a role of controlling the rotary electric machine module 20 via the rotary electric machine control unit 27. The rotary electric machine module 20 according to the present embodiment has four functions of a standby mode, a generator mode, an electric motor mode, and a brake mode, as shown in FIG. When the rotating electric machine module 20 is caused to perform the standby mode, the switch controlling unit 26 is controlled via the rotating electric machine control unit 27 so that all the MOSFETs 25a to 25f are opened. When the rotating electric machine module 20 is caused to execute the electric motor mode, the switch controlling unit 26 controls the opening/closing operation of the MOSFETs 25a to 25f via the rotating electric machine control unit 27, so that the DC power supplied from the battery 30 is three-phase. Power is supplied to the stator 22. Further, when the rotating electric machine module 20 is caused to execute the generator mode, the induced electric current generated in the stator 22 is generated by causing the switch control unit 26 to control the opening/closing operation of the MOSFETs 25a to 25f via the rotating electric machine control unit 27. To the battery 30 to charge the battery 30. The brake mode will be described later.

As the sensors, an accelerator sensor 42 for detecting a depression operation amount of an accelerator pedal 41 (hereinafter referred to as an accelerator operation amount) as an accelerator operation member, and a depression operation amount of a brake pedal 43 (hereinafter referred to as a brake operation amount). A brake sensor 44 for detecting, a rotation speed sensor 45 for detecting the rotation speed of the rotation shaft of the engine 10, and the like are provided. Detection signals from these sensors are sequentially input to the engine ECU 40. It should be noted that although sensors other than these sensors are provided in the present system, they are not shown.

The engine ECU 40 performs control such as fuel injection amount control by the fuel injection valve 50 and ignition control by the ignition device based on the detection result of each sensor and the like.

Further, the engine ECU 40 executes idling stop control for automatically stopping the engine 10 when a predetermined automatic stop condition is satisfied while the vehicle is traveling. Then, the fuel supply to the engine 10 by the fuel injection valve 50 is stopped (hereinafter referred to as fuel cut) during a period (automatic stop process) or in a state where the engine 10 is automatically stopped, and a predetermined value is set. When the restart condition is satisfied, the engine 10 is automatically restarted. The automatic stop condition may be, for example, that the vehicle speed is equal to or lower than a predetermined value, the accelerator operation amount detected by the accelerator sensor 42 is zero (or the brake operation amount detected by the brake sensor 44 is higher than the first predetermined amount). There are many things) etc. are included. Further, the engine restart condition includes, for example, that the accelerator operation amount detected by the accelerator sensor 42 is larger than the second predetermined amount, the brake operation amount detected by the brake sensor 44 is zero, and the like.

In the conventional idling stop control, as shown in FIG. 4, when the predetermined automatic stop condition is satisfied, the fuel cut is executed, and when the combustion of the fuel by the engine 10 is stopped, the rotary electric machine module 20 is operated. Power generation was performed and the braking torque of the rotary electric machine module 20 was applied to the engine 10 (see time t1). In this case, the magnitude of the braking torque of the rotary electric machine module 20 applied to the engine 10 depends on the magnitude of the induced current flowing through the stator 22. The magnitude of the induced current flowing in the stator 22 depends on the magnitude of the induced electromotive voltage generated in the stator 22, and the magnitude of the induced electromotive voltage generated in the stator 22 is the high rotational speed of the engine 10. Depends on.

Therefore, when the induced electromotive voltage generated in the stator 22 is smaller than the voltage of the battery 30, the induced current generated in the rotating electrical machine module 20 cannot flow in the battery 30, and the rotating electrical machine module 20 does not generate power. It cannot be implemented. Therefore, when the rotational speed of the engine 10 is lower than the threshold as the rotational speed at which the induced electromotive voltage generated at the stator 22 becomes smaller than the voltage of the battery 30, the rotating electrical machine module 20 is caused to perform the standby mode ( See time t2). As a result, after the rotational speed of the engine 10 becomes lower than the threshold value, the braking torque of the rotary electric machine module 20 cannot be applied to the engine 10 (see time t2-t3), and the engine 10 is completely operated. It may take a long time to stop.

As a countermeasure against this, as shown in FIG. 3, the rotating electrical machine module 20 is provided with a brake mode as a function for stopping the engine 10 more quickly. As shown in FIG. 5, the brake mode is performed when the predetermined automatic stop condition is satisfied, the fuel is cut, and the combustion of the fuel by the engine 10 is stopped (see time t10). ..

