JPH0311123A - Electromagnetic valve controller for engine - Google Patents

Abstract

PURPOSE:To improve the acceleration performance by opening/closing-operating two suction valves and two exhaust valves in correspondence with the signal value over a prescribed value of the difference after the lapse of a prescribed time of the engine torque by a solenoid valve driving device. CONSTITUTION:A controller 15 allows electric current to flow in the stator coil 20 and the movable coil 24 of an electromagnetic valve driving device in correspondence with each detection signal, and energizes an electromagnet and drives suction valves 1 and 2 and exhaust valves 10 and 11. When the difference between the torque detection signal value of an engine 20 at a prescribed time which is detected by a load sensor 30 and the torque detection signal value after the lapse of a prescribed time is over a previously set prescribed value, all the suction valves 1 and 2 and the exhaust valves 10 and 11 are opening/closing-operated. Therefore, in the acceleration mode in which the operation state of the engine 20 is over a prescribed value, acceleration performance can be accelerated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic valve control device for an engine that opens and closes intake and exhaust valves using electromagnetic force.

(Prior art) Conventionally, as a multi-intake/exhaust valve type engine, for example, the
There is one disclosed in Publication No. 3-35807. The multiple intake/exhaust valve type engine has dual intake/exhaust boats, intake/exhaust pipes, and intake/exhaust valves.For example, a multiple intake/exhaust valve engine has two intake valves and two exhaust valves, and each It has each intake boat in which an intake valve is disposed, and each exhaust port in which each exhaust valve is disposed. Each intake boat is connected to a respective intake passage, and each intake ill passage is branched from a collecting pipe of the intake manifold. Further, each exhaust port is connected to each exhaust passage, and each exhaust passage is communicated with a collecting pipe of the exhaust manifold.

By the way, the opening and closing operations of engine intake and exhaust valves have been driven by mechanical valve mechanisms such as camshafts for a long time, but instead of this mechanical valve mechanism, the suction force of solenoid etc. is used. A proposal to operate the valve using an electric mechanism is
For example, JP-A-58-183305, JP-A-61
It is disclosed in Japanese Patent No.-76713.

[Problem to be solved by the invention]

However, the multi-exhaust valve type engine disclosed in the above-mentioned Japanese Patent Publication No. 63-35807 connects each intake passage with a bypass passage, and arranges a control valve in the bypass passage, and controls the intake flow rate by opening and closing the control valve. It is what controls the. Therefore, the intake air branches and expands in the bypass passage that connects the intake passage, the flow velocity slows down and the swirl cannot be controlled, and even if there is inertia, it passes through the bypass passage, causing boat resistance and a change in flow direction. However, turbulence and restriction occur, and when the air enters the cylinder of the engine, it is sucked in at a reduced flow rate, resulting in large losses and making it difficult to control the intake air.

By the way, the biggest feature of a multi-exhaust valve type engine, that is, a four-valve type engine, is that the engine has good revving properties.When both intake valves are fully opened, the intake air flows into the cylinder at once, reducing the cylinder internal pressure. to rise suddenly,
One cycle of intake air can be quickly exchanged. In particular, in the acceleration mode of the engine, the engine revs up from a low speed and operates at the maximum torque value at high speed and high load, successively. On the other hand, when the air flow rate through the intake boat is high, inertia supercharging is possible due to inertia force, but when the air flow is low, such as at low speeds, the effect of inertia supercharging is small. The disadvantage of this formula is that at low speeds, the intake passage area is too large and one of the intake valves cannot be closed. Therefore, focusing on the fact that closing one intake valve increases the inertia effect, a major challenge is to construct a system that can freely control the valves so that one intake valve can be closed.

In addition, in the proposals for using an electromagnetic mechanism to operate the intake and exhaust valves disclosed in the above-mentioned publications, the timing of opening and closing the valves is controlled electrically, but the opening and closing of the valves cannot be controlled according to the load and rotation of the engine. This is not taken into account and has the problem of increasing losses.

