JP2007056848A - Control device for internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of facilitating elimination of an incomplete valve close condition. <P>SOLUTION: The control device for the internal combustion engine is provided with an exhaust manifold 200 connected to the engine 1, a bypass path 210 having an inlet part 211 in an upstream side of each cylinder collection part 201 in the exhaust manifold 200 and an outlet part 212 in a downstream side of each cylinder collection part 201 in the exhaust manifold 200, a valve element 220 opening and closing the bypass path 210, and a controller 220C controlling open and close of the valve element 220. The controller 220C opens the valve element 220 based on detection of incomplete valve close condition of the valve of the engine 1 caused by pump up of a lash adjuster. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an internal combustion engine control device, and more particularly to an internal combustion engine control device that promotes elimination of an incompletely closed state of a valve mechanism having a lash adjuster.

2. Description of the Related Art Conventionally, a hydraulic lash adjuster applied to a valve mechanism of an internal combustion engine is known.
For example, Japanese Patent Application Laid-Open No. 5-288019 (Patent Document 1) discloses a hydraulic lash adjuster having a plunger filled therein with hydraulic oil and having a plunger having a small hole at the top.
Japanese Patent Laid-Open No. 5-288019 Japanese Patent Application Laid-Open No. H5-272312 JP-A 63-297710

  However, in the lash adjuster described in Patent Document 1, when the shaft of the engine valve is temporarily separated from the rocker arm due to, for example, valve surging, the plunger of the lash adjuster advances so as to fill the clearance. Oil flows into the body (reservoir). As a result, a phenomenon in which the lash adjuster extends excessively (hereinafter sometimes referred to as “pump-up”) occurs and the engine valve cannot be completely closed (hereinafter referred to as an incompletely closed state). May occur).

  On the other hand, Japanese Patent Laid-Open No. 5-272212 (Patent Document 2) discloses a lash adjuster in which the supply of hydraulic pressure to the hydraulic chamber is stopped for a predetermined period in order to reduce pump-up.

  In JP-A-63-297710 (Patent Document 3), a sensor is provided in the vicinity of the plunger, and a sensor detection unit such as a convex portion is provided on the plunger, whereby the position of the plunger is detected by the sensor. It is disclosed that the incomplete valve closing state is eliminated.

  However, even with the measures according to Patent Documents 2 and 3, the incomplete valve closing state may not always be solved sufficiently. Therefore, it is important to suppress the pump-up and eliminate the incomplete valve closing state from a viewpoint different from the conventional one.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a control device for an internal combustion engine that can promote elimination of an incompletely closed state.

  In one aspect, a control device for an internal combustion engine according to the present invention includes an engine valve of an internal combustion engine, a lash adjuster, a rocker arm supported at one end thereof by the lash adjuster, and the other end of the rocker arm being swung. A cam for opening / closing the engine, an abnormality determination device for detecting an incompletely closed state of the engine valve, an exhaust manifold connected to the internal combustion engine, and an inlet portion upstream of each cylinder assembly portion in the exhaust manifold. The exhaust manifold includes a bypass path having an outlet on the downstream side of each cylinder assembly part, a valve body that opens and closes the bypass path, and a controller that controls opening and closing of the valve body. The valve element is opened based on the detection of the incompletely closed state of the engine valve of the engine.

  According to the said structure, the force which opens the engine valve by the exhaust pressure from another cylinder can be reduced. As a result, elimination of the incomplete valve closing state can be promoted.

  In the control apparatus for an internal combustion engine, preferably, the bypass path includes a volume expansion unit that increases the volume of the bypass path.

  By providing the volume expansion section, the exhaust pressure is relieved. As a result, the elimination of the incomplete valve closing state can be further promoted.

