JP3876798B2 - Power converter for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular power conversion device that supplies electric power to an electric device mounted on a vehicle, and more particularly to an arrangement of the vehicular power conversion device in a vehicle.
[0002]
[Prior art]
As a driving source for traveling, a hybrid vehicle including an engine and an electric motor that uses a battery as a power source is known. As one of such hybrid vehicles, from the viewpoint of global warming prevention and resource saving, when the vehicle stops at an intersection with a red light, the engine is automatically stopped and the driver tries to start running again. (E.g., depressing the accelerator pedal or stopping the brake pedal, or switching the shift lever to the travel position), the economy running system that restarts the engine (idling stop system, engine automatic stop and start system) It has been developed mainly for large vehicles such as buses, and has been put into practical use.
[0003]
In this system, in order to supply power to auxiliary equipment (air conditioners, headlamps, audio, etc.) while the vehicle is stopped, 36V lead is used in addition to a secondary battery such as a normal 12V lead storage battery. A secondary battery such as a storage battery or a lithium battery is installed. While the vehicle is stopped, electric power is supplied from the 36V secondary battery to these auxiliary machines.
[0004]
In addition, the motor generator is rotated using the power of the 36V secondary battery to restart the engine. Further, the 36V battery and the 12V battery are charged using the motor generator during operation of the engine.
[0005]
For this reason, in such a vehicle, two power supplies (36V battery and 12V battery) having different voltages and a PCU (Power Control Unit) including an inverter and a converter are mounted. The PCU is connected to these two power sources by a power cable, and is also connected to a motor generator installed on the side of the engine.
[0006]
Further, the PCU is cooled with cooling water in order to suppress a temperature rise caused by an internal electric circuit. The cooling water of the PCU is heat-exchanged with the outside air by an electric water pump and a radiator that are separate from the engine cooling water. The electric water pump circulates the cooling water between the radiator and the PCU which are different from the engine cooling water provided on the side of the engine cooling water radiator.
[0007]
As described above, the PCU is connected to the plurality of power cables and the cooling water input pipe and the output pipe.
[0008]
Conventionally, for example, when a hybrid vehicle is manufactured using a vehicle that is not a hybrid vehicle as a base vehicle, a 12V battery is placed in the rear trunk room, and this PCU is placed on the tray of the 12V battery on which the 12V battery is placed. It was. That is, the PCU is disposed behind the engine room (the cabin side). On the other hand, the motor generator and the radiator are arranged in front of the engine room. In addition, the motor generator is disposed on the exhaust manifold side of the vertically mounted engine.
[0009]
[Problems to be solved by the invention]
However, in the arrangement as described above, the length of the power cable from the PCU to the motor generator and the length of the cooling water pipe from the PCU to the radiator are long, which causes an increase in cost. In addition, since the power cable is long, the electric resistance value is increased and energy loss is caused. Further, since the power cable has a large wire diameter, its handling is troublesome. Furthermore, since the cooling water pipe is long, water injection of the cooling water is not preferable.
[0010]
The present invention has been made to solve the above-described problems, and provides a vehicular power conversion device that can suppress interference with other components as much as possible while reducing costs.
[0011]
[Means for Solving the Problems]
The vehicular power conversion device according to the first invention is mounted on a vehicle in which an engine and an electric motor are arranged in an engine room. The electric motor is disposed on the vehicle front side in the engine room. The vehicular power conversion device includes an electric circuit that supplies electric power to the electric motor, and fixing means for fixing the vehicular power conversion device to a position on the vehicle front side in the engine room.
[0012]
According to the first invention, an electric circuit such as an inverter supplies three-phase power to the electric motor. The fixing means fixes the vehicle power converter at a position on the vehicle front side in the engine room. Since the electric motor is disposed on the front side of the vehicle in the engine room, the wiring length from the electric circuit to the electric motor can be increased by fixing the vehicular power conversion device to a position on the front side of the vehicle in the engine room by a fixing means. Can be shortened. In such a vehicle, since a current of several hundreds of A flows at maximum, it is difficult to handle a large wire diameter from the electric circuit to the electric motor. Since the length of the wiring is shortened, handling is facilitated, and interference with other parts can be suppressed as much as possible. Furthermore, since the length of the wiring is shortened, the electric resistance value is reduced and the energy loss is reduced. Furthermore, since the length of the wiring is shortened, the cost can be reduced.
