JP2020083220A - Vehicle system - Google Patents

Abstract

To efficiently inspect before delivery of a vehicle on which a motor and an internal combustion engine are mounted.SOLUTION: A vehicle system comprises: an internal combustion engine 1 which is mounted on a vehicle and is utilized in application of the vehicle; a motoring motor 2 which is coupled to the internal combustion engine 1, is mounted on the vehicle and is utilized in application of the vehicle and which can rotate the internal combustion engine 1; and a control unit 0 which is mounted on the vehicle, controls the internal combustion engine 1 and the motoring motor 2 in application of the vehicle, and controls so as to rotate the internal combustion engine 1 by the motoring motor 2 before delivery of the vehicle for inspecting the assembled internal combustion engine 1.SELECTED DRAWING: Figure 2

Description

The present invention relates to improving the efficiency of inspection performed before shipment of a vehicle equipped with an electric motor and an internal combustion engine.

2. Description of the Related Art Recently, hybrid vehicles having two types of power sources, an electric motor and an internal combustion engine, have been widely used. A series-type hybrid vehicle (see, for example, Patent Document 1 below) drives a motor generator for power generation by an internal combustion engine to generate power, stores the generated power in a power storage device (battery and/or capacitor), and drives the vehicle. Supply to the motor generator. Then, the traveling motor generator rotates the axle of the vehicle and thus the drive wheels to travel.

Not only the motor generator for power generation but also the motor generator for traveling can generate power by regenerative braking and store the generated power in the power storage device. If the electric charge is already stored up to the full capacity of the power storage device, the electric power obtained by regenerative braking is intentionally supplied to the motor generator for power generation, and this is operated as an electric motor to rotationally drive the internal combustion engine to generate excess power. Consumes electricity.

In a hybrid vehicle, the vehicle can be driven by the rotational driving force output from the traveling motor generator even if the internal combustion engine does not burn the fuel to generate the rotational driving force. Therefore, the operation of the internal combustion engine may continue to be stopped even during operation of the vehicle.

When the amount of electric charge currently stored in the power storage device is below a predetermined amount, or when the output driving force required for the traveling motor generator is maximum, the internal combustion engine is started and fuel is supplied to the cylinders. This is combusted, and the motor generator for power generation is driven by the rotational driving force output from the internal combustion engine to generate power to charge the power storage device or increase the electric power supplied to the motor generator for traveling.

In a series-type hybrid vehicle, the motor generator for power generation also serves to motor (or crank) the internal combustion engine in preparation for starting the stopped internal combustion engine. At the time of motoring, necessary power is supplied from the power storage device.

By the way, when inspecting the assembled internal combustion engine, at an assembly plant or other test place, the internal combustion engine before being mounted on the vehicle is connected to a motoring test device having an electric motor, and the internal combustion engine is forcibly forced by the electric motor. It is customary to rotate and check whether there is any abnormality in the intake pressure, the operating state of the valve operating system, or the like (see, for example, Patent Document 2 below). As a matter of course, such a thing requires a dedicated motoring test device, and also works to connect the rotary shaft of the internal combustion engine and the rotary shaft of the electric motor of the motoring test device before starting the inspection, and the inspection. After the completion, it is necessary to work to separate the two again.

JP, 2016-064735, A International Publication No. 2005/057159

An object of the present invention is to improve the efficiency of inspection performed before shipment of a vehicle equipped with an electric motor and an internal combustion engine.

According to the present invention, an internal combustion engine mounted on a vehicle and operating during operation of the vehicle, and a motoring motor that is connected to the internal combustion engine and is mounted on the vehicle and operates during operation of the vehicle and capable of rotationally driving the internal combustion engine. And to control the internal combustion engine and the motoring electric motor mounted on the vehicle during operation of the vehicle, and to control the internal combustion engine by the motoring electric motor before shipment of the vehicle for the purpose of inspecting the assembled internal combustion engine. A vehicle system including a control device that controls to rotate and drive is configured.

ADVANTAGE OF THE INVENTION According to this invention, the efficiency of the inspection performed before the shipment of the vehicle carrying an electric motor and an internal combustion engine can be improved.

