WO2024074863A1

WO2024074863A1 - Preventing damage to car engine parts due to breakage of timing belt/chain

Info

Publication number: WO2024074863A1
Application number: PCT/IB2022/059384
Authority: WO
Inventors: Yaghoob BABAZADEH
Original assignee: Babazadeh Yaghoob
Priority date: 2022-10-02
Filing date: 2022-10-02
Publication date: 2024-04-11

Abstract

Disclosed herein is a valve mechanism for a cylinder head of an engine. The disclosed valve mechanism prevents damage to car engine parts due to breakage of timing belt/chain. The disclosed valve mechanism includes an engine valve, a spring washer, a hollow circular spacer, a taper bush, an adjusting shim, a valve cotter, a base holder, and a spring. when the cam exerts a downward force to a top surface of the adjusting shim and a piston of the engine collides to the head of the valve, the spring washer comes out from the lower circular groove of the valve and disengages from the stem of the valve and the valve and the valve cotter move upwardly inside the taper bush and fill a part of the gap and, to thereby, prevent damage to car engine parts.

Description

PREVENTING DAMAGE TO CAR ENGINE PARTS DUE TO BREAKAGE OF

TIMING BELT/CHAIN

TECHNICAL FIELD

[0001] The present disclosure generally relates to mechanical engineering. The present disclosure, particularly, relates to combustion engines and, more particularly, relates to a valve mechanism for preventing damage to engine parts when timing belt/chain breaks.

BACKGROUND ART

[0002] In a piston engine, either a timing belt (also called a cambelt) or a timing chain may be used to synchronize the rotation of the crankshaft and the camshaft. This synchronization may ensure that the engine’s valves open and close at the correct times in relation to the position of the pistons. The crankshaft drives the cam shaft via a timing belt/chain, which in turn actuates the intake and exhaust valves. These valves allow the engine to inhale air (or an air/fuel mixture) and exhale the exhaust gasses. When the timing belt/chain breaks or when the timing belt/chain is adjusted improperly, the synchronization between rotation of the crankshaft and the camshaft may be lost. In this situation, the piston may collide to one of the valves. The collision between the piston and one of the valves may damage and/or deform the valve or other car engine parts. Therefore, there is a need for a system that is able to prevent damage to the valve and other parts of the engine when the timing belt/chain breaks. SUMMARY OF THE DISCLOSURE

[0010] This summary is intended to provide an overview of the subject matter of the present disclosure, and is not intended to identify essential elements or key elements of the subject matter, nor is it intended to be used to determine the scope of the claimed implementations. The proper scope of the present disclosure may be ascertained from the claims set forth below in view of the detailed description below and the drawings.

[0011] According to one or more exemplary embodiments, the present disclosure is directed to a valve mechanism for a cylinder head of an engine. In an exemplary embodiment, the disclosed valve mechanism may include an engine valve, a spring washer, a hollow circular spacer, a taper bush, an adjusting shim, a valve cotter, a base holder, and a spring.

[0012] In an exemplary embodiment, the engine valve may include a stem, a head, a lower circular groove, and an upper circular groove. In an exemplary embodiment, the stem may be configured to be disposed slidably inside a valve guide of a cylinder head. In an exemplary embodiment, the head may be attached to the stem. In an exemplary embodiment, the lower circular groove may be on an outer surface of the stem. In an exemplary embodiment, the upper circular groove may be on the outer surface of the stem.

[0013] In an exemplary embodiment, the spring washer may be associated with the lower circular groove. In an exemplary embodiment, the spring washer may include a reduced ring shape. In an exemplary embodiment, the spring washer may be configured to be fitted in the lower circular groove and may be engaged with the stem of the valve. In an exemplary embodiment, the lower circular groove may be configured to receive the spring washer.

[0014] In an exemplary embodiment, the hollow circular spacer may include a circular hole. In an exemplary embodiment, the hollow circular spacer may be mounted on the stem of the engine valve. In an exemplary embodiment, the stem of the engine valve may be inserted into the circular hole of the hollow circular spacer. In an exemplary embodiment, the hollow circular spacer may be disposed onto the spring washer.