When the rotating electrical machine module 20 is caused to execute the brake mode, the MOSFETs 25a, 25c, 25e (upper arm MOSFETs) are controlled to be in the closed state, and the MOSFETs 25b, 25d, 25f (lower arm MOSFETs are controlled, as shown in FIG. ) Is controlled to an open state to short-circuit all the phases of the stator 22. As a result, a closed circuit in which the induced current generated in the stator 22 flows without passing through the battery 30 is formed in the drive circuit 25. By causing the rotating electrical machine module 20 to generate electric power in this state, the induced current generated in the stator 22 by the electric power generation flows in the closed circuit. Therefore, the magnitude of the braking torque of the rotary electric machine module 20 applied to the engine 10 when the rotary electric machine module 20 is set to the brake mode depends on the magnitude of the induced current flowing through the stator 22 in the closed circuit. Become. Therefore, the magnitude of the braking torque applied to the engine 10 when the rotating electrical machine module 20 is in the brake mode (see FIG. 5) is the same as when the rotating electrical machine module 20 is in the generator mode. It becomes larger than the magnitude of the braking torque applied to (see FIG. 4).

However, when the rotating electric machine module 20 is caused to perform the brake mode in a state where the rotation speed of the engine 10 is high, the induced current flowing from the stator 22 to the closed circuit becomes excessively large, and accordingly, the rotating electric machine to be applied to the engine 10 is increased. The braking torque of the module 20 may increase excessively. In this case, a so-called “belt squeal” may occur in which abnormal noise is generated from the belt forming the power transmission unit 16. As a countermeasure against this, during the period when the closed circuit is formed, the exciting current of the exciting current flowing through the field winding 23a provided in the rotor 23 of the adjusting unit 24 is prevented so that the braking torque applied to the engine 10 does not exceed a predetermined torque. Adjust the size. Accordingly, the magnitude of the braking torque applied to the engine 10 can be adjusted to be smaller than the predetermined torque, and the occurrence of problems such as "belt squeal" can be suppressed.

On the other hand, as shown in FIG. 5, the braking torque of the rotary electric machine module 20 can be applied to the engine 10 even when the rotation speed of the engine 10 is lower than the threshold value (see time t11-t14). ). At this time, the braking torque of the rotary electric machine module 20 can be applied to the engine 10 even when the engine 10 reversely rotates when swinging back when the engine 10 stops (see time t12-t13).

With the above configuration, the present embodiment has the following effects.

When the predetermined automatic stop condition is satisfied, the fuel cut is performed, and when the combustion of the fuel by the engine 10 is stopped, the rotating electrical machine module 20 is caused to perform the brake mode, so that the induction generated in the stator 22 is generated. A closed circuit is formed in which current flows without passing through the battery 30. As a result, even if the rotational speed of the engine 10 decreases and the magnitude of the induced electromotive voltage generated in the stator 22 becomes smaller than the voltage of the battery 30, the induced current generated in the rotary electric machine module 20 forms a closed circuit. Since it flows inside, the rotary electric machine module 20 can give a braking torque to the engine 10. That is, the braking torque can be applied to the engine 10 even in a region where the rotation speed of the engine 10 is lower, so that the engine 10 can be stopped quickly.

FIG. 7 shows the result when the rotary electric machine module 20 is put into the brake mode when the fuel cut is actually performed when the predetermined automatic stop condition is satisfied and the combustion of the fuel by the engine 10 is stopped. It is shown. FIG. 7 shows a variation mode of the rotation speed of the engine 10 when the rotating electric machine module 20 is made to perform the generator mode when the combustion of fuel by the engine 10 is stopped, and the rotating electric machine module 20 is made to perform the braking mode. And a change mode of the rotation speed of the engine 10 when the rotation speed is changed. According to FIG. 7, the degree of decrease in the rotation speed of the engine 10 is greater when the rotating electrical machine module 20 is in the brake mode than when the rotating electrical machine module 20 is in the generator mode. It can be seen that the braking torque applied to the engine 10 is larger when the rotating electrical machine module 20 is made to perform the brake mode. Further, it is understood that when the rotary electric machine module 20 is made to perform the brake mode, the swing-back that occurs when the engine 10 is stopped can be kept small and can be accommodated earlier. From this, it is suggested that when the rotating electrical machine module 20 is made to perform the brake mode, the braking torque is applied even when the engine 10 rotates in the reverse direction. Due to the above factors, the engine 10 can be stopped earlier when the rotating electrical machine module 20 is in the brake mode than when the rotating electrical machine module 20 is in the generator mode.

On the other hand, the restart timing of the engine 10 can be advanced with the rapid stop of the engine 10. Therefore, the restartability of the engine 10 can be improved.

When a braking force is applied to the engine 10, the conventional rotating electrical machine module detects the rotation angle of the rotor and energizes an appropriate phase of the armature winding of the stator according to the rotation angle of the rotor. There is a need to. Particularly when the engine 10 includes reverse rotation, the direction in which torque is applied must be reversed at the moment of reverse rotation, and complicated control is required. However, in the present embodiment, similar control can be achieved with simpler control. Is possible.