The purpose of this invention is to solve the above problems,
Focusing on the fact that the intake and exhaust valves can be controlled independently of the rotation of the crankshaft by opening and closing them using electromagnetic force using a TM valve drive device, we applied a cough electromagnetic pulp drive device to a four-valve engine to control the engine load. The system detects the difference in engine torque for a predetermined period from the engine speed and rotation, and in response to an acceleration mode in which the torque difference is larger than a predetermined value, opens and closes all intake and exhaust valves, and controls the engine torque from low speed to high speed and high speed. The system aims to promote acceleration by adapting to the operating state in acceleration mode, where the operating state is continuous at the maximum torque value under load, and furthermore, in the steady engine operating state, the opening and closing operations of each intake and exhaust valve are adjusted to the engine rotational speed. At low speeds and low engine speeds, one intake valve is kept closed, supercharging is performed by inertia effect, and the other intake valve is opened/closed to allow air flow from the intake valve to the cylinder. To provide an electromagnetic valve control device for an engine that efficiently sends intake air into a cylinder, and also opens and closes both intake valves at high speeds and high loads to send intake air to a cylinder.

[Means to solve the problem]

In order to achieve the above object, the present invention is configured as follows. That is, the present invention provides an electromagnetic valve control device for opening and closing two intake and exhaust valves by electromagnetic force, which includes a detection means for detecting engine torque, and a torque detection signal value detected by the detection means at a predetermined time. An electromagnetic valve control device for an engine, comprising: a controller that controls opening and closing of each of the intake and exhaust valves in response to a signal value whose torque difference with a torque detection signal value after a predetermined period of time is greater than or equal to a preset predetermined value; Regarding.

Further, in this engine IHff valve control device, the controller responds to a signal value in which the torque detection signal value and a rotation detection signal value from a detection means for detecting engine rotation are equal to or less than each preset value. opening and closing one of the intake valves and keeping the other in a closed state;
Further, in response to each side-out signal value being equal to or greater than the set value, both of the intake valves are controlled to open and close.

[Effect]

This invention is constructed as described above and operates as follows. In other words, this engine! Magnetic valve control flll device is
In response to a torque difference signal value in which the difference between the torque detection signal value at a predetermined time detected by the detection means for detecting engine torque and the torque detection signal value after a predetermined period of time is greater than or equal to a preset predetermined value, Since the configuration is configured to open and close the valves, etc., in the acceleration mode of the engine above a predetermined value, both intake valves are fully opened to send intake air into the cylinder at once, and the intake air in one cycle can be exchanged quickly. It is possible to improve the acceleration of the engine by making it possible to correspond to the continuous operation state of revving up from low speed and the maximum torque value at high speed and high load. In this case, the level of engine torque is detected by the fuel flow rate with respect to the position of the accelerator pedal, and when the level is a large difference, in other words, when the accelerator pedal depression speed is high, it is assumed that the mode is a high acceleration mode. It controls the opening and closing of all intake and exhaust valves based on commands from the controller.

Further, in response to a signal value in which the torque detection signal value and the rotation detection signal value from the detection means for detecting engine rotation are equal to or less than respective preset values, one of the intake valves is opened/closed, and the other is kept closed. In addition, both of the intake valves were opened and closed in response to signal values greater than or equal to each set value, so even when the engine was running at low speed, the intake air flowed at high speed through the intake passage, maintaining its inertial force. Since the intake air flows into the cylinder through the intake passage of the open intake valve that operates, the intake air flows more efficiently than in conventional intake systems. Further, when the engine is running at high speed and under high load, intake air can be sent into the cylinder at once through both intake valves, and an amount of intake air can be sucked into the cylinder in response to the operating conditions.

However, there are two intake and exhaust valves! Since the valve can be operated by magnetic force to open and close, it is possible to control the valve operation independently of the crank angle, compared to a conventional control 2B valve using a mechanical valve mechanism such as a camshaft. Therefore, as described above, control can be performed in response to engine torque, engine rotation, engine load, and intake air amount, and control can be performed to improve the inflow efficiency of intake air.

〔Example〕

Hereinafter, with reference to the drawings, the iu of the engine according to the present invention will be explained.
An embodiment of the i-valve control device will be described.

In FIG. 1, a cylinder and an intake/exhaust boat for incorporating an electromagnetic valve control device for an engine according to the present invention are shown. The cylinder head 3 of this cylinder has
For example, 4 valves can be installed for intake and exhaust valves.
Two boats are formed. Two of the four boats are intake ports 4°5, and the other two are exhaust ports 8.
．． It is 9. An intake valve 1 is arranged on the intake boat 4, and an intake valve 2 is arranged on the intake boat 5. Further, the intake boat 4 is connected to the intake illumination passage 6, and the intake boat 5 is connected to the intake passage 7.

