JP5590324B2 - Arrangement structure of operation control device for electric actuator - Google Patents

Description

  The present invention relates to an arrangement of an operation control device for an electric actuator mounted on a vehicle.

  In order to improve the exhaust gas and the combustion efficiency of the engine mounted on the vehicle, for example, in a reciprocating engine, a variable compression mechanism (Patent Document 1), a variable valve mechanism or the like (Patent Document 2) is used. There is. In order to drive these mechanisms, a motor torque that overcomes the friction of the valve system of the engine is required, so a large capacity electric actuator is used.

  The control device for operating the electric actuator is disposed in the engine room separately from the electric actuator, and a wiring for supplying power to the electric actuator and a control line for controlling the operation of the electric actuator are connected.

JP2003-104232A JP 2009-30777

However, there are devices in the engine room that may generate electromagnetic waves, such as a starter motor and an alternator that handle a large current.
Therefore, electromagnetic waves generated from the starter motor and the alternator may enter the electric actuator operation control device in the engine room as noise and affect the operation of the electric actuator.

Therefore, a method of covering the operation control device of the electric actuator with a shield that blocks electromagnetic waves is conceivable, but this leads to an increase in cost and weight.
In addition, when a large current is supplied from the operation control device of the electric actuator to the electric actuator, there is a possibility that electromagnetic waves may be generated from the operation control device of the electric actuator or its wiring, and other operation control devices in the engine room, For example, an ECU (engine control unit) that controls the operation of the engine may be affected.

The present invention has been made to solve such problems, and its purpose is as follows:
It is an object of the present invention to provide an arrangement structure of an operation control device for an electric actuator that can suppress an electromagnetic wave generated from a starter motor or an alternator from affecting the operation of the electric actuator without causing an increase in cost or weight.

In order to achieve the above object, according to the first aspect of the present invention, an operation control device for an electric actuator provided in an engine having a variable valve mechanism of a vehicle and changing a valve lift characteristic of the variable valve mechanism. The engine is connected to the vehicle by an elastic member of an engine mount located behind the front end of the engine, and the operation control device is separate from the electric actuator provided in the engine. front and of spring House for housing spring of the front wheel suspension system in the arranged behind the engine mount, the operation control device and the engine mount is located between the electric accessory of the engine, the operation controller It is located before SL engine between the engine control unit for controlling operation of the engine and Sea urchin, characterized in that it is arranged in an engine room of the vehicle.

Further, in the invention described in claim 2, in claim 1, the starter motor is disposed on one vehicle width direction side surfaces of the engine, the electric accessory is O alternator, prior Symbol alternator of the engine The other side in the vehicle width direction is disposed on the front side in the vehicle longitudinal direction, the engine mount is disposed on the other side in the vehicle width direction and on the rear side in the vehicle longitudinal direction from the alternator, and the electric actuator is It is arranged on the other side surface in the vehicle width direction, and the operation control device is arranged on the other side surface in the vehicle width direction and on the rear side in the vehicle longitudinal direction from the engine mount.

In the invention described in claim 3, in claim 2, before Symbol alternator, the placed on the vehicle height direction below the engine mount, the operation controller is arranged in the vehicle height direction above the engine mount It is characterized by being.

Also, in the invention described in claim 4, in any one of claims 1 to 3, wherein the operation control device and the electric actuator are connected by a wiring, the wiring is disposed over the engine mount It is characterized by being.

According to the present invention, even if electromagnetic waves are generated from the electric accessory to handle the current in the engine room is shielded by e emissions Gin mount, noise due to electromagnetic waves is hardly mixed into the operation control unit of the electric actuator. Namely, et emissions Gin mount such by utilizing a device in the engine room, it is possible to suppress the influence of the operation control device according to the electromagnetic waves generated from the electric accessory, without increasing the cost and weight, operating control It is possible to easily prevent malfunction of the device , and thus the electric actuator, and to suppress malfunction of the variable valve mechanism that affects the performance of the engine.
Also, even if electromagnetic waves are generated from the operation controller blocked by engine, mixing of the electromagnetic wave is prevented to the engine control unit. Therefore, the influence of the electromagnetic wave generated from the operation control device on the engine control unit can be suppressed.
In addition, since the operation control device is disposed in the vicinity of the spring house, which is a relatively high strength structure, the operation control device can be prevented from being mixed with electromagnetic waves, and the operation control device using a hard material can be used in a vehicle collision. Intrusion into the cabin can be prevented, and the safety of the passenger at the time of a collision in the engine room can be improved.

Further, according to the invention of claim 2, a relatively large current handling Usu Tatamota it is disposed on one vehicle width direction side surfaces of the engine. On the other hand, since the operation control device is disposed on the other side surface in the vehicle width direction of the engine, the engine is disposed between the starter motor and the operation control device, and even if electromagnetic waves are generated from the starter motor, It is blocked and the influence on the operation control of the electric actuator can be suppressed.