By operating the MOSFETs 25a to 25f to open and close so that all the phases of the stator 22 are short-circuited, a closed circuit in which the induced current generated in the stator 22 flows without passing through the battery 30 can be formed.

-By opening/closing the MOSFETs 25a to 25f so that all the phases of the rotary electric machine module 20 are short-circuited, the fluctuation of the braking torque applied to the engine 10 can be reduced.

The present invention is not limited to the contents described in the above embodiment, and may be modified within the scope of the gist of the present invention. For example, you may change as follows. By the way, the configuration of the following another example may be applied individually or in combination with the configuration of the above embodiment.

-In above-mentioned embodiment, the drive circuit 25 was equipped with MOSFET25a-25f. In this regard, an IGBT, a power transistor, a thyristor, a triac or the like may be used instead of the MOSFET.

-In above-mentioned embodiment, the generator motor 21 was a three-phase alternating current motor generator. In this regard, the motor generator is not limited to a three-phase AC motor generator, and may be a single-phase AC motor generator or a multi-phase AC motor generator.

-In above-mentioned embodiment, the rotor 23 was comprised including the field winding 23a. In this regard, the rotor 23 may include a permanent magnet for field instead of the field winding 23a. In this case, the generator motor 21 is an embedded magnet synchronous machine (IPMSM), a surface magnet synchronous machine (SPMSM), or the like.

In the above embodiment, idling stop control is performed when a predetermined automatic stop condition is satisfied while the vehicle is traveling, and when the combustion of fuel by the engine 10 is stopped, the rotary electric machine module 20 is caused to perform the brake mode. Was there. In this regard, it is not necessary to cause the rotary electric machine module 20 to perform the brake mode only when the idling stop control is performed, and the rotary electric machine module 20 is subjected to the brake mode when automatic stop control other than the idling stop control is performed. You may let me. Examples of the automatic stop control other than the idling stop control include automatic stop of the engine 10 when the accelerator operation amount becomes 0 regardless of the vehicle speed. Alternatively, the condition for causing the rotary electric machine module 20 to execute the brake mode does not have to be limited to the execution of the automatic stop control. For example, when the driver instructs the engine 10 to stop by performing a key-off operation, the rotary electric machine module 20 The brake mode may be executed.

In the above-described embodiment, a closed circuit in which the induced current generated in the stator 22 flows without passing through the battery 30 is formed in the drive circuit 25 by short-circuiting all the phases of the stator 22. In this regard, for example, by closing the MOSFETs 25c and 25e and opening the other MOSFETs 25a, 25b, 25d and 25f, the V phase and the W phase among the phases of the stator 22 are short-circuited. This may form a closed circuit in which the induced current generated in the stator 22 flows without passing through the battery 30.

In the above-described embodiment, all the upper arm MOSFETs 25a, 25c, 25e are controlled to be in the closed state, and the lower arm MOSFETs 25b, 25d, 25f are all controlled to be in the open state, thereby short-circuiting all the phases of the stator 22. I was letting it. In this regard, as shown in FIG. 8, by controlling all of the upper arm MOSFETs 25a, 25c and 25e to the open state and controlling all of the lower arm MOSFETs 25b, 25d and 25f to the closed state, the stator All the phases of 22 may be short-circuited.

In FIGS. 6 and 8, the rotary electric machine module 20 includes armature windings 22a, 22b, 22c (three-phase armature windings) and MOSFETs 25a that are three-phase bridge-connected to the armature windings 22a, 22b, 22c. 25f (switching element). Here, as shown in FIG. 6, in the first state, among the MOSFETs 25a to 25f, the upper arm MOSFETs 25a, 25c and 25e (three switching elements on the high voltage side) are closed and the lower arm MOSFETs 25b and 25d are closed. A closed circuit can be formed by opening 25f (three switching elements on the low voltage side). Further, as shown in FIG. 8, in the second state, a closed circuit is formed by opening the upper arm MOSFETs 25a, 25c, 25e of the MOSFETs 25a to 25f and closing the lower arm MOSFETs 25b, 25d, 25f. be able to. Then, when forming the closed circuit, the first state and the second state may be alternately switched. As a result, the heat load can be distributed to the MOSFETs 25a, 25c, 25e and the MOSFETs 25b, 25d, 25f.

