KR910004261Y1 - Vehicle control system - Google Patents

Abstract

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Description

Change control device of vehicle variable speed pulley

1 is a block diagram showing an embodiment of an internal combustion engine vehicle apparatus having a variable speed pulley switching control device according to the present invention;

FIG. 2 is a detailed block diagram showing the configuration of the control device shown in FIG.

3 is a flowchart art of a control program executed in a microcomputer in the control apparatus shown in FIG.

* Explanation of symbols for main parts of the drawings

1: Internal combustion engine vehicle device 2: Internal combustion engine

3: alternator 4: fan

5: compressor 6: oil pump

7: two-speed pulley 13: electronic clutch

51: speed sensor 52: water temperature sensor

55: clutch device 69: control device

70: drive circuit 0: control output

The present invention relates to a switching control device for a variable speed pulley for a vehicle.

In an internal combustion engine vehicle, a variable speed pulley is installed between an auxiliary device and an internal combustion engine in order to efficiently drive auxiliary devices such as an air conditioner and a generator by an internal combustion engine, thereby switching between high speed and low speed of the variable speed pulley. BACKGROUND OF THE INVENTION [0002] A shift system having a configuration that can be performed by turning an electronic clutch on and off has been proposed.

When the variable speed pulley is switched at high or low speeds by turning on or off the electromagnetic clutch, mechanical shock generated at the time of connection of the switching clutch will cause a large mechanical twist on each part of the device. The problem is that the driving feeling is bad.

In order to solve this inconvenience, the present applicant has proposed a control circuit for gradually rotating the compressor by gradually widening the pulse width of the driving pulse applied when the electromagnetic clutch is started in the control circuit of the compressor-driven electromagnetic clutch. (Japanese Patent Publication No. 58-191327)

However, this proposed device is effective for zero electromagnetic clutches, but in the case of an electromagnetic clutch with a gap between the magnetic pole plate and the electromagnet in the disconnected state, this limited device eliminates mechanical impact during connection. It has the drawback that it can't be done.

In other words, as is well known in electromagnets, the suction force increases in inverse proportion to the square of the gap, so that the electronic clutch is instantaneously connected when the pole plate starts to move even if the pulse width of the excitation drive pulse of the electromagnetic clutch is gradually increased. Because it is.

Therefore, according to the prior art, it is impossible to perform switching control of the variable speed pulley without generating a mechanical shock.

It is therefore an object of the present invention to provide a switching control device for a variable speed pulley for a vehicle which makes it possible to switch the variable speed pulley for driving an auxiliary device of an internal combustion engine vehicle irrespective of the type of the electronic clutch.

The structure of the present invention for achieving the above object is an input unit to which the rotational output of an internal combustion engine for a vehicle is input, and an output unit to which at least one auxiliary device to be driven in accordance with the internal combustion engine is connected. And an electronic clutch that operates in response to an electric signal supplied from the outside to switch the speed ratio, the first variable detecting the on / off state of the clutch device provided in the drive system of the vehicle. A detector (2nd detector, a speed sensor, a water temperature sensor, and an acceleration detector) for outputting at least one state data indicating the driving state of the vehicle, and calculating the most suitable switching state of the variable speed pulley based on the state data; In response to this calculation result and the detection result by the first detector, the calculation result only when the above-mentioned clutch device is in the OFF state. Has a signal and outputting a control signal for changing the variable pulley to the most appropriate according to the state transition, and, by this control signal has a characteristic in the point that a shock-free transition of the variable speed pulley.

According to the above-described configuration, the most suitable configuration of the assisting device at that time is calculated from the load state of the assisting device at that time and the necessary data such as the rotational speed of the internal combustion engine, the vehicle speed, etc. The state is determined.

The variable speed pulley can use a well-known configuration including an electronic clutch so that a control signal for controlling the on / off of the electronic clutch is output so that a most suitable shift state in accordance with the calculation result in the calculation means is obtained.