[0015] In an exemplary embodiment, the stem of the engine valve may be inserted into the taper bush. In an exemplary embodiment, the taper bush may be disposed onto the hollow circular spacer. In an exemplary embodiment, the adjusting shim may have a disc shape. In an exemplary embodiment, the adjusting shim may be disposed onto the taper bush. In an exemplary embodiment, the adjusting shim may be configured to be in contact with a cam of the engine.

[0016] In an exemplary embodiment, the adjusting shim may have a disc shape. In an exemplary embodiment, the adjusting shim may be disposed onto the taper bush. In an exemplary embodiment, the adjusting shim may be configured to be in contact with a cam of the engine. In an exemplary embodiment, the valve cotter may be associated with the upper circular groove.

[0017] In an exemplary embodiment, the valve cotter may be fitted in the upper circular groove. In an exemplary embodiment, the stem of the engine valve may be inserted into the valve cotter. In an exemplary embodiment, the valve cotter may be disposed between the outer surface of the stem and an inner surface of the taper bush.

[0018] In an exemplary embodiment, the base holder may have a cylindrical shape. In an exemplary embodiment, the base holder may include a bottom opening, a top opening, an inner chamber, and a circular head. In an exemplary embodiment, the bottom opening may be at a bottom end of the base holder. In an exemplary embodiment, the top opening may be at a top end of the base holder.

[0019] In an exemplary embodiment, the inner chamber may be between the top opening and the bottom opening. In an exemplary embodiment, the stem of the valve may be inserted into the bottom opening and the inner chamber. In an exemplary embodiment, the spring washer, the hollow circular spacer, the taper bush, the adjusting shim, and the valve cotter may be disposed inside the inner chamber. In an exemplary embodiment, the circular head may be at the top end of the base holder. In an exemplary embodiment, the spring may be configured to be disposed between a bottom surface of the circular head and a top surface of the cylinder head. In an exemplary embodiment, the spring may be configured to exert an upward force to the base holder.

[0020] In an exemplary embodiment, the taper bush and the adjusting shim may create a gap between a top surface of the stem of the valve and a bottom surface of the adjusting shim. In an exemplary embodiment, when the cam exerts a downward force to a top surface of the adjusting shim and a piston of the engine collides to the head of the valve with a force more than a threshold, the spring washer comes out from the lower circular groove and disengages from the stem of the valve and the valve and the valve cotter move upwardly inside the taper bush and fill a part of the gap.

[0021] In an exemplary embodiment, the taper bush may include an upper half and a lower half. In an exemplary embodiment, the upper half and the lower half of the taper bush may be configured to form the taper bush when the upper half is disposed onto the lower half. In an exemplary embodiment, the valve cotter may include a first half and a second half. In an exemplary embodiment, the first half and the second half of the valve cotter may be configured to form the valve cotter when the first half and the second half are disposed next to each other. In an exemplary embodiment, the valve cotter may include an inner semicircular edge. In an exemplary embodiment, the inner semicircular edge of the valve cotter may be configured to be fitted inside the upper circular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawing figures depict one or more implementations in accord with the present teachings, by way of example only, not by way of limitation. In the figures, like reference numerals refer to the same or similar elements.

[0023] FIG. 1 illustrates a perspective section view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0024] FIG. 2A illustrates a perspective half-section view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0025] FIG. 2B illustrates an exploded view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0026] FIG. 3 illustrates a cross section view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0027] FIG. 4 illustrates a perspective view of an engine valve, consistent with one or more exemplary embodiments of the present disclosure.

[0028] FIG. 5 illustrates a cross section view of a valve mechanism when an engine valve is disposed slidably inside a valve guide of a cylinder head, consistent with one or more exemplary embodiments of the present disclosure.

[0029] FIG. 6 illustrates a perspective view of a spring washer, consistent with one or more exemplary embodiments of the present disclosure.

[0030] FIG. 7 illustrates a top view of a spring washer, consistent with one or more exemplary embodiments of the present disclosure.

[0031] FIG. 8 illustrates a perspective view of a hollow circular spacer, consistent with one or more exemplary embodiments of the present disclosure. [0032] FIG. 9A illustrates a perspective view of a taper bush, consistent with one or more exemplary embodiments of the present disclosure.

[0033] FIG. 9B illustrates a taper bush, consistent with one or more exemplary embodiments of the present disclosure.

