A cylinder block for an internal combustion engine
The integration of a deflector in the cylinder block directs liquid flow into a long path, addressing inefficiencies in conventional cooling systems, enhancing cooling efficiency and engine performance.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- TVS MOTOR CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-30
AI Technical Summary
Conventional IC engines suffer from inefficient cooling due to a large volume of liquid not traversing a long flow path between the cylinder block and cylinder head, leading to stagnation, low velocity, and potential short circuits, which can cause engine malfunction and seizure.
A deflector is integrated into the cylinder block to deflect liquid flow into a long path, ensuring higher volumes traverse this path, preventing stagnation and maintaining high velocity, thereby enhancing cooling efficiency.
The deflector ensures efficient cooling of the cylinder block and cylinder head, improving engine performance and durability by preventing short circuits and maintaining high liquid velocity, resulting in improved fuel economy.
Smart Images
Figure IN2025050964_30072026_PF_FP_ABST
Abstract
Description
[0001] TITLE OF INVENTION
[0002] A CYLINDER BLOCK FOR AN INTERNAL COMBUSTION ENGINE
[0003] FIELD OF THE INVENTION
[0004]
[0001] The present invention relates to an internal combustion engine. More particularly, the present invention relates to a cylinder block for the internal combustion engine.
[0005] BACKGROUND OF THE INVENTION
[0006]
[0002] Internal Combustion (IC) engines generate a significant amount of heat during the combustion process, and if such heat is not effectively managed, it can lead to decreased efficiency, performance as well as damage to IC engine. For cooling IC engine, different techniques are used. In conventional IC engines, cylinder block and cylinder head are provided with passages / openings through which a liquid such as water is circulated for dissipation of the heat. The liquid from a liquid reservoir is pumped in the passage of the cylinder block by means of a feed pump. The liquid is circulated in the passage and flows to the cylinder head through one or more openings provided in the cylinder head prior to exiting from an exit region provided in the cylinder head. The liquid should ideally travel throughout the passage formed in the cylinder block prior to exiting from the exit region. No stagnation of the liquid should occur in the passage to ensure proper cooling of the cylinder block and the cylinder head. In other words, the liquid should not have zero velocity at any location in the passage as the same will lead to a short circuit of water which, in turn, might lead to several engine issues including malfunction and / or seizure of IC engine. Moreover, the liquid should have more velocity around higher temperature locations / areas such as around liner, spark plug and exhaust port of the internal combustion engine.
[0007]
[0003] However, in the existing art, an exit region for liquid in the cylinder head is provided near to an inlet for liquid in the cylinder block. Owing to orientation of the inlet in the cylinder block and the exit region in the cylinder head, a large volume ofthe liquid entering the cylinder block does not traverse a long flow path between the inlet of the cylinder block and a region of the cylinder block below the exit region formed in the cylinder head and exits the cylinder head after the traversing a shorter flow path between the inlet and the region of the cylinder block below the exit region formed in the cylinder head. Therefore, low volume of the liquid flows all around the passages in the cylinder block and the cylinder head. This causes inefficient cooling of cylinder block and associated critical components such as liner, piston etc. This also causes inefficient cooling of the cylinder head as low volume of liquid will reach the cylinder head. Also, owing to the low volume of liquid flowing throughout the passage in the cylinder block, flow velocity of the liquid is also less. As a result, stagnation of coolant may occur in the cylinder block which can cause short circuit of the liquid as evaporation will occur due to high temperature of the cylinder block and the cylinder head. This will lead to decrease in the performance of IC engine and if not addressed properly may lead to engine seizure, which is highly undesirable.
[0008]
[0004] In view of the foregoing, there is a need-felt to overcome at least the above-mentioned disadvantages of the prior art.
[0009] SUMMARY OF THE INVENTION
[0010]
[0005] In one aspect of the present invention, a cylinder block for an internal combustion engine is disclosed. The cylinder block comprises an inlet through which a liquid is received in the cylinder block and a passage for circulation of the liquid in the cylinder block. The cylinder block also comprises a cavity provided between the passage and the inlet and a deflector is adapted to fit into the cavity. The deflector is adapted to deflect the liquid received through the inlet to allow flow of at least a portion of the liquid in a first direction in the passage. The first direction is a direction wherein the liquid traverses a first distance defining a long liquid flow path in the passage. The at least a portion of the liquid flowing in the first direction is a first portion of the liquid.
[0011]
[0006] In an embodiment, the deflector is further configured to deflect liquid to allow a flow of a second portion of the liquid in a second direction. The second direction is adirection where the liquid traverses a second distance defining a short liquid flow path in the passage.