  According to another aspect of the control device for an internal combustion engine of the present invention, the engine valve of the internal combustion engine, a lash adjuster, a rocker arm supported at one end by the lash adjuster, and the other end of the rocker arm are swung to the engine valve. A cam for opening and closing the engine, an abnormality determination device for detecting an incompletely closed state of the engine valve, a biasing means for biasing the engine valve so that the engine valve is closed, and a biasing means And a controller for controlling the urging force, and the controller increases the urging force of the urging means based on the incompletely closed state of the engine valve of the internal combustion engine detected by the abnormality determination device.

  According to the above configuration, the urging force of the urging means for closing the engine valve is increased, so that it is possible to promote the elimination of the incompletely closed state.

  In the control apparatus for an internal combustion engine, preferably, the urging means is a spring. Here, the control device further includes a pressing unit that presses the spring and an oil passage that reaches the pressing unit, and the pressing unit presses the spring when hydraulic pressure is supplied to the oil passage.

  According to the above configuration, when the pressing means presses the spring, the urging force in the valve closing direction by the spring becomes strong. As a result, elimination of the incomplete valve closing state can be promoted.

  According to another aspect of the control device for an internal combustion engine of the present invention, the engine valve of the internal combustion engine, a lash adjuster, a rocker arm supported at one end by the lash adjuster, and the other end of the rocker arm are swung. A cam for opening and closing the valve, an abnormality determination device for detecting an incompletely closed state of the engine valve, an oil passage for supplying oil to the lash adjuster, and a bubble rate reducing means for reducing the bubble rate of oil flowing through the oil passage And a controller for controlling the amount of oil supplied to the bubble rate reducing means. The controller determines that the incompletely closed state of the engine valve of the internal combustion engine is detected by the abnormality determination device. Suppresses the oil supply.

  According to the above configuration, the supply of oil to the bubble rate reducing means is suppressed, whereby the bubble rate of oil supplied to the lash adjuster increases and the hydraulic pressure in the lash adjuster decreases. Thereby, pump-up is suppressed. As a result, elimination of the incomplete valve closing state is promoted.

  According to the present invention, pump-up can be suppressed and the elimination of an incomplete valve closing state can be promoted.

  Hereinafter, an embodiment of a control device for an internal combustion engine according to the present invention will be described. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

(Embodiment 1)
1 is a cross-sectional view of a cylinder head to which a hydro lash adjuster included in an internal combustion engine control apparatus according to Embodiment 1 of the present invention is attached.

  With reference to FIG. 1, the hydro lash adjuster 100 is fitted into an opening 10 </ b> A formed in the cylinder head 10. The inside of the hydro lash adjuster 100 is filled with 100 L of oil.

  The hydro lash adjuster 100 has a housing 110 and is in contact with the rocker arm 20. The rocker arm 20 uses the hydro lash adjuster 100 as a fulcrum and receives the force from the cam 30 to reciprocate the valve 50. That is, when the cam 30 rotates, the contact point between the hydro lash adjuster 100 and the rocker arm 20 becomes a fulcrum, and the valve 50 reciprocates. The valve 50 is urged away from the combustion chamber 70 by the valve spring 40, and even after being pushed down by the cam 30, the valve 50 returns to its original position by the action of the valve spring 40. The tip of the valve 50 is provided in the vicinity of the boundary between the exhaust port 60 (and the inlet port) and the combustion chamber 70.

  FIG. 2 is a sectional view showing the hydro lash adjuster in FIG. 1 in detail. With reference to FIG. 2, the hydro lash adjuster 100 includes a housing 110, a plunger 120, a rod-shaped member 130, a check ball 140, a partition plate 150, and a spring 160.

  The housing 110 defines a high pressure chamber 151 and a low pressure chamber 152, and has an opening 110 </ b> A continuous with the low pressure chamber 152. The plunger 120 is fitted into the opening 110 </ b> A and contacts the rocker arm 20.

  The casing 110 has a box shape, and a high-pressure chamber 151 and a low-pressure chamber 152 are provided in its internal space. In the example of FIG. 2, the internal space of the housing 110 is a rectangular region, but is not limited thereto, and the cross section may be round (round).