[0034] FIG. 9C illustrates a perspective section view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0035] FIG. 9D illustrates a perspective half-section view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0036] FIG. 9E illustrates a cross section view of a valve mechanism, consistent with one or more exemplary embodiments of the present disclosure.

[0037] FIG. 10 illustrates a perspective view of an adjusting shim, consistent with one or more exemplary embodiments of the present disclosure.

[0038] FIG. 11A illustrates a front section view of a valve cotter, consistent with one or more exemplary embodiments of the present disclosure.

[0039] FIG. 11B illustrates a top view of a valve cotter, consistent with one or more exemplary embodiments of the present disclosure.

[0040] FIG. 11C illustrates a perspective view of a first half of a valve cotter, consistent with one or more exemplary embodiments of the present disclosure.

[0041] FIG. 12A illustrates a perspective view of a base holder, consistent with one or more exemplary embodiments of the present disclosure.

[0042] FIG. 12B illustrates a section perspective view of a base holder, consistent with one or more exemplary embodiments of the present disclosure.

[0043] FIG. 12C illustrates a section front view of a base holder, consistent with one or more exemplary embodiments of the present disclosure. [0044] FIG. 13A illustrates a valve mechanism and a car engine parts in a normal function of the car engine, consistent with one or more exemplary embodiments of the present disclosure. [0045] FIG. 13B illustrates a valve mechanism and a car engine parts in a scenario in which a cam is locked due to the timing belt/chain breakage, consistent with one or more exemplary embodiments of the present disclosure.

DESCRIPTION OF EMBODIMENTS

[0046] In the following detailed description, numerous specific details are set forth by way of examples in order to provide a thorough understanding of the relevant teachings. However, it should be apparent that the present teachings may be practiced without such details. In other instances, well known methods, procedures, components, and/or circuitry have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present teachings.

[0047] The following detailed description is presented to enable a person skilled in the art to make and use the methods and devices disclosed in exemplary embodiments of the present disclosure. For purposes of explanation, specific nomenclature is set forth to provide a thorough understanding of the present disclosure. However, it will be apparent to one skilled in the art that these specific details are not required to practice the disclosed exemplary embodiments. Descriptions of specific exemplary embodiments are provided only as representative examples. Various modifications to the exemplary implementations will be readily apparent to one skilled in the art, and the general principles defined herein may be applied to other implementations and applications without departing from the scope of the present disclosure. The present disclosure is not intended to be limited to the implementations shown, but is to be accorded the widest possible scope consistent with the principles and features disclosed herein.

[0048] In an aspect, the present disclosure is directed to a valve mechanism for a car engine. The disclosed valve mechanism, by utilizing different parts thereof, creates a gap between the top end of the valve and the adjusting shim. When the timing belt breaks and the piston collides the bottom end of the piston, the top end of the valve moves inside the created gap and, therefore, does not heat the shim. In fact, the gap proves a facility for the valve to move inside the gap without collision to the shim. In this way, when the timing belt breaks, any damage to different parts of the car engine is prevented.

[0049] Furthermore, by changing the timing belt and arranging the camshaft at its proper position, the valve mechanism return to its normal position and the car engine can start and work normally. Therefore, the car engine can be rearranged to its proper arrangement simply with a low cost and in a short time without a need to a skilled mechanic.

[0050] Disclosed herein is a valve mechanism to prevent damage to car engine parts when the timing belt/chain breaks. FIG. 1 shows a perspective section view of a valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure. FIG. 2A shows a perspective half-section view of valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure. FIG. 2B shows an exploded view of valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure. FIG. 3 shows a cross section view of valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 1, FIG. 2A, and FIG. 3, in an exemplary embodiment, valve mechanism 100 may include an engine valve 101, a spring washer 102, a hollow circular spacer 103, a taper bush 104, an adjusting shim 105, a valve cotter 106, a base holder 107, and a spring 108.

