JPH02158416A - Mount device for power unit - Google Patents

Abstract

PURPOSE:To abate a cab noise so effectively by controlling an exciter which gives a vibration so as to selectively offset a component of degree being caused of an offensive noise especially out of each vibrational component different in the degree to engine speed. CONSTITUTION:In a device which supports an engine on a car body 7 via a mount member, gives a vibration to this mount member 6 by an exciter 8, and keeps off any transfer of engine vibration to the car body, there are provided with first to fourth degree separators 121 - 124, separating only a specified degree component from output signals of cylinder internal pressure sensors 31 - 34 additionally installed in respective cylinders 21 - 24 and outputting it. Also, there are provided with first to fourth counting multipliers 131 - 134 weighting each degree partial output at the specified rate. In addition, there are provided with converters 161 - 164 which convert the weighted output into vibration output with a specified transfer characteristic, and the exciter 8 is driven and controlled by output inverted as far as 180 degrees of phase of the output by a phase inverter 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mounting device for a power unit in a vehicle.

(Prior art) In a vehicle equipped with a power unit consisting of an engine and a transmission, vibrations occur due to the combustion stimulation force caused by the explosion in the combustion chamber of the engine, and the inertia force caused by the reciprocating movement of the piston. However, this is transmitted to the vehicle body via the mount portion that supports the power unit on the vehicle body, causing noise inside the vehicle.

Conventionally, to deal with the noise inside the car due to engine vibration, the vibration in the mount is detected, and a vibrator is used to apply vibrations in the opposite phase to the mount.
There is an idea that engine vibrations are offset by the mount and prevented from being transmitted to the vehicle body.

Furthermore, according to Japanese Patent Application Laid-Open No. 61-6442, in the above-mentioned device equipped with a vibrator on the mount, the vibrator is controlled by a controller at a preset phase according to the engine speed, etc. A system is shown in which transmission of engine vibrations to the vehicle body is suppressed by driving with a gain and a gain.

(Problem to be Solved by the Invention) However, in the case of detecting the vibration of the mount described above and applying vibration of the opposite phase to the mount using a vibrator, it is difficult to control the operation of the vibrator. Due to the delayed response, vibrations from the engine and vibrations from the vibrator interfere with each other at the mount, resulting in so-called howling, which has the disadvantage that vibrations are not effectively suppressed.

In addition, in the case of a device that applies vibration to the mount part with a preset phase and gain according to the engine rotation speed etc. described in the above publication, this vibration and engine vibration do not necessarily correspond accurately. Therefore, there may be cases where engine vibration cannot be reliably offset.

Therefore, in the past, the reality is that the noise inside the car caused by engine vibration has not been reduced to a satisfactory level, and in particular, the noise caused by the interaction of vibration components with orders close to each other with respect to the engine speed is harsh. Unpleasant noise has become a problem.

The present invention deals with the problem of in-vehicle noise caused by engine vibration as described above. The object of the present invention is to improve the sound quality of in-vehicle noise by selectively canceling out order components that cause particularly unpleasant noise. ) aims to effectively suppress the transmission of engine vibrations to the vehicle body and reduce noise levels.

(Means for Solving the Problems) In order to solve the above problems, the first and second inventions of the present application both include a vibrator that applies vibrations to the mount portion of the power unit so as to offset engine vibrations. The first invention relates to a mount device, and the first invention includes combustion stimulation force detection means for detecting the combustion stimulation force of each cylinder in an engine, and inputs signal outputs (for example, pressure signal output) from these detection means. , separates the input into an order corresponding to the number of explosions per engine revolution or an order that is an integral multiple thereof, and orders separated by 0.5 orders between these orders, and outputs each order separately. an output means, an order-based weighting means for weighting the output of each order outputted from these output means, and a vibration output at the mount part using a predetermined transfer characteristic of the output weighted by the order by the weighting means. The present invention is characterized in that it is comprised of a converting means for converting the output of the converting means, a phase inverting means for inverting the phase of the output of the converting means, and a driving means for driving the vibrator with the output of the phase inverting means.

