KR102223439B1 - Flexible cam technology - Google Patents

Abstract

The present disclosure relates to flexible cam technology, wherein a cam follower assembly 14 for controlling the operation of an internal combustion engine includes a cam follower 18 configured to follow the cam 12. The cam follower assembly 14 further includes a cam follower support 20 pivotable about a pivot axis B spaced from the camshaft axis A. The cam follower support 20 supports the cam follower 18. An actuator 22 is interposed between the cam follower 18 and the cam follower support 20 and is perpendicular to the camshaft axis A which can help to change the timing of the operation of the connected component. It is configured to displace the cam follower 18.

Description

Flexible cam technology {FLEXIBLE CAM TECHNOLOGY}

The present disclosure relates to a method and apparatus for controlling the operation of an internal combustion engine, and more particularly to control a component controlled by a motion elevation supported by a cam follower that follows a cam of a camshaft. It relates to a method and an apparatus for doing so.

Several techniques are known for coordinating the operation of components of an internal combustion engine, such as, for example, inlet valves, outlet valves, and fuel pumps. This technique may allow adjusting the opening and closing of the inlet and outlet valves, and may allow adjusting the timing of the operation of the fuel pump.

For example, EP 2 136 054 A1 discloses a device for controlling the operation of an engine with a rotatable shaft with three eccentrics. Each eccentric portion supports an operating lever. The first eccentric portion supports, for example, an inlet valve operation lever formed as an oscillating arm, and the inlet valve operation lever can track the stroke of the inlet cam through, for example, a roll supported on the top. And, for example, it may be possible to operate the inlet valve by transferring the stroke to the inlet valve through a valve operation riser. In a similar manner, the second eccentric portion supports the outlet valve actuation valve, the outlet valve actuation lever being able to track the stroke of the outlet cam, for example through a roll supported on the top, and the stroke to the outlet. It will be able to deliver to the valve action lift. The stroke of the fuel pump cam may be tracked, for example, by a roll arranged at the end of the pump operating lever and may be transmitted to the pump piston, for example via a pressure spring. The pump operating lever is supported on the third eccentric. The eccentric portion may be formed integrally with the rotatable shaft. Preferably, the relative position of the eccentricity of the circular cylindrical outer circumferential surface of the eccentric with respect to the axis of the rotatable shaft, as well as the relative position of the eccentricity with respect to the rotational position of the shaft, may be individually selected according to the respective requirements. The actuator and gear wheel form the actuator unit. In stationary operation, the diesel engine operates at a load greater than 25% of the full load with two valve lift curves, for example in the Miller cycle. At loads of 25% or less of the total load, the shaft is turned and the engine is thus operated with two different valve lift curves. This technology is also known as flexible camshaft technology (FCT).

The present disclosure is intended, at least in part, to improve or overcome one or more aspects of prior art systems.

According to a first aspect of the present disclosure, a cam follower assembly for controlling operation of an internal combustion engine comprising a camshaft rotatable about a camshaft axis is disclosed, the camshaft having at least one cam. The cam follower assembly is pivotably supported through a cam follower configured to follow one cam, a support shaft pivotable around a pivot axis spaced apart from the camshaft axis, and a support shaft around the pivot axis, and the cam follower A cam follower support part supporting the cam follower and interposed between the cam follower support part and the cam follower support part, toward the cam follower support part 20 in a direction perpendicular to the camshaft axis or the cam follower support part 20 It may include an actuator configured to displace the cam follower away from it.

According to another aspect of the present disclosure, an apparatus for controlling the operation of an internal combustion engine comprising a camshaft rotatable about a camshaft axis is disclosed, the camshaft having a plurality of cams. The apparatus may include a plurality of cam follower assemblies as illustratively disclosed herein, wherein each cam follower of the plurality of cam follower assemblies drives one of the plurality of cams.

According to another aspect of the present disclosure, a method for controlling operation of an internal combustion engine comprising a camshaft rotatable about a camshaft axis is disclosed, the camshaft having at least one cam. The method includes providing a cam follower assembly as exemplarily disclosed herein, rotating the camshaft about the camshaft axis, the cam follower in a direction perpendicular to the camshaft axis through an actuator. And varying the operating time of the component operated by the motion rising portion supported by the cam follower by displacing the cam follower.

