EP4168663A1 - Bloc-cylindres d'un moteur à combustion interne - Google Patents

Bloc-cylindres d'un moteur à combustion interne

Info

Publication number
EP4168663A1
EP4168663A1 EP21731599.3A EP21731599A EP4168663A1 EP 4168663 A1 EP4168663 A1 EP 4168663A1 EP 21731599 A EP21731599 A EP 21731599A EP 4168663 A1 EP4168663 A1 EP 4168663A1
Authority
EP
European Patent Office
Prior art keywords
face
cylinder block
mounting boss
sensor mounting
internal combustion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21731599.3A
Other languages
German (de)
English (en)
Inventor
Balaji Vaidyanathan
Praveenkumar Arunkumar
Dharmapuri NAGENDRA KUMAR
Padmanabha PILLAI LOGANAYAKAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TVS Motor Co Ltd
Original Assignee
TVS Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TVS Motor Co Ltd filed Critical TVS Motor Co Ltd
Publication of EP4168663A1 publication Critical patent/EP4168663A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/04—Cylinders; Cylinder heads  having cooling means for air cooling
    • F02F1/06—Shape or arrangement of cooling fins; Finned cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles

Definitions

  • the present invention generally relates to a cylinder bock of an internal combustion engine, and more particularly to detection of knocking in internal combustion engines.
  • a sensor - known as a knock sensor - is used to detect such knocking in the ICE.
  • the knock sensor is mounted on a predetermined part of the ICE.
  • ECU Electronic Control Unit
  • a running engine inherently produces loud sounds, has high vibrations and heats up to high temperatures.
  • knocks generated in the ICE often go undetected. There have been several attempts made in the industry to solve the problems.
  • a water-cooled engine in which a knock sensor is fitted to a cylinder block.
  • a water-cooled engine needs a flow passage for coolant, i.e., a water jacket, to be provided in, for example, a cylinder block and a cylinder head. It also requires a pump to convey the coolant and a radiator to cool the coolant. For this reason, the structure of the water- cooled engine tends to be complicated.
  • the present invention is directed to a cylinder block of an internal combustion engine.
  • the cylinder block has a first face having an exhaust outlet; a second face extending perpendicular from the first face; a third face opposite to the first face and extending perpendicular from the second face, the third face having an intake aperture; a fourth face, opposite to the second face and extending perpendicular from the third face and thereby meeting the first face.
  • the fourth face defines two corners.
  • the cylinder block has a sensor mounting boss formed on at least one corner of the two corners of the fourth face.
  • the cylinder block has a timing chain placed adjacent to the second face.
  • the sensor mounting boss is formed on a corner between the first face and the fourth face, or on a corner between the third face and the fourth face. Further, the sensor mounting boss extends between a first end inside the cylinder block and a second end. [Oil] In yet another embodiment of the invention, the sensor mounting boss receives a knock sensor.
  • the sensor mounting boss protrudes from the cylinder block and inclined at an angle of between 15° to 90° from an axial axis of the cylinder block.
  • the cylinder block has one or more cooling fins formed around an outer periphery of the cylinder block, the outer periphery defined by the first face, the second face, the third face and the fourth face.
  • the mounting boss is formed discontinuous from the cooling fins.
  • the cylinder block has at least one stud bolt for mounting the cylinder block on a crankcase wherein distance between the stud bolt and the first end of the mounting boss is between 0 mm to 15 mm.
  • the present invention is directed towards an internal combustion engine, whereby the internal combustion engine has a crankcase, whereby the crankcase houses a crankshaft.
  • the internal combustion engine