The figure which shows the outline|summary of the series type hybrid vehicle and control device in one Embodiment of this invention. The figure which shows the minimum structure at the time of inspection of the internal combustion engine before shipment of the hybrid vehicle of the same embodiment.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a main system of a hybrid vehicle in this embodiment. This hybrid vehicle includes an internal combustion engine 1, a power generation motor generator 2 that is driven by the internal combustion engine 1 to generate power, a power storage device 3 that stores the electric power generated by the power generation motor generator 2, and a power generation motor generator 2 and/ Alternatively, it is provided with a traveling motor generator 4 that receives electric power from the power storage device 3 to drive the axle of the vehicle and thus the drive wheels 62.

The hybrid vehicle of the present embodiment is a series hybrid electric vehicle that uses the internal combustion engine 1 only for power generation, and the driving wheels 62 of the vehicle are supplied with driving power for traveling exclusively from the traveling motor generator 4. Since the internal combustion engine 1 and the drive wheel 62 are mechanically separated from each other, the rotational drive force is not transmitted between them originally. That is, the internal combustion engine 1 can rotate completely independently of the traveling motor generator 4 and the drive wheels 62. Therefore, even when the vehicle in which the ignition switch (power switch or ignition key) is operated to be turned on is operated, in other words, the vehicle is in a state where the driver can step on the accelerator pedal, the power storage device 3 In a situation in which a sufficient electric charge is stored in the engine, the operation of the internal combustion engine 1 accompanied by the combustion of fuel may not be performed.

The internal combustion engine 1 is, for example, a 4-stroke engine including a plurality of cylinders. The crankshaft, which is the rotating shaft of the internal combustion engine 1, is mechanically connected to the rotating shaft of the motor generator 2 for power generation via a gear mechanism. Then, by inputting the rotational driving force output from the internal combustion engine 1 to the power-generating motor generator 2, the power-generating motor generator 2 generates power. The generated electric power charges the power storage device 3 and/or supplies it to the traveling motor generator 4. Further, the motor generator 2 for power generation also functions as an electric motor that itself generates rotational driving force to rotationally drive the crankshaft of the internal combustion engine 1. For example, the power generation motor generator 2 executes motoring (cranking) as a preparation for starting the stopped internal combustion engine 1.

The traveling motor generator 4 generates a driving force for traveling the vehicle, and inputs the driving force to the driving wheels 62 via the speed reducer 61. Further, the traveling motor generator 4 is rotated by being rotated by the drive wheels 62 to generate electric power and recover the kinetic energy of the vehicle as electric energy. The electric power generated by this regenerative braking charges the power storage device 3.

However, if the electric charge is already stored up to the full capacity of the power storage device 3 and it is difficult to charge more than that, the electric power regenerated by the traveling motor generator 4 is intentionally supplied to the electric power generating motor generator 2 to generate electric power. The internal combustion engine 1 is rotationally driven by operating the motor generator 2 for electric motor as an electric motor. As a result, the surplus electric power is exhausted while maintaining the braking performance of the vehicle. Further, at this time, since the rotation of the internal combustion engine 1 is maintained, it is possible to execute the fuel cut in which the fuel supply to the cylinder of the internal combustion engine 1 is temporarily stopped.

Power storage device 3 is typically a lithium-ion battery, a nickel-hydrogen battery, or the like, and supplies necessary electric power to each of traveling motor generator 4 that is a traveling electric motor and power generation motor generator 2 that is a motoring electric motor. ..

The generator inverter 21 converts the AC power generated by the motor generator 2 for power generation into DC power. Then, the DC power is input to power storage device 3 or drive machine inverter 41. In addition, the generator/inverter 21 converts the DC power supplied from the power storage device 3 and/or the drive/motor inverter 41 into AC power when the power-generating motor/generator 2 is operated as an electric motor, and then generates the motor/generator 2 for power generation. To enter.

The drive machine inverter 41 converts the DC power supplied from the power storage device 3 and/or the generator inverter 21 into AC power, and then inputs the AC power to the traveling motor generator 4. In addition, the drive machine inverter 41 converts the AC power generated by the traveling motor generator 4 when performing regenerative braking of the vehicle into DC power, and then inputs the DC power to the power storage device 3 or the generator inverter 21.

The generator inverter 21 and the drive inverter 41 form part of a PCU (Power Control Unit).