However, this control signal is output only when the first detector detects that the clutch device is in a broken state, so that the variable speed pulley obtains the most suitable speed ratio at that time only when the clutch device is in the broken state. The shifting operation will be performed.

As a result, the variable speed pulley is switched to the most suitable shift state corresponding to the driving state of the vehicle at that time only when the clutch device is disconnected, thus effectively preventing the mechanical impact generated at the time of switching to the vehicle body. I do not offend passengers.

Next, the present invention will be described in detail according to the illustrated embodiment.

Figure 1 shows an embodiment of an internal combustion engine vehicle apparatus provided with a variable speed pulley switching control device according to the present invention.

The internal combustion engine vehicle apparatus 1 includes a semiconductor type alternator 3 driven by the internal combustion engine 2, a fan 4 for cooling water of the internal combustion engine, and an air conditioner compressor 5 And each bogie of the oil pump 6 for power steering, so that the bogie can be operated at an appropriate bogie when the bogie speed of the internal combustion engine 2 changes within a certain range. Between the internal combustion engine 2 and this auxiliary | assistant device, the two-speed transmission pulley 7 which can switch a gear ratio to two steps of high and low is provided.

The two-speed pulley (7) has a small diameter of the first pulley (8) and the cone diameter to each other has a second, third pulley (9), (10) to rotate integrally, such a pulley on the same side It is a bearing.

The first pulley 8 is connected to the output rotation shaft 12 of the internal combustion engine 2 via a one way clutch 11 so that the rotational output from the internal combustion engine 2 is applied to the one clutch 11. It is transmitted to the first pulley 8 through the interposition.

An electromagnetic clutch 13 is provided between the internal combustion engine shaft of the one-clutch 11 and the second pulley 9. When the excitation current of the electromagnetic clutch 13 is supplied, the internal combustion engine 2 and the second pulley 9 are provided. ) Are connected, and the second and third pulleys 9 and 10 are driven directly by the internal combustion engine 2.

The pulleys 14 and 18 are provided in the input shafts 3a, 4a, 5a and 6a of the semiconductor charging generator 3, the fan 4, the compressor 5 and the oil pump 6, respectively. Is fixed as shown in the figure.

The first pulley 8 and the pulley 17 are connected by the drive valve 19, the second pulley 9, the pulleys 16, 18 are connected by the drive valve 20, the third The pulley 10, the pulleys 14 and 15 are connected by the drive valve 21.

When the electromagnetic clutch 13 is in the off state, only the first pulley 8 is directly driven by the internal combustion engine 2 so that the pulley 17 rotates accordingly. Since the pulley 17 and the pulley 16 are fixed to the input rotation shaft 5a, the rotation of the pulley 17 is transmitted to the pulley 18 and the second pulley 9 according to the drive belt 20, and further driven. It is transmitted to the pulleys 14 and 15 by the belt 21.

Since the sizes of the pulleys 16 and 17 are set to the same size as the diameter of the second pulley 9, the rotation speed of the second pulley 9 is the rotation speed of the first pulley 8, that is, the internal combustion. It is smaller than the rotational speed of the engine 2.

On the other hand, when the electromagnetic clutch 13 is turned on, the second and third pulleys 9 and 10 are driven directly according to the engine 2 so that they rotate at the same speed as the rotational speed of the internal combustion engine 2. do.

As a result, the semiconductor charging generator 3, the fan 4, the compressor 5 and the oil pump 6 are driven at a high rotational speed when the electromagnetic clutch 13 is in the on state, and the electromagnetic clutch 13 If is off, it is operated at low speed.

Furthermore, when the electromagnetic clutch 13 is turned on, the first pulley 8 is driven by the pulley 17 and the drive valve 19 at a higher speed than the drive speed by the internal combustion engine 2, but the first pulley Since the 8 and the internal combustion engine 2 are connected via the one clutch 11, the one clutch 11 will be in a slippery state, and unsuitable work will not occur.