Other features and aspects of this disclosure will become apparent from the following description and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings included herein and constituting a part of this specification serve to explain exemplary embodiments of the disclosure and, together with the detailed description, explain the principles of the disclosure.
1 shows a schematic diagram of an exemplary cam follower assembly for controlling the operation of an internal combustion engine according to the present disclosure.
2 shows a schematic diagram of an exemplary apparatus for controlling the operation of an internal combustion engine according to the present disclosure.
3 shows a schematic view of the retracted position of the exemplary cam follower assembly.
4 shows a schematic view of an intermediate position of an exemplary cam follower assembly.
5 shows a schematic view of an extended position of an exemplary cam follower assembly.
6 shows a graph showing exemplary timing of operation in accordance with the present disclosure.
7 shows another graph showing an exemplary timing of operation in accordance with the present disclosure.
8 shows another graph showing an exemplary timing of operation in accordance with the present disclosure.

The following is a detailed description of an exemplary embodiment of the present disclosure. The exemplary embodiments disclosed herein and shown in the drawings are intended to illustrate the principles of the present disclosure and enable a person skilled in the art to implement and use the present disclosure in many different environments and in many different applications. Accordingly, the exemplary embodiments are not intended as a limiting description of the scope of patent protection, and should not be regarded as such. Rather, the scope of the patent protection should be defined by the appended claims.

The present disclosure is based, in part, on realizations in which hydraulic circuits can be introduced into field FCTs. The hydraulic circuit may allow to increase the degree of control over the timing of operation of components operated by the camshaft, such as inlet valves, outlet valves, gas valves, and fuel pumps. Additionally, a hydraulic circuit may be implemented in the FCT to facilitate individual control of components operated by the same camshaft. In addition, hydraulic circuits may be implemented in the FCT, providing a continuous control range as a control component.

As an alternative to providing a hydraulic actuator, a pneumatic actuator that is part of a pneumatic circuit, or an electric actuator that is part of an electrical circuit may be provided.

Accordingly, a cam follower assembly using an actuator to assist in a change in the operation timing of a component operated by the cam follower of the cam follower assembly through displacement of the cam follower relative to the camshaft is disclosed. As described above, the actuator may be implemented as a hydraulic actuator, a pneumatic actuator, or an electric actuator.

According to Fig. 1, there is provided an internal combustion engine, not shown, which can be charged (supercharged) through an exhaust gas turbocharger (not shown), including a camshaft 10 (only some are shown). The camshaft 10 includes at least one cam 12 that can be integrally formed with the camshaft 10. The camshaft 10 is rotatably supported and can be rotated around the camshaft axis A. Additionally, the camshaft 10 may include an additional cam (not shown) so that the camshaft 12 has a plurality of cams.

An internal combustion engine including the camshaft 10 may include features not shown, such as air systems, cooling systems, peripherals, drivetrain components, and the like. Further, the internal combustion engine may be of any size with any number of cylinders, and may have any configuration (eg, “V”, in-line, radial, etc.). Additionally, internal combustion engines may include, but are not limited to, locomotive applications, on-highway trucks or vehicles, off-highway trucks or machines, ground mobile equipment, generators, and space applications. It may be used to power any machine or other device, including marine applications, offshore applications, pumps, stationary equipment, or other engine powered applications. The internal combustion engine may be powered with any fuel including, but not limited to, diesel, gasoline, and/or gaseous fuel. For example, the internal combustion engine may be a dual fuel engine that can be operated on liquid fuel and/or gaseous fuel, or it can be an engine that can be operated on various liquid fuels such as diesel and heavy fuel oil. There will be.

The cam 12 is configured to operate the components of the internal combustion engine through the cam follower assembly 14 and the motion lift 16. As will be described in more detail below, the component may be, for example, an inlet valve, an outlet valve, a gas valve or a fuel pump.

The cam follower assembly 14 for controlling the operation of the internal combustion engine includes a cam follower 18, a cam follower support 20, and an actuator 22. The cam follower 18 raises the motion supported on the cam follower 18 to control the components and, for example, by pulling the stroke of the cam 12 through a roll 24 supported at the top. It is configured to follow the cam 12 by transmitting the stroke to the component through the portion 16.

In order to enable pivoting of the cam follower assembly 14, the cam follower support 20 is pivotally supported, for example via a support shaft 23, and thus the cam follower support 20 ) Can be pivoted around the pivot axis B, arranged in parallel, spaced apart from the camshaft axis A, for example spaced apart from the camshaft axis A.