  A plunger 120 is fitted into the opening 110A of the housing 110 so as to be movable in the vertical direction. The plunger 120 is slidable with the inner peripheral wall of the housing 110 constituting the opening 110A, and can move in a direction approaching the bottom portion 110B of the housing 110 and a direction away from the bottom portion 110B. Plunger 120 is fitted in the recess of the rocker arm, and the tip of plunger 120 is engaged with rocker arm 20.

  The plunger 120 is provided with a rod-shaped member 130 for pushing the check ball 140. One end of the rod-shaped member 130 contacts the plunger 120, and the other end contacts the check ball 140. Due to the presence of the rod-shaped member 130, the pressure in the direction of the arrow DR1 can be directly transmitted to the check ball 140.

  A partition plate 150 that partitions the high pressure chamber 151 and the low pressure chamber 152 is provided in the internal space of the housing 110. The partition plate 150 is provided with an opening 150A, and the low pressure chamber 152 and the high pressure chamber 151 communicate with each other through the opening 150A. The partition plate 150 receives a check ball 140 as a check valve. The check ball 140 seals the opening 150 </ b> A and suppresses the oil 100 </ b> L in the high pressure chamber 151 from flowing into the low pressure chamber 152.

  A force in the direction in which the oil 100L on the high pressure chamber 151 side flows to the low pressure chamber 152 side (the direction opposite to the arrow DR1 direction) is applied to the check ball 140 through the opening 150A. On the other hand, since the check ball 140 is held down by the rod-shaped member 130, the check ball 140 does not move to the plunger 120 side. Therefore, the oil 100L on the high pressure chamber 151 side is suppressed from flowing into the low pressure chamber 152 side.

  The partition plate 150 is provided so as to be movable in the vertical direction, and a spring 160 is disposed in the high pressure chamber 151 so as to support it. The spring 160 is interposed between the partition plate 150 and the bottom 110B, and changes the volume in the high-pressure chamber 151. The spring 160 transmits the force received from the partition plate 150 to the bottom 110B.

  The hydro lash adjuster 100 adjusts the clearance between the swing arm rocker arm 20 of the overhead cam and the valve 50. The hydro lash adjuster 100 is introduced with oil 100L composed of engine oil. The hydro lash adjuster 100 changes its entire length and automatically adjusts the gap between the rocker arm 20 and the valve 50 (keep the gap at zero). The operation of the hydro lash adjuster 100 will be described as follows.

  When the engine rotates, oil 100L is introduced into the low-pressure chamber 152 from the opening 10A around the hydro lash adjuster 100 through a hole (not shown) provided in the housing 110. A part of the oil 100L lubricates a contact portion between the plunger 120 and the rocker arm 20. Further, when the hydraulic pressure in the high pressure chamber 151 decreases, the oil 100L is supplied into the high pressure chamber 151.

  FIG. 3 is a cross-sectional view of the cylinder head shown for explaining the cam lift. 2 and 3, when the cam 30 tries to push down the rocker arm 20, the rocker arm 20 tries to push down the valve 50 and the plunger 120 at the same time. However, when the plunger 120 is pushed down, the high pressure chamber 151 sealed by the check ball 140 becomes high pressure, the plunger 120 is not lowered, and the rocker arm 20 moves using the contact point between the rocker arm 20 and the plunger 120 as a fulcrum and pushes down the valve 50. .

  When the cam 30 rotates and the rocker arm 20 is not pushed down, the spring 160 in the high pressure chamber 151 pushes up the plunger 120 as shown in FIG. As a result, the occurrence of a gap between the cam 30 and the rocker arm 20 is suppressed.