[0013]
In the vehicle power converter according to the second aspect of the invention, in addition to the configuration of the first aspect, the fixing means is a position on the front side of the vehicle in the engine room, and is closer to the front side of the vehicle than the position of the engine. Means for securing in position.
[0014]
According to the second invention, the vehicular power converter is fixed at a position on the front side of the vehicle with respect to the position of the engine. Since it is ahead of the engine, the wiring from the electric circuit to the motor can be more easily routed without interfering with the engine.
[0015]
According to a third aspect of the present invention, there is provided the vehicular power conversion device, in addition to the first or second aspect of the invention, the engine is a vertical engine, and the electric motor and the power converter are opposite to each other with respect to the engine crankshaft. The intake system pipe line and the exhaust system pipe line of the engine are arranged at positions opposite to each other with respect to the crankshaft. The fixing means includes means for fixing to a position on the front side of the vehicle in the engine room and on the intake system pipeline side.
[0016]
According to the third aspect of the present invention, this vehicular power conversion device is fixed at a position on the front side of the vehicle in the engine room and on the intake system pipeline side. The temperature in the vicinity of the intake side pipe is lower than that in the vicinity of the exhaust side pipe. Therefore, the ambient temperature of the vehicular power converter can be lowered, and damage to the electric circuit due to a temperature rise of the inverter or the like can be prevented.
[0017]
The vehicular power converter according to the fourth invention further includes a cooling means for cooling the electric circuit using the coolant in addition to the configuration of any one of the first to third inventions. A heat exchange means connected to the cooling means for exchanging heat between the coolant and the outside air is arranged on the vehicle front side in the engine room.
[0018]
According to the fourth invention, the cooling means cools the electric circuit using the coolant. The heat exchange means is connected to the cooling means, and performs heat exchange between the coolant and the outside air to lower the temperature of the coolant. The coolant circulates between the cooling means and the heat exchange means.
[0019]
In the vehicle power converter according to the fifth aspect of the invention, in addition to the configuration of any one of the first to fourth aspects of the invention, the electric circuit includes a power extraction portion arranged toward the front of the vehicle.
[0020]
According to the fifth aspect of the invention, since the power take-out section faces the front of the vehicle, the wiring from the vehicle power conversion device to the electric motor can be easily pulled out.
[0021]
In the vehicle power converter according to the sixth invention, in addition to the configuration of the fifth invention, the power take-out section is inclined toward the motor by a predetermined angle with respect to the front of the vehicle. Features.
[0022]
According to the sixth aspect of the invention, since the power take-out section is inclined toward the electric motor, the wiring from the vehicular power conversion device to the electric motor can be drawn out more easily.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated. In the following, an example in which the piping with an inlet according to the embodiment of the present invention is applied to a vehicle equipped with an economy running system will be described, but the present invention is applied only to such a vehicle. It is not a thing.
[0024]
FIG. 1 illustrates a system configuration of a vehicle on which a PCU according to the present embodiment is mounted. This vehicle includes an engine 1002, a torque converter 1004, an automatic transmission 1006, a PCU 100, an engine ECU 1196, a 12V power supply 812 connected to the PCU 100, and a 36V power supply 836. The vehicle also includes a motor generator 1026 connected to engine 1002 via damper pulley 1010, and auxiliary equipment 1120 connected to engine 1002 via damper pulley 1010.
[0025]
PCU 100 includes an inverter 1102, a DC / DC converter 1104, and a hybrid ECU 1106. Hybrid ECU 1106 realizes an economy running system that controls operation and stop of engine 1002 in accordance with the driving state of the vehicle.
[0026]
In such a configuration, the output of the engine 1002 is output to the output shaft 1008 via the torque converter 1004 and the automatic transmission 1006. Finally, the output of engine 1002 is transmitted to drive wheels (not shown). In addition to this, the output of the engine 1002 is transmitted to the belt 1014 via the electromagnetic clutch built-in damper pulley 1010 connected to the crankshaft 1002a. The pulley 1016 and the pulley 1018 are rotated by the output transmitted by the belt 1014. It should be noted that the electromagnetic clutch built in the damper pulley 1010 is connected / disconnected as necessary so that output transmission / non-transmission can be switched between the damper pulley 1010 and the crankshaft 1002a.
