JPH0242490Y2 - - Google Patents

Description

[Detailed description of the invention] This invention drives a roll stopper that prevents the engine from rolling for a predetermined period of time when the engine speed is below a reference speed, the vehicle speed is above the reference speed, and the amount of change in accelerator pedal depression is above a predetermined amount. The present invention relates to a roll stopper control device.

The engine installed in a car has a constant engine rotation speed (e.g.
3000r.pm) or less when the accelerator is suddenly depressed, large rolling tends to occur, and such excessive rolling needs to be suppressed by strongly regulating the engine movement, but it is necessary to strongly regulate the engine movement at all times. Then, even when the engine is idling, engine vibrations are transmitted to the vehicle body, 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 drives a roll stopper that prevents engine rolling when the engine speed is below a reference speed, the vehicle speed is above the reference speed, and the amount of change in accelerator pedal depression is greater than a certain amount. It is in.

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 above is a transmission mount 13.
is placed on the vehicle body 14. Further, the engine 11 is mounted on the vehicle body 14 by a left mount 15. Therefore, the engine 11 and the transmission 12 installed on the side thereof are mounted on the vehicle body 14 by the transmission mount 13 and the left mount 15. Also,
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 to alleviate the rolling motion of the engine 11, and the performance of the damper function can be electrically controlled. Here, FIG. 2 is a side view showing the positional relationship between the front roll stopper 16 and the rear roll stopper 17.

Next, the basic principles of the front roll stopper 16 and the rear roll stopper 17 will be explained using FIG. In FIG. 3, a chamber A is formed in the casings 3 and 4 made of an elastic material such as rubber.
and chamber B are each filled with oil, and a separation member 21 is provided between chamber A and 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 inner diameter of the first orifice 22 is the same as that of the second orifice 23.
It is formed much larger than the. A rotary valve 24 is provided inside the first orifice 22, and the rotary valve 24 is rotated by 90 degrees by a solenoid valve (not shown) to open the first orifice 22.
Opening/closing control is performed. 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, along with the rolling motion of the engine 11,
When the connecting member 5 vibrates in the direction of arrow D, this vibration is attenuated by the orifices 22 and 23, and is transmitted to the separating member 21 as minute vibrations in the direction of arrow C. In this case, when the rotary valve 24 is rotated to close the first orifice 23, chamber A and chamber B are connected only through the second orifice 23.
Since oil is distributed between chambers A and B,
The amount of oil passing between chambers A,
The pressure difference at B increases (state of large damping force),
Although the amount of engine vibration transmitted to the vehicle body side increases, rolling motion of the engine 11 can be effectively suppressed. On the other hand, the rotary valve 24
When the first orifice 22 is opened due to the rotation of As the amount increases, the pressure difference between both chambers A and B becomes smaller (a state in which the damping force is small), and the function of preventing rolling of the engine 11 decreases, but the amount of engine vibration transmitted to the vehicle body 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 includes a waveform shaping circuit 35, a waveform shaping circuit 36 that shapes the pulse width into a constant time, a low pass filter 37, and a comparison circuit 38. 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. Further, the waveform shaping circuit 36 shapes the pulse width of the pulse signal outputted from the waveform shaping circuit 35 to a constant time. The pulse signal output from the waveform shaping circuit 36 is input to a low-pass filter 37. This low pass filter 37
The comparison circuit 38 compares the voltage proportional to the engine speed.
Output to. This comparison circuit 38 outputs an H signal when the engine speed is below the reference speed, for example 3000 rpm.
Outputs level signal.

Further, 39 is a vehicle speed sensor that detects whether the vehicle is running or not. This vehicle speed sensor 39 outputs a vehicle speed pulse signal having a number of pulses depending on the vehicle speed.
A vehicle speed pulse signal output from the vehicle speed sensor 39 is input to a vehicle speed detection circuit 40. This vehicle speed detection circuit 40 includes a waveform shaping circuit 41, a frequency dividing circuit 42,
Waveform shaping circuit 43, timer circuit 44, comparison circuit 4
Consisting of 5. The waveform shaping circuit 41 shapes the waveform of the input vehicle speed pulse signal.
Furthermore, the cycle of the vehicle speed pulse signal outputted from the waveform shaping circuit 41 is divided by half in a frequency dividing circuit 42. Furthermore, the pulse width of the output of the frequency dividing circuit 42 is shaped by a waveform shaping circuit 43 to a constant time. Next, the waveform shaping circuit 4
The output of 3 is sent to the comparison circuit 45 via the timer circuit 44.
are input and compared. Here, for example, the vehicle speed is 3
If the speed exceeds Km/h, the output of the comparison circuit 45 becomes H level. Also, 46 is a power supply reset circuit,
This power supply reset circuit 46 outputs a reset signal to the clear terminal CL of the D-type flip-flop in the comparison circuit 45 when the power is turned on.

Further, 47 is an accelerator opening sensor that detects the amount of depression of the accelerator. The output of the accelerator opening sensor 47 is input to an accelerator speed detection circuit 48. This accelerator speed detection circuit 48 outputs an H level signal when the amount of change in the input accelerator opening is equal to or greater than a predetermined amount. The above-mentioned predetermined amount is set to an accelerator operation amount where the engine speed changes suddenly and rolling may occur. For example, when the accelerator is suddenly depressed, the accelerator speed detection circuit 48 outputs an H level signal.