[0051] FIG. 4 shows a perspective view of engine valve 101, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 1, FIG. 2A, FIG. 3, and FIG. 4, in an exemplary embodiment, engine valve 101 may include a stem 112 and a head 114. In an exemplary embodiment, head 114 of engine valve 101 may be attached to stem 112 of engine valve 101. In an exemplary embodiment, stem 112 of engine valve 101 may be disposed slidably inside a valve guide of a cylinder head. In an exemplary embodiment, when stem 112 of engine valve 101 is disposed slidably inside a valve guide of a cylinder head, it may mean that stem 112 of engine valve 101 is disposed inside the valve guide of the cylinder head in such a way that stem 112 of engine valve is able to move back and forth linearly inside the valve guide of the cylinder head. FIG. 5 shows a cross section view of valve mechanism 100 when engine valve 101 is disposed slidably inside a valve guide of a cylinder head 502, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, it may be understood that a cam 504 of the car engine may exert a downward force to valve mechanism 100 and, to thereby, may urge engine valve 101 to move downwardly inside the valve guide of cylinder head 502.

[0052] In an exemplary embodiment, engine valve 101 may further include a lower circular groove 116 and an upper circular groove 118. In an exemplary embodiment, lower circular groove 116 and upper circular groove 118 may be provided on an outer surface 1122 of stem 112. In an exemplary embodiment, spring washer 102 may be associated with lower circular groove 116. FIG. 6 shows a perspective view of spring washer 102, consistent with one or more exemplary embodiments of the present disclosure. FIG. 7 shows a top view of spring washer 102, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, spring washer 102 may have a reduced ring shape. In an exemplary embodiment, the reduced ring shape may refer to a shape that is similar to a ring which a part thereof is removed. In an exemplary embodiment, spring washer 102 may be configured to be fitted in lower circular groove 116 and, to thereby, be engaged with stem 112 of valve 101. In an exemplary embodiment, lower circular groove may be configured to receive spring washer 102.

[0053] FIG. 8 shows a perspective view of hollow circular spacer 103, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, hollow circular spacer 103 may include a circular hole 132. In an exemplary embodiment, hollow circular spacer 103 may be mounted on stem 112 of engine valve 101. In an exemplary embodiment, stem 112 of engine valve 101 may be inserted into circular hole 132 of hollow circular spacer 103 so that hollow circular spacer 103 is mounted on stem 112 of engine valve 101. In an exemplary embodiment, hollow circular spacer 103 may be disposed on spring washer 102.

[0054] FIG. 9A shows a perspective view of taper bush 104, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 1, FIG. 2A, and FIG. 3, in an exemplary embodiment, stem 112 of engine valve 101 may be inserted into taper bush 104. In an exemplary embodiment, taper bush 104 may be disposed onto hollow circular spacer 103. FIG. 9B shows taper bush 104, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 9B, in an exemplary embodiment, taper bush 104 may include an upper half 142 and a lower half 144. In an exemplary embodiment, upper half 142 may be disposed onto lower half 144 so that taper bush 104 may be formed. FIG. 9C shows a perspective section view of valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure. FIG. 9D illustrates a perspective halfsection view of valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure. FIG. 9E illustrates a cross section view of valve mechanism 100, consistent with one or more exemplary embodiments of the present disclosure.

[0055] FIG. 10 shows a perspective view of adjusting shim 105, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 10, in an exemplary embodiment, adjusting shim 105 may have a disc shape. In an exemplary embodiment, when a part has a disc shape, it may mean that the part is substantially a cylinder that has circular cross sections. In an exemplary embodiment, as shown in FIG. 1, FIG. 2A, and FIG. 3, adjusting shim 105 may be disposed onto taper bush 104. As shown in FIG. 5, in an exemplary embodiment, adjusting shim 105 may be configured to be in contact with cam 504 of the car engine. In an exemplary embodiment, when cam 504 rotates around a predefined axis, at some points, cam 504 may exert a downward force to a top surface 152 of adjusting shim 105 in a downward direction 542. In an exemplary embodiment, this downward force from cam 504 may urge stem 112 of engine valve 101 to move downwardly inside valve guide of cylinder head 502 in downward direction 542.

[0056] As shown in FIG. 2B, in an exemplary embodiment, valve cotter 106 may include a first half 162 and a second half 164. In an exemplary embodiment, first half 162 and second half 164 may be disposed next to each other so that valve cotter 106 may be formed. In an exemplary embodiment, first half 162 of valve cotter 106 and second half 164 of valve cotter 106 may be substantially similar in shape, size, and functionality. FIG. 11A shows a front section view of valve cotter 106, consistent with one or more exemplary embodiments of the present disclosure. FIG. 11B shows a top view of valve cotter 106, consistent with one or more exemplary embodiments of the present disclosure. FIG. 11C shows a perspective view of first half 162 of valve cotter 106, consistent with one or more exemplary embodiments of the present disclosure. As mentioned above, in an exemplary embodiment, first half 162 of valve cotter 106 and second half 164 of valve cotter 106 may be substantially similar in shape, size, and functionality.