[0027]
The pulley 1016 is connected to the rotating shaft of the auxiliary machine 1020 so that the auxiliary machine 1020 can be driven by the rotational force transmitted from the belt 1014. Examples of the auxiliary machines 1020 include an air conditioner compressor, a power steering pump, and an engine cooling water pump.
[0028]
A pulley 1018 is connected to a rotating shaft of a motor generator 1026 as a rotating electrical machine. The motor generator 1026 functions as a generator as necessary, thereby converting the rotational force from the engine 1002 or the drive wheels transmitted via the pulley 1018 into electric energy. Further, the motor generator 1026 functions as an electric motor as necessary, thereby rotating one or both of the crankshaft 1002a and the auxiliary machinery 1020 via the pulley 1018 and the belt 1014. Motor generator 1026 is a three-phase AC rotating electric machine.
[0029]
The PCU 1000 includes an inverter 1102, a DC / DC converter 1104, and a hybrid ECU 1106. Inverter 1102 and motor generator 1026 are connected by power lines 1131a, 1131b, and 1131c, and inverter 1102 and high-voltage DC power supply 836 (rated voltage 36V) as a second power supply are connected by power line 1130b. The DC / DC converter 1104, the inverter 1102, and the high voltage DC power source 836 are connected by a power line 1130c, and the DC / DC converter 1104 and the low voltage DC power source 812 (rated voltage 12V) as the first power source are connected. Are connected by a power line 1130d. Note that the covering of the power lines 1131a, 1131b, 1131c, 1130b, and 1130c is colored in bright colors, and the power line 1130d is colored in black.
[0030]
When the motor generator functions as a generator, the inverter 1102 controlled by the hybrid ECU 1106 adjusts the charging pressure and power generation amount by switching, so that the motor generator 1026 charges the high voltage DC power supply 836 with electric energy. Do. Further, electric energy is also charged to the low voltage DC power supply 1150 via the DC / DC converter 1104.
[0031]
When power is not generated by the motor generator 1026, the high voltage DC power supply 836 and the low voltage DC power supply 812 are connected to supply power from the high voltage DC power supply 836 to the low voltage DC power supply 812 side. Is done.
[0032]
When motor generator 1026 functions as a motor, inverter 1102 controlled by hybrid ECU 1106 supplies power from high-voltage DC power supply 836 to motor generator 1026.
[0033]
In addition to the control of the inverter 1102 described above, the hybrid ECU 1106 automatically stops the engine 1002 when a predetermined engine automatic stop condition is satisfied, and when the predetermined engine automatic start condition is satisfied, the engine 1002 The engine is automatically stopped and started to automatically start the engine. During this automatic engine start, the hybrid ECU 1106 connects the electromagnetic clutch built in the damper pulley 1010 and controls the inverter 1102 to supply power from the high voltage DC power source 836 to the motor generator 1026 as described above. Generator 1026 is driven and engine 1002 is cranked. In addition, the hybrid ECU 1106 shuts off the electromagnetic clutch built in the damper pulley 1010 during automatic engine stop, and controls the inverter 1102 to supply power from the high voltage DC power source 836 to the motor generator 1026 as described above. Then, the motor generator 1026 is driven and the auxiliary machinery 1026 is driven.
[0034]
With reference to FIG. 2, the on-vehicle arrangement of the components of the vehicle on which the PCU according to the present embodiment is mounted will be described. As shown in FIG. 2, PCU 100 is disposed on the vehicle front side of the vehicle side in engine room 1040. The unit case 1110 of the PCU 100 is formed to have a size that can be placed on a battery tray (not shown) on which the 12V DC power supply is installed in an existing vehicle having only a 12V DC power supply, for example. The PCU 100 is placed on such a tray and is fixed to the tray by a fixing jig with the tray provided on the PCU 100. The tray is provided at a predetermined position in the engine room so as to be inclined by a predetermined angle. The PCU 100 and the tray are, for example, a bolt hole (female screw) provided at the bottom of the PCU 100, a through hole provided in the tray corresponding to the position of the bolt hole, and a bolt (through the through hole). The PCU 100 and the tray are fixed by a restraining band. The high voltage DC power supply 836 and the low voltage DC power supply 812 are mounted at the rear of the vehicle.