The cam follower support 20 supports the cam follower 18 via at least one guide pin, for example, two of the guide pins are shown in the embodiment shown in FIG. 1 and see each It is cited by the numbers '26' and '28'. On the guide pins 26 and 28, the cam follower 18 can be guided during the displacement caused by the actuator 22. Guide pins 26 and 28 can be rigidly fixed to the cam follower support 20 or to the cam follower 18, and the cam follower 18 or cam follower support 20 ) It will be able to slide within each inner guide pin recess (not shown). In the illustrated embodiment, the guide pins 26 and 28 may have a circular cross section. In other embodiments, the guide pins 26 and 28 may have any other suitable cross-section including, but not limited to, a square cross-section, and a rectangular cross-section. Alternatively, the cam follower assembly 14 may not include any guide pins, and the support of the cam follower 18 may be realized through the actuator 22.

In order to assist the displacement of the cam follower 18 towards or away from the cam follower support 20, it is interposed between the cam follower 18 and the cam follower support 20, And by displacing the cam follower 18 in a direction perpendicular to the camshaft axis A, the cam follower 18 tracks the cam 12 of the camshaft 10 during the rotation of the camshaft 10. An actuator 22 is provided, which is configured to change the timing of operation of a component actuated by the supported motion elevation. 'Vertical' as used herein may refer to being substantially vertical including an angular value of about 90° which still aids in the above-described change in operating time due to displacement of the cam follower 18. The actuator 22 may be implemented as a hydraulic actuator, a pneumatic actuator, or an electric actuator. Although the following description focuses on embodiments including hydraulic actuators, those skilled in the art will appreciate that pneumatic and electric actuators may also be used as actuator 22.

The hydraulic actuator 22 may be, for example, a double acting hydraulic cylinder or a single acting hydraulic cylinder having a spring-return.

For example, in an embodiment in which the hydraulic actuator 22 is configured as a single acting cylinder, the hydraulic actuator 22 is arranged in the cam follower 18 and connected to the hydraulic feed line 30. It may include a fluid chamber (not shown). By allowing the flow of hydraulic fluid through the valve 32 and supplying the hydraulic fluid to the fluid chamber, the piston can be displaced, which displacement in turn causes the cam follower 18 to move to the cam follower. It is displaced with respect to the support part 20, and thereby also displaced with respect to the camshaft 10. The fluid chamber may additionally be connected to a hydraulic bleed line 34 with a valve 36 to draw hydraulic fluid. A spring-return may be provided to deflect the piston of the hydraulic actuator 22. Alternatively, a fluid chamber could be provided in the cam follower support 20.

In another example in which the hydraulic actuator 22 is configured as a double acting hydraulic actuator, movement of the piston may be induced between two fluid chambers to which hydraulic fluid is selectively supplied. When hydraulic fluid is supplied to one chamber, opening of the bleed valve may allow hydraulic fluid from the other fluid chamber to flow out of the other fluid chamber, and vice versa. will be. Both fluid chambers may be arranged in the cam follower 18 or in the cam follower support 20. Alternatively, one fluid chamber may be provided in the cam follower 18 and another fluid chamber may be provided in the cam follower support 20.

Referring to Fig. 2, a device 38 for controlling the operation of an internal combustion engine is shown. It should be noted that the device 38 is merely exemplary to illustrate the various applications of the cam follower assembly 14. Accordingly, elements similar to FIG. 1, which may now have specific tasks or functions, are cited by reference numerals such as those recited throughout FIG. 1.

In the illustrated embodiment, the camshaft 10 has three cams 12, 12', and 12". In the configuration shown, the individual cams are inlet cam 12, outlet cam 12', And a pump cam 12".

The inlet cam 12 is arranged in the inlet of a combustion chamber of a cylinder of an internal combustion engine and is configured to operate an inlet valve actuated through the inlet cam follower assembly 14 and the inlet valve actuation riser 16. The outlet cam 12' is configured to operate an outlet valve arranged in the outlet of the combustion chamber of the cylinder of the internal combustion engine through the outlet cam follower assembly 14' and the outlet valve operation lift 16'. The pump cam 12" is configured to operate a pump piston arranged in the injection pump through the pump cam follower assembly 14" and the fuel pump motion lift 16".