That is, these intake passages 6.7 are formed independently and separated from each other from the intake manifold, and are connected to the cylinder head 3.
It is connected to intake boats 4 and 5 formed in Furthermore, an exhaust valve IO is arranged at the exhaust port 8, and an exhaust valve 11 is arranged at the exhaust port 9. Further, the exhaust port 8 is connected to an exhaust passage 12, and the exhaust port 9 is connected to an exhaust passage 13. That is, these exhaust passages 12,13 communicate with the collecting pipe of the exhaust manifold.

Next, an example of a magnetic valve drive device 1 into which this engine electromagnetic valve control device can be incorporated will be described with reference to FIG. As shown in FIG. 4, this electromagnetic valve drive device is built into the engine 20, and the main parts of the electromagnetic valve drive device are conceptually shown with the main parts removed from the engine 20. The second fuel injection device that controls the fuel supplied to the engine 20 is the injection nozzle 31.
The injection nozzle 31 penetrates into the intake port 4.5 from the upper part of the cylinder head 3, and the fuel injected from the nozzle hole is introduced into the cylinder.

The fuel injection device 21 is controlled by a command from the controller 15 to inject a predetermined amount of fuel. Further, a rotation sensor 14 of the engine 20 is provided to the output shaft of the engine 20 to detect the engine rotation speed. Detection of this engine speed (l [i.e., rotation number) is input to the controller 15. The intake valves I and 2 are made of ceramic material and are guided up and down by a valve guide 16 fixed to the cylinder head 3. Although only the intake valve 1.2 is shown in the figure, it is an electromagnetic valve drive device that can incorporate the electromagnetic valve control device of the engine with four valves. Similarly, each exhaust valve is driven by tfff.In this exhaust system, the exhaust passage 12.13 is not provided with a fuel injection nozzle or a flow rate sensor.

Intake valve 1 by raising or lowering intake valves 1 and 2
．． The intake ports 4 and 5 are opened and closed when the valve face I7 of the cylinder head 3 contacts or separates from the valve seat 18 installed in the 9-air boat 4.5 of the cylinder head 3. Therefore, the amount of intake air into the cylinders of the engine 20 is controlled by the opening/closing operation or amount of opening/closing of these intake ports 4, 5. Intake valve 1
．． A movable element] 9 made of a magnetic material such as soft iron is fixed to the upper end 23 of the movable element 19, and a movable element coil 24 is provided on the movable element 19. Further, a stator 25 made of an n-type material such as soft iron is installed above the mover 19 in the cylinder head 3, and a stator coil 22 is installed in the stator 25. Therefore, the movable coil 24 and the stator coil 22 are energized/
By being cut off, the stator 25 attracts/removes the movable element 19, thereby driving the intake valves 1 and 2 up and down. Note that a valve spring 26 is disposed between a valve spring seat formed on the upper surface of the cylinder head 3 and the movable element 19. Therefore, the intake valve 1.2 is normally closed by the spring force of the valve spring 26.

Furthermore, regarding intake and exhaust valves that are operated by electromagnetic force, the material that constitutes the intake and exhaust valves themselves is made of ceramic material to reduce weight, and the sliding parts of the valve face 17 and valve stem of the intake and exhaust valves are It is preferable that the valve face 17 be made of a non-magnetic ceramic material in order to prevent iron powder etc. from adhering to the valve face 17.
If iron powder or the like is adsorbed to the sliding part of the valve stem, the airtightness of the intake and exhaust ports by the intake and exhaust valves will deteriorate.
Furthermore, the frictional af resistance of the sliding portion increases, causing undesirable conditions such as seizure. Therefore, in order to operate the intake and exhaust valves by electromagnetic force, a mover 19 made of a magnetic material is separately provided at the upper end of the intake and exhaust valves. By configuring the intake and exhaust valves as described above, when the controlled current from the controller 15 is energized or cut off to the mover coil 24 and the stator coil 22, the stator 25 moves the mover 19 to the spring 26. Separation or suction can be performed against the biasing force, so that the intake valve 1.2 can be lowered or raised, and the valve face of the intake valve 12 can open or close the intake boats 4, 5. .