An ECU (Electronic Control Unit) 0, which is a control device, controls the internal combustion engine 1, the power generation motor generator 2, the traveling motor generator 4, the PCU, and the power storage device 3 during operation in which the driver drives the vehicle. The ECU 0 is a microcomputer system having a processor, a memory, an input interface, an output interface and the like. The ECU 0 is a plurality of ECUs, that is, an engine controller that controls the internal combustion engine 1, a generator controller that controls the power generator motor generator 2 and the generator inverter 21, a battery controller that controls the power storage device 3, a traveling motor generator 4, and A drive controller for controlling the drive inverter 41 may be communicably connected to each other via an electric communication line such as a CAN (Controller Area Network). A program for controlling each of the internal combustion engine 1, the power generation motor generator 2, the traveling motor generator 4, the PCU, and the power storage device 3 is installed in the memory of the ECU 0 when the vehicle is operated.

The ECU 0 detects the amount of depression of the accelerator pedal by the driver, the shift position, that is, the position of the shift lever or the selector lever, or the ON/OFF state of the switch, which is being sensed via the sensor, the current vehicle speed, the road surface gradient, the electricity storage The rotational driving force for traveling output by the traveling motor generator 4, the regenerative power generated by the traveling motor generator 4, the internal combustion engine 1 outputs according to the amount of electricity stored in the device 3, the generated power of the generating motor generator 2, and the like. The rotational drive force for the motor, the electric power generated by the motor generator 2 for power generation, and the magnitude of the rotational drive force for motoring output by the motor generator 2 for power generation are increased/decreased.

If the power storage device 3 is currently storing sufficient electric charge and the output driving force required for the traveling motor generator 4 is not the maximum, the fuel supply to the internal combustion engine 1 is cut off and the internal combustion engine 1 is not operated. On the contrary, when the amount of electric charge currently stored in the power storage device 3 is below a predetermined amount, or when the output driving force required for the traveling motor generator 4 is the maximum, the internal combustion engine 1 is started. Fuel is supplied to the cylinders and burned, and the power generation motor generator 2 is driven by the rotational driving force output from the internal combustion engine 1 to generate power to charge the power storage device 3 or to the traveling motor generator 4. Increase the power supplied. In particular, if the amount of electric power that can be supplied to the traveling motor generator 4 by the power storage device 3 alone is limited, when the driver strongly depresses the accelerator pedal to request quick acceleration of the vehicle, the generator motor generator 2 is generated. Unless the generated electric power is also supplied to the traveling motor generator 4, the driving force necessary and sufficient to achieve the required acceleration cannot be generated and input to the drive wheels 62.

Let's start the internal combustion engine 1 while the vehicle is traveling by driving the drive wheels 62 by the traveling motor generator 4 without supplying the fuel to the cylinders of the internal combustion engine 1 and operating the internal combustion engine 1. At this time, the motor generator 2 for power generation performs motoring for starting the internal combustion engine 1. Motoring for starting the internal combustion engine 1 continues until the internal combustion engine 1 burns fuel and can rotate independently. More specifically, the rotational speed of the crankshaft of the internal combustion engine 1 that is being sensed is increased to a minimum value or more required for starting, and the crankshaft of the internal combustion engine 1 has been rotated a predetermined number of times or more from the start of motoring. The motoring is terminated when the motor rotates by an angle or more. After the start of the internal combustion engine 1 is completed and the motoring of the internal combustion engine 1 is completed, the power supply to the motor generator 2 for power generation is reduced to zero.

The condition that the crankshaft has rotated a predetermined number of times or more or a predetermined angle or more may be replaced with the fact that the cylinder determination for knowing the current stroke of each cylinder of the internal combustion engine 1 or the position of the piston is completed. As a matter of course, in order to inject the fuel at an appropriate timing according to the stroke of each cylinder and to ignite and burn the fuel at an appropriate timing, the ECU 0 needs to know the current stroke of each cylinder. Cylinder discrimination is performed using a crank angle sensor that outputs a pulse signal each time the crankshaft of the internal combustion engine 1 rotates a predetermined angle and a cam angle sensor that outputs a pulse signal each time the intake camshaft or the exhaust camshaft rotates a predetermined angle. .. Since the method of cylinder discrimination is well known, its explanation is omitted here.

Therefore, in the present embodiment, the motor generator 2 for power generation, which is motorized for the purpose of starting the internal combustion engine 1 during the operation of the vehicle, is also used for the purpose of motoring for the purpose of inspecting the internal combustion engine 1 before the shipment of the vehicle. To do.