[0035]
The structure of the PCU according to the present embodiment will be described with reference to FIGS. FIG. 3 shows a longitudinal section of PCU 100 according to the present embodiment. FIG. 4 shows a front view of the PCU with the cover 1126 removed. FIG. 5 shows a front view of PCU 100 with cover 1126 attached. FIG. 6 shows a perspective view of the cover 1126. FIG. 7 shows an AA longitudinal sectional view in FIG.
[0036]
The unit case 1110 includes an upper case 1110a and a case main body 1110b formed of a conductive material such as metal, and the upper case 1110a is detachably fixed to the case main body 1110b vertically upward. The upper case 1110a and the case body 1110b can be electrically connected to each other by a metal bus bar 1118 having one end connected to the outside of the upper case 1110a and the other end connected to the outside of the case body 1110b. A ground terminal 1112 is integrally formed on the upper surface of the upper case 1110a.
[0037]
In the unit case 1110, a DC / DC converter 1104 is built vertically below the inverter 1102. The negative terminal of the inverter 1102 is connected to the upper case 1110a via a contact 1114a, and the negative terminal of the DC / DC converter 1104 is connected to the case body 1110b via a contact 1114b. Therefore, as described above, the upper case 1110a in which the ground terminal 1112 is formed and the case main body 1110b are connected to be energized, so that the inverter 1102 and the DC / DC converter 1104 are connected via the unit case 1110. The common ground terminal 1112 is connected. The common ground terminal 1112 is grounded to the vehicle body side by a connection line (not shown).
[0038]
Bus bars 1160a, 1160b, 1160c (U phase, V phase, W phase) formed in a substantially L shape have one end connected to the inverter 1102 and the other end adjusted to the upper surface of the upper case 1110a. 1120 is inserted and protrudes from the upper surface of the upper case 1110a, and its tip is extended so as to be directed to the side of the unit case (front of the vehicle), and the terminal portions 1162a, 1162b, 1162c (U phase, V phase, W phase) ). Terminals 1162a, 1162b, and 1162c are connected to power lines 1131a, 1131b, and 1131c from the U-phase, V-phase, and W-phase of a stator coil (not shown) of motor generator 1026, and inverter 1102 and motor generator are connected. 1026 is connected.
[0039]
The opening 1120 has an opening area larger than the sum of the areas vertically above the terminal portions 1162a, 1162b, and 1162c, and is adjusted so that the terminal portions 1162a, 1162b, and 1162c can be inserted when the upper case 1110a is attached and detached.
[0040]
Between the terminal portions 1162a, 1162b, 1162c and the upper case 1110a, the unit case 1110 can be slid in and out to the side, and the opening portion 1120 is covered while supporting the terminal portions 1162a, 1162b, 1162c. A terminal block 1122 is installed.
[0041]
A cover 1126 covering the outside of the terminal portions 1162a, 1162b, and 1162c is attached vertically above the terminal portions 1162a, 1162b, and 1162c. As shown in FIGS. 6 and 7, the cover 1126 is formed with a protrusion 1127 and a recess 1128 that meshes with a convex portion formed on the upper case 1110a in order to prevent the assembly direction from being erroneously assembled. The
[0042]
On the upper surface of the upper case 1110a, the positive terminal 1152 of the low-voltage DC power supply 812 is covered with a cover 154 and attached. On the upper surface of the cover 1154, “+ 12V” is written so as to clearly notify the operator that the rated voltage is 12V.
[0043]
Between the inverter 1102 and the DC / DC converter 1104, a cooling water channel 1180 is provided as a cooling means. Cooling water is injected into the cooling water channel 1180 from the pipe 1180a and discharged from the pipe 1180b to the outside.
[0044]
The PCU 100 includes connectors 1170a, 1170b, 1170c, and 1170d for connecting to a current sensor 1190, a temperature sensor 1192, a chassis ECU 1194, an engine ECU 1196, and the like as in-vehicle devices. The connectors 1170a to 1170c are housed in an integrated case 1172 because the operating voltages of the current sensor, temperature sensor, chassis ECU, and the like to which they are connected are equal to 12V. The integrated case 1172 is detachably attached to the upper surface of the upper case 1110a, and a harness 1174 that connects the inside of the PCU 100 and the integrated case 1172 is inserted into the PCU 100 from the side wall of the case body 1110b.