[0012]
[0007] In an embodiment, the deflector comprises at least a first portion, a second portion and a third portion which are integrally formed with each other. The second portion extends from the first portion along a length of the deflector and the third portion extends from the second portion along the length of the deflector.
[0013]
[0008] In an embodiment, the first portion is adapted to cover the cavity and a portion of the passage to prevent flow of fluid in a third direction. The third direction is a direction orthogonal to the first direction.
[0014]
[0009] In an embodiment, the second portion is adapted to detachably fit into the cavity and the third portion adapted to fit into the passage of the cylinder block to deflect flow of fluid.
[0015]
[0010] In an embodiment, the cavity is formed at a pre-defined gap from the inlet.
[0016]
[0011] In an embodiment, the passage is defined around a cylindrical portion defining a cylindrical bore of the cylinder block.
[0017]
[0012] In another aspect of the present invention, an internal combustion engine is disclosed. The internal combustion engine comprises a cylinder block and a cylinder head. The cylinder block comprises an inlet through which a liquid is received in the cylinder block and a passage for circulation of the liquid in the cylinder block. The cylinder block also comprises a cavity provided between the passage and the inlet and a deflector adapted to fit into the cavity. The deflector is configured to deflect the liquid received through the inlet to allow flow of at least a portion of the liquid in a first direction in the passage. The first direction is a direction wherein the liquid traverses a first distance defining a long liquid flow path in the passage. The cylinder head is arranged on the cylinder block and comprises one or more openings and an exit region. The one or more openings are fluidically connected to the passage of the cylinder block to receive the fluid from the passage of the cylinder block.
[0013] In an embodiment, the deflector is configured to the deflect liquid to allow flow of a first portion of the liquid in a first direction and a second portion of the liquid in a second direction. The first direction is a direction wherein the liquid traverses a first distance defining a long liquid flow path in the passage and the second direction is a direction wherein the liquid traverses a second distance defining a short liquid flow path in the passage
[0018] BRIEF DESCRIPTION OF THE DRAWINGS
[0019]
[0014] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
[0020] Figure 1 illustrates a perspective view of an internal combustion engine, in accordance with an embodiment of the present invention.
[0021] Figure 2 illustrates a perspective view of a cylinder block and a cylinder head with a deflector, in accordance with the embodiment of the present invention.
[0022] Figure 3 illustrates a perspective view of the cylinder block with the deflector, in accordance with the embodiment of the present invention.
[0023] Figure 4 illustrates a plan view of the cylinder block with the deflector, in accordance with the embodiment of the present invention.
[0024] Figure 5 illustrates a perspective sectional view of the cylinder block cut along line A-A in Figure 3, in accordance with the embodiment of the present invention.
[0025] Figure 6 illustrates a side sectional view of the cylinder block cut along line A-A in Figure 4, in accordance with the embodiment of the present invention.
[0026] Figure 7 illustrates a bottom perspective view of the cylinder head in accordance with an embodiment of the present.
[0027] Figure 8 illustrate side sectional views of the cylinder head and the cylinder block , in accordance with the embodiment of the present invention.Figure 9 illustrates a rear perspective view of the deflector, in accordance with the embodiment of the present invention.
[0028] Figure 10 illustrates a bottom perspective view of the deflector, in accordance with the embodiment of the present invention.
[0029] Figure 11 illustrates a sectional view of the cylinder block cut along line B-B in Figure 2, in accordance with the embodiment of the present invention.
[0030] Figure 12 illustrates a perspective side view of the cylinder head and the cylinder block in an assembled state, in accordance with the embodiment of the present invention.
[0031] Figure 13 illustrates a sectional view of the cylinder head and the cylinder block in an assembled state cut along line C-C in Figure 12, in accordance with the embodiment of the present invention.
[0032] DETAILED DESCRIPTION OF THE INVENTION
[0033]
[0015] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder.
[0034]
[0016] Figure 1 illustrates a perspective view of an internal combustion engine 100, in accordance with an embodiment of the present invention.
[0035]
[0017] As shown, the internal combustion engine 100 comprises a cylinder block 102 and a cylinder head 114. The cylinder head 114 is connected to an upper part of the cylinder block 102. The cylinder block 102 comprises at least one passage 106 (shown in Figure 2) through which a liquid is circulated to cool the cylinder block 102 and the cylinder head 114. The liquid is circulated by a cooling system comprising a liquid reservoir (not shown), a feed pump 120, a thermostat (not shown) and a radiator (not shown). The feed pump pumps the liquid in the passage 106 formed in cylinder block 102 which, thereafter, flows to the cylinder head 114 via one or more openings 116 provided in the cylinder head 114. The liquid exits from the cylinder head 114 via an exit region 112 provided in the cylinder head 114 and flows to the radiator via the thermostat. The liquid from the radiator reaches the liquid reservoir from where it isrecirculated to the passage 106 formed in the cylinder block 102. In a non-limiting example, the liquid is a coolant such as water. However, this should not be construed as limiting and other now known or later developed liquids for cooling the different component of the internal combustion engine 100 are well within the scope of the present invention.
[0036]
[0018] Figure 2 illustrates a perspective view of a cylinder block 102 and a cylinder head 114 with a deflector 110, in accordance with the embodiment of the present invention. Figure 3 illustrates a perspective view of the cylinder block 102 with the deflector 110, in accordance with the embodiment of the present invention. Figure 4 illustrates a plan view of the cylinder block 102, in accordance with the embodiment of the present invention. Figure 5 illustrates a perspective sectional view of the cylinder block cut along line A- A in Figure 4, in accordance with the embodiment of the present invention. Figure 6 illustrates a side sectional view of the cylinder block cut along line A-A in Figure 4, in accordance with the embodiment of the present invention.
[0037]
[0019] As shown, the cylinder block 102 comprises an inlet 104 through which the liquid is received in the cylinder block 102. The liquid is pumped from the liquid reservoir via the feed pump 120. The cylinder block 102 also comprises a passage 106 and a cavity 108. The passage (106) is defined around a cylindrical portion defining a cylinder bore (102a) of the cylinder block. The received liquid is circulated in the passage for cooling the cylinder block 102 and the cylinder head 114. The cavity 108 is provided between the inlet 104 and the passage 106. The cavity 108 is formed at a pre-defined gap G (shown in Figure 3 and Figure 4) from the inlet 104. The cavity 108 is adapted to receive a deflector 110. The deflector 110 is adapted to detachably fit into the cavity 108. The deflector 110 is adapted to deflect at least a portion of the received liquid in a first direction Fl . The passage formed in the cylinder block has a long liquid flow path and a short liquid flow path between the inlet of the cylinder block 102 and a region of the cylinder block (102) below an exit region 112 formed in the cylinder head.
[0020] In one embodiment, the entire liquid received through the inlet is deflected in the first direction Fl. In such an embodiment, the entire liquid received through the inlet traverses the long liquid flow path along the first direction Fl. The first direction Fl is a direction wherein the liquid traverses the long liquid flow path before reaching the region of the cylinder block (102) below the exit region 112 formed in the cylinder head. In this embodiment, the deflector does not allow flow of liquid in a second direction having the short liquid flow path and a third direction orthogonal to the first direction and the second direction.
[0038]
[0021] In another embodiment, the higher volume of the received liquid is deflected in the first direction Fl and remaining liquid i.e. less volume of liquid is deflected in a second direction F2. The liquid deflected in the first direction Fl is a first portion of the liquid and the liquid deflected in the second direction is the second portion of the liquid. As already stated, the second direction F2 is opposite the first direction Fl. In a non-limiting example, the first direction Fl is a clockwise direction and the second direction F2 is an anti-clockwise direction. The first direction Fl is a direction wherein the liquid traverses the long liquid flow path before reaching the region of the cylinder block (102) below the exit region 112 formed in the cylinder head and the second direction is a direction wherein the liquid traverses the short liquid flow path before reaching the region of the cylinder block 102 below the exit region 112 formed in the cylinder head. In this embodiment, the deflector does not allow flow of the received liquid in the third direction which is orthogonal to the first direction and the second direction.
[0039]
[0022] Owing to the presence of the deflector 110, the entire or higher volume of the liquid is deflected in the first direction and traverses the long liquid flow path along the first direction Fl . In other words, none or lower volume of the liquid is deflected in the second direction and traverses the short liquid flow path. The present invention, therefore, aims to prevent a short circuit of liquid in the longer flow path by allowing more liquid to flow in the first direction Fl than the second direction F2. This willprevent or minimize the chances of less velocity or short circuit of the liquid in the longer flow path, which in turn, results in efficient cooling of the cylinder block 102 and the cylinder head 114. The efficient cooling of the cylinder block 102 and the cylinder head 114 ensures optimum performance of the internal combustion engine. Figure 7 illustrates a bottom perspective view of a cylinder head 114 in accordance with an embodiment of the present. Figure 8 illustrate side sectional views of the cylinder head and the cylinder block , in accordance with the embodiment of the present invention.
[0040]
[0023] As shown, the cylinder head 114 comprises a plurality of openings 116 and the exit region 112. The one or more openings 116 are fluidically connected to the passage 106 of the cylinder block 102 such that the liquid flowing through the passage 106 enters into the one or more openings 116 of the cylinder head 114. The one or more openings 116 are spaced apart from each other and arranged in a manner which corresponds to a shape of the passage 106 in the cylinder block 102. For example, if the passage 106 in the cylinder block 102 is circular, the one or more openings 116 in the cylinder head 114 are arranged in a circular manner. The liquid which enters into the one or more openings 116 of the cylinder head 114 cools the cylinder head 114 and exits the cylinder head 114 via the exit region 112 provided in the cylinder head 114. As higher volume of the liquid traverses the longer flow path in the first direction Fl owing to the deflector 110, all the openings 116 provided in the cylinder head 114 receives the liquid to efficiently cool the cylinder head. The up arrows shown in Figure 3 indicates the flow of liquid from the passage 106 to the openings 116 in cylinder head 114. In a non-limiting example, there are eight openings 116 provided in the cylinder head 114 which are in fluid connection with the passage 106 formed in the cylinder block 102.
[0041]
[0024] Figure 9 illustrates a rear perspective view of the deflector 110, in accordance with the embodiment of the present invention. Figure 10 illustrates a bottomperspective view of the deflector 110, in accordance with the embodiment of the present invention.
[0042]
[0025] As shown, the deflector 110 comprises at least a first portion 110a, a second portion 110b and a third portion 110c. The first portion 110a, the second portion 110b and the third portion 110c are integrally formed with each other. The second portion 110b extends from the first portion 110a along a length L (shown in Figure 9) of the deflector 110 and the third portion 110c extends from the second portion 110b along the length L of the deflector 110.
[0043]
[0026] Figure 11 illustrates a sectional view of the cylinder block 102 cut along line B-B in Figure 2, in accordance with the embodiment of the present invention. As shown, the cavity 108 is adapted to receive the deflector 110. The cavity is formed at a pre-defined gap G from the inlet of the cylinder block 102.
[0044]
[0027] Figure 12 illustrates a perspective side view of the cylinder head 114 and the cylinder block 102 in an assembled state, in accordance with the embodiment of the present invention. Figure 13 illustrates a sectional view of the cylinder head 114 and the cylinder block 102 in an assembled state cut along line C-C in Figure 12, in accordance with the embodiment of the present invention.
[0045]
[0028] As shown, the first portion 110a is adapted to cover the cavity and a portion of the passage 106 to prevent flow of fluid in the third direction F3 (shown in Figure 3). The same can also be seen in Figure 4. The second portion 110b is adapted to detachably fit into the cavity 108. The third portion 110c is adapted to fit into the passage 106 to deflect the flow of the liquid. The same can also be seen Figure 5 and Figure 6. In one embodiment, the third portion 110c deflects the liquid received only in the first direction Fl. In another embodiment, the third portion deflects the liquid received in the first direction Fl as well as the second direction F2 as shown in Figure 3.
[0046]
[0029] The claimed features / method steps of the present invention as discussed above are not routine, conventional, or well understood in the art, as the claimed features / steps enable the following solutions to the existing problems in conventional technologies.Specifically, the technical problem of inefficient cooling of the cylinder block and the cylinder head is solved by the present invention.
[0047]
[0030] In the present invention, a deflector is used to deflect entire liquid or high volume of liquid in the first direction such that entire liquid or high volume of liquid circulates the long liquid flow path for efficient cooling of the cylinder block and the cylinder head. Owing to circulation of the entire or high volume of the liquid in the long liquid flow path, velocity of liquid at any location in the passage is high and the issue such as short circuit or low velocity of the liquid are eliminated. This leads to efficient cooling of the cylinder block as well as the cylinder head which, in turn, leads to optimum performance of the internal combustion engine.
[0048]
[0031] The present invention increases the cooling efficiency and durability of critical engine parts such as piston, piston rings, liner, valve, and valve seats provided in vicinity of the cylinder block and the cylinder head.
[0049]
[0032] The present invention also leads to efficient heat absorption by flowing the entire or high volume of the liquid in the first direction which is close to the intake side of the internal combustion engine and thereafter to the exit region which is close to the exhaust side of the internal combustion engine.
[0050]
[0033] The present invention leads to improved cooling of the internal combustion engine which, in turn, results in improved fuel economy.
[0051]
[0034] The deflector of the present invention as well as cylinder block with the cavity are easy to manufacture. The present invention is capable of being installed in already existing internal combustion engines as well as new internal combustion engine.
[0052]
[0035] The present invention provides a simple, effective and cost-effective way to improve cooling of cylinder block, cylinder head and associated critical parts such as piston, liners etc.
[0053]
[0036] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes andmodification may be made without departing from the scope of the invention as defined in the following claims.List of Reference Numerals
[0054] 100- internal combustion engine 102- cylinder block
[0055] 102a- cylinder bore
[0056] 104- inlet
[0057] 106- passage
[0058] 108- cavity
[0059] 110- deflector
[0060] 110a- first portion
[0061] 110b- second portion
[0062] 110c- third portion
[0063] 112- exit region
[0064] 114- cylinder head
[0065] 116- openings in the cylinder head 120- feed pump
[0066] Fl- first direction
[0067] F2- second direction
[0068] F3- third direction
[0069] L- length of the deflector
[0070] G- pre-defined gap
Claims
WE CLAIM:
1. A cylinder block (102) for an internal combustion engine (100), the cylinder block (102) comprising:an inlet (104) through which a liquid is received in the cylinder block;a passage (106) for circulation of said liquid in the cylinder block (102); a cavity (108), the cavity being provided between the passage (106) and the inlet (104); anda deflector (110) adapted to detachably fit into the cavity (108), the deflector (110) being configured to deflect the liquid, received through the inlet (104), to allow flow of at least a portion of the liquid in a first direction (Fl) in the passage (106).
2. The cylinder block (102) as claimed in claim 1, wherein the first direction (Fl) being a direction wherein the liquid traverses a first distance defining a long liquid flow path in the passage (106).
3. The cylinder block (102) as claimed in claim 1, wherein the deflector (110) being configured to the deflect liquid to allow flow of a first portion of the liquid in the first direction (Fl) and a second portion of the liquid in a second direction (F2), the second direction (F2) being a direction wherein the liquid traverses a second distance defining a short liquid flow path in the passage.
4. The cylinder block (102) as claimed in claim 1, wherein the deflector (110) comprises at least a first portion (110a), a second portion (110b) and a third portion (110c) integrally formed with each other, and wherein the second portion (110b) extends from the first portion (110a) along a length of the deflector (110) and the third portion (110c) extends from the second portion (110b) along the length of the deflector (110).
5. The cylinder block (102) as claimed in claim 4, wherein the first portion (110a) being adapted to cover the cavity (108) and a portion of the passage to prevent flow of fluid in a third direction (F3), the third direction (F3) being a direction orthogonal to the first direction (Fl).
6. The cylinder block (102) as claimed in claim 4, wherein the second portion (110b) being adapted to detachably fit into the cavity (108) and the third portion (110c) adapted to fit into the passage (106) of the cylinder block (102) to deflect flow of fluid.
7. The cylinder block (102) as claimed in claim 1, wherein the cavity (108) being formed at a pre-defined gap (G) from the inlet (104).
8. The cylinder block (102) as claimed in claim 1, wherein the passage (106) is defined around a cylindrical portion defining a cylinder bore (102a) of the cylinder block.
9. An internal combustion engine (100) comprising:a cylinder block (102), the cylinder block (102) comprises an inlet (104) through which a liquid is received in the cylinder block; a passage (106) for circulation of said liquid in the cylinder block (102); a cavity (108), the cavity being provided between the passage (106) and the inlet (104); and a deflector (110) adapted to detachably fit into the cavity (108), the deflector (110) being configured to deflect the liquid, received through the inlet (104), to allow flow of at least a portion of the liquid in a first direction (Fl) in the passage (106); anda cylinder head (114) arranged on the cylinder block (102), the cylinder head (114) comprising one or more openings (116) and an exit region (112), the one or more openings (116) being fluidically connected to the passage(106) of the cylinder block (102) to receive the fluid from the passage (106) of the cylinder block (102).
10. The internal combustion engine (100) as claimed in claim 9, wherein the deflector (HO) being configured to the deflect liquid to allow flow of a first portion of the liquid in the first direction (Fl) and a second portion of the liquid in a second direction (F2), the first direction (Fl) being a direction wherein the liquid traverses a first distance defining a long liquid flow path in the passage (106), and the second direction (F2) being a direction wherein the liquid traverses a second distance defining a short liquid flow path in the passage.