Since the operating state of the internal combustion engine 2 and each auxiliary device is detected, the present apparatus 1 has a speed sensor 51 for detecting the rotational speed of the internal combustion engine 2 and a water temperature for detecting the cooling water temperature of the internal combustion engine 2. On to detect on and off states of the magnetic clutch (not shown) of the field current sensor 53 and the compressor 5 to detect the field current value of the sensor 52, the semiconductor charging generator 3, and the compressor 5 The on / off detector 54 is provided.

From the speed sensor 51, the water temperature sensor 52, and the field current sensor 53, a speed signal S indicating the speed of the internal combustion engine 2 and a water temperature signal S ₂ indicating the cooling water temperature of the internal combustion engine 2 are provided. ) And the field signal S ₃ indicating the magnitude of the field current are respectively output, and the respective signals S ₁ (S ₂ ) and (S ₃ ) are input to the control unit C / U 69.

The on / off detector 54 outputs a signal S ₄ whose level is "H" or "L" in response to the on / off of the electronic clutch in the compressor 5, and is input to the control unit 69. have.

Moreover, numeral 61 is an acceleration detector which then outputs the accelerator opening degree signal (開度信號) (S ₅₎ representing the accelerator opening degree (開度) at that time in accordance with the operation amount of the accelerator pedal 62, the accelerator opening degree signal (S ₅ ) is also input to the control unit 69.

The internal combustion engine 2 is also connected to the propeller shaft 58 connected to the drive wheels 57 and 57 via the clutch device 55 and the transmission 56, whereby the drive system of the vehicle is connected. Consists of.

The clutch device 55 includes a first detector 59 for detecting whether the clutch device 55 is in an on or off state, and a first detector 59 for detecting whether the clutch device 55 is in an on or off state. On the other hand, the transmission 56 is provided with a second detector 60 for detecting the shift position at that time of the transmission 56.

The first detection signal DS ₁ indicating the on / off state of the clutch device 55 output from the first detector 59 and the shift at that time of the transmission device 56 output from the second detector 60. The second detection signals DS ₂ indicating the state are input to the control unit 69, respectively.

The control unit 69 responds to these signals in accordance with the driving state of the vehicle at that time, that is, the driving state of each auxiliary device, the vehicle speed state, the engine driving state, and the like. By calculating the switching state, when the clutch device 55 is in the disconnected state (off state), the control output 0 according to the calculation result is output.

The control output 9 is input to the drive circuit 70, and the drive circuit 70 controls the energization of the excitation current 1 supplied to the electromagnetic clutch 13 in response to the control output 0, Accordingly, the control of the two-speed pulley 7 is performed.

2 shows a block diagram of an example of the configuration of the control unit 69 when the control unit 69 is constructed using a microcomputer.

The speed signal S ₁ is converted into the speed voltage signal V _S by the conversion circuit 101 and converted into digital data by the corresponding A / D converter 102, and then as the first data D ₁ . It is input to the microcomputer 103.

The other output signals S ₂ , S ₃ , and S ₅ are converted into digital data according to the A / D converters 104, 105, and 107, respectively, to thereby convert the A / D converters 104, 105. Are output to the microcomputer 103 as the second data D ₂ , the third data D ₃ , and the fourth data D ₄ .

The first and second detection signals DS ₁ , DS ₂ , and signal S ₄ are input to the microcomputer 103 as they are.

In the memory 106, a control program for switching control of the two-speed pulley 7 is stored. Each data input to the microcomputer 103 is processed in accordance with this control program.

Referring to FIG. 3, the flowchart art of the control program stored in the memory 106 is described. First, in step A, the program is initialized and each data is read. Then, whether the engine speed N is zero or not is determined. Only when it is made (step B) that N ≠ 0, the process advances to step C to determine whether the acceleration opening degree AC is zero or not.

In the case of AC = 0, the flow advances to step D where it is determined whether or not the vehicle speed V is zero.