[0045]
Connector 1170e is for connecting a field circuit in PCU 100 and a field circuit wound around the rotor of motor generator 1026, and the covering of power line 1133 is colored in a bright color.
[0046]
According to the PCU 100 according to the present embodiment, the following effects can be obtained by such a configuration.
[0047]
Since the inverter 1102 and the DC / DC converter 1104 are connected to a common ground terminal 1112 via a unit case 1110 formed of a conductive member, each of the inverter 1102 and the DC / DC converter 1104 is connected to the vehicle body. This eliminates the need to connect the ground wire. As a result, the number of parts can be reduced and the arrangement structure can be simplified, the manufacturing cost can be reduced, and the workability can be improved.
[0048]
The inverter 1102 and the DC / DC converter 1004 generate heat during operation and need to be cooled. By providing a cooling water channel 1180 between the inverter 1102 and the DC / DC converter 1100, the inverter 1102 and the DC / DC converter 1004 are cooled. Since both the converter 1004 and the converter 1004 can be cooled, the cooling structure can be simplified.
[0049]
Since the ground terminal 1112 is formed on the vertical upper surface of the unit case 1110, workability can be improved.
[0050]
Since the terminal portions 1162a to 1162c are disposed on the vertical upper surface of the unit case 110, workability at the time of connecting the terminal portions 1162a to 1162c and the power lines 1131a to 1131b is improved.
[0051]
Since the terminal portions 1162a to 1162c protrude from the vertical upper surface of the unit case 1110, the connection work with the power lines 1131a to 1131b is improved. Furthermore, since the terminal portions 1162a to 1162c are extended toward the side of the unit case 1110, the power lines 1131a to 1131b may be caught vertically upward when the terminal portions 1162a to 1162c and the power lines 1131a to 1131b are connected. In addition, the periphery of the terminal portions 1162a to 1162c can be made compact, and workability at the time of connection work is improved.
[0052]
The unit case 1110 is composed of an upper case 1110a and a case main body 1110b. The upper case 1110a is detachable from the case main body 1110b vertically upward, so that the upper case 1110a is directed vertically upward from the case main body 1110b. By removing, maintenance and the like can be easily performed, and service workability is improved. Further, when the upper case 1110a is attached or detached, the terminal block 1122 that supports the terminal portions 1162a to 1162c is taken out by sliding the terminal block 1162a to 1162c and the vertical upper surface of the upper case 1110a to the side of the unit case 1110a. The opening 1120 covered with the terminal block 1122 is opened, and the upper case 1110a can be attached and detached without the terminals 1162a to 1162c interfering with each other. Further, when attaching the upper case 1110a, the terminal block 1120 is simply slid from the side of the unit case 1110 between the terminal portions 1162a to 1162c and the vertical upper surface of the upper case 1110a and inserted. In addition, after the upper case 1110a is attached, a configuration that achieves both support of the terminal portions 1162a to 1162c and prevention of intrusion of foreign matter, water, and the like from the opening portion 1120 is obtained.
[0053]
By housing connectors 1170a to 1170c for connection with in-vehicle devices connected to the PCU 100 in the integrated case 1172, the PCU 100 can be made compact and workability can be improved. Furthermore, since the integrated case 172 can be attached to and detached from the unit case 1110, workability such as when the upper case 1110a is attached and detached is improved. Furthermore, since the connectors for connection with on-vehicle devices having the same operating voltage are integrated, the workability is further improved.
[0054]
Since the cover 1126 is formed with the protrusion 1127 and the recess 1128 that meshes with the convex portion formed on the upper case 1110a, it is possible to avoid attaching the cover 1126 in the wrong direction.
[0055]
Since the positive terminal of the low voltage DC power supply 812 (rated voltage 12V) is attached to the unit case 1110, for example, the engine is started by receiving power from another vehicle equipped with a 12V DC battery (so-called jumper start), etc. Even in this case, it is possible to prevent the worker from being confused.