Is this engine's electromagnetic valve system? 11 [The valve drive device is provided with an engine load sensor 30 to detect the load of the engine 20. This engine load sensor 30 detects the engine load, and in this embodiment, detects the amount of fuel supplied to the engine 20 from the injection nozzle 31 of the fuel injection device 21, or detects the amount of fuel supplied to the engine 20 from the injection nozzle 31 of the fuel injection device 21, or
This can be detected by detecting the amount of depression. In other words, the engine load sensor 30 can be configured with a detection sensor that detects the amount of fuel supplied to the engine 20 and/or a detection sensor that detects the amount of depression of the accelerator pedal 28.

Therefore, by inputting a signal of the amount of fuel supplied to the engine 20 and/or the amount of depression of the accelerator pedal 28 to the controller 15 as an engine load signal, the tM1 valve of the intake and exhaust valves can be controlled. That is, in response to the load signal input to the controller 15,
! The valve can be driven by flowing a t-current through the stator coil 22 and movable coil 24 in the magnetic valve driving device to excite the electromagnet.

A flow rate sensor 29 is provided in the intake passages 6 and 7. This flow rate sensor 29 detects, for example, the air flow hitting a heating wire through which an electric current is passed, by a change in the resistance value of the heating wire, and the signal from the flow rate sensor 29 is inputted to the intake flow rate processing device of the controller 15. The amount of intake air passing through the intake passage 6.7 can be detected.

The controller 15 consists of a microcomputer,
It is equipped with a central control unit that performs arithmetic processing, various memories that store arithmetic processing procedures, control means, etc., input/output boards, etc., and one for each of the aforementioned various sensors, etc. When the signal is input, processing is performed according to the procedure stored in the memory, and the intake valve 1. Control commands are issued to the electromagnetic coils 22.24 for the valve mechanism for opening and closing the intake and exhaust valves 10.2 and 10.11, thereby controlling the opening and closing operations of the intake and exhaust valves.

Further, the controller 15 is configured to calculate not only the opening/closing operation of the intake and exhaust valves but also the valve opening degree, valve lift, fuel injection timing, etc., and to issue control commands. In addition, in the figure, 27 is a battery,
It serves as @B for the controller 15, various coils for valve trains, etc.

Next, an electromagnetic valve drive device into which the engine electromagnetic valve control +U device according to the present invention can be incorporated is constructed as described above, and this 'r! An example of the operation of the 1itt valve control device will be described with reference to FIGS. 2 and 3(A) and 3(B).

Figure 2 shows intake and exhaust valves 1, 2, and 1 in an electromagnetic valve drive device that can incorporate this electromagnetic valve control device.
FIG. 3 is a drive region diagram showing a drive state of 0.11. Further, FIGS. 3(A) and 3(B) are process flow diagrams showing an example of the operation of an electromagnetic valve drive device into which this tm valve control device can be incorporated.

The electromagnetic valve control device for an engine according to the present invention includes, for example, two intake valves 1.2 and two exhaust valves 10.
11! It is opened and closed by magnetic force, and the engine 2
Detection means for detecting the zero rotation, that is, the rotation sensor 14, a load sensor 30 for detecting the load state of the engine, that is, a depression amount sensor for detecting the amount of depression of the accelerator pedal 28, and/or a detection means for detecting the rotation of the accelerator pedal 28 from the injection nozzle 31 of the fuel injection device 21 into the cylinder. and a fuel supply amount sensor that detects the amount of fuel injected into the fuel tank. Engine 20 rotation sensor 1
4, or in response to a negative rfIi* output signal of the engine load from the depression amount sensor and/or fuel supply amount sensor, and in response to a command from the controller 15, both suction Exhaust valves 1, 2, 10.11 are opened and closed, or one intake valve 1 is kept closed and the other intake valve 2 is kept closed.
This controls the opening and closing of the valve. Furthermore, this electromagnetic valve control J7j equipment opens and closes both the intake valves 1 and 2 by the fuel supply device 21 in response to an intake air flow rate signal in which the intake air flow rate flowing through each intake passage 6.7 is equal to or higher than a predetermined value. The intake valve I or 2 is operated to maintain one intake valve I or 2 in a closed state in response to an intake air 2 it amount signal that is less than or equal to a predetermined value.