Each of the inlet cam follower support 20, the outlet cam follower support 22', and the pump cam follower support 22" are each individually pivotably supported by a separate support shaft 23 and each It can be pivoted about the pivot axis B. Alternatively, the cam follower support of each cam follower assembly can be pivotally supported by a single support shaft rotatable about the pivot axis, or A subgroup of cam follower supports of the may be pivotally supported by one support shaft rotatable about the pivot axis.

3-5, some possible displacement positions of the cam follower assembly 14 are shown. Specifically, Fig. 3 shows the retracted position of the cam follower assembly 14, Fig. 4 shows the intermediate position, and Fig. 5 shows the extended position. Due to the continuous working principle of the hydraulic actuator 22, the cam follower 18 can be continuously displaced between a fully retracted position and a fully extended position.

For example, the fully retracted position may be spaced within a range of 2 mm to 40 mm from the fully extended position, the separation range may depend, for example, on the engine type and size.

In some embodiments, the hydraulic actuator 22 may be configured to move the cam follower 18 at a translational speed corresponding to the rotational speed of the camshaft 10 during operation. Specifically, the hydraulic actuator 22 may be configured to move the cam follower 18 at a translational speed substantially corresponding to the outer circumferential speed of the distal end of the cam 12 of the camshaft 10 in which the hydraulic actuator 22 rotates. There will be.

Industrial applicability

Hereinafter, the function of the cam follower assembly 14 will be described with reference to FIGS. 1 to 9 and specifically with reference to the actuator 22 implemented as a hydraulic actuator. As mentioned above, the actuator 22 could alternatively be implemented as a pneumatic actuator or an electric actuator.

The illustratively disclosed cam follower assembly 14 can be used in a variety of ways to increase the degree of control over an internal combustion engine. Specifically, a method for controlling the operation of an internal combustion engine includes the steps of providing a cam follower assembly 14 as exemplarily disclosed herein, and moving the camshaft 10 during operation of the internal combustion engine. A) rotating around. Additionally, for example, the operating time of a component such as a valve or fuel pump operated by the motion rising portion 16 supported by the cam follower 18 is determined by the hydraulic actuator 22. It can be changed by displacing the cam follower 18 in a direction perpendicular to the camshaft axis A.

A first possibility for using the cam follower assembly 14 to change the operating time of the component is shown in Fig. 6, which is a graph. In addition to the graphs shown in Figs. 7 and 8, the graph shown in Fig. 6 shows a horizontal axis representing a crank angle between 0° and 720°, and a normalized rise between a value of 0 and a value of 1. Includes a vertical axis representing. The lift refers to a stroke motion of the motion lift unit 16 caused by the cam follower 18 that converts the rotational motion of the camshaft 10 into a translational motion. For example, raising could refer to the valve raising of the inlet valve or outlet valve, where a value of 0 means that the valve is fully closed, and a value of 1 means that the valve is fully open.

In particular, three exemplary curves are shown in FIG. 6. The first curve 40 (shown as a solid line) represents an elevation dependent on the crank angle relative to the intermediate position of the cam follower assembly 14, for example as shown in FIG. 4. If the position of the cam follower 18 relative to the camshaft 10 is changed by displacement through the hydraulic actuator 22, the curve 40 may be shifted. For example, in the extended position of the hydraulic actuator 22 as compared to the position of the hydraulic actuator 22 that induces the curve 40, the cam follower 18 is earlier compared to the curve 40. It may be raised by the cam 12, resulting in a curve 42 (shown as a dotted curve). In other words, the operating time of a component such as an inlet valve, outlet valve, or fuel pump is advanced (advanced). For example, in the configuration shown, the hydraulic actuator 22 is extended to displace the cam follower 18 relative to the camshaft 10.

In a similar manner, in the retracted position of the hydraulic actuator 22 compared to the position of the hydraulic actuator 22 resulting in curves 40 and 42, the cam follower 18 is more than the curves 40 and 42. It may be raised by the cam 12 late, resulting in a curve 44 (shown as a chain curve). In other words, the operating time of components such as inlet valves, outlet valves, or fuel pumps is delayed. For example, in the configuration shown, the hydraulic actuator 22 is retracted to displace the cam follower 18 relative to the camshaft 10. In other words, by displacing the cam follower 18 through the hydraulic actuator 22 in a direction perpendicular to the camshaft axis A, the operating time of a component such as an inlet valve, an outlet valve, or a fuel pump Is delayed (delayed).

Of course, the curves of the extended and retracted positions of the cam follower assembly 14 may be varied depending on the position of the cam follower support 20 relative to the camshaft 10.