  FIG. 4 is a diagram showing a configuration of an oil passage that supplies oil to the hydro lash adjuster 100. Referring to FIG. 4, the cylinder head is provided with a plurality of hydro lash adjusters 100, and these hydro lash adjusters 100 are connected to each other by a lash adjuster oil passage 90. The lash adjuster oil passage 90 is connected to the main oil passage 80. The main oil passage 80 connects the oil pan 81, the oil pump 82, the oil filter 83, and the block 84, and becomes a main passage for engine oil. Oil in the main oil passage 80 is circulated by an oil pump 82. An electromagnetic valve (not shown) is provided at a boundary portion between the main oil passage 80 and the lash adjuster oil passage 90, and the main oil passage 80 and the lash adjuster oil passage 90 can be cut and connected. The main oil passage 80 also lubricates the variable valve timing mechanism inlet 85, the chain 86 and the variable valve timing mechanism outlet 87. Further, the cam bearing 31 is also lubricated by the main oil passage 80.

  By the way, when the valve 50 is temporarily separated from the rocker arm 20 due to valve surging or the like, the plunger 120 of the hydro lash adjuster 100 advances to fill the gap, and the oil 100L flows into the housing 110. Thereby, the phenomenon (pump-up) that the hydro lash adjuster 100 extends excessively may occur. When pump-up occurs, the oil 100L flowing into the casing 110 prevents the plunger 120 from entering the casing 110, and the valve 50 cannot be completely closed (incompletely closed state). May occur.

  If an incomplete valve closing state occurs, combustion gas leaks from the combustion chamber 70 to the intake and exhaust passages, and there is a concern that the reliability of the intake system components and exhaust system components may be reduced and the output torque of the engine may be reduced. . Therefore, it is desirable to detect an incomplete valve closing state promptly and take appropriate measures.

  On the other hand, the control device for an internal combustion engine according to the present embodiment includes an abnormality determination device 300 that detects an incompletely closed state of the valve 50 as shown in FIGS. Referring to FIGS. 1 and 3, abnormality determination device 300 includes a position sensor 310 and an electronic control device 320. The position sensor 310 monitors the position of the rocker arm 20. That is, the rocker arm 20 is provided with a sensor detection unit. When pump-up occurs and the extension amount of the hydro lash adjuster 100 changes, the rocking mode of the rocker arm 20 also changes accordingly. Based on the measurement result of the position sensor 310, the electronic control unit 320 detects a change in the rocking mode of the rocker arm 20, and detects the occurrence of an incomplete valve closing state.

  In addition, it is possible to detect the occurrence of pump-up by providing a sensor detection unit in the plunger 120 and detecting the position of the plunger, but in this case, the inertia of the plunger 120 slightly changes. As described above, by providing the sensor detection unit in the rocker arm 20, it is possible to detect the occurrence of an incomplete valve closing state due to pump-up without affecting the behavior of the plunger 120.

  In the present embodiment, as a measure for eliminating the incomplete valve closing state, a bypass path 210 is provided in the exhaust manifold 200 of the engine 1 as shown in FIG.

  Referring to FIG. 5, an inlet portion 211 of the bypass passage 210 is provided in each cylinder of the exhaust manifold 200, and an outlet portion 212 of the bypass passage 210 is provided on the downstream side of each cylinder assembly portion 201 of the exhaust manifold 200. . A valve body 220 is provided at the inlet portion 211. The opening and closing of the valve body 220 is controlled by the controller 220C. As a result, the bypass path 210 is opened and closed.

  During normal operation, the valve body 220 is in a closed state, and the exhaust from the engine 1 is discharged from each cylinder of the exhaust manifold 200 via each cylinder assembly portion 201. Since the exhaust from each cylinder of the engine 1 is performed at a timing shifted from each other, force in the valve opening direction may act on the valve 50 in the valve closing state due to exhaust pressure from other cylinders.

  On the other hand, when the incomplete valve closing state is detected by the abnormality determination device 300, the valve body 220 is opened by the controller 220 </ b> C, and exhaust from the engine 1 is sent from each cylinder of the exhaust manifold 200 via the bypass path 210. Guided to the downstream side of the cylinder assembly 201. In this way, by exhausting the exhaust from the engine 1 via the bypass path 210, it is possible to suppress the force in the valve opening direction from acting on the valve 50 in the closed state due to the exhaust pressure from the other cylinders. . As a result, the incomplete valve closing state is easily resolved.