[0057] In an exemplary embodiment, valve cotter 106 may be associated with upper circular groove 118. In an exemplary embodiment, valve cotter 106 may be fitted in upper circular groove 118. In an exemplary embodiment, valve cotter 116 may include an inner semicircular edge 162. In an exemplary embodiment, inner semicircular edge 162 of valve cotter 116 may be configured to be fitted in upper circular groove 118. As shown in FIG. 1, FIG. 2A, and FIG. 3, in an exemplary embodiment, stem 112 of engine valve 101 may be inserted into valve cotter 116. In an exemplary embodiment, valve cotter 116 may be disposed between outer surface 1122 of stem 112 and an inner surface 146 of taper bush 104. In an exemplary embodiment, valve cotter 116 may be disposed between outer surface 1122 of stem 112 and an inner surface 146 of taper bush 104 in such a way that valve cotter 116 is in direct contact with outer surface 1122 of stem 112 and inner surface 146 of taper bush 104. In an exemplary embodiment, stem 112 of engine valve 101, valve cotter 116, and taper bush 104 may be engaged to each other and interconnected with each other.

[0058] FIG. 12A shows a perspective view of base holder 107, consistent with one or more exemplary embodiments of the present disclosure. FIG. 12B shows a section perspective view of base holder 107, consistent with one or more exemplary embodiments of the present disclosure. FIG. 12C shows a section front view of base holder 107, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 12A, FIG. 12B, and FIG. 12C, in an exemplary embodiment, base holder 107 may include a bottom opening 172 at a bottom end 171 of base holder 107. In an exemplary embodiment, an inner diameter of bottom opening 172 may correspond to an outer diameter of stem 112 of engine valve 101. In an exemplary embodiment, base holder 107 may further include a top opening 174 at a bottom end 173 of base holder 107. In an exemplary embodiment, an inner diameter of top opening 174 may correspond to an outer diameter of adjusting shim 105.

[0059] In an exemplary embodiment, base holder 107 may further include an inner chamber 175 between bottom opening 172 and top opening 174. As shown in FIG. 1, FIG. 2A, and FIG. 3, in an exemplary embodiment, stem 112 of engine valve 101 may be inserted into bottom opening 172 and inner chamber 175. As further shown in FIG. 1, FIG. 2A, and FIG. 3, in an exemplary embodiment, spring washer 102, hollow circular spacer 103, taper bush 104, adjusting shim 105, and valve cotter 106 may be placed inside inner chamber 175 of base holder 107. In an exemplary embodiment, base holder 107 may further include a circular head 176. In an exemplary embodiment, circular head 176 may be at top end 173 of base holder 107.

[0060] As shown in FIG. 5, in an exemplary embodiment, spring 108 may be configured to be disposed between a bottom surface 1762 of circular head 176 and a top surface 522 of cylinder head 502. In an exemplary embodiment, spring 108 may be configured to exert an upward force to base holder 107. In an exemplary embodiment, the upward force may refer to a force in an upward direction 543. In an exemplary embodiment, this upward force may urge engine valve 101 to move upwardly inside valve guide of cylinder head 502. In an exemplary embodiment, in absence of downward force from cam 504 of the car engine to adjusting shim 105, engine valve 101 may move upwardly due to the upward force from spring 108. But in presence of downward force from cam 504 of the car engine to top surface 152 of adjusting shim 105 to base holder 107, downward force from cam 504 of the car engine to top surface 152 of adjusting shim 105 may be greater than the upward force from spring 108 to base holder 107 and, consequently, spring 108 may not be able to move engine valve 101 in upward direction 543.