  Also, on the other side in the vehicle width direction of the engine, an alternator, which is an electrical accessory that handles a relatively large current like the starter motor, is disposed on the front side in the vehicle longitudinal direction, and the engine mount is located on the vehicle longitudinal direction rear side from the alternator. Placed on the side. Furthermore, since the operation control device is arranged behind the engine mount in the longitudinal direction of the vehicle, even if electromagnetic waves are generated from the alternator, they are blocked by the engine mount, and the influence on the operation control of the electric actuator can be suppressed.

According to the invention of claim 3, it is possible to prevent the noise due to the electromagnetic wave generated from the alternator from being mixed into the operation control device by the engine mount .

According to the invention of claim 4 , it is possible to prevent the noise due to the electromagnetic wave generated from the alternator from being mixed into the wiring connecting the actuator and the operation control device by the engine mount.

It is a top view which shows the structure in the engine room of the vehicle which concerns on one Embodiment of this invention. It is an enlarged top view which shows the structure of a motor controller (operation control apparatus) vicinity.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a top view showing a configuration in an engine room of a vehicle that employs an arrangement structure of an operation control device for an electric actuator according to an embodiment of the present invention. FIG. 2 is an enlarged top view showing a structure in the vicinity of the motor controller (operation control device).
As shown in FIG. 1, an engine room 2 is formed in the front part of a vehicle body 1 of a vehicle (automobile). The engine room 2 is a space provided in the body 4 of the vehicle for storing the engine 3 and the like, and is covered with a hood (not shown) so that the upper part can be opened and closed.

  The engine 3 mounted in the engine room 2 is supported by the chassis frame 5. Specifically, the chassis frame 5 includes a pair of side members 6a and 6b extending in the front-rear direction with a left-right spacing. The engine 3 is supported by the left and right side members 6a and 6b via an engine mount 7, respectively. The engine mount 7 has an elastic body such as rubber, and is configured, for example, by sandwiching a cylindrical rubber between two steel brackets formed in a cup shape.

A plurality of engine mounts 7 are provided on the left and right and the rear of the engine 3, and all of them are disposed 10 cm or more behind the front end of the engine 3.
The engine 3 is provided with an alternator 10 and a starter motor 11 as electrical accessories. The alternator 10 is a generator that converts the output (rotational driving force) of the engine 3 into electric power, and is disposed on the right front side of the engine 3. A starter motor 11 for starting the engine 3 is arranged on the left side of the engine 3. The alternator 10 and the starter motor 11 are devices that handle a particularly large current among the electrical auxiliary machines in the engine room 2.

  As shown in FIG. 2, the engine 3 includes a variable valve mechanism 20 that varies the lift amount of the intake valve. The variable valve mechanism 20 of the present embodiment includes an electric motor 21 in a valve mechanism that drives an intake valve via a rocker arm 20b with respect to a camshaft 20a that rotates as the crankshaft rotates. . The electric motor 21 varies the rolling position of a center rocker arm (not shown) with respect to the intake cam provided on the camshaft 20a via the worm shaft 20c and the worm wheel 20d, and the rocker arm 20b of the rocker arm 20b via the swing cam 20e. It has a function of changing the lift amount of the intake valve by changing the swing angle. The electric motor 21 is provided on the upper right side of the engine 3.

  The variable valve mechanism 20 is provided with a sensor (not shown) for sensing a variable state, and the electric motor 21 is controlled by a motor controller 22 so that the current sensor value becomes a target value. The motor controller 22 is an example of an operation control device according to the present invention, and inputs operating conditions of various engines 3 such as a load, a rotational speed, an accelerator opening, and the like, so that the lift amount of the intake valve corresponding to this is obtained. Then, electric power is supplied to the electric motor 21 to control the operation. For example, there is an electric motor 21 that incorporates a hall sensor and controls the motor sensor 22 by counting the number of ON / OFF times of the hall sensor signal. For this reason, if the sensor value or the target value becomes an incorrect value due to mixing of noise due to electromagnetic waves from other electrical equipment into the motor controller 22, the control of the variable valve mechanism 20 is in an incorrect state, so the engine body is set. The performance, fuel consumption, and drivability cannot be exhibited.

  The motor controller 22 has an aluminum die cast partly covered with a resin material so that the base is not damaged in the event of a collision. The motor controller 22 is disposed in the engine room 2 and in front of the spring house 25 on the right front wheel side, and is connected to the electric motor 21 disposed on the upper right side of the engine 3 via the wiring 26. The spring house 25 is a cylindrical steel member that houses the spring of the suspension device, and is formed integrally with the chassis frame 5 of the vehicle. By making the electric motor 21 and the motor controller 22 separate, the electric motor 21 can be used in common with other vehicle types to reduce the cost of components and to avoid direct vibration from the engine 3.

  In particular, in the present embodiment, the motor controller 22 is disposed in front of the spring house 25 on the right front wheel side, so that the engine mount 7 blocks the motor controller 22 and the alternator 10. A wiring 26 between the electric motor 21 and the motor controller 22 is disposed on the engine mount. Furthermore, the engine 3 is arranged so as to block between the motor controller 22 and the starter motor 11.