Here, the order corresponding to the number of explosions per engine revolution or the order that is an integral multiple thereof means, for example, in the case of a 4-stroke, 4-cylinder engine, the number of explosions per engine revolution is 2.
Since it is 2 times, 2 times, 4 times, 6 times with respect to engine speed
In the case of a 4-cycle 6-cylinder engine, the order is 3rd, 6th, 9th, etc. Also,
In the former case, the orders divided by 0.5 orders are 0.5 order, 1 order, 1.5 order, or 2.5 order,
The order is 3rd, 3rd, 5th, etc., and in the latter case, 0.5
Next, 1st, 1.5th, 2nd, 2.5th, or 3.5th,
The order is 4th order, 4.5th order, 5th order, 5.5th order, etc.

Further, the second invention includes detection means for detecting the combustion stimulation force of each cylinder or the bearing force at each main bearing of the crankshaft, and each signal output from these detection means for each cylinder or each main bearing. a plurality of conversion means each converting into vibration in the mount part using predetermined transmission characteristics;
The present invention is characterized by comprising a phase inverting means for inverting the phase of the vibration output obtained by adding the outputs from these converting means, and a driving means for driving the vibrator with the output of the phase inverting means.

(Function) According to the above configuration, in the case of the first invention, the signal output from the combustion stimulation force detection means for each cylinder is separated into components of every 0.5 order with respect to the engine rotation speed by the order-specific output means. At the same time, the output for each separated order component is weighted at a predetermined ratio by the order-specific weighting means. The vibration output weighted in this way and converted into vibration of the mount part by the conversion means is sent to the vibrator via the phase inverter and the drive means, and is applied to the mount part by the vibrator. It turns out.

In that case, for example, in the case of a 4-cycle, 4-cylinder engine, the weighting means may be used to increase the
(2,5...) next, 1(3...) next, 1.5 (
3, 5...), the vibrations of the above-mentioned order components of the engine vibration can be selectively canceled out by the vibrations applied to the mount by the vibrator. Become. As a result, the vibrations transmitted to the car body are
In the case of the above example, the vibration mainly consists of order components corresponding to the number of explosions per engine rotation, such as second order, fourth order, etc., or order components that are integral multiples of the number of explosions per engine rotation, and the noise inside the car caused by this vibration is The sound becomes a so-called pure tone, and the sound quality of the noise is improved.

Further, according to the second invention, the combustion stimulation force of each cylinder or the bearing force of each main bearing that is actually generated is detected by the detection means, and these forces are transmitted to the mount part by the conversion means. The vibration output is converted into a vibration output at the mount part using the transmission characteristics when the vibration is applied, and the vibration having the opposite phase of the added value is applied to the mount part by the vibrator via the driving means. Therefore, there is no howling that occurs when vibrations in the mount are detected and vibrations in the opposite phase are applied to the mount, and vibrations in the opposite phase that accurately correspond to the actual engine vibration are applied to the mount. As a result, the transmission of the engine vibration to the vehicle body and the noise inside the vehicle are effectively reduced.

(Example) Examples of the present invention will be described below.

First, a first embodiment of the first invention will be described with reference to FIG. 1. An engine 1 according to this embodiment is a 4-stroke, 4-cylinder engine, and a sensor for detecting combustion stimulation force is installed in each cylinder 21 to 24. Internal pressure sensors 3□ to 34 are installed, and the engine 1 is supported by the vehicle body 7 via a mount member 6 interposed between the engine side bracket 4 and the vehicle body side bracket 5. A vibrator 8 that applies vibration to the mount member 6 and a control bag M1o that controls the vibrator 8 based on outputs from the sensors 3□ to 34 are provided.

This control device 10 includes four preamplifiers 111 to 114 that amplify the pressure signal outputs (combustion stimulation forces) A□ to A4 from the respective sensors 31 to 34, respectively, and outputs from these preamplifiers 11□ to 114. First to fourth order separators 12, to 124 which input Bl to B4 as pressure signal inputs and separate and output only specific order components of each pressure signal human power Bl to B4, and these order separators 12 ,~
124 outputs C1 to C4 respectively have coefficients a and b.

