JPH0216892Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is designed to intermittently apply current to the solenoid after the current flowing to the solenoid that drives the roll stopper that prevents the engine from rolling is turned off. The present invention relates to a roll stopper control device that reduces noise generation.

The engine installed in a car generates large rolling when the load condition acting on the engine changes significantly, such as by sudden operation of the accelerator or changing gears of an automatic transmission. It is considered that when the temperature changes, the solenoid that drives the roll stopper is energized to harden the engine mounting condition. However, when the solenoid is de-energized, the roll stopper suddenly hits the stopper due to the force of the leader spring, resulting in an impact noise.

This idea was made in view of the above points,
The purpose of this is to intermittently apply current to the solenoid after the current flowing to the solenoid that drives the roll stopper that prevents engine rolling is turned off, and the return spring force of the roll stopper reduces the impact noise caused by sudden contact with the stopper. An object of the present invention is to provide a roll stopper control device that can perform the following functions.

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. Further, the engine 11 is mounted on the vehicle body 14 by a left mount 15. Therefore, the mission mount 13
and the engine 11 and the transmission 1 installed on this side by the left mount 15
2 is 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.
is provided. The front roll stopper 16 and the rear roll stopper 17 are connected to the engine 11.
It has a damper function that alleviates the rolling motion of the vehicle in the longitudinal direction, and the performance of the damper function can be controlled electrically. 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, chambers A and B formed in casings 3 and 4 made of an elastic material such as rubber are each filled with oil, and a separation member 21 is provided between chambers A and 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 formed larger than that of the second orifice 23. A rotary valve 24 is provided within the first 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 is transmitted to the separating member 21 as a minute vibration in the direction of arrow C. It is becoming. In this case, when the rotary valve 24 is rotated to close the first orifice 23, the oil in the chambers A and B will flow only through the second orifice 23.
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, 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, oil flows between chambers A and B, so 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 the rolling of the engine 11 is reduced, but the amount of engine vibration transmitted to the vehicle body is reduced.

Next, a roll stopper control device according to an embodiment of this invention will be described with reference to FIG.

FIG. 4 is a block diagram showing the roll stopper control device, and the detailed structure within each block is shown in FIG. In FIG. 4, 31 is a potentiometer for detecting the throttle opening of the engine.

A detection signal proportional to the throttle opening degree generated by the potentiometer 31 is sent to a throttle opening/closing speed detection circuit 32 which detects the opening/closing speed of the throttle.
is output to. This throttle opening/closing speed detection circuit 32 outputs an H level signal when the throttle opening speed is above a certain value or when the throttle closing speed is above a certain value. The signal is also output to a throttle opening detection circuit 33 which detects whether the throttle opening generated in the potentiometer 31 is below a certain value. This throttle opening detection circuit 33 outputs an L level signal when the throttle opening is below a certain value. Further, 34 is a rotation speed sensor that detects the rotation speed of the engine. The rotational speed signal output from the rotational speed sensor 34 is sent to an engine rotational speed determination circuit 35 that determines whether the engine rotational speed is below a certain value.
is output to. This engine rotation speed determination circuit 35
When the engine speed is below a certain value, the
Outputs level signal. The output signals of the throttle opening degree detection circuit 33 and the engine speed determination circuit 35 are input to an OR circuit 36, respectively.
Further, 37 is a gear shift signal that receives gear shift signals A and B output from an electronically controlled automatic transmission (not shown), and detects whether or not the gear has been shifted based on the signals A and B. This is a presence/absence determination circuit.
In other words, the gear shift presence determination circuit 37 determines whether the gear has been shifted from "1st gear" to "4th gear" based on the signals A and B, and selects "1st gear" to "4th gear".
When the gear is shifted to , it outputs an H level signal. The output signal of the OR circuit 36 and the output signal of the gear shift determination circuit 37 are input to an AND circuit 38, respectively. 39R is an "R" range position switch that is turned on when the automatic transmission select lever (not shown) is set to the reverse R position, and 39D is an "R" range position switch that is turned on when the select lever (not shown) of the automatic transmission is set to the drive D position. This is the “D” range position switch that is turned on. The above “R” range position switch 39 and the above “D” range position switch 3
The output of 9D is output to the inhibitor switch ON/OFF determination circuit 39. This inhibitor switch
The ON-OFF determination circuit 39 outputs an H level signal each time the "R" position switch 39R or the "D" position switch 39D is turned on or off. Further, 40 is an external control switch that is turned on when testing the roll stopper.
The operation signal of this external control switch 40 is input to an input interface circuit 41, which outputs a signal of a different level depending on the state of the switch 40. That is, the input interface circuit 41 outputs an H level signal when the external control switch 40 is turned on. The outputs of the throttle opening/closing speed detection circuit 32, the AND circuit 38, the inhibitor switch ON/OFF determination circuit 39, and the input interface circuit 41 are each output from an OR circuit 4.
2 to the timer circuit 43. This timer circuit 43 drives and controls the solenoid drive circuit 44 for a certain period of time when an H level signal is input.
This solenoid drive circuit 44 controls the excitation of a solenoid 46 of a solenoid valve that controls the opening and closing of the rotary valves 24 of the roll stoppers 16 and 17. When the solenoid 46 is energized, the rotary valve 24 is rotated 90 degrees from the state shown in FIG. 3, so that the first orifice 22 is closed.
Further, when the solenoid 46 is de-energized, the rotary valve 24 is returned to the state shown in FIG.
The first fringe chair 22 is opened.