[0056]
By making the colors different between the covering of the connection line in the rated voltage 12V system and the covering of the connection line in the rated voltage 36V system, it is easy to identify both voltage systems and the workability is improved. In addition, since the rated voltage of 36V is not harmful to the human body, it is dangerous. Therefore, the connection lines 1131a to 1131c, 1130b, 1130c, and 1133 are not harmful to the human body, but are dangerous to the human body. Can be clearly suggested.
[0057]
In the above description, an example is shown in which the upper case 1110a and the case body 1110b can be energized by the bus bar 1118, but the PCU 100 according to the present embodiment is not limited to this. You may form the metal touch part in which metals are directly connected in the connection part of upper case 1110a and case main body 1110b. In this case, if the metal touch part is formed in a part of the connection part and the other part is configured as a seal part, the sealability in the connection part is ensured and the upper part is used without using another part such as a bus bar. It is possible to energize the case 1110a and the case main body 1110b.
[0058]
With reference to FIG. 8, the arrangement of PCU 100 having such a structural feature in engine room 1040 will be described.
[0059]
As shown in FIG. 8, PCU 100 is disposed obliquely in front of the vehicle in engine room 1040. In the engine room 1040, a radiator 200 and a radiator fan 210 are arranged. Radiator fan 210 is connected to the crankshaft of engine 1002. Motor generator 1026 is connected to damper pulley 1010 via pulley 1018 and belt 1014. The damper pulley 1010 is connected to the crankshaft of the engine 1002 as described above.
[0060]
Air is supplied to the engine 1002 from the intake manifold 500 on the intake side and the exhaust manifold 520 on the exhaust side, and the exhaust is discharged outside the engine 1002. The temperature near the intake manifold 500 is low because the air supplied to the intake manifold 500 is outside air, and the temperature near the exhaust manifold 520 is high because the combustion gas discharged from the exhaust manifold 520 is high. As shown in FIG. 8, the PCU 100 that generates heat from the built-in inverter 1102 and DC / DC converter 1104 is installed not on the exhaust manifold 520 side but on the intake manifold 500 side where the ambient temperature is low.
[0061]
The PCU 100 is connected to the radiator 200 by a rubber hose. An electric water pump is disposed between the PCU 100 and the radiator 200. PCU 100 and motor generator 1026 are connected by a three-phase output cable.
[0062]
As shown in FIG. 9, the three-phase output cable is arranged in the direction of the motor generator 1026 straight from the terminal portion of the PCU 100 arranged at an inclination, and is connected to the motor generator 1026 in a large arc. The three-phase output cable 110 is composed of three 15 sq cables in order to pass a maximum current of 400 A. Therefore, the curvature cannot be reduced. For this reason, as shown in FIG. 9, the motor generator 1026 is moved by a predetermined angle so that the PCU 100 is linearly connected from the PCU 100 to the motor generator 1026 (actually, it can be arranged with a large curvature). Tilt to the side.
[0063]
Furthermore, by tilting the PCU 100 toward the motor generator 1026 side, interference with the radiator 200 can be avoided. Furthermore, the space on the fender side is widened, and the workability when connecting another hose to the cooling water pipe of the PCU 100 is also improved.
[0064]
With reference to FIG. 10, the space of a fender part is demonstrated. FIG. 10 is an enlarged view of the vicinity of the PCU 100 of FIG. As shown in FIG. 10, PCU 100 is installed inclined at a predetermined angle in the direction of motor generator 1020. This is because the three-phase output cable 110 is pulled out from the PCU 100 without bending as described above. Thus, by inclining PCU 100 toward motor generator 1026 by a predetermined angle, the space in the vicinity of cooling water pipe 120 shown in FIG. 10 is expanded.
[0065]
With reference to FIGS. 11 and 12, the operation of the three-phase output cable 110 and the operation of the cooling water pipe 120 will be described. As shown in FIGS. 11 and 12, three-phase output cable 110 is connected from PCU 100 to motor generator 1026 with a large curvature. Further, cooling water pipes are connected from the PCU 100 to the electric water pump 130, from the electric water pump 130 to the radiator 200, and from the radiator 200 to the PCU 100.
[0066]
This cooling water pipe is formed of a rubber hose having a large diameter because the pipe length is shorter than that of the conventional arrangement position and the number of interferences is reduced. Thus, the cooling water pipe 120 can be configured as a rubber hose instead of a metal, so that the cost can be reduced and the operating noise of the electric water pump 130 is less transmitted.