By multiplying c and d, each order output 01 to C4
first to fourth coefficient multipliers 13 that weight the
1 to 134 and the outputs D of these multipliers 131 to 134
1 to D4 are respectively input via the phase inverter 14 as necessary, and these inputs D□ to D4 are selectively recombined to produce an output E1 corresponding to the combustion stimulation force of each cylinder 21 to 24, respectively. ~First to fourth adders 15 that output E4
1 to 154 and the outputs El to E4 of these adders 151 to 154 are converted into the form of vibration in the mount part 6 using each vibration transmission coefficient from the cylinder to the mount member 6. -The fourth converters 161 to 164, the adder 17 that adds the outputs G1 to G4 of these converters 16+ to 164, and the phase of the output (■) of this adder 17 to 180
A phase inverter 18 for inverting the phase, and further this inverter 18
and a power amplifier 19 that amplifies the output J of and outputs it to the vibrator 8.

Here, the configuration of the order separators 12□ to 124 will be explained with reference to FIG. 2.
As shown in , the pressure signal output A from each cylinder 2, to 24
1 to A4 (specifically, the outputs B1 to B4 of the preamplifiers 111 to 114, the same applies hereinafter).
The second separator 122 is configured with pressure signal output A from the first and fourth cylinders, as shown in FIG.
A4 directly, pressure signal outputs A 2 and A 3 from the second and third cylinders 22 and 23 to phase inverters 12□b, 12□
The third separator 123 receives the pressure signal output from the first cylinder 21 as shown in (3) in the same figure. It is composed of an adder 123a which inputs A1 directly and a pressure signal output A4 from the fourth cylinder 24 via a phase inverter 123b, and adds these.
The separator 124 is connected to the second cylinder 2, as shown in FIG.
The adder 124a inputs the pressure signal output A2 from the third cylinder 23 directly and the pressure signal output A3 from the third cylinder 23 via a phase inverter 124b, and adds them. As will be described in detail later, the first adder 15□ receives the sensor outputs A1 to A from each of the cylinders 21 to 24.
4. In other words, the even order (2nd, 4th, 6th... order) components FA of the combustion stimulation forces f1 to f4 generated in each cylinder 21 to 24
The second separator 122 separates the odd-order (1°3.5... order) component FB of each combustion stimulation force f, ~f4 into the third separator 123.
and the fourth separator 124 has the first half order (0, 5, 25,
4th, 5th... order) component Fc and the second half order (1°5.3
．． 5, 5.5...Next) component FD respectively as the above output C
Output as 1 to C4.

Further, as shown in FIG. 1, the coefficient multipliers 13, .
Among the first to fourth adders 151 to 54 to which the weighted order side outputs D1 to D4 from No. 4 are input, the first adder 15□ includes first to third coefficient multipliers 13□ to The outputs D1 to D3 from 133 are input as they are, and the second adder 15
2, the outputs D1 and D4 from the first and fourth coefficient multipliers 13□ and 134 are input as they are, and the output D2 from the second coefficient multiplier 132 is inputted via the phase inverter 14, respectively.
The third adder 153 receives the output D1 from the first coefficient multiplier 131 as is, and the second and fourth coefficient multipliers 132, 1 .
34 output D2. D4 is inputted via phase inverters 14 and 14, respectively, and further to the fourth adder 154,
Outputs from the first and second coefficient multipliers 13□, 132,
D2 remains unchanged, and output D3 from the third coefficient multiplier 133
are respectively inputted via the phase inverter 14. These adders 151-154 add the respective inputs and recombine them into outputs E1-E4 corresponding to each cylinder 21-24.

Next, the operation of this embodiment will be explained based on the theory underlying the configuration of this control circuit 10.

First, the combustion stimulation forces f1 to f4, which are input to the control circuit 10 as pressure signal outputs A1 to A4 from the sensors 31 to 34 of each cylinder 2I to 24, are generated once for every two rotations of the engine, so With the 0th and 5th orders as basic orders, it can be expanded into the following series for boat fishing.

f (t) ””Ao + ΣAN sin (No) t+φN > ・=(
11 Here, N=0.5, 1 1.5 2 ·ω, ω is the engine rotational angular speed, and φN is the phase angle with respect to the crank angle. Moreover, this equation shows the combustion stimulation force as vibration in the time domain.