First, by driving the engine 20, the intake and exhaust valves 1, 2, 10, and 11 are driven by the 1-magnetic valve drive device. These intake and exhaust valves l, 2, 10.11
In order to optimally open and close the engine 20 according to the operating state of the engine 20, the first step is to detect the engine torque and determine whether the engine is in an acceleration mode.

For detecting the engine torque, a load sensor 30
This is achieved by a fuel flow rate detection sensor that detects the amount of depression of the accelerator pedal 28.

That is, the detection signal value of the fuel flow rate corresponding to the position of the accelerator pedal 28 at a predetermined time such as when starting the engine or when the vehicle is mounted is detected as a torque detection signal (altl), and the torque detection signal value L□ is sent to the controller 15. is input and stored in the memory device of the controller 15 (step 40).Next, after a preset minute time has elapsed, that is, after a predetermined period of time has elapsed (step 41), the detected signal value of the fuel flow rate with respect to the position of the accelerator pedal 28 is input. The torque detection signal value Ltg is detected as a torque detection signal value Ltg, and the torque detection signal value L0 is output to the controller 15.
(step 42).

Next, the comparator of the controller 15 calculates the difference Δ between the torque detection signal value tt and the torque detection signal value 1.
L1 (ΔLt-L.-L, 1) is a predetermined torque difference signal value ΔL, which is set in advance. Determine whether it is larger than (step 43), that is, Lo LE+"ΔL!>
ΔL [・ Difference ΔL between torque detection signal values during a predetermined period.

is larger than the predetermined torque difference signal value ΔLto, the engine 20 is in a large acceleration mode, that is, during acceleration (second
In order to accelerate the acceleration of the engine 20, all valves, including the two intake valves 1.2 and the two exhaust valves 10.11, are opened and closed. , and in order to increase the intake flow rate by maximizing the valve lift of the intake valves 1 and 2, and to increase the cylinder internal pressure at once to promote combustion, the following process is performed. The driving conditions of each valve driving system of the electromagnetic valve driving device for the intake valve 1.2 and the exhaust valve 10.11 are checked (step 44). If there is no abnormality after checking the drive conditions of each valve drive system of the electromagnetic valve drive device,
All valves are opened and closed under conditions in which the valve timing, valve opening time, and valve lift) l of the intake valve 1.2 and the exhaust valve 10.11 are set in advance. That is,
By the command of the controller 15, both intake valves 1
．． 2 and each stator coil 20 and each mover coil 2 in each valve lifter of both exhaust valves 10.11.
ti is supplied to the engine 20 to control each valve to open and close (step 45).Then, it is determined whether or not to continue driving the engine 20.Step 46
), if the engine 20 continues to be driven, the process returns to the first step 40, and if the engine 20 is to be stopped, the operation control of the electromagnetic valve drive device ends.

Further, in step 43, the difference ΔLt between the torque detection signal values in a predetermined period is determined to be a predetermined torque difference signal value ΔL□
. If it is smaller than , the engine 20 is not in a large acceleration mode, so there is no need to promote the acceleration of the engine 20, and the intake and exhaust valves 1°2.10.11 are adjusted in a steady state according to the operating state of the engine 20. Therefore, in order to control the engine 20 in the operating states C and D shown in FIG. 2 and in the operating state along the solid line, the following process is performed. Sometimes, as shown in operating region C in FIG.
At high speeds and high loads, both intake valves 1 are closed in order to increase the intake flow rate, as shown in the operating region of
．． Controls two consecutive operations that perform two opening and closing operations.

First, the rotation speed N of the engine 20 is detected by the rotation sensor 14, and the rotation output signal is inputted to the controller 15. In the above, the depression amount detection signal detected by the accelerator pedal depression amount detection sensor on the second day is inputted to the controller 15 as the load signal LEffi of the engine 20.

Alternatively, the fuel supply amount injected from the injection nozzle 31 of the fuel supply device 21 is the fuel supply! The detected fuel supply amount signal is detected by the side discharge sensor, and the detected fuel supply amount signal is also output to the engine 2.
It may be input to the controller 15 as a zero load signal. Furthermore, a flow rate sensor 2 installed in the intake passage 6 and 7
The intake flow rate detection signal from 9 is input to the intake flow rate processing device of the controller 15, and the intake flow rate 1c passing through the intake passage 6.7 is inputted to the intake flow rate processing device of the controller 15.
m is detected respectively (step 47).