  The valve body 220 is typically opened / closed simultaneously in all cylinders, but may be opened / closed separately for each cylinder. When the valves are opened separately for each cylinder, for example, it is conceivable that the valve bodies 220 are sequentially opened according to the explosion order of each cylinder in the engine 1.

  6 and 7 are diagrams showing modifications of the bypass path 210 shown in FIG. As shown in FIG. 6, the bypass path 210 may be provided with a large-diameter portion 213 having a diameter (D2) larger than the diameter (D1) of the other portion. As shown in FIG. A chamber 214 may be provided. In either case, the volume of the bypass path 210 can be increased. Thereby, exhaust pressure can be relieved.

  In other words, the contents described above are as follows. That is, the control device for an internal combustion engine according to the present embodiment is supported at one end by a valve 50 which is an “engine valve” of the engine 1 which is an “internal combustion engine”, a hydro lash adjuster 100, and a hydro lash adjuster 100. The rocker arm 20, the cam 30 that opens and closes the valve 50 by swinging the other end of the rocker arm 20, the abnormality determination device 300 that detects the incompletely closed state of the valve 50, and the exhaust manifold connected to the engine 1 200, a bypass path 210 having an inlet 211 on the upstream side of each cylinder aggregate 201 in the exhaust manifold 200 and having an outlet 212 on the downstream side of each cylinder aggregate 201 in the exhaust manifold 200, and a bypass path Valve body 220 for opening and closing 210, and opening of valve body 220 And a controller 220C that controls, controller 220C is open the valve body 220 on the basis that the malfunction determining device 300 incompletely closed state of the valve 50 is detected.

  According to the above configuration, the force for opening the valve 50 due to the exhaust pressure from the other cylinders can be reduced. As a result, elimination of the incomplete valve closing state can be promoted.

  In the control device for an internal combustion engine, the bypass passage 210 is provided with a large diameter portion 213 or a volume chamber 214. The large diameter part 213 and the volume chamber 214 constitute a “volume expansion part” that increases the volume of the bypass path 210.

  By providing the large diameter portion 213 or the volume chamber 214 in the bypass path 210, the exhaust pressure is relieved. As a result, the elimination of the incomplete valve closing state can be further promoted.

(Embodiment 2)
FIG. 8 is a diagram showing a control device for an internal combustion engine according to the second embodiment. The control apparatus for an internal combustion engine according to the present embodiment is a modification of the control apparatus for the internal combustion engine according to the first embodiment, and the biasing force of the valve spring 40 is applied when an incomplete valve closing state is detected. It is characterized by increasing.

  With reference to FIG. 8, the cylinder head 10 is provided with a piston 41 and an oil passage 42. A valve 43 is provided in the oil passage 42. The opening / closing of the valve 43 is controlled by the controller 43C. The hydraulic pressure is supplied to the oil passage 42 by opening the valve 43. When hydraulic pressure is supplied to the oil passage 42, the piston 41 is pushed up in the direction of the arrow DR2. As a result, an axial force is applied to the valve spring 40 provided between the cylinder head 10 and the retainer 51. And the urging | biasing force to the valve closing direction of the valve 50 by the valve spring 40 increases. As a result, the incomplete valve closing state is easily resolved.

  In other words, the contents described above are as follows. That is, the control device for an internal combustion engine according to the present embodiment is supported at one end by a valve 50 which is an “engine valve” of the engine 1 which is an “internal combustion engine”, a hydro lash adjuster 100, and a hydro lash adjuster 100. The rocker arm 20, the cam 30 that opens and closes the valve 50 by swinging the other end of the rocker arm 20, the abnormality determination device 300 that detects the incompletely closed state of the valve 50, and the valve 50 are closed. The valve spring 40 as an “urging means” for urging the valve 50 and a controller 43C for controlling the urging force of the valve spring 40 are provided. The biasing force of the valve spring 40 is increased based on the detection of the valve closing state.