Then, the even-order component of the combustion stimulation force f(t) is expressed as fA
(t), the odd-order component is fB (t), the first half-order component is fc (t), the second half-order component is fD (t),
Also, the DC component is A. Then, the above formula (1) becomes f(t)-A. +fA(t)+fn(t)+f
c (t) + f D (t)
-(21).

Here, fA (t)=ΣA2113 i n (2nωt+φ
2n)...(3) fn (t)- ΣA2n-18i n [(2n-1) ωt+
φ2n-1
...ke) fc (t) ΣA2n-1,5sin [(2n 1.5)
ωt+φ2n-1,5]
-(51fo (t) ΣA211-0.58 in [(2n-0,
5) ω is 10φ2n-0,5
...(6) (n=1.
2, 3. ...ω).

In addition, in the above formula (2), the DC component AO is omitted, and the following is written as follows:
Similarly), if expressed in the frequency domain, F(ω) − FA + F
B+Fc+FD...(It can be expressed as 71. Here, F
A, FB, Fc, and Fo are even-order components, odd-order components, first half-order components, and second half-order components when the combustion stimulation force is expressed in the frequency domain.

By the way, in the case of an in-line four-cylinder engine, the combustion state of each cylinder is similar under a constant load and a constant rotation speed.
You can think of it as just a time difference. Therefore, the combustion stimulation force in each cylinder is generated sequentially with a difference of 180' in crank angle and π/ω in time. Therefore,
Assuming that the firing order of each cylinder is 1 → 3 → 4 → 2, and using the combustion stimulation force of the first cylinder as a reference, this is expressed in the time domain as follows:
f+ (t) - f (t) = f A (t) + f n (t) +
f c (t)+fo(t)
...(In 8 frequency regions, Fl (ω) −FA +FA FC FD ・
...(9), the combustion stimulation force of the third cylinder, which is next in the ignition order, is f in the time domain, (t) = f (t + π/ω)
=-ΣAN sin [Nω(t+π/ω)+φN
]-ΣAN sin (Nωt+φN+Nπ)-Σ
A2n5in (2nωt+φ.〉 +ΣA21l−18in [(2n−1) ω to 1φ
211-1] +ΣA21l-15CO5[(2n-1,5) ωt+
φ211-1.5] +ΣA2n-0,5CO3[(2n-0,5)ωt+φ
2n-0,5] ... QOI, and in the frequency domain, using the imaginary unit i, F3
(ω) = FA FB + I Fc r F.

...(11) becomes. Similarly, for other cylinders, F2 (ω) −F A F B i
F c + i F .

...(12) F 4 (ω) −FA +FB
i Fc i FD (13).

Then, if the combustion stimulation force F, (ω) to F4 (ω) of each cylinder detected as pressure signal outputs A1 to A4 is known, then from the above equations (91, (11) to (13), Fl
(ω) + F2 (ω) 10 F3 (ω) + F4 (ω) 4 F A ... (14) F+
(ω) F2 (ω) F3 (ω) 10F4 (ω) -4F B ... (15) 1"+
(ω)F4(ω) −2(Fc +Fo) ...(16)F2
It can be expressed as (ω)F3(ω) 2 (−i Fc + i FD ) −(17).

Here, if we compare the left side of the above equations (14) to (17) with each order separator 121 to 124 shown in FIG. ．． ~12
These inputs result in outputs corresponding to the right sides of equations (14) to (17) being obtained from each separator 121 to 124. That is, the first separator 1
21 outputs only the even order component FA of the combustion stimulation force of each cylinder 2□ to 24, only the odd order component Fa is output from the second separator 12°, and the third and fourth separators 123,
The first and second half-order components FC and FD are outputted from 124, and in this way, the combustion stimulation force of each cylinder is separated into orders.