Another possibility for using the cam follower assembly 14 to change the operating time of the component is shown in FIGS. 7 and 8.

In Fig. 7, an exemplary curve 46 (shown as a solid line) is shown showing the motion-free motion of the cam follower 18 during one rotation of the camshaft 10. In contrast, curve 48 (shown as a dashed-line curve) and curve 50 (shown as a dotted-line curve) are from the motion of the cam follower 18 during one rotation of the camshaft 10. Is obtained. Similarly, in Fig. 8, an exemplary curve 52 represents the motion without movement of the cam follower 18 during one rotation of the camshaft 10, and a curve 54 (shown as a chain line curve). And curve 56 (shown as a dotted line curve) is obtained from the motion of the cam follower 18 while the camshaft 10 rotates once.

Specifically, the curve 48 is the extended complete operation at a rising value of 1.0 compared to the operation start time advanced relative to the operation start time of the curve 46, the rising value of 1.0 of the curve 46. It includes the run, and the same run-down time as compared to curve 46. In contrast, curve 50 includes the same start time as curve 46, extended full run at a rising value of 1.0 compared to curve 46, and delayed end time compared to curve 46. do. As can be clearly seen, both curves 48 and 50 have an extended operating time span, within which the rising value, relative to curve 46, is not equal to a value of 0.0.

For example, the chain curve 48 may result from the following operation of the cam follower assembly 14. While the cam 12 is not in contact with the roll 24, the cam follower 18 may be moved to advance the start time of the component. During the time the component is actuated up to a rising value of 1.0, the cam follower 18 holds its position. During full operation at a rising value of 1.0, the cam follower 18 is moved in the direction of the cam 12 in order to delay the operation end time. As the operation end times of curve 46 and curve 48 are the same, the cam follower of curve 48 to a specific position where the cam follower 18 of curve 48 is located during the end operation time (during) the cam follower of curve 48 It will be appreciated that (18) is shifted.

Referring to Figure 8, the curve 54, the operation start time advanced relative to the operation start time of the curve 52, at a rising value of 1.0 compared to the complete operation at the rising value of 1.0 of the curve 52 Extended complete operation of the, and a delayed shutdown time compared to curve 52. In contrast, curve 54 has a delayed start-up time compared to curve 52, a shortened full run at a rising value of 1.0 compared to curve 52, and the run-down time of curve 52. Includes advanced shutdown time. As can be clearly seen, curve 54 has an extended operating time range, within which the rising value, relative to curve 52, is not equal to a value of 0.0, whereas curve 56 is It has a shortened operating time range compared to curve 52.

For example, the dotted curve 56 may result from the following operation of the cam follower assembly 14. While the cam 12 is not in contact with the roll 24, the cam follower 18 may be moved to delay the start time of the component's operation. The cam follower 18 holds (holds) its position during the time the component is actuated up to a rising value of 1.0. During full operation at a rising value of 1.0, the cam follower 18 moves in the direction opposite to the rotating cam 12, advancing the operation end time to shorten the operating time range.

As illustrated exemplarily in connection with FIGS. 7 and 8, extending the operating time range is that while the cam 12 is in contact with the roll 24, the cam follower ( It will be noted that this can be achieved by moving 18). Similarly, shortening the operating time range will be achieved by moving the cam follower 18 along a direction opposite to the rotating cam 12 while the cam 12 is in contact with the roll 24. I can. In other words, to extend or shorten the operating time range, the camshaft (10) rotating in a direction perpendicular to the camshaft axis (A) or against the rotating camshaft (10). This can be achieved by moving the follower 18.

Likewise, prolonging the time range of no actuation is to move the cam follower 18 in a direction opposite to the rotating cam 12 while the cam 12 is not in contact with the roll 24. It can be achieved by moving. Similarly, shortening the time span of non-operation is achieved by moving the cam follower 18 in the direction of the rotating cam 12 while the cam 12 is not in contact with the roll 24. Can be.

For example, by controlling the cam follower assembly according to any of the above-described manners, the valve opening and closing of the inlet and outlet valves as well as the injection timing of the fuel pump are, but are not limited to, engine load, fuel type, engine speed. , And can be adjusted depending on several parameters, including environmental influences such as temperature, height and humidity.