Incidentally, the output of the input interface circuit 41 is output to a chopper circuit 45. This chopper circuit 45 performs chopper control on the falling edge of the timer pulse output from the timer circuit. Further, the output of the input interface circuit 41 is input to the chopper circuit 45, and when the output of the input interface circuit 41 becomes H level,
The chopper control performed by the chopper circuit 45 is stopped. The output of this solenoid drive circuit 44 is connected to one end of a solenoid 46 of a solenoid valve that controls the opening and closing of the rotary valves 24 in the front roll stopper 16 and rear roll stopper 17. Furthermore, the other end of this solenoid 46 is connected to the anode of a battery 47. Note that the cathode of this battery 47 is grounded. The output of the solenoid drive circuit 44 is output to a high temperature detection circuit 48.
This high temperature detection circuit 48 detects that the solenoid current flowing in the solenoid drive circuit 44 decreases when the solenoid generates heat and reaches a high temperature, and when the solenoid current is below a certain value, the timer circuit 43 Outputs level signal.

When the L level signal is inputted to the timer circuit 43 from the high temperature detection circuit 48, the timer is forcibly stopped.

Incidentally, the anode of the battery 47 is connected to a stabilized power supply circuit 50 and a low voltage detection circuit 51 via a key switch 49. The output of the low voltage detection circuit 51 is connected to the timer circuit 43, and when the power supply voltage of the stabilized power supply circuit 50 falls below a certain value, the timer of the timer circuit 43 is prohibited from starting.

A detailed circuit diagram of each block shown in FIGS. 5 and 4 is shown below.

Next, the operation of this invention configured as described above will be explained. The voltage output from the potentiometer 31 increases or decreases depending on the operation of the accelerator pedal. The throttle opening/closing speed detection circuit 32 detects whether the opening speed and closing speed of the throttle opening detected by the potentiometer 31 are above a certain value. When the throttle opening speed or closing speed is above a certain value, the throttle opening/closing speed detection circuit 32 outputs an H level signal. As a result, the timer circuit 43 is activated and the solenoid drive circuit 44 is driven for a certain period of time. Therefore, the solenoid 46 is energized, the rotary valve 24 is rotated 90 degrees, and the first orifice 22 is rotated 90 degrees.
is closed. This makes the damper function for the engine hard. In this manner, when the throttle opening speed or closing speed exceeds a certain value, the roll stopper is activated to provide a hard damping function to the engine, effectively preventing excessive rolling of the engine.

Next, a description will be given of how the roll stopper is driven when a gear change is performed in the automatic transmission. The gear shift signals A and B output from the electronically controlled automatic transmission are sent to the gear shift presence/absence determination circuit 37, and based on these gear shift signals A and B, the gear changes from "1st gear" to "4th gear". It is determined whether the conversion has been performed. And the gear is "1st gear" ~
When the gear is changed to "4th speed", the gear change presence/absence determination circuit 37 outputs an H level signal.

Here, if the throttle opening detection circuit 33 detects that the throttle opening is above a certain value, or the engine rotation speed determining circuit 35 detects that the engine rotation speed is above a certain value, An H level signal is output from the throttle opening detection circuit 33 or the engine rotation speed determination circuit 35. In this way, when gear change is performed by the automatic transmission and the throttle opening is above a certain value or the engine speed is above a certain value, an H level signal is output from the AND circuit 38 to the timer circuit 43. . Therefore, the solenoid drive circuit 44 is driven for a certain period of time. Therefore, the solenoid 46 is energized and the rotary valve 24 is activated.
Rotated 90 degrees, the first orifice 22 is closed. This makes the damper function for the engine hard.

On the other hand, when the throttle opening is below a certain value and the engine speed is below a certain value, the OR circuit 3
The output of 6 becomes L level. Therefore, even if the automatic transmission changes gears, the output of the AND circuit 38 remains at L level. Therefore, timer circuit 43 does not operate. In other words, even if the electronically controlled automatic transmission changes gears, if the engine speed is below a certain value and the throttle opening is below a certain value (when the engine starts quietly without increasing the engine speed) (in the case of automatic gear shifting), there is less shock during engine gear shifting, so the damper function for the engine is not hardened.