  According to the above configuration, since the urging force of the valve spring 40 that closes the valve 50 is increased, the elimination of the incompletely closed state can be promoted.

  The control device for the internal combustion engine further includes a piston 41 as “pressing means” for pressing the valve spring 40, and an oil passage 42 reaching the piston 41. The piston 41 presses the valve spring 40 by supplying hydraulic pressure to the oil passage 42.

  According to the above configuration, when the piston 41 presses the valve spring 40, the urging force in the valve closing direction by the valve spring 40 becomes stronger. As a result, elimination of the incomplete valve closing state can be promoted.

(Embodiment 3)
FIG. 9 is a diagram showing a control device for an internal combustion engine according to the third embodiment. The control apparatus for an internal combustion engine according to the present embodiment is a modification of the control apparatus for the internal combustion engine according to the first and second embodiments, and when an incomplete valve closing state is detected, the main oil passage 80 and It is characterized in that the bubble ratio in the oil flowing through the lash adjuster oil passage 90 is increased.

  Referring to FIG. 8, a shower pipe 88 having an opening 88 </ b> A is connected to main oil passage 80. A valve body 89 is provided at the inlet of the shower pipe 88. The opening / closing of the valve body 89 is controlled by the controller 89C. By supplying oil from the opening 88 </ b> A of the shower pipe 88, parts of the engine 1 are lubricated.

  During normal operation, the valve body 89 is in an open state, and oil as lubricating oil is supplied from the opening 88A of the shower pipe 88. By discharging the oil from the shower pipe 88, the bubbles contained in the oil are discharged. That is, the shower pipe 88 functions to reduce the bubble rate in the oil.

  On the other hand, when the incomplete valve closing state is detected by the abnormality determination device 300, the valve body 89 is closed by the controller 89C, and the oil discharge from the shower pipe 88 is stopped. As a result, the function of reducing the bubble rate in the oil by the shower pipe 88 is not fulfilled, so the bubble rate of the oil flowing through the main oil passage 80 and the lash adjuster oil passage 90 increases. As a result, the hydraulic pressure in the housing 110 of the hydro lash adjuster 100 is reduced, and pumping up is suppressed. And it becomes easy to eliminate an incomplete valve closing state.

  In other words, the contents described above are as follows. That is, the control device for an internal combustion engine according to the present embodiment is supported at one end by a valve 50 which is an “engine valve” of the engine 1 which is an “internal combustion engine”, a hydro lash adjuster 100, and a hydro lash adjuster 100. Oil is supplied to the rocker arm 20, the cam 30 that swings the other end of the rocker arm 20 to open and close the valve 50, the abnormality determination device 300 that detects the incompletely closed state of the valve 50, and the hydro lash adjuster 100. The main oil passage 80 and the lash adjuster oil passage 90, the shower pipe 88 as "bubble ratio reducing means" for reducing the bubble ratio of the oil flowing through the main oil passage 80 and the lash adjuster oil passage 90, A controller 89C for controlling the oil supply amount, and a controller 8 C is the malfunction determining device 300 based on the incomplete closed state of the valve 50 is detected to suppress the supply of oil to the shower pipe 88.

  According to the above configuration, the supply of oil to the shower pipe 88 is suppressed, so that the bubble ratio of the oil supplied to the hydro lash adjuster 100 increases and the hydraulic pressure in the hydro lash adjuster 100 decreases. Thereby, pump-up is suppressed. As a result, elimination of the incomplete valve closing state is promoted.

  Although the embodiments of the present invention have been described above, it is planned from the beginning to appropriately combine the characteristic portions of the respective embodiments described above. Moreover, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is sectional drawing of the cylinder head to which the hydro lash adjuster contained in the control apparatus of the internal combustion engine which concerns on Embodiment 1 of this invention was attached. It is sectional drawing which shows the hydro lash adjuster in FIG. 1 in detail. It is sectional drawing of the cylinder head shown in order to demonstrate the time of a cam lift. It is the figure which showed the structure of the oil path which supplies oil to the hydro lash adjuster shown by FIGS. It is the figure which showed the control apparatus of the internal combustion engine which concerns on Embodiment 1 of this invention. FIG. 6 is a view showing a modified example of the bypass path in the exhaust manifold shown in FIG. 5. FIG. 6 is a view showing another modification of the bypass path in the exhaust manifold shown in FIG. 5. It is the figure which showed the control apparatus of the internal combustion engine which concerns on Embodiment 2 of this invention. It is the figure which showed the control apparatus of the internal combustion engine which concerns on Embodiment 3 of this invention.