The engine rotation speed N detected by the rotation sensor 14 of the engine 20 is a predetermined rotation speed N, which is calculated in advance.

(step 48). In this case, the predetermined rotational speed NE is a value that changes along the straight line A depending on the load of the engine 20, as shown in FIG. It is.

The engine rotation speed N is a predetermined rotation speed N. If the engine load Ltt detected by the engine load sensor 30 is greater than the predetermined engine load calculated in advance, as described above. Determine whether it is greater than (
Step 49), in this case a predetermined load. is the second
As shown in the figure, the rotational speed N of the engine 20. It is a value that changes along the straight line B depending on. Engine load LEt
is a given engine load. If it is larger, the flow rate sensor 29 detects the amount of intake air in the intake passage 6.7 of the engine. The detection signal from the flow rate sensor 29 is input to the intake flow rate processing device of the controller 15 and processed. In the controller 15, the intake passage 6
, 7 is larger than a predetermined intake air amount CH7° calculated in advance (step 50).

The engine speed is a preset rotational speed N. bigger,
Engine load is preset load L□. If the amount of intake air I Cs t in the intake passage 6.7 is larger than the predetermined intake air amount C1° calculated in advance, the operating state of the engine 20 is a high speed and high load state. Therefore, since it is preferable to open and close both intake valves 1.2, check the driving conditions of each valve drive system of the electromagnetic valve drive device of both intake valves 1.2 (step 51), 1! If there is no abnormality after checking the drive conditions of each valve drive system of the magnetic valve drive device,
The two intake valves 1.2 are opened and closed under conditions in which the valve timing, valve opening time, and valve lift (I) of the intake valves 1.2 are set in advance.

That is, according to a command from the controller 15, current is supplied to each stator coil 20 and each movable coil 24 in each valve lifter of both intake valves 1.2, and each valve is actuated to open and close. Control is performed (step 52). Next, it is determined whether or not to continue driving the engine 20 (step 53). If the engine 20 is to be continued to be driven, the process returns to the first step 40 to control the engine 20. When the drive of the electromagnetic valve drive device 20 is stopped, the operation control of the electromagnetic valve drive device ends.

In step 48, if the engine speed N is smaller than the predetermined speed N0, the operating state of the engine 20 is low, so the intake air flows at high speed through one of the intake passages 6. In order to maintain the inertial force through the intake boat 4 and cause the intake to flow into the cylinder, a signal representing the engine rotational speed N is input to the controller 15, and the process proceeds to the next step (step 54).

Further, in step 49, the engine load Ltx is set to a predetermined engine load. , the operating state of the engine 20 is low load, so the intake air flows at high speed through one intake passage 6, and the intake boat 4 of the intake passage 6 is
In order to maintain the inertial force of the flow velocity and flow into the cylinder, the signal of the engine load LEl is input to the controller 15, and the process proceeds to the next step (step 54).

Furthermore, in step 50, the amount of intake air C0 in the intake passage 6.7 is equal to the calculated predetermined amount of intake air C10.
If it is smaller, the intake flow rate is small and it is sufficient to open and close one intake valve l, so the intake air flows at high speed through one intake passage 6 and the inertia of the flow rate is maintained through the intake boat 4. To make it flow into the cylinder,
The intake air IC, It signal is input to the controller 15 and the process proceeds to the next step (step 54).

In step 54, based on the above detection signals input to the controller 15, the driving conditions of the valve drive system of the 1itN valve drive device of the intake valve 1 are checked in order to open and close the intake valve 1 according to commands from the controller 15. (Step 54),': If there is no abnormality in the drive conditions of the valve drive system of the X magnetic valve drive device, the valve timing, valve opening time, and valve lift amount of intake valve 1 are set under the preset conditions. Then, the intake valve 1 is opened and closed, the intake valve 2 is held in the closed state, and the valve is controlled to perform single operation.

That is, in response to a command from the controller 15, current is supplied to the stator coil 22 and movable coil 24 in the valve lifter of the intake valve 1, and the valve is controlled to operate to open and close (step 55). ), then it is determined whether or not to continue driving the engine 20 (step 56), and if the engine 20 is to be continued to be driven, the process returns to the first step 40 to control and stop driving the engine 20. In this case, the operational control of the tVA pulp drive is terminated.