Then, the first to fourth coefficient multipliers 1 are applied to these order side outputs.
Coefficients a, b, c by 31-134.

When d is respectively multiplied, the outputs F,' to F4' (D1 to D4) of these coefficient multipliers 131 to 134 are as follows.

F ] ' -4a F A -
(18) F2 24bFB...
(19) F3 = 2 c (Fc + Fa)
−(20)F4 =2 d (i Fc +i
FD) - (21) Next, the outputs F1' to F4' of each coefficient multiplier 13□ to 134 obtained as above
(DI to D4) are input to the first to fourth adders 15 . 154, and are resynthesized by these adders 151 to 154 as follows so as to correspond to the combustion stimulation forces of the first to fourth cylinders 21 to 24.

In other words, from equation (18)+(19>+(2o)), Fl
=4aFA+4bFB +2c (Fc1FD)
...(22) Formula (18)-(19)+(
21), F 2 = 4 a F A 4 b
F B +2 d (i F c+i Fa)
- (23) Formula (18) - (19) - (2
From 1), F 3 = 4 a F A 4 b
F B 2 d (i F c+iFo>
...(24) Furthermore, formula (18) + (19
)-(20), F 4 = 4 a F A+4
b F B 2 C (F c + Fo)
...(25) These formulas (22) to (25
The resynthesis outputs F1 to F4 obtained in ) indicate the outputs E0 to E4 of the first to fourth adders 15□ to 154, and suppose that each coefficient is a = b = 1/4, c = d
= 1 / 2, Fl = F□, F2 =
F2. FB = F3, F4-F4, and the first to
Each cylinder 21 input to the fourth order separator 12, ~124
equals a combustion stimulation power of ~24.

However, in reality, in order to intensively suppress the odd-order components and the first and second half-order components, which are the cause of particularly unpleasant sound quality of in-vehicle noise, each of the above coefficients is set to, for example, a=0. b
=1/4. It is assumed that c=d=1/2. In other words, a large weight is given to the component that is desired to be suppressed.

In this case, the outputs Fl to F4 (El to E4) of the first to fourth adders 151 to 154 are F1=F
B+ F c 10F.

(-FIFA) ...(30)F2
=-FB-iFc +1FD (-F2 FA)...(31)F,
=-FB +iFc-iF.

(”=F3 FA) ・(32)
F4=FeFcF.

(-F4 FA) ... (33)
The even-order component FA is omitted from the combustion stimulation forces F1 to F4 for each cylinder.

Next, the output F1 of the first to fourth adders 15+ to 154
~F4 (E]~E4) are the first to fourth
The input is input to the converters 16□ to 164, but these converters 161 to 164 calculate the following equation, where X is the vibration of the mount part with respect to the combustion stimulation force Fi of each cylinder 21 (i-1 to 4). Using the transfer function Hi shown, these combustion stimulation forces Fi are converted into vibrations at the mount.

Hi=X/Fi...(34)
Therefore, the output G1 from these converters 16□ to 164
From the adder 17 that adds ~G4, X=F'+Hl
+F2 F2 +F3 F3 +F4 H4...(
35) The output ■ shown by is output.

Then, as F1 to F4 in this equation (35), those weighted on the order side shown in the above equations (30) to (33) are used, and the resulting output X(I) of the adder is The phase is inverted by a phase inverter 18, and its output is further amplified by a power amplifier 19 and sent to an exciter 8.

As a result, the vibration exciter 8 imparts to the mount member 6 a vibration having an opposite phase to the vibration obtained by removing the even-order component of the combustion stimulation force of each cylinder 2 to 24, and in the mount member 6, each cylinder 21 The odd-order components and the first and second half-order components of the combustion stimulation force from .about.24 are canceled out. Therefore, the noise inside the vehicle due to the vibrations transmitted to the vehicle body 7 via the mount member 6 has improved sound quality, consisting only of even-order components.

Next, a second embodiment of the first invention will be described. In addition,
In the following embodiments, the same components as those in the previous embodiments will be described using the same reference numerals.