In FIG. 11, the rotary electric machine module 20 includes the drive circuit 25A and the stator 22A (first system), and the drive circuit 25B and the stator 22B (second system), respectively. Phase armature winding) and three-phase bridge-connected MOSFETs 25a to 25f to the armature windings 22a, 22b, 22c. In this case, in the first system and the second system, among the MOSFETs 25a to 25f, the upper arm MOSFETs 25a, 25c, 25e (three switching elements on the high voltage side) are closed, and the lower arm MOSFETs 25b, 25d, 25f (low voltage). A closed circuit can be formed in each system by opening three switching elements on the voltage side. As a result, the braking torque can be applied to the engine 10 in each system, and the heat load per system (the heat load on each MOSFET 25a to 25f) can be reduced. Further, in the first system and the second system, the same action and effect can be obtained when the upper arm MOSFETs 25a, 25c, 25e of the MOSFETs 25a to 25f are opened and the lower arm MOSFETs 25b, 25d, 25f are closed. You can

As shown in FIG. 11, as the first state, in the first system and the second system, among the MOSFETs 25a to 25f, the upper arm MOSFETs 25a, 25c, 25e (three switching elements on the high voltage side) are closed, and the lower side is closed. By opening the MOSFETs 25b, 25d, 25f (three switching elements on the low voltage side) of the side arm, it is possible to form a closed circuit in each system. As shown in FIG. 12, as the second state, in the first system and the second system, among the MOSFETs 25a to 25f, the upper arm MOSFETs 25a, 25c and 25e are opened, and the lower arm MOSFETs 25b, 25d and 25f are opened. By closing, a closed circuit can be formed in each system. Then, when forming the closed circuit, the heat load is distributed to the MOSFETs 25a, 25c, 25e of each system and the MOSFETs 25b, 25d, 25f of each system by alternately switching between the first state and the second state. be able to.

As shown in FIG. 13, as the first state, in the first system (driving circuit 25A and stator 22A), among the MOSFETs 25a to 25f, the upper arm MOSFETs 25a, 25c, and 25e (three switching elements on the high voltage side). Is closed and the lower arm MOSFETs 25b, 25d, 25f (three switching elements on the low voltage side) are opened, a closed circuit can be formed on the high voltage side of the first system. At this time, the MOSFETs 25a to 25f are opened in the second system (driving circuit 25B and stator 22B). As shown in FIG. 14, as a second state, in the second system, by closing the upper arm MOSFETs 25a, 25c, 25e among the MOSFETs 25a to 25f and opening the lower arm MOSFETs 25b, 25d, 25f, A closed circuit can be formed on the high voltage side of the second system. At this time, the MOSFETs 25a to 25f are opened in the first system. Then, when the closed circuit is formed, by alternately switching the first state and the second state, a thermal load is applied to the MOSFETs 25a, 25c, 25e of the first system and the MOSFETs 25a, 25c, 25e of the second system. It can be dispersed.

As shown in FIG. 15, as the first state, in the first system (driving circuit 25A and stator 22A), among the MOSFETs 25a to 25f, the upper arm MOSFETs 25a, 25c, 25e (three switching elements on the high voltage side). Open and close the lower arm MOSFETs 25b, 25d, 25f (three switching elements on the low voltage side) to form a closed circuit on the low voltage side of the first system. At this time, the MOSFETs 25a to 25f are opened in the second system (driving circuit 25B and stator 22B). As shown in FIG. 16, as the second state, in the second system, by opening the upper arm MOSFETs 25a, 25c, 25e among the MOSFETs 25a to 25f and closing the lower arm MOSFETs 25b, 25d, 25f, A closed circuit can be formed on the low voltage side of the second system. At this time, the MOSFETs 25a to 25f are opened in the first system. Then, when the closed circuit is formed, by alternately switching between the first state and the second state, a thermal load is applied to the MOSFETs 25b, 25d, 25f of the first system and the MOSFETs 25b, 25d, 25f of the second system. It can be dispersed.

In each of the above examples, when switching between the first state and the second state, for example, the upper arm MOSFETs 25a, 25c, 25e (high voltage side switching elements) and the lower arm MOSFETs 25b, 25d, 25f (low voltage) If a dead time is provided to prevent a short circuit with the side switching element), a closed circuit is not formed. The dead time is a time in which both the MOSFETs 25a and 25b are opened so that the MOSFET 25a and the MOSFET 25b are not short-circuited. The braking torque cannot be applied to the engine 10 during the period when the closed circuit is not formed.

By the way, the rotation speed of the engine 10 periodically has a maximum value and a minimum value, as shown in FIGS. Then, for example, at time t11 in FIG. 5, at a time when the rotation speed of the engine 10 has a minimum value, the braking torque applied to the engine 10 by the generator motor 21 (rotary electric machine) becomes relatively small. In this respect, by switching between the first state and the second state at the time when the rotation speed of the engine 10 reaches the minimum value, it is possible to suppress the influence of being unable to give the braking torque to the engine 10 and to reduce the influence to the first state. You can switch between the two states. Further, at the time when the rotation speed of the engine 10 becomes zero, the braking torque applied to the engine 10 by the generator motor 21 becomes the smallest. Therefore, even when the first state and the second state are switched at the time when the rotation speed of the engine 10 becomes 0, the same operational effect can be obtained.