[0067]
Moreover, since the length of the cooling water pipe 120 became short, the water injection by the amount of cooling water decreasing improved.
[0068]
Furthermore, as shown in FIG. 12, since PCU100 was arrange | positioned above the electric water pump 130, the connection port of PCU100 and the electric water pump 130 could be made downward, and water injection improved.
[0069]
As described above, according to the PCU according to the present embodiment, the PCU is tilted on the front side of the engine room and on the opposite side of the exhaust manifold. As a result, the length of the three-phase output cable from the PCU to the motor generator can be shortened and can be arranged with a large curvature. Further, the length of the cooling water pipes of the PCU, the electric water pump and the radiator can be shortened, and the amount of cooling water can be reduced. As a result, it is possible to provide a PCU that can suppress interference with other components as much as possible while reducing costs.
[0070]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of a vehicle on which a PCU according to the present embodiment is mounted.
FIG. 2 is an on-vehicle layout diagram of components of a vehicle on which the PCU according to the present embodiment is mounted.
FIG. 3 is a longitudinal sectional view of a PCU according to the present embodiment.
FIG. 4 is a front view of the PCU with a cover removed.
FIG. 5 is a front view of the PCU with a cover attached.
FIG. 6 is a perspective view of a cover.
7 is a cross-sectional view taken along the line AA in FIG.
FIG. 8 is a device layout diagram (part 1) in an engine room.
FIG. 9 is a device layout diagram (part 2) in the engine room.
FIG. 10 is a device layout diagram (part 3) in the engine room;
FIG. 11 is a perspective view (No. 1) showing an arrangement of devices in the engine room.
FIG. 12 is a perspective view (No. 2) showing a device arrangement in the engine room.
[Explanation of symbols]
100 PCU, 200 radiator, 210 radiator fan, 500 intake manifold, 520 exhaust manifold, 812 low voltage power supply (rated voltage 12V), 836 high voltage power supply (rated voltage 36V), 1002 engine, 1004 torque converter, 1006 automatic transmission, 1008 Output shaft, 1010 Damper pulley with built-in electromagnetic clutch, 1014 belt, 1016, 1018 pulley, 1020 Auxiliaries, 1026 Motor generator, 1040 Engine room, 1042 Guest room, 1102 Inverter, 1104 DC / DC converter, 1110 Unit case, 1110a Upper case (First case member), 1110b lower case (second case member), 1112 ground terminal, 1118 bus bar, 1120 opening, 1122 Sub unit, 1126 cover, 1130b, 1130c Connection line in the first power supply system, 1130d Connection line in the second power supply system, 1131a to 1131c Power line, 1162a to 1162c Terminal portion, 1170a to 1170e Connector, 1172 Integrated case, 1180 Cooling channel .

Claims (5)

An electric power converter for a vehicle mounted on a vehicle in which an engine and an electric motor are arranged in an engine room, wherein the electric motor is arranged on the vehicle front side in the engine room, and the electric power converter for a vehicle is
An electric circuit for supplying electric power to the electric motor;
Fixing the power conversion device for a vehicle, a position of the vehicle front side in the engine room, a position of the intake system pipe roadside engine, and the position of the vehicle front side than the position of the engine And a vehicle power conversion device. The engine is a vertical engine, and the electric motor and the power converter are disposed at positions opposite to each other with respect to the crankshaft of the engine and at a position on the front side of the vehicle. The system pipe line and the exhaust system pipe line are arranged at positions opposite to each other with respect to the crankshaft,
The vehicular power converter according to claim 1, wherein the fixing means includes means for fixing at a position on the front side of the vehicle in the engine room and on the intake system pipe side. The vehicular power conversion device further includes a cooling means for cooling the electric circuit using a coolant.
Wherein the vehicle front side of the engine compartment, connected to said cooling means, said heat exchange means for the cooling liquid to the ambient air and heat exchange is arranged, vehicle power converter according to claim 1 or 2 apparatus. Said electrical circuit includes a power extraction unit that is disposed forward of the vehicle, the vehicle power converter according to claim 1 or 2. The power conversion device for a vehicle according to claim 4 , wherein the power extraction unit is inclined toward the electric motor by a predetermined angle with respect to the front of the vehicle.

Images