The assembled internal combustion engine 1 is inspected, for example, as shown in FIG. 2, by connecting at least the internal combustion engine 1 and the power generation motor generator 2 and connecting the PCU or the inverter 21 to the power generation motor generator 2 and And ECU0 are connected. As described above, the internal combustion engine 1, the motor generator 2 for power generation, the PCU or the inverter 21, and the ECU 0 are mounted and operated in the vehicle as components of the hybrid vehicle of the present embodiment. It is also possible to carry out an inspection of the internal combustion engine 1 after mounting these components on the vehicle.

At least when the internal combustion engine 1 is inspected, an inspection program for controlling the internal combustion engine 1, the motor generator 2 for power generation, and the PCU or the inverter 21 is installed in the memory of the ECU 0. According to the program, the ECU 0 operates the motor generator 2 for power generation as an electric motor to rotationally drive the internal combustion engine 1. With respect to the pressure of the intake air (or the flow rate of the intake air) flowing through the intake passage of the internal combustion engine 1, the pressure of the exhaust gas flowing through the exhaust passage, the rotation speeds of the crankshaft and the camshaft, and the rotation angle (posture) of the crankshaft. Check the camshaft rotation angle (posture) and the intake/exhaust valve operation including the variable valve mechanism for abnormalities.

Intake pressure sensor that detects intake pressure (or air flow meter that detects intake flow rate), exhaust pressure sensor that detects exhaust pressure, crank angle sensor that detects crankshaft rotation speed and rotation angle, camshaft rotation speed And some or all of the sensors used for the inspection of the internal combustion engine 1, such as the cam angle sensor for detecting the rotation angle and the operating phase angle of the variable valve mechanism, are installed in advance in the internal combustion engine 1 mounted on the vehicle, and It is connected to the ECU 0 and is used to control the internal combustion engine 1 during operation of the vehicle. The sensor that is not used for controlling the internal combustion engine 1 during operation of the vehicle may be removed after the inspection of the internal combustion engine 1 is completed. Further, the inspection program may be erased from the memory of the ECU 0 after the inspection of the internal combustion engine 1 is completed.

The power supply 7 that supplies electric power to the power-generating motor generator 2 that performs motoring during inspection of the internal combustion engine 1 may be one installed in an assembly plant or other test location, or may be a power storage device mounted on a vehicle. 3 may be used.

In the present embodiment, an internal combustion engine 1 mounted on a vehicle and operating during operation of the vehicle, and an internal combustion engine 1 connected to the internal combustion engine 1 mounted on the vehicle and operating during operation of the vehicle can be rotationally driven. For the purpose of controlling the motoring electric motor 2 and the internal combustion engine 1 and the motoring electric motor 2 mounted on the vehicle during operation of the vehicle and inspecting the assembled internal combustion engine 1 before shipment of the vehicle. A vehicle system including a control device 0 for controlling the internal combustion engine 1 to be rotationally driven by the motoring electric motor 2 is configured.

According to the present embodiment, it becomes possible to inspect the assembled internal combustion engine 1 before the shipment of the vehicle without preparing a special motoring test device. Moreover, it is possible to reduce the number of steps for connecting the internal combustion engine 1 and the motoring test device before the inspection and disconnecting them after the inspection. Since the motoring motor 2 used for the inspection is mounted on the vehicle and operated, it should originally be connected to the internal combustion engine 1 and does not need to be detached from the internal combustion engine 1. In general, it is possible to improve the efficiency of the inspection performed before the shipment of the vehicle equipped with the electric motor 2 and the internal combustion engine 1.

The present invention is not limited to the embodiment described in detail above. For example, the vehicle to which the present invention is applied is not limited to a series hybrid vehicle.

In addition, the specific configuration of each unit and the contents of processing can be variously modified without departing from the spirit of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be applied to a pre-shipment inspection of a vehicle equipped with an electric motor and an internal combustion engine.

0... Control unit (ECU)
1... Internal combustion engine 2... Motoring motor (motor generator for power generation)
4... Running electric motor (running motor generator)
3... Power storage device 62... Drive wheel 7... Power supply for inspection

Claims (1)

An internal combustion engine mounted on a vehicle and operating when the vehicle is in operation;
A motoring electric motor that is connected to the internal combustion engine and is mounted on the vehicle and operates during operation of the vehicle, capable of rotationally driving the internal combustion engine,
The internal combustion engine is mounted on the vehicle and is controlled during operation of the vehicle, and the internal combustion engine is rotationally driven by the motoring electric motor before shipment of the vehicle for the purpose of inspecting the assembled internal combustion engine. A system for a vehicle, which comprises:

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