-When forming a closed circuit, you may switch each state (1st-4th state) shown in FIGS. 13-16 in a predetermined order. Although the predetermined order is arbitrary, if the order does not include switching between the state of FIG. 13 and the state of FIG. 15 and switching between the state of FIG. 14 and the state of FIG. 16, it is necessary to provide the dead time. Instead, the braking torque can be efficiently applied to the engine 10 by the generator motor 21. According to the above control, the MOSFETs 25a, 25c, 25e of the first system (driving circuit 25A and the stator 22A), the MOSFETs 25a, 25c, 25e of the second system (the driving circuit 25B and the stator 22B), and the first system The heat load can be distributed to the MOSFETs 25b, 25d, 25f and the second system MOSFETs 25b, 25d, 25f.

In the embodiment described above, the fuel cut is performed when the predetermined automatic stop condition is satisfied, and when the combustion of the fuel by the engine 10 is stopped, the rotary electric machine module 20 is set to the brake mode. In this regard, when the predetermined automatic stop condition is satisfied, the fuel is cut off and the combustion of the fuel by the engine 10 is stopped, and then the rotation speed of the engine 10 is higher than the predetermined rotation speed, If the module 20 is caused to perform the generator mode and the rotation speed of the engine 10 is lower than the predetermined rotation speed, the rotating electrical machine module 20 may be caused to perform the brake mode. The predetermined rotation speed is set to a rotation speed higher than the threshold value shown in FIGS.

When the rotary electric machine module 20 is charged without forming a closed circuit, the magnitude of the braking torque applied to the engine 10 depends on the magnitude of the induced current flowing through the stator 22. When the rotation speed of the engine 10 is higher than the predetermined rotation speed, it is considered that the braking torque applied to the engine 10 is sufficiently large even if the battery 30 is charged by the electric power supplied by the stator 22. Therefore, when the rotation speed of the engine 10 is higher than the predetermined rotation speed, the rotating electric machine module 20 is caused to execute the generator mode, so that braking torque can be applied to the engine 10 and the battery 30 can be charged. Becomes

On the other hand, when the rotation speed of the engine 10 is lower than the predetermined rotation speed, the induced electromotive voltage generated in the stator 22 due to power generation is also small, and a sufficient induced current cannot flow in the stator 22. It is conceivable that 20 cannot apply the braking torque to the engine 10. Alternatively, even if the rotary electric machine module 20 can apply the braking torque to the engine 10, the size thereof is considered to be very small. Therefore, when the rotation speed of the engine 10 is lower than the predetermined rotation speed, the rotary electric machine module 20 is caused to execute the brake mode. As a result, the induced current generated in the stator 22 does not decrease, and thus the braking torque applied to the engine 10 by the rotary electric machine module 20 can be suppressed from becoming smaller.

[1] In the above-described embodiment, the field winding 23a included in the rotor 23 is provided in the adjusting unit 24 so that the braking torque applied to the engine 10 does not become larger than the predetermined torque during the period in which the closed circuit is formed. The magnitude of the exciting current was adjusted. In this regard, during the period in which the closed circuit is formed, the MOSFET 25a, 25c, and 25e have MOSFETs 25a, 25c, and 25e each of which has a closing operation time period corresponding to the opening/closing operation cycle so that the braking torque does not exceed a predetermined torque. The ratio (duty ratio) is adjusted. Thereby, the magnitude of the induced current generated in the stator 22 can be limited, and by extension, the braking torque applied to the engine 10 can be suppressed from becoming larger than the predetermined torque. Further, by suppressing the flow of an excessively large induced current in the MOSFETs 25a, 25c, 25e, it is possible to suppress overheating of the MOSFETs 25a, 25c, 25e.

The control for preventing the braking torque applied to the engine 10 from becoming larger than the predetermined torque does not need to be independently performed in the above-described embodiment and another example described in [1], but is performed in combination. Good.

In the above embodiment, the stator 22 is configured to include the three-phase armature windings 22a to 22c, and the rotor 23 is configured to include the field winding 23a. In this regard, the stator 22 may include field windings, and the rotor 23 may include three-phase armature windings. In this case, the magnitude of the induced current flowing through the three-phase armature winding included in the rotor 23 is set so that the braking torque applied to the engine 10 does not exceed a predetermined torque during the period in which the closed circuit is formed. Limited. The specific method is similar to the method described in [1], and thus the description is omitted.