When the determination result in step D is yes, that is, when the engine speed is not 0, the acceleration opening degree is 0, and the vehicle speed is 0 (for example, in the idle driving state), the electromagnetic clutch 13 Is turned on. As a result, in the idle operation state, the two-speed pulley 7 is switched to the high speed state (the state where the reduction ratio becomes small) (step E) and returns to step B. FIG.

On the other hand, if the determination result of step D is NO or the determination result of step C is NO due to a reason such as an engine brake is applied, the clutch device ( It is judged whether or not 55) is OFF.

When the clutch device 55 is not OFF, that is, when the rotational output of the internal combustion engine 2 is transmitted to the transmission 56, the determination result of step F becomes NO. Return to step B).

If the result of the determination in step F is yes, the shift operation in the transmission 56 is in the direction of reducing the speed ratio. The condition is judged whether or not it is switched to reduce the reduction ratio of.

If the necessary switching conditions are satisfied, the flow advances to step K, and the electromagnetic clutch 13 is turned ON to complete the switching of the two-speed pulley 7.

In addition, when the switching conditions required for the respective steps (H) and (J) cannot be satisfied, both steps return to step (B) to operate the electromagnetic clutch 13, that is, the two-speed pulley 7. You will not be able to switch.

According to this configuration, the vehicle speed V, the acceleration opening degree AC and the overspeed N are given priority to check whether the vehicle is in the idle driving state (steps B, C, and D). When it is determined that the vehicle is in the operating state, the electromagnetic clutch 13 is turned on in accordance with the control output 0.

When the vehicle is in a state other than the idle driving state, it is judged whether the clutch device 55 is OFF or not (step F). When the clutch device 55 is in a disconnected state, the two-speed pulley 7 The two-speed pulley 7 can be switched only when the switching condition is satisfied. In this way, the changeover of the two-speed pulley 7 is a configuration that can be performed when the clutch device 55 is in a disconnected state. Therefore, the shock generated by the switching of the two-speed pulley 7 is not transmitted to the driving system of the vehicle, and thus, of course, the driver and passenger are not uncomfortable due to the shock. It can prevent the bad influence on lifespan.

Furthermore, the electromagnetic clutch 13 is instantaneously connected, and the life of the electromagnetic clutch 13 is reduced compared with the conventional apparatus which makes the electronic clutch 13 slip when connected and thus reduces the impact of switching. Can extend significantly.

In the above embodiment, an example in which a two-speed pulley is used as the variable speed pulley has been described, but the present invention is not limited to the switching control of the two-speed pulley shown in this embodiment.

According to the present invention, as described above, even if the rotational output of the internal combustion engine is not transmitted to the drive wheel, even if the variable speed pulley provided between the internal combustion engine and the auxiliary device can be switched, the impact is not transmitted directly to the vehicle body. Therefore, shortening of the life of each member due to the impact can be prevented, and unpleasantness to the passenger can be prevented.

In addition, since the electronic clutch used for shifting the variable speed pulley does not need to be used in a slippery state at the time of connection, the life of the electronic clutch can be significantly extended, and the above-described effects can be obtained regardless of the type of the electronic clutch.

Claims (1)

It operates in response to an input unit to which the rotational output of the vehicle internal combustion engine 2 is input, an output unit to which at least one auxiliary device to be driven by the internal combustion engine 2 is connected, and an electric signal provided from the outside, At least one indicating a driving state of a vehicle and a first detector for detecting an on / off state of a clutch device 55 provided in a drive system of a vehicle in the switching control apparatus for a variable speed pulley for a vehicle provided with an electromagnetic clutch 13 for switching. The most suitable switching state of the variable speed pulley 7 is calculated on the basis of the second detector 60, the speed sensor 51, the water temperature sensor 52 and the acceleration detector 61 outputting the The control system for switching the variable speed pulley 7 to the most suitable switching state according to the calculation result only when the clutch device 55 is in the off state in response to the calculation result and the detection result by the first detector 50. And a control unit 69 for outputting a call.