[0061] As shown in FIG. 3, taper bush 104 and adjusting shim 105 may create a gap 300 between a top surface 1124 of stem 112 and a bottom surface 154 of adjusting shim 105. In an exemplary embodiment, when cam 504 exerts a downward force to top surface 152 of adjusting shim 105 and simultaneously a piston 506 of the car engine collides to head 114 of engine valve 101 with a force more than a threshold, spring washer 102 may come out from lower circular groove 116 and, to thereby, may disengage from stem 112 of engine valve 101. Then, engine valve 101 and valve cotter 106 may move upwardly inside taper bush 104 and fill a part of gap 300. In an exemplary embodiment, it may be understood that when piston 506 of the car engine collides to head 114 of engine valve 101 with a force more than a threshold, engine valve 101 may move inside gap 300 without colliding to any part of valve mechanism 100 and/or the car engine. Therefore, any damage to different parts of the car engine due to the collision of piston 506 to head 114 of engine valve 101 may be prevented.

[0062] FIG. 13A shows valve mechanism 100 and a car engine parts in a normal function of the car engine, consistent with one or more exemplary embodiments of the present disclosure. It may be understood that, when the timing belt/chain of the car engine breaks, cam 504 may be locked at a position when cam 504 is in contact with top surface 152 of adjusting shim 105. In this situation, spring 108 may not be able to move valve mechanism 100 upwardly. FIG. 13B shows valve mechanism 100 and a car engine parts in a scenario in which cam 504 is locked due to the timing belt/chain breakage, consistent with one or more exemplary embodiments of the present disclosure. As shown in FIG. 13B, when cam 504 is locked at its position, if piston 506 of the car engine collides to head 114 of engine valve 101, spring washer 102 may come out from lower circular groove 116 and, to thereby, may disengage from stem 112 of engine valve 101. Then, engine valve 101 and valve cotter 106 may move upwardly inside taper bush 104 and fill a part of gap 300. In this way, engine valve 101 may be able to freely move inside gap 300 and consequently, any damage to different parts of the car engine and/or valve mechanism 100 may be prevented.

[0063] As discussed above, a valve mechanism is disclosed that may prevent potential damages to car engine parts when the timing belt/chain breaks. In traditional car engines, in a case that the timing belt/chain breaks, when the piston moves upwardly, the piston may collide to the valve and, thereby, different engine parts, including the valve and the cylinder head, may experience significant damages. It may be understood that these damages are due to the fact that a cam from the cam shaft may be positioned above the valve so that the valve cannot move when the piston collides to the valve and, therefore, different engine parts may be damaged. [0064] By utilizing disclosed valve mechanism 100 of the present disclosure. If the timing belt/chain breaks, when piston 506 collides to head 114 of engine valve 101, engine valve 101 may move upwardly and, to thereby, prevent damage to different engine parts. In fact, gap 300 (an empty space between top surface 1124 of stem 112 and bottom surface 154 of adjusting shim 105) provides a space into which a top end of engine valve 101 may go.

[0065] In an exemplary embodiment, valve mechanism 100 may provide further significant benefits. In an exemplary embodiment, after that piston 506 collides to head 114 of engine valve 101 and engine valve 101 is displaced, by changing the broken the time belt/chain with a new timing belt/chain, the upward force from spring 108 may urge the top end of engine valve 101 to come out of gap 300 and, thereby, valve mechanism 100 may return to its initial position. In fact, when downward force from cam 504 to top surface 152 of adjusting shim 105 is removed, spring 108 moves base holder 107, spring washer 102, hollow circular spacer 103, taper bush 104, and adjusting shim 105 upwardly and, thereby, spring washer 102 may go back to lower circular groove 116 and valve mechanism 100 may return to its initial position.

[0066] When the timing belt/chain breaks and piston 506 collides to head 114 of engine valve

101 and engine valve 101 is displaced, the engine can no longer properly work until the broken belt is replaced with a new one and different parts of engine are set at their proper position. In traditional car engines, when the timing belt breaks, a skilled mechanic should change the broken timing belt and rearrange different parts of the engine so that the engine can continue its function. However, by utilizing disclosed valve mechanism 100, after breaking the timing belt, an operator just needs to set the camshaft at its proper position and change the timing belt. After that, spring 108 returns engine valve 101 to its proper position and, thereby, spring washer

102 goes back to lower circular groove 116 and other parts of valve mechanism 100 are also placed at their proper position so that the engine may be ready to start and work again. Hence, as discussed above, by utilizing valve mechanism 100, when the timing belt of an engine breaks, it does not damage to any part of the engine and also the engine can be rearranged to its normal arrangement simply with a low cost and in a short time without a need to a skilled mechanic.