The control for preventing the braking torque applied to the engine 10 from exceeding the predetermined torque may be omitted. That is, the magnitude of the exciting current flowing through the field winding 23a and the duty ratio of the closing operation of the MOSFETs 25a, 25c, 25e may be adjusted so that the braking torque applied to the engine 10 is maximized.

[2] In the above embodiment, the rotary electric machine module 20 is assumed to be ISG. In this regard, it is not limited to ISG, and the alternator 60 that is a generator may be used. The configuration for the alternator 60 is shown in FIG. In this another example, the rectifier circuit 61 is a three-phase full-wave rectifier including a diode. Further, a second switching element 62 such as a MOSFET that opens and closes between the battery 30 and the rectifier circuit 61 is provided. Further, a connection path 63 that bypasses the battery 30 and connects the positive electrode side and the negative electrode side of the rectification circuit 61 is branched between the second switching element 62 and the rectification circuit 61, and the connection path 63 has A third switching element 64 that opens and closes the connection path 63 is provided. In the stop control system according to this another example, the switch control unit 65 controls opening/closing of the second switching element 62 and the third switching element 64 based on a command from the engine ECU 66.

In the stop control system according to this another example, by closing the third switching element 64, the induced current generated in the stator 67 included in the rotating electric machine 60 flows through the connection path 63 without passing through the battery 30. Can be formed. However, in this state, the current flowing from the battery 30 also flows into the connection path 63. In order to prevent this, when the closed circuit is formed by closing the third switching element 64, the second switching element 62 is opened. As a result, the inflow of current from the battery 30 to the connection path 63 can be blocked. With such a configuration, the same operation and effect as those of the above-described embodiment can be obtained.

In another example of [2], the rectifier circuit 61, the connection path 63, and the rotor 68 included in the rotating electric machine 60 are connected in parallel to the battery 30. In this circuit, when the third switching element 64 is closed to form a closed circuit and the second switching element 62 is opened, the voltage applied to the field winding 68a of the rotor 68 is reduced. The magnitude and the magnitude of the voltage applied to the connection path 63 are the same. At this time, since the connection path 63 is only provided with the third switching element 64, a sufficient voltage cannot be applied to the field winding 68a, and a sufficient current may not flow in the field winding 68a. Consequently, the rotor 68 may not be magnetized.

As a countermeasure against this, as shown in FIG. 10, in the connection path 63, the resistor 70 is provided on the negative electrode side of the third switching element 64. The resistor 70 may be provided on the connection path 63 on the positive electrode side of the third switching element 64. At this time, if the resistance value of the resistor 70 is large, the voltage applied to the resistor 70 becomes high (Ohm's law), so the voltage applied to the field winding 68a also becomes high, and the rotor 68 It becomes possible to magnetize. However, if the resistance value of the resistor 70 is too large, the induced current flowing from the stator 22 to the resistor 70 becomes small (Ohm's law), and the braking torque applied to the engine 10 may become small. Therefore, when the closed circuit is formed, the resistance value of the resistor 70 is adjusted so that the height of the voltage applied to the field winding 68a is lower than the voltage of the battery 30. This makes it possible to apply a larger braking torque to the engine 10 and magnetize the rotor 68 than when the rotary electric machine module 20 is set to the generator mode.

-In above-mentioned embodiment, the rotary electric machine module 20 assumed ISG. In this regard, the rotary electric machine module 20 is not limited to the ISG, but may be provided between the rotary shaft of the engine 10 and the transmission, and may be directly driven by the rotary shaft or may directly drive the rotary shaft. Further, as for the alternator 60 according to another example described in [2], the rectifier circuit 61 may be an alternator configured like the drive circuit 25.

10... Engine, 20... Rotating electric machine module, 21... Generator motor, 30... Battery, 60... Alternator.

Claims (24)