Explanation of symbols

  1 engine, 10 cylinder head, 10A opening, 20 rocker arm, 30 cam, 31 cam bearing, 40 valve spring, 41 piston, 42 oil passage, 43 valve body, 43C controller, 50 valve, 51 retainer, 60 exhaust port, 70 combustion Chamber, 80 main oil passage, 81 oil pan, 82 oil pump, 83 oil filter, 84 block, 85 variable valve timing mechanism inlet, 86 chain, 87 variable valve timing mechanism outlet, 88 shower pipe, 88A opening, 89 valve body, 89C controller, 90 lash adjuster oil passage, 100 hydro lash adjuster, 100L oil, 110 housing, 110A opening, 110B bottom, 120 plunger, 130 bar member, 140 check 150, partition plate, 150A opening, 151 high pressure chamber, 152 low pressure chamber, 160 spring, 200 exhaust manifold, 201 cylinder assembly, 210 bypass path, 211 inlet, 212 outlet, 213 large diameter, 214 volume Chamber, 220 valve body, 220C controller, 300 abnormality determination device, 310 position sensor, 320 electronic control device.

Claims (5)

An internal combustion engine valve;
Rush adjuster,
A rocker arm whose one end is supported by the lash adjuster;
A cam that swings the other end of the rocker arm to open and close the engine valve;
An abnormality determination device for detecting an incompletely closed state of the engine valve;
An exhaust manifold connected to the internal combustion engine;
A bypass path having an inlet on the upstream side of each cylinder collecting part in the exhaust manifold, and having an outlet on the downstream side of each cylinder collecting part in the exhaust manifold;
A valve body for opening and closing the bypass path;
A controller for controlling the opening and closing of the valve body,
The controller is a control device for an internal combustion engine, which opens the valve body based on detection of an incompletely closed state of the engine valve of the internal combustion engine by the abnormality determination device.   The control device for an internal combustion engine according to claim 1, wherein the bypass path includes a volume expansion unit that increases a volume of the bypass path. An internal combustion engine valve;
Rush adjuster,
A rocker arm whose one end is supported by the lash adjuster;
A cam that swings the other end of the rocker arm to open and close the engine valve;
An abnormality determination device for detecting an incompletely closed state of the engine valve;
Biasing means for biasing the engine valve so that the engine valve is closed;
A controller for controlling the biasing force of the biasing means,
The controller is a control device for an internal combustion engine, which increases an urging force of the urging means based on detection of an incompletely closed state of the engine valve of the internal combustion engine by the abnormality determination device. The biasing means is a spring;
Pressing means for pressing the spring;
An oil passage reaching the pressing means,
The control device for an internal combustion engine according to claim 3, wherein the pressing means presses the spring when hydraulic pressure is supplied to the oil passage. An internal combustion engine valve;
Rush adjuster,
A rocker arm whose one end is supported by the lash adjuster;
A cam that swings the other end of the rocker arm to open and close the engine valve;
An abnormality determination device for detecting an incompletely closed state of the engine valve;
An oil passage for supplying oil to the lash adjuster;
A bubble ratio reducing means for reducing a bubble ratio of oil flowing through the oil passage;
A controller for controlling the amount of oil supplied to the bubble ratio reducing means,
The controller is a control device for an internal combustion engine that suppresses supply of oil to the bubble ratio reducing means based on detection of an incomplete valve closing state of the engine valve of the internal combustion engine by the abnormality determination device.

Images