An example of the drive range of the intake valves 1 and 2 is shown in FIG. That is, the pre-calculated engine speed N,
. , and the pre-calculated predetermined engine load Lto,
It is a variable that changes along a straight line depending on the engine speed and engine load.

In the figure, the operating region C is a double drive region in which two intake valves 1 and 2 are driven, and the operating region C is a double drive region in which one intake valve 1 is kept closed and only the other intake valve 2 is driven. Single operating area.

〔Effect of the invention〕

The electromagnetic valve control device for an engine according to the present invention is configured as described above, and has the following effects. That is, the present invention provides an electromagnetic valve control device that opens and closes two intake and exhaust valves using a 7:i61 force, which includes a detection means for detecting engine torque, and a torque detection signal detected by the detection means at a predetermined time. The controller includes a controller that controls opening and closing of each of the intake and exhaust valves in response to a signal value in which the torque difference between the torque detection signal value and the torque detection signal value after a predetermined period of time is greater than or equal to a preset predetermined value. In acceleration mode when the operating state is above a predetermined value, intake air can be sent into the cylinder at once by fully opening both of the intake valves, reducing friction run in the intake 1ffi path and quickly exchanging the intake air in the 1 cycle, thereby increasing the speed at low speeds. It is possible to cope with continuous operating conditions in which the engine is revved up from the engine and the torque is at its maximum value at high speed and high load, thereby promoting acceleration of the engine. In this case, the engine torque level is detected by the fuel flow rate with respect to the position of the accelerator pedal, and when the level is a large difference, it is assumed that the engine is in a large acceleration mode, which is the operating state along the solid line in FIG. It is controlled by commands from the controller to open and close all exhaust valves.

Further, in response to a signal value in which the torque detection signal value and the rotation detection signal value from the detection means for detecting engine rotation are equal to or less than respective preset values, one of the intake valves is opened/closed, and the other is kept closed. In addition, since both of the intake valves were opened and closed in response to signal values greater than or equal to each set value, even when the engine is at low speed and load, the intake air can absorb the inertia of the air flowing at high speed through the intake passage. The intake air is supercharged by the inertia effect and flows into the cylinder through the intake passage of the open intake valve that operates the valve. Further, when the engine is running at high speed and under high load, intake air can be sent into the cylinder through both intake valves at once, and an amount of intake air can be drawn in that corresponds to the operating condition.

[Brief explanation of the drawing]

Figure 1 shows 1 of the engine according to this invention! FIG. 2 is a schematic diagram showing the relationship between intake and exhaust valves into which the magnetic valve control device can be incorporated; FIG. Figure 3 (A) and Figure 3 (B)
can incorporate this electromagnetic valve control device.
A process flow diagram showing an example of the operation of the pulp drive device and FIG. 1j
FIG. 2 is an explanatory diagram showing an example of an electromagnetic valve drive device in which the device can be incorporated. l, 2--Intake valve, 3-Cylinder head, 4, 5--Intake boat, 6. 7--Intake passage, 89--exhaust boat, 10, 11--exhaust valve, 12.13--exhaust passage, 14--engine rotation sensor, 15--controller, 20-
・・・・・−Engine, 28−・・−Accelerator pedal, 3
0・---111 load sensor

Claims (2)

[Claims] (1) In an electromagnetic valve control device that opens and closes two intake and exhaust valves using electromagnetic force, there is a detection means for detecting engine torque, a torque detection signal value detected by the detection means at a predetermined time, and a predetermined period of time elapsed. An electromagnetic valve control device for an engine, comprising: a controller that controls opening and closing of each of the intake and exhaust valves in response to a signal value whose torque difference with a subsequent torque detection signal value is equal to or greater than a predetermined value set in advance. (2) The controller opens or closes one of the intake valves in response to a signal value in which the torque detection signal value and the rotation detection signal value from the detection means for detecting engine rotation are equal to or less than respective preset values. 2. The electromagnetic valve for an engine according to claim 1, wherein the intake valve is controlled to open and close both of the intake valves in response to each detected signal value being equal to or greater than the set value. Control device.