An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source ,
The rotating electric machine,
Field windings (23a, 68a),
A current adjusting unit (24) for adjusting the magnitude of the current flowing through the field winding,
Equipped with
The engine and the rotating electric machine are drivingly connected by a belt,
The current adjusting unit supplies the current flowing through the field winding so that the braking torque applied to the engine during the period when the closed circuit is formed does not become larger than a predetermined torque that causes abnormal noise from the belt. Stop control system to adjust the size of the . The rotating electric machine (21)
Armature windings (22a, 22b, 22c),
An induction current adjusting unit (26) for adjusting the magnitude of the average current of the induction current flowing through the armature winding,
Equipped with
The induced current adjusting unit is configured during a period in which a closed circuit is formed, the braking torque applied to the engine is the average current of the induced current flowing in the armature winding so as not to exceed the predetermined torque The stop control system according to claim 1, wherein the size is adjusted. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electric machine,
Armature windings (22a, 22b, 22c),
An induction current adjusting unit (26) for adjusting the magnitude of the average current of the induction current flowing through the armature winding,
Equipped with
The engine and the rotating electric machine are drivingly connected by a belt,
The induction current adjusting unit supplies the braking torque applied to the engine to the armature winding so that the braking torque applied to the engine does not become larger than a predetermined torque that causes an abnormal noise from the belt during a period in which the closed circuit is formed. A stop control system for adjusting the magnitude of the average current of induced currents. After the combustion of the fuel by the engine is stopped, when the rotational speed of the engine is higher than a predetermined rotational speed, the rotating electric machine performs power generation, and the rotational speed of the engine is lower than the predetermined rotational speed. The stop control system according to any one of claims 1 to 3, wherein the closed circuit is formed in the. Applicable to a vehicle having an automatic stop function for automatically stopping the engine when a predetermined automatic stop condition is satisfied,
The stop control system according to claim 1, wherein the closed circuit is formed after the automatic stop condition is satisfied and the combustion of the fuel by the engine is stopped. The rotary electric machine module is a polyphase rotary electric machine (20),
A plurality of first switching elements (25a to 25f) capable of opening and closing such that at least some of the plurality of phases of the polyphase rotating electric machine are short-circuited with each other;
The closed circuit is formed by opening and closing the first switching element so that at least some of the plurality of phases of the multi-phase rotating electric machine are short-circuited with each other. The stop control system according to item 1. The stop control system according to claim 6, wherein the duty ratio of the first switching element is adjusted so that the braking torque applied to the engine does not become larger than a predetermined torque during the period of forming the closed circuit. 8. The stop control system according to claim 6, wherein after the combustion of the fuel by the engine is stopped, the plurality of first switching elements are opened/closed so that all the phases of the multi-phase rotary electric machine are short-circuited. The rotating electrical machine module (60) is an alternator,
A rectifying unit (61) for rectifying the induced current generated by power generation,
A stop control system configured to cause the induced current rectified by the rectifying unit to flow to the power supply,
A second switching element (62) for opening and closing between the power source and the rectifying unit,
A connection path (63) between the second switching element and the rectification unit, which bypasses the power supply and connects the positive electrode side and the negative electrode side of the rectification unit;
Equipped with
The connection path includes a third switching element (64) that opens and closes the connection path,
The stop control according to claim 1, wherein the closed circuit is formed by closing the third switching element, and the second switching element is opened when the closed circuit is formed. system. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module (60) is an alternator,
A three-phase full-wave rectifier composed of six diodes, comprising a rectifying section (61) for rectifying the induced current generated by power generation,
A stop control system configured to cause the induced current rectified by the rectifying unit to flow to the power supply,
A second switching element (62) for opening and closing between the power source and the rectifying unit,
A connection path (63) between the second switching element and the rectification unit, which bypasses the power supply and connects the positive electrode side and the negative electrode side of the rectification unit;
Equipped with
The connection path includes a third switching element (64) that opens and closes the connection path,
A stop control system that forms the closed circuit by closing the third switching element and opens the second switching element when the closed circuit is formed. The rectifying unit, the connection path, and the field winding of the alternator are connected in parallel to the power supply,
11. Stop control system according to claim 10 , wherein the connection path comprises a resistor (70). The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system and the second system, three switching elements (25a, 25c, 25e) on the high voltage side among the six switching elements are closed and three switching elements on the low voltage side are closed. Open one switching element (25b, 25d, 25f), or open three switching elements on the high voltage side of the six switching elements and open three switching elements on the low voltage side in the first system and the second system. The stop control system according to claim 1, wherein the switching element is closed. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system and the second system, three switching elements (25a, 25c, 25e) on the high voltage side among the six switching elements are closed and three switching elements on the low voltage side are closed. Open one switching element (25b, 25d, 25f), or open three switching elements on the high voltage side of the six switching elements and open three switching elements on the low voltage side in the first system and the second system. Stop control system that closes switching elements. The rotating electrical machine module,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, three switching elements (25a, 25c, 25e) on the high voltage side of the six switching elements are closed and three switching elements (25b, 25d, 25f) on the low voltage side are closed. 6. The first state of opening and the second state of opening the three switching elements on the high voltage side and closing the three switching elements on the low voltage side are alternately switched. Stop control system. The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system and the second system, three switching elements (25a, 25c, 25e) on the high voltage side among the six switching elements are closed and three switching elements on the low voltage side are closed. In a first state in which two switching elements (25b, 25d, 25f) are opened, and in the first system and the second system, three switching elements on the high voltage side of the six switching elements are opened and the three switching elements on the low voltage side are opened. The stop control system according to any one of claims 1 to 5, which alternately switches between a second state in which three switching elements are closed. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system and the second system, three switching elements (25a, 25c, 25e) on the high voltage side among the six switching elements are closed and three switching elements on the low voltage side are closed. In a first state in which two switching elements (25b, 25d, 25f) are opened, and in the first system and the second system, three switching elements on the high voltage side of the six switching elements are opened and the three switching elements on the low voltage side are opened. A stop control system that alternately switches between a second state in which three switching elements are closed. The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system, among the six switching elements, three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b on the low voltage side are closed. , 25d, 25f) and opening the six switching elements in the second system, and opening the six switching elements in the first system and switching the six switching in the second system. The second state in which three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b, 25d, 25f) on the low voltage side are opened among the elements are alternately switched. The stop control system according to claim 1. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system, among the six switching elements, three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b on the low voltage side are closed. , 25d, 25f) and opening the six switching elements in the second system, and opening the six switching elements in the first system and switching the six switching in the second system. Among the elements, a stop control system that alternately switches between a second state in which three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b, 25d, 25f) on the low voltage side are opened. . The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system, among the six switching elements, three switching elements (25a, 25c, 25e) on the high voltage side are opened and three switching elements (25b on the low voltage side are opened. , 25d, 25f) and closing the six switching elements in the second system, and opening the six switching elements in the first system, and the six switching in the second system. The second state in which three switching elements (25a, 25c, 25e) on the high voltage side are opened and three switching elements (25b, 25d, 25f) on the low voltage side are closed among the elements are alternately switched. The stop control system according to claim 1. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system, among the six switching elements, three switching elements (25a, 25c, 25e) on the high voltage side are opened and three switching elements (25b on the low voltage side are opened. , 25d, 25f) and closing the six switching elements in the second system, and opening the six switching elements in the first system, and the six switching in the second system. Among the elements, a stop control system that alternately switches between a second state in which three switching elements (25a, 25c, 25e) on the high voltage side are opened and three switching elements (25b, 25d, 25f) on the low voltage side are closed. . 21. Any of claims 14 to 20 , wherein when the rotational speed of the engine periodically reaches a local maximum value and a local minimum value, the first state and the second state are switched at a time when the rotational speed reaches the local minimum value. The stop control system according to item 1. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, three switching elements (25a, 25c, 25e) on the high voltage side of the six switching elements are closed and three switching elements (25b, 25d, 25f) on the low voltage side are closed. Switching between a first state of opening and a second state of opening the three switching elements on the high voltage side and closing the three switching elements on the low voltage side,
A stop control system that switches between the first state and the second state when the rotation speed of the engine periodically reaches a maximum value and a minimum value when the rotation speed reaches the minimum value. The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system, among the six switching elements, three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b on the low voltage side are closed. , 25d, 25f) and opening the six switching elements in the second system, and opening the six switching elements in the first system and switching the six switching in the second system. Among the elements, a second state in which three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b, 25d, 25f) on the low voltage side are opened, and in the first system, Of the six switching elements, three switching elements on the high voltage side are opened, three switching elements on the low voltage side are closed, and the six switching elements are opened in the second system; and the first system And a fourth state in which the six switching elements are opened, and in the second system, three switching elements on the high voltage side of the six switching elements are opened and three switching elements on the low voltage side are closed, The stop control system according to claim 1, wherein the stop control system is switched in a predetermined order. An engine (10) that generates a driving force by combustion of fuel, a rotating electric machine module (20, 60) having a rotating electric machine (21, 69) capable of generating power by the driving force of the engine, and a rotating electric machine module A power supply (30) that is charged by the electric power supplied to the engine, the control system stopping the engine.
After the combustion of the fuel by the engine is stopped, an induction current generated in the rotating electric machine forms a closed circuit that flows without passing through the power source,
The rotating electrical machine module, in each of the first system and the second system,
Three-phase armature windings (22a, 22b, 22c),
Six switching elements (25a to 25f) three-phase bridge connected to the three-phase armature winding,
Equipped with
When forming the closed circuit, in the first system, among the six switching elements, three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b on the low voltage side are closed. , 25d, 25f) and opening the six switching elements in the second system, and opening the six switching elements in the first system and switching the six switching in the second system. Among the elements, a second state in which three switching elements (25a, 25c, 25e) on the high voltage side are closed and three switching elements (25b, 25d, 25f) on the low voltage side are opened, and in the first system, Of the six switching elements, three switching elements on the high voltage side are opened, three switching elements on the low voltage side are closed, and the six switching elements are opened in the second system; and the first system And a fourth state in which the six switching elements are opened, and in the second system, three switching elements on the high voltage side of the six switching elements are opened and three switching elements on the low voltage side are closed, A stop control system that switches in a predetermined order.

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