Further, the outputs of the engine rotation detection circuit 34, vehicle speed detection circuit 40, and accelerator speed detection circuit 48 are respectively connected to the timer circuit 5 through an AND circuit 49.
It is input to 0. This timer circuit 50 outputs an H level signal for a predetermined time after receiving the H level signal. The above-mentioned predetermined time is set to be a sufficient time for the rolling to attenuate after it occurs. The output of the timer circuit 50 is the solenoid drive circuit 5
1 is input. This solenoid drive circuit 51 sends a drive signal a to the front roll stopper 16 and a drive signal b to the rear roll stopper 17 shown in FIG.
Output. That is, when an H level signal is input to the solenoid drive circuit 51, the drive circuits a and b
becomes active.

Next, the operation of this invention configured as described above will be explained. When the engine rotation speed is equal to or higher than the reference rotation speed (3000 rpm), the output of the engine rotation speed detection circuit 34 becomes L level. Further, when the vehicle speed is lower than the reference speed (3 km/h), the output of the vehicle speed detection circuit 40 becomes L level.
Further, when the amount of change in the accelerator opening is less than or equal to a predetermined amount, the output of the accelerator speed detection circuit 48 becomes L level. Here, the engine rotation detection circuit 3
4 or when at least one of the outputs of the vehicle speed detection circuit 40 or the accelerator speed detection circuit 48 is at the L level, the output of the AND circuit 49 is at the L level.
level. Therefore, since the output of the timer circuit 50 is at L level, the drive signals a and b output from the solenoid drive circuit 51 are not active. Therefore, the front roll stopper 16 and the rear roll stopper 17 are connected to the first orifice 22.
The second orifice 23 is opened, and the damper function against the rolling motion of the engine 11 becomes soft, effectively preventing engine vibration from being transmitted to the vehicle body.

On the other hand, the engine rotation speed is the standard rotation speed (3000r.
pm) or less, the output of the engine rotation speed detection circuit 34 becomes H level. Further, when the vehicle speed is equal to or higher than the reference speed (3 km/h), the output of the vehicle speed detection circuit 40 becomes H level. Further, when the amount of change in the accelerator opening is equal to or greater than a predetermined amount, the output of the accelerator speed detection circuit 48 becomes H level. Here, when the outputs of the engine speed detection circuit 34, vehicle speed detection circuit 40, and accelerator speed detection circuit 48 are each at H level, the output of the AND circuit 49 becomes H level. Therefore, the timer circuit 50
The output of is in the H level state for a certain period of time. Therefore, the drive circuit signals a and b output from the solenoid drive circuit 51 remain active for a predetermined period of time.

In other words, the engine speed is the reference speed (3000r.
pm) or below, if you operate the accelerator so that the amount of change in accelerator opening is greater than the specified amount,
By closing the first orifice 22 for only a predetermined time at the moment the accelerator is operated, the roll stopper is activated and excessive rolling of the engine is effectively prevented.

Here, when the accelerator is operated while driving, if the engine speed suddenly changes in response to the accelerator operation, a torque fluctuation occurs in the drive system after a short delay, and the engine rolls significantly due to the reaction force. In other words, in this embodiment, as described above, it is possible to drive the roll stopper the moment the accelerator is operated, so when the engine actually rolls after the access operation, the drive of the roll stopper is completed and the damper function is activated. It is possible to reliably suppress rolling by working hard.

As detailed above, according to the present invention, the roll stopper is inactive during idling and normal driving, the amount of engine vibration transmitted to the vehicle body is reduced, the riding comfort is improved, and the engine speed is reduced to the reference speed ( 3000r.pm) or lower and the engine rolls when the accelerator is operated so that the change in accelerator opening is more than the specified amount,
This has the effect of reliably preventing engine rolling by driving the roll stopper for a predetermined period of time immediately before engine rolling occurs, which occurs a little later than a sudden change in engine speed.

[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, 40...Vehicle speed detection circuit, 48...Accelerator speed detection circuit, 5
0...Timer circuit, 51...Solenoid drive circuit.

Claims (1)

[Scope of utility model registration request] a roll stopper that is interposed between the vehicle body and the engine and is driven to suppress relative displacement between the vehicle body and the engine in order to prevent rolling of the engine when a drive signal is input to a drive section formed of a solenoid; A solenoid drive circuit that supplies a drive signal to the solenoid, a vehicle speed detection means that detects whether the vehicle speed is equal to or higher than a reference speed to determine whether the vehicle is running, and a vehicle speed detection means that detects the rotation speed of the engine and detects the engine rotation speed. an engine rotation speed detection means for detecting whether the engine rotation speed is below the reference rotation speed; an accelerator speed detection means for detecting whether the amount of change in the accelerator pedal depression is greater than or equal to a predetermined amount; is detected, and the engine rotation speed detection means detects that the engine rotation speed is below the reference rotation speed, and the accelerator speed detection means detects that the amount of change in accelerator depression is equal to or more than a predetermined amount, the above-mentioned operation is performed only for a predetermined period of time. A roll stopper control device comprising: a timer circuit that operates a solenoid drive circuit to drive the roll stopper.