JPH0242496Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a roll stopper control device that effectively prevents excessive rolling of the engine by operating a roll stopper that prevents the engine from rolling for a certain period of time when the brake of an automobile is pressed.

When the driver steps on the brake, the engine installed in a car attempts to move forward due to inertia and exerts engine braking force, causing a large change in the load condition acting on the engine. Rolling is likely to occur. This kind of behavior needs to be suppressed by strongly regulating engine movement, but if the engine movement is strongly regulated at all times, engine vibrations will be transmitted directly to the vehicle body when the engine is idling, causing harm to the occupants. This may cause discomfort to the person.

This idea was made in view of the above points,
The object is to provide a roll stopper control device which drives a roll stopper for a certain period of time to prevent engine rolling when the brake is stepped on, and prevents the engine from rolling for a certain period of time after the brake is stepped on.

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 to alleviate 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. 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, when the connecting member 5 vibrates in the direction of arrow D due to the rolling of the engine 11, 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. It's summery. In this case, when the rotary valve 24 is rotated to close the first orifice 22, chamber A and chamber B are connected only through the second orifice 23.
, the amount of oil passing between chamber A and chamber B becomes smaller, and both chambers A and B
The pressure difference between the two increases (a state where the damping force is large),
Although the amount of engine vibration toward the vehicle body increases, rolling motion of the engine 11 can be effectively suppressed. On the other hand, when the first orifice 22 is opened due to the rotation of the rotary valve 24, the first orifice 22 and the second orifice 2
3, the amount of oil passing between chambers A and B increases, and the pressure difference between chambers A and B becomes smaller (damping force is small), the function of preventing rolling of the engine 11 is reduced, but the amount of engine vibration transmitted to the vehicle body is reduced.

Hereinafter, a roll stopper control device according to an embodiment of this invention will be explained with reference to FIG.
In Figure 4, 31 is battery, 32 is IG
(ignition) switch. The brake switch 33 is connected to the terminal "IG" of this IG switch 32.
and brake lamp 34 are connected in series. The brake switch 33 is a brake (not shown)
When is stepped on, it closes and the brake lamp 34 lights up. A connection point between the brake switch 33 and the brake lamp 34 is connected to one end of a relay coil 35. The other end of this relay coil 35 is grounded. Also, 35S is a relay switch,
When the relay coil 35 is excited, it is closed. The relay switch 35S turns on in conjunction with the turning on of the brake switch 33. Furthermore, a resistor R is connected to one end of the relay switch 35S.
1, a voltage U1 (for example 8V) is applied.
The connection point between the resistor R1 and the relay switch 35S is input to a timer circuit 37 via an inverter 36. This timer circuit 37 outputs an H level for a certain period of time after receiving an H level signal. Further, the output of the timer circuit 37 is input to a solenoid drive circuit 38. This solenoid drive circuit 38 outputs a drive signal a to the front roll stopper 16 and a drive signal b to the rear roll stopper 17 shown in FIG. In other words, when an H level signal is input to the solenoid drive circuit 38,
The drive signals a and b each become active.

Next, the operation of this device configured as described above will be explained. First, connect the IG switch 32 to the terminal "IG"
Close to. and the exerciser's accelerator (not shown)
The operation puts the car into driving mode. At this point, if you are not stepping on the brake, press brake switch 3.
3 is open. For this reason, relay switch 35S
The inverter 36 is also opened, and the voltage V1, that is, the H level signal is input to the inverter 36. Therefore, the input of the timer circuit 37 becomes L level. Therefore, the output of the timer circuit 37 becomes L level, and the L level signal is input to the solenoid drive circuit 38. Therefore, the drive signals a and b output from the solenoid drive circuit 38 do not become active. Therefore, when the brake is not depressed, the front roll stopper 16 and the rear roll stopper 17 are in the first position.
The orifice 22 and the second orifice 23 are in an open state, and the damper function against rolling of the engine 11 becomes soft, effectively preventing engine vibration from being transmitted to the vehicle body.

Next, the case where the brake is depressed will be explained. When you step on the brake, the brake switch 33
closes. Therefore, an exciting current flows through the relay coil 35, and the relay switch 35S is closed.
Therefore, the ground potential (L level) is supplied to the inverter 36. Therefore, an H level signal is input to the timer circuit 37. As a result, the output of the timer circuit 37 remains at the H level for a certain period of time. Therefore, the drive signals a and b output from the solenoid drive circuit 38 remain active for a certain period of time.

According to the above embodiment, the roll stopper is switched to a state where the rolling of the engine relative to the vehicle body is suppressed for a certain period of time immediately after the brake is operated, so even if an excessive inertial force is applied to the engine due to the brake operation, the rolling This has the effect of suppressing the

In addition, since it is determined that the brakes are being applied based on the signal from the brake switch that is linked to the brake pedal, by the time the vehicle actually decelerates and excessive inertia is applied to the engine, the roll stopper has already been set to "suppress rolling." Therefore, the timing of the switching is delayed and rolling does not occur, and optimal control can always be performed. In other words, with other methods, such as feedback control, which measures the amount of engine roll using a sensor and always controls the engine to maintain the optimum state, rolling actually occurs in the engine before control is applied, and the control system Optimal control cannot be performed due to problems such as followability.

Furthermore, in the case of the present invention, since there is no need for a feedback control circuit, a simple and inexpensive device consisting only of a combination of a brake switch and a timer circuit is effective.

As detailed above, according to this invention, the roll stopper is switched to a state that suppresses rolling of the engine relative to the vehicle body for a certain period of time immediately after the brake is operated, so that an excessive inertial force is applied to the engine due to the brake operation. This has the effect of suppressing the rolling even if

In addition, since it is determined that the brakes are being operated based on the signal from the brake switch that is linked to the brake pedal, the roll stopper has already been set to "suppress rolling" by the time the vehicle actually decelerates and excessive inertia is applied to the engine. Therefore, the switching timing is not delayed and rolling does not occur, and optimal control can always be performed. In other words, with other methods, such as feedback control, which measures the amount of engine roll using a sensor and controls the engine to always maintain the optimum state, rolling actually occurs in the engine before control is applied, and the control system Optimal control cannot be performed due to problems such as followability.

Furthermore, in the case of the present invention, since there is no need for a feedback control circuit, a simple and inexpensive device consisting only of a combination of a brake switch and a timer circuit is effective.

[Brief explanation of drawings]

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. 31...Battery, 35...Relay coil,
37...Timer circuit, 38...Solenoid drive circuit.

Claims (1)

[Scope of utility model registration request] A roll stopper device that is interposed between the engine and the vehicle body and has a roll stopper that can be switched between a state that allows the engine to roll with respect to the vehicle body and a state that suppresses the rolling, and a switching means that switches the state of the roll stopper. The switching means includes a brake switch interlocked with the brake pedal, and a timer circuit that outputs a signal for a certain period of time based on a signal obtained from the brake switch when the brake pedal is pressed, and the switching means is configured to output a signal from the timer circuit. A roll stopper device characterized in that the roll stopper is placed in a state where rolling is suppressed for a certain period of time based on a signal.