[0067] While the foregoing has described what may be considered to be the best mode and/or other examples, it is understood that various modifications may be made therein and that the subject matter disclosed herein may be implemented in various forms and examples, and that the teachings may be applied in numerous applications, only some of which have been described herein. It is intended by the following claims to claim any and all applications, modifications and variations that fall within the true scope of the present teachings.

[0068] Unless otherwise stated, all measurements, values, ratings, positions, magnitudes, sizes, and other specifications that are set forth in this specification, including in the claims that follow, are approximate, not exact. They are intended to have a reasonable range that is consistent with the functions to which they relate and with what is customary in the art to which they pertain.

[0069] The scope of protection is limited solely by the claims that now follow. That scope is intended and should be interpreted to be as broad as is consistent with the ordinary meaning of the language that is used in the claims when interpreted in light of this specification and the prosecution history that follows and to encompass all structural and functional equivalents. Notwithstanding, none of the claims are intended to embrace subject matter that fails to satisfy the requirement of Sections 101, 102, or 103 of the Patent Act, nor should they be interpreted in such a way. Any unintended embracement of such subject matter is hereby disclaimed.

[0070] Except as stated immediately above, nothing that has been stated or illustrated is intended or should be interpreted to cause a dedication of any component, step, feature, object, benefit, advantage, or equivalent to the public, regardless of whether it is or is not recited in the claims.

[0071] It will be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective spaces of inquiry and study except where specific meanings have otherwise been set forth herein. Relational terms such as first and second and the like may be used solely to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by “a” or “an” does not, without further constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0072] The Abstract of the Disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it can be seen that various features are grouped together in various implementations. This is for purposes of streamlining the disclosure, and is not to be interpreted as reflecting an intention that the claimed implementations require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed implementation. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separately claimed subject matter. While various implementations have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more implementations and implementations are possible that are within the scope of the implementations. Although many possible combinations of features are shown in the accompanying figures and discussed in this detailed description, many other combinations of the disclosed features are possible. Any feature of any implementation may be used in combination with or substituted for any other feature or element in any other implementation unless specifically restricted. Therefore, it will be understood that any of the features shown and/or discussed in the present disclosure may be implemented together in any suitable combination. Accordingly, the implementations are not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.

Claims

What is claimed is:

1. A valve mechanism for a cylinder head of an engine, the valve mechanism comprising: an engine valve, the engine valve comprising: a stem, the stem configured to be disposed slidably inside a valve guide of a cylinder head; a head, the head attached to the stem; a lower circular groove on an outer surface of the stem; and an upper circular groove on the outer surface of the stem; a spring washer associated with the lower circular groove, the spring washer comprising a reduced ring shape, the spring washer configured to be fitted in the lower circular groove and, to thereby, be engaged with the stem of the engine valve, the lower circular groove configured to receive the spring washer; a hollow circular spacer, the hollow circular spacer comprising a circular hole, the hollow circular spacer mounted on the stem of the engine valve, the stem of the engine valve inserted into the circular hole of the hollow circular spacer, the hollow circular spacer disposed onto the spring washer; a taper bush, the stem of the engine valve inserted into the taper bush, the taper bush disposed onto the hollow circular spacer; an adjusting shim, the adjusting shim comprising a disc shape, the adjusting shim disposed onto the taper bush, a top surface of the adjusting shim configured to be in contact with a cam of the engine; a valve cotter associated with the upper circular groove, the valve cotter fitted in the upper circular groove, the stem of the engine valve inserted into the valve cotter, the valve cotter disposed between the outer surface of the stem and an inner surface of the taper bush; a base holder, the base holder comprising: a bottom opening at a bottom end of the base holder; a top opening at a top end of the base holder; an inner chamber between the top opening and the bottom opening, the stem of the engine valve inserted into the bottom opening and the inner chamber, the spring washer, the hollow circular spacer, the taper bush, the adjusting shim, and the valve cotter placed inside the inner chamber of the base holder; and a circular head at the top end of the base holder; and a spring, the spring configured to be disposed between a bottom surface of the circular head and a top surface of the cylinder head, the spring configured to exert an upward force to the base holder; wherein: the taper bush and the adjusting shim creates a gap between a top surface of the stem of the engine valve and a bottom surface of the adjusting shim; and when the cam exerts a downward force to the top surface of the adjusting shim and simultaneously a piston of the engine collides to the head of the engine valve with a force more than a threshold: the spring washer comes out from the lower circular groove and, to thereby, disengages from the stem of the engine valve; the engine valve and the valve cotter move upwardly inside the taper bush and fill a part of the gap; the taper bush comprises an upper half and a lower half; the upper half and the lower half are configured to form the taper bush when the upper half is disposed onto the lower half; the valve cotter comprises a first half and a second half; the first half and the second half are configured to form the valve cotter when the first half and the second half are disposed next to each other; the valve cotter comprises an inner semicircular edge; the inner semicircular edge is configured to be fitted inside the upper circular groove; an inner diameter of the bottom opening corresponds to an outer diameter of the stem of the engine valve; and an inner diameter of the top opening corresponds to an outer diameter of the adjusting shim. A valve mechanism for a cylinder head of an engine, the valve mechanism comprising: an engine valve, the engine valve comprising: a stem, the stem configured to be disposed slidably inside a valve guide of a cylinder head; a head, the head attached to the stem; a lower circular groove on an outer surface of the stem; and an upper circular groove on the outer surface of the stem; a spring washer associated with the lower circular groove, the spring washer comprising a reduced ring shape, the spring washer configured to be fitted in the lower circular groove and, to thereby, be engaged with the stem of the engine valve, the lower circular groove configured to receive the spring washer; a hollow circular spacer, the hollow circular spacer comprising a circular hole, the hollow circular spacer mounted on the stem of the engine valve, the stem of the engine valve inserted into the circular hole of the hollow circular spacer, the hollow circular spacer disposed onto the spring washer; a taper bush, the stem of the engine valve inserted into the taper bush, the taper bush disposed onto the hollow circular spacer; an adjusting shim, the adjusting shim comprising a disc shape, the adjusting shim disposed onto the taper bush, a top surface of the adjusting shim configured to be in contact with a cam of the engine; a valve cotter associated with the upper circular groove, the valve cotter fitted in the upper circular groove, the stem of the engine valve inserted into the valve cotter, the valve cotter disposed between the outer surface of the stem and an inner surface of the taper bush; a base holder, the base holder comprising: a bottom opening at a bottom end of the base holder; a top opening at a top end of the base holder; an inner chamber between the top opening and the bottom opening, the stem of the engine valve inserted into the bottom opening and the inner chamber, the spring washer, the hollow circular spacer, the taper bush, the adjusting shim, and the valve cotter placed inside the inner chamber of the base holder; and a circular head at the top end of the base holder; and a spring, the spring configured to be disposed between a bottom surface of the circular head and a top surface of the cylinder head, the spring configured to exert an upward force to the base holder; wherein: the taper bush and the adjusting shim creates a gap between a top surface of the stem of the engine valve and a bottom surface of the adjusting shim; and when the cam exerts a downward force to the top surface of the adjusting shim and simultaneously a piston of the engine collides to the head of the engine valve with a force more than a threshold: the spring washer comes out from the lower circular groove and, to thereby, disengages from the stem of the engine valve; and the engine valve and the valve cotter move upwardly inside the taper bush and fill a part of the gap.

3. The valve mechanism of claim 2, wherein: the taper bush comprises an upper half and a lower half; and the upper half and the lower half are configured to form the taper bush when the upper half is disposed onto the lower half.

4. The valve mechanism of claim 3, wherein: the valve cotter comprises a first half and a second half; and the first half and the second half are configured to form the valve cotter when the first half and the second half are disposed next to each other.

5. The valve mechanism of claim 4, wherein: the valve cotter comprises an inner semicircular edge; and the inner semicircular edge is configured to be fitted inside the upper circular groove.

6. The valve mechanism of claim 5, wherein an inner diameter of the bottom opening corresponds to an outer diameter of the stem of the engine valve.

7. The valve mechanism of claim 6, wherein an inner diameter of the top opening corresponds to an outer diameter of the adjusting shim.