Furthermore, an ECU (Engine Control Unit) 30 that controls the operation of the engine 3 is:
It is arranged on the left side of the engine 3. That is, the engine 3 is arranged so as to block between the motor controller 22 and the ECU 30 arranged on the right side of the engine 3.
As described above, in this embodiment, the engine mount 7 is disposed so as to block between the motor controller 22 and the alternator 10. Furthermore, by arranging the wiring 26 between the electric motor 21 and the motor controller 22 above the engine mount 7, the engine mount 7 prevents electromagnetic waves generated from the alternator 10 from reaching the motor controller 22 and the wiring 26. Thereby, it is possible to prevent electromagnetic waves generated from the alternator 10 from being mixed as noise with respect to a signal emitted from the motor controller 22, and to prevent malfunction of the electric motor 21, that is, the variable valve mechanism 20.

  Further, by arranging the engine 3 so as to block between the motor controller 22 and the starter motor 11, electromagnetic waves generated from the starter motor 11 are prevented from reaching the motor controller 22 by the engine 3. It can suppress mixing with the signal emitted from the motor controller 22 by the generated electromagnetic wave as noise. In particular, since the engine 3 is the largest object in the engine room, the electromagnetic wave generated from the starter motor 11 is not only applied to the motor controller 22 but also to the wiring 26 connecting the motor controller 22 and the electric motor 21. The shielding and the invasion of electromagnetic waves into the wiring 26 can be suppressed.

  On the other hand, when electric power is supplied from the motor controller 22 to the electric motor 21 in order to operate the electric motor 21, electromagnetic waves may be generated from the motor controller 22 or from the wiring 26 connecting the motor controller 22 and the electric motor 21. is there. In the present embodiment, since the motor controller 22 and the wiring 26 are arranged on the right side of the engine 3, the engine 3 blocks from the ECU 30 arranged on the left side of the engine 3, and electromagnetic waves reach the ECU 30. It becomes difficult to do. Therefore, it is possible to prevent the signal emitted from the ECU 30 from being mixed as noise due to the electromagnetic wave generated from the operation circuit of the electric motor 21.

Further, since the motor controller 22 is disposed in the vicinity of the spring house 25 having a relatively high strength, the motor controller 22 using a hard material is prevented from entering the cabin at the time of a vehicle collision, It is possible to improve the safety of passengers in the event of a collision.
In addition, in order to prevent the motor controller 22 from entering the cabin, it is necessary to hold the motor controller 22 using a bracket that breaks due to the energy at the time of collision, or guide the motor controller 22 to go in a direction other than the cabin at the time of the collision. There is no need to provide it, and the wiring 26 connecting the motor controller 22 and the electric motor 21 can be prevented from being damaged by these brackets, and the occurrence of fire due to electric leakage can be prevented.

  Furthermore, as a result of mixing noise due to electromagnetic waves, the variable lift amount is affected, and the control of the variable valve mechanism 20 becomes erroneous, so that the engine body cannot exhibit the set performance, fuel consumption, and drivability. You can avoid that. In addition, said variable valve mechanism 20 is an example, Comprising: It is not limited to said structure. As long as it is driven by an electric actuator, the present invention can be applied to variable valve mechanisms having various configurations of intake valves or exhaust valves.

2 Engine room 3 Engine 7 Engine mount 10 Alternator 11 Starter motor 20 Variable valve mechanism 21 Electric motor 22 Motor controller 25 Spring house 26 Wiring 30 ECU

Claims (4)

An arrangement structure of an operation control device of an electric actuator provided in an engine having a variable valve mechanism of a vehicle and changing a valve lift characteristic of the variable valve mechanism,
The engine is connected to the vehicle by an elastic member of an engine mount located behind the front end of the engine,
The operation control device is disposed in front of a spring house that houses a spring of a front wheel suspension device separately from the electric actuator provided in the engine and behind the engine mount, and the operation control device and the engine located said engine mount between the electric accessory, so as to position front SL engine between the engine control unit for controlling operation of the said actuating control engine, placed in the engine room of the vehicle An arrangement structure of an operation control device for an electric actuator, wherein: A starter motor is disposed on one side surface of the engine in the vehicle width direction,
The electrical auxiliary machine is a Oh alternator,
The alternator is disposed on the other vehicle width direction side surface of the engine and on the vehicle front-rear direction front side,
The engine mount is disposed on the other side in the vehicle width direction and on the rear side in the vehicle longitudinal direction from the alternator,
The electric actuator is disposed on the other side surface in the vehicle width direction,
The arrangement structure of the operation control device for an electric actuator according to claim 1, wherein the operation control device is arranged on the other side surface in the vehicle width direction and on the rear side in the vehicle front-rear direction with respect to the engine mount. The alternator is disposed below the engine mount in the vehicle height direction,
The arrangement structure of the operation control device for the electric actuator according to claim 2, wherein the operation control device is arranged above the engine mount in a vehicle height direction. The electric actuator and the operation control device are connected by wiring,
The wiring arrangement of the operation control device of the electric actuator according to any one of claims 1 to 3, characterized in that arranged on top of the engine mount.

Images