As shown in FIG. 3, the control device 20 according to this embodiment has the following functions in each cylinder 2□--
There are four preamplifiers 211 to 214 to which combustion stimulation forces are inputted as pressure signal outputs A1 to A4 from the cylinder pressure sensors 31 to 34 provided in the cylinders 24, respectively, and outputs B1 to B4 of these preamplifiers 21□ to 214 are respectively inputted as pressure signal outputs A1 to A4. It has first to fourth order separators 22□ to 224 for input. Here, the configuration and input of these separators 22□ to 224 are the same as in the first embodiment, and therefore, each of the separators 221 to 22
Outputs 01 to C4 from 4 are also the same as in the first embodiment,
This is the value on the right side of equations (14) to (17) above.

In this embodiment, each of the order separators 22
The outputs 01 to C4 from □ to 224 are then converted into vibrations of the components in the mount member 6 using a transfer function when each order component of the combustion stimulation force is transmitted to the mount member 6. - input to the fourth converters 231 to 234,
Thereafter, regarding the outputs D1' to D4' of the respective order components converted into vibrations in these mount members 6, the first to
The fourth coefficient multiplier calculates predetermined coefficients a', bc',
d' are respectively multiplied. In that case, also in this embodiment, the above coefficients are, for example, a = O, b' =
1/4. By setting c' = d' -1/2, a large weight is given to the odd-order components and the first and second half-order components that are to be suppressed.

Then, each order component output E weighted in this way
1' to E4' are combined by an adder 25, the output G' is converted to vibration in the mount member 6 by a converter 26, and the output
is converted into anti-phase vibration by Then, this phase-inverted output J' is amplified by the power amplifier 28 and then sent to the vibrator 8 provided on the mount member 6.

Therefore, in this embodiment as well, in the mount member 6, the odd-order components and the first and second half-order components, which are weighted by a large proportion of the combustion stimulation force from each cylinder 2□ to 24, are intensively canceled out. As a result, only the even-order components are transmitted to the vehicle body, and the quality of the noise inside the vehicle is improved.

Next, an embodiment of the second invention of the present application will be described.

FIG. 4 shows a first embodiment of the present invention, in which a control device 30 according to this embodiment receives force signals indicating combustion stimulation force from cylinder pressure sensors 31 to 34 provided in each cylinder 21 to 24. 4 preamplifiers 3 that amplify outputs A□ to A4]-
1 to 314 and these outputs B1 to B4 to each cylinder 21.
24 to the mount member 6 to convert them into vibrations in the mount member 6, respectively.
Converters 321-324 and these converters 321-32
an adder 33 that adds 1 to 4 to the output of 4, and a converter 34 that converts the output into vibration in the mount member 6
, a phase inverter 35 that inverts the phase of the output M, and a power amplifier 36 that amplifies the output and sends it to the vibrator 8 provided on the mount member 6.

According to this embodiment, the pressure actually occurring in each cylinder 21 to 24 (combustion stimulation force) is directly detected by each cylinder pressure sensor 31 to 34, and the first to fourth transducer 32
□ to 324, these pressures are converted into vibrations when transmitted from the cylinder to the mount member 6 as vibrations using a preset transmission coefficient. Therefore, the output obtained by combining 4 with the output of each converter 32□-324 by the adder 33 is the combustion stimulation force generated in each cylinder 21-24 that is
This output is converted into a vibration form by the converter 34, the phase is inverted by the phase inverter 35, and then the vibration is transmitted to the vibrator 8.
By sending the engine vibration to the mount member 6, engine vibrations are effectively canceled out. In particular, the vibration applied by the vibrator 8 is set based on the combustion stimulation force in each cylinder 21 to 24, in other words, the source of the vibration transmitted to the vehicle body 7 via the mount member 6. Therefore, the vibration can be more reliably reduced compared to the case where the vibration of the mount is detected and the vibration of the opposite phase is applied to the mount, and howling does not occur in the mount. be.

FIG. 5 shows a second embodiment of the second invention. In this embodiment, a bearing force is applied to each main bearing portion 21' to 25' of the engine 1 as a sensor for detecting engine vibration. A total of five bearing force sensors 31' to 3 each detect
5' is installed.

Then, as in the embodiment of FIG. 4, each of the sensors 3
1 to 5 converters 421 to 425 into which the force signal outputs A1 to A5' from 1 to 35' are amplified by preamplifiers 411 to 415, respectively, and then input, and the outputs of these converters 421 to 42. an adder 43 that adds 1′ to ′, and a converter 4 that converts the output L′ into a vibration form.
4, a phase inverter 45 for inverting the phase of the output M', and a power amplifier 46.
However, in this embodiment, the first
~The fifth converter 42□~425 is connected to each main bearing portion 2□'~25
The outputs B1 to 415 of the preamplifiers 411 to 415 are calculated using the transfer function when the bearing force at 1 is transmitted to the mount member 6.
It is designed to convert B5 respectively.

Therefore, in this embodiment, the bearing force of each main bearing section 2□-25' as a source of vibration in the mount member 6 is detected, and the bearing force when these bearing forces are transmitted to the mount member 6 is detected. Vibrations with the opposite phase of the vibrations are applied to the mount member 6 by the vibrator 8. As a result, in the mount member 6, similarly to the embodiment described above,
Engine vibrations are more reliably reduced without causing howling, and the level of noise inside the vehicle due to transmission of vibrations from the mount member 6 to the vehicle body 7 is effectively reduced.

(Effects of the Invention) As described above, according to the first invention of the present application, among the various order components of engine vibration, the specific order components that cause particularly unpleasant interior noise are canceled out in a focused manner. As a result, the sound quality of in-vehicle noise is improved, and according to the second invention, transmission of engine vibrations to the vehicle body is effectively reduced without causing humming at the engine mount portion. Become. In this way, any of the inventions will improve the interior noise of the vehicle.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a first embodiment of the first invention;
Figures (1) and (2) are block diagrams showing the configuration of each order separator in this embodiment, Figure 3 is a block diagram showing the second embodiment of the first invention, and Figures 4 and 5 are block diagrams showing the configuration of each order separator in this embodiment. 1st. FIG. 6 is a block diagram showing a second embodiment. 1...Engine, 21-24...Cylinder, 21-25
′...Main bearing portion, 31-34...Combustion stimulation force detection means (in-cylinder pressure sensor), 31-35...Bearing force detection means (bearing force sensor), 6...Mount member, 8. ... Vibrator, 121~124°22, ~224... Output means for each order (order separator), 13□~134, 241~24
4... Weighting means (coefficient multiplier), 161 to 164
231~234.32□~324.42□~425...
Conversion means (converter), 18, 27.35.45... Phase inversion means (phase inverter), 19.28, 36.46.
...Driving means (power amplifier).

Claims (2)

[Claims] (1) A mounting device for a power unit, which is equipped with a vibrator that applies vibrations to the mount portion to offset engine vibrations, and includes combustion stimulation force detection means that detects the combustion stimulation force of each cylinder in the engine. , the signal output from these detection means is input, and the input is divided into an order corresponding to the number of explosions per engine rotation or an integral multiple thereof, and an order in which these orders are separated by 0.5 orders. A plurality of order-specific output means for separating and outputting each order, a order-specific weighting means for weighting the output for each order outputted from these output means, and outputs weighted for each order by the weighting means. Conversion means for converting into vibration output at the mount part using a predetermined transmission characteristic, phase inversion means for inverting the phase of the output of this conversion means, and drive means for driving the vibrator with the output of this phase inversion means. A power unit mounting device comprising: (2) A power unit mounting device that is equipped with a vibrator that applies vibration to the mount to offset engine vibration, and detects the combustion stimulation force of each cylinder or the bearing force of each main bearing of the crankshaft. a plurality of converting means that convert signal outputs from these detecting means into vibrations in the mount using predetermined transmission characteristics for each cylinder or each main bearing, and these converting means. 1. A mounting device for a power unit, comprising: a phase inverting means for inverting the phase of a vibration output obtained by adding outputs from the oscillators; and a driving means for driving the vibrator with the output of the phase inverting means.