As the actuator 22 can displace the cam follower 18 to any desired position between a fully extended position and a fully retracted position, the cam follower assembly 14 as illustratively disclosed herein. ) May help continuous control within the control range for the component. In addition, individual cam follower assemblies 14 may be individually controlled via individual actuators 22.

Although preferred embodiments of the present invention have been described herein, improvements and modifications may be made without departing from the scope of the following claims.

Claims (15)

A cam follower assembly (14) for controlling the operation of an internal combustion engine comprising a camshaft (10) rotatable around a camshaft axis (A), wherein the camshaft (10) includes at least one cam (12). As a cam follower assembly comprising:
A cam follower 18 configured to follow one cam 12;
A support shaft 23 pivotable about a pivot axis B spaced from the camshaft axis A;
A cam follower support (20) pivotably supported through a support shaft (23) around a pivot axis (B) and supports the cam follower (18);
At least one guide pin (26, 28) interposed between the cam follower (18) and the cam follower support (20); And
Interposed between the cam follower 18 and the cam follower support 20, toward the cam follower support 20 or the cam follower support 20 in a direction perpendicular to the cam shaft axis A Comprising an actuator 22 configured to displace the cam follower 18 away from,
The cam follower support 20 supports the cam follower 18 through the at least one guide pin 26, 28, and the cam follower 18 is induced by the actuator 22. Cam follower assembly (14), guided on said at least one guide pin (26, 28) during displacement. delete The method of claim 1,
The cam follower assembly (14), wherein the actuator (22) is configured as a double acting hydraulic cylinder, or a single acting hydraulic cylinder having a spring-return. The method of claim 1,
The cam follower assembly (14), wherein the actuator (22) is configured as an electric actuator, or a pneumatic actuator. The method of claim 1,
The cam follower assembly (14), wherein the cam follower (18) is continuously displaceable through the actuator (22) between an extended position and a retracted position. The method of claim 1,
The cam follower assembly (14), wherein the actuator (22) is configured to move the cam follower (18) at a translational speed substantially corresponding to the rotational speed of the camshaft (10) during operation. The method of claim 1,
The actuator 22 is configured to displace the cam follower 18 between an extended position and a retracted position, and the retracted position is spaced within a range of 2 mm to 40 mm from the extended position. , Cam follower assembly (14). The method of claim 1,
The cam follower assembly (14), wherein the cam follower (18) is configured to support a valve actuation elevation (16) for controlling the opening and closing of the valve. The method of claim 8,
The cam follower assembly (14), wherein the valve controlled by the cam follower (18) is configured as an inlet valve, an outlet valve, or a gas valve. The method of claim 1,
The cam follower assembly (14), wherein the cam follower (18) is configured to support a fuel pump operation lift (16") for controlling the injection timing of the fuel pump. A device (38) for controlling the operation of an internal combustion engine comprising a camshaft (10) rotatable around a camshaft axis (A), wherein the camshaft (10) comprises a plurality of cams (12). As (38):
A plurality of cam follower assemblies (14) according to any one of claims 1, 3 to 10, wherein each cam follower (18) of the plurality of cam follower assemblies (14) is The device 38, which drives one of a plurality of cams 12. The method of claim 11,
The cam follower support 20 of each of the cam follower assemblies 14 is pivotally supported by a support shaft 23 capable of being rotated around a pivot axis B, or
The device (38), wherein the cam follower support (20) of each cam follower assembly (14) is individually pivotable by means of a separate support shaft (23) which can be rotated about a pivot axis (B). A method for controlling the operation of an internal combustion engine comprising a camshaft 10 rotatable around a camshaft axis A, wherein the camshaft 10 has at least one cam 12 As a way to control the behavior:
Providing a cam follower assembly (14) according to any of the preceding claims;
Rotating the camshaft (10) around the camshaft axis (A); And
By displacing the cam follower 18 in a direction perpendicular to the camshaft axis A through the actuator 22, the motion rising part 16 supported by the cam follower 18 A method for controlling operation of an internal combustion engine comprising varying the operating time of a component being operated. The method of claim 13,
The step of changing the operating time of the component comprises advancing or delaying the operating time by displacing the cam follower 18 in a direction perpendicular to the camshaft axis A. , A method for controlling the operation of an internal combustion engine. The method of claim 13,
The step of varying the operating time of the component is the operating time by moving the cam follower (18) with or against rotating the camshaft in a direction perpendicular to the camshaft axis (A). A method for controlling operation of an internal combustion engine comprising the step of extending or shortening the range.

Images