In addition, "R" range position switch 39R
or each time "D" range position switch 39D is turned on or off, the inhibitor switch
An H level signal is output from the ON/OFF determination circuit 39. Therefore, the H level signal is input to the timer circuit 43, and the solenoid drive circuit 44 is driven for a certain period of time. Therefore, the solenoid 46 is energized for a certain period of time, the rotary valve 24 is rotated 90 degrees, and the first orifice 22 is closed.
This makes the damper function for the engine hard. By the way, when the roll stopper is forcibly operated in order to test the roll stopper, the external control switch 40 is turned on. Therefore, the output of the input interface circuit 41 becomes H level, and the signal is transmitted to the timer circuit 43.
is output to. Therefore, the solenoid drive circuit 44 is driven for a certain period of time. Therefore, the solenoid 46 is energized for a certain period of time, and the rotary valve 24 is
degree, and the first orifice 22 is closed. This makes the damper function for the engine hard. Further, as is clear from FIG. 5, when the external control switch 40 is turned on, the output of the chopper circuit 45 is transferred to the input interface circuit 41 and the external control switch 40.
Since it is grounded via the chopper circuit 45, the chopper control performed by the chopper circuit 45 at the falling edge of the timer pulse of the timer circuit 43 is no longer performed. Therefore, when the timer pulse, which is the output of the timer circuit 43, is turned off, the output of the solenoid drive circuit 44 is immediately turned off, and the return spring force of the roll stopper causes the engine to suddenly roll in the opposite direction, thereby regulating the roll of the engine. When it hits the stopper, an impact sound is generated. Therefore, when testing the roll stopper, it is possible to confirm when the roll stopper is not operating. The detailed operation of the chopper circuit 45 will be described later with reference to FIGS. 5 and 6.

By the way, the solenoid 46 generates heat due to frequent driving of the roll stopper. This heat generation accelerates the deterioration of the solenoid and causes smoke to be generated from the solenoid 46. This detection of heat generation in the solenoid 46 utilizes the fact that when the temperature of the solenoid 46 increases, the current flowing through the solenoid 46 decreases. That is, the current flowing through the solenoid 46 is sent to the high temperature detection circuit 48 via the solenoid drive circuit 44, and it is detected whether the current flowing through the solenoid 46 has decreased. This high temperature detection circuit 48 forcibly stops the timer circuit 43 when the current flowing through the solenoid 46 falls below a certain value. As a result, the driving of the solenoid drive circuit 44 is forcibly stopped. As a result, deterioration of the solenoid 46 due to heat generated by the solenoid 46 and generation of smoke from the solenoid 46 can be prevented.

Next, the operation of the chopper circuit 45 will be explained with reference to FIGS. 5 and 6. In FIG. 5, a chopper circuit 45 transmits a sawtooth wave indicated by a in FIG. 6A to a comparator 43 in a timer circuit 43.
It is output to the + terminal of 1. Here, when the timer circuit 43 is turned off, the input voltage at the - terminal of the comparator 431 decreases as shown by curve b.
Therefore, there is a period A in which the sawtooth wave a is smaller than the voltage intermittently. During this period A, the output of the comparator 431 becomes L level. Therefore, during this period A, the solenoid drive circuit 44 is intermittently driven as shown in FIG. 6B. In this way, by providing the chopper circuit 45, the solenoid drive circuit 44 is driven intermittently for a certain period of time even after the timer circuit 43 is turned off. As a result, the solenoid 46 is intermittently excited, the rotary valve 24 is intermittently rotated, and the first orifice 22 is repeatedly opened and closed. Thereby, even if the timer circuit 43 is turned off, it is possible to prevent the engine from suddenly rolling in the opposite direction due to the return spring force of the roll stopper, thereby preventing generation of impact noise caused by hitting the stopper that restricts the roll of the engine. In the above embodiment, the connecting member 5 is connected to the engine 11, and the separating member 21 is connected to the bracket 7 fixed to the vehicle body, but the reverse may be used.

As detailed above, according to this invention, after the current flowing to the solenoid that drives the roll stopper, which prevents the engine from rolling, is turned off, current is intermittently passed through the solenoid, so that the sudden force caused by the return spring force of the roll stopper is reduced. It is possible to provide a roll stopper control device that can prevent the engine from rolling in the opposite direction and reduce the generation of impact noise due to the impact of the stopper.

[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. FIG. 5 is a detailed circuit diagram of FIG. 4, and FIG. 6 is a waveform diagram showing the operation of the roll stopper control device. 33... Throttle opening detection circuit, 34... Rotation speed sensor, 35... Engine rotation speed determination circuit,
37...Gear shift presence determination circuit, 41...Input interface circuit, 43...Timer circuit, 45...
...Chiyotsupa circuit, 46...Solenoid, 48...
High temperature detection circuit.

Claims (1)

[Scope of utility model registration request] An elastic body that is fixed to one side of the engine or the car body and has a liquid chamber formed inside; a separation member that is fixed to the other side of the engine or the car body and partitions the liquid chamber into two; and a separation member that partitions the liquid chamber into two chambers. In a roll stopper that includes orifices that communicate with each other and a valve body that is driven by a solenoid to open and close the orifice, there is a timer circuit that drives a solenoid drive circuit that drives the solenoid for a certain period of time, and an output of the timer circuit that is turned off. 1. A roll stopper control device comprising: a chopper circuit that chopper controls the output of the timer circuit when the timer circuit is turned off, and a solenoid current is intermittently passed through the solenoid after the timer circuit is turned off.