JPH0242495Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a roll stopper control device that drives a roll stopper that prevents rolling of the engine for a predetermined period of time when the amount of change over time in the engine speed exceeds a certain amount.

Engines installed in automobiles tend to undergo large rolling when the engine speed changes significantly, and such excessive rolling needs to be suppressed by strongly regulating engine movement. If the movement of the engine is strongly restricted at all times, engine vibrations are transmitted to the vehicle body when the engine is idling, causing discomfort to the occupants.

This idea was made in view of the above points,
The purpose is to provide a roll stopper control device that efficiently prevents excessive rolling of the engine by driving a roll stopper for a predetermined period of time to prevent engine rolling when the temporal change in engine speed exceeds a certain amount. It's about doing.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 explains the location where the engine is loaded in a FF vehicle. In Figure 1,
11 is an engine, and 12 is a transmission installed on the side of the engine 11. The transmission 12 is mounted on a vehicle body 14 by a transmission mount 13. Furthermore, the engine 11 is mounted on the vehicle body 14 by a left mount 15. Therefore, the above mission mount 1
3 and the left mount 15 above to connect the engine 1.
1 and a transmission 12 installed on the side thereof are placed on the vehicle body 14. Further, a front roll stopper 16 is provided on the front surface of the engine 11, and a rear roll stopper 17 is provided on the rear surface. The front roll stopper 16 and the rear roll stopper 17 have a damper function for alleviating the rolling of the engine 11, and the performance of the damper function can be electrically controlled. Here, FIG. 2 shows the front roll stopper 16 and rear roll stopper 17.
It is a side view showing the positional relationship of.

Next, the basic principles of the front roll stopper 16 and the rear roll stopper 17 will be explained using FIG. In FIG. 3, chambers A and B formed in casings 3 and 4 made of elastic material such as rubber are filled with oil, and chamber A
A separation member 21 is provided between the chamber B and the chamber B.
This separation member 21 has two through holes, one of which is called a first orifice 22 and the other a second orifice 23. Here, the first
The inner diameter of the orifice 22 is formed to be considerably larger than that of the second orifice 23. And the first above
A rotary valve 24 is provided within the orifice 22, and the rotary valve 24 is rotated 90 degrees by a solenoid valve (not shown) to control opening and closing of the first orifice 22. Incidentally, the casings 3 and 4 are integrally connected by a connecting member 5, and a bracket 6 connected to the engine 11 is attached to the connecting member 5. on the other hand,
A bracket 7 fixed to the vehicle body is connected to one end of the separation member 21.

Therefore, when the connecting member 5 vibrates in the direction of arrow D due to the rolling motion of the engine 11, this vibration is attenuated by the orifices 22 and 23 and transmitted to the separating member 21 as minute vibrations in the direction of arrow C. It has become a thing. In this case, if the rotary valve 24 is rotated to close the first orifice 22, the oil between chambers A and B will flow only through the second orifice 23. As the amount of passage becomes smaller, the pressure difference between both chambers A and B becomes larger (state of large damping force), and the amount of engine vibration transmitted to the vehicle body increases, but the rolling motion of the engine 11 is effectively suppressed. be able to. On the other hand, when the first orifice 22 is opened due to the rotation of the rotary valve 24, the oil between the chambers A and B flows through the first orifice 22 and the second orifice 23. As the amount of oil passing between chambers A and B increases, the pressure difference between chambers A and B decreases (damping force is small), and the function to prevent engine rolling decreases, but The amount of vibration transmitted becomes smaller.

Hereinafter, a roll stopper control device according to an embodiment of this invention will be explained with reference to FIG.
In Fig. 4, 31 is an ignition coil;
2 is a contact point provided on the distributor, and 33 is a spark plug. By opening and closing this contact point 32, a high voltage is applied to the ignition plug 33, causing a spark to fly into the cylinder. In this embodiment, the rotational speed of the engine is obtained from signals accompanying the opening and closing of the contact point 32. In other words, ignition coil 31
The signal at the connection point between the contact point 32 and the contact point 32 is input to an engine speed detection circuit 34 that outputs a voltage proportional to the engine speed. The engine rotation speed detection circuit 34 is composed of a waveform shaping circuit 35, a waveform shaping circuit 36 that shapes the pulse width to a constant time, and a low-pass filter 37. That is, the waveform shaping circuit 35 performs waveform shaping such as noise removal on the pulse voltage having the same number of pulses as the engine rotational speed. Also,
The waveform shaping circuit 36 shapes the pulse width of the pulse signal output from the waveform shaping circuit 35 to a constant time. A voltage proportional to the engine rotation speed output from the engine rotation speed detection circuit 34 is input to an engine rotation speed detection circuit 38. This engine rotational speed detection circuit 38 outputs an H level signal when the amount of change in the input engine rotational speed exceeds a certain value. The output signal of the engine speed detection circuit 38 is input to a timer circuit 39. This timer circuit 39 outputs an H level signal for a predetermined period of time after receiving the H level signal. Further, the output of the timer circuit 39 is input to a solenoid drive circuit 40 drive section. This solenoid drive circuit 40 outputs a drive signal a to the front roll stopper 16 and a drive signal to the rear roll stopper 17 shown in FIG. In other words,
When an H level signal is input to the solenoid drive circuit 40, the drive signals a and b become active.

Next, the operation of this device configured as described above will be explained. First, as explained in the configuration section, the engine rotation speed detection circuit 38 outputs a voltage proportional to the engine rotation speed. A voltage signal proportional to the engine rotation speed outputted from the engine rotation speed detection circuit 38 is input to the engine rotation speed detection circuit 38, and the amount of change in the engine rotation speed is observed. Here, when the amount of change in the engine rotational speed is less than a certain amount, the output of the engine rotational speed detection circuit 38 is at the L level. Therefore, the output of the timer circuit 39 becomes L level, so the drive signals a and b output from the solenoid drive circuit 40 do not become active. Therefore, when the amount of change in the engine speed is less than a certain amount, the front roll stopper 16 and the rear roll stopper 17 are in a state where the first orifice 22 and the second orifice 23 are open, and the engine 1
The damper function against rolling of No. 1 is soft, and transmission of engine vibration to the vehicle body is effectively prevented.

On the other hand, if the amount of change in the engine rotational speed is equal to or greater than a certain amount, the output of the engine rotational speed detection circuit 38 becomes H level. Therefore, since the H level signal is input to the timer circuit 39, the output of the timer circuit 39 remains at the H level for a predetermined period of time. Therefore,
The drive signals a and b output from the solenoid drive circuit 40 remain active for a predetermined period of time. In other words, when the amount of change in engine speed exceeds a certain amount, the first orifice 22 is closed only for a predetermined period of time, and the roll stopper is activated to harden the damper function against rolling of the engine and effectively prevent excessive rolling of the engine. It is intended to be prevented.

As detailed above, according to this invention, when the amount of temporal change in engine speed that is likely to cause excessive rolling in the engine exceeds a certain amount, a roll stopper that prevents engine rolling is driven for a predetermined period of time. In this way, the damper function for the engine is made hard, so that excessive rolling of the engine can be efficiently prevented.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the loading location of the engine in a FF vehicle, Figure 2 is a side view of Figure 1, Figure 3 is a diagram showing the basic principle of the roll stopper, and Figure 4 is an example of an embodiment of this invention. It is a figure showing a roll stopper control device. 34...Engine rotation speed detection circuit, 38...Engine rotation speed detection circuit, 39...Timer circuit,
40... Solenoid drive circuit.

Claims (1)

[Scope of utility model registration request] an engine mounted so as to be movable relative to the vehicle body; and an engine installed between the vehicle body and the engine to prevent rolling of the engine when a command signal is supplied to the drive unit. A roll stopper that operates to suppress relative displacement with the engine, an engine rotation speed detection means for detecting the rotation speed of the engine, and a temporal change in the engine rotation speed detected by the engine rotation speed detection means is constant. means for detecting whether the amount of change over time in the engine speed is equal to or greater than a certain value, and supplying to the drive section a command signal for operating the roll stopper for a predetermined period of time when the means detects that the amount of change over time in the engine speed is equal to or greater than a certain value. A roll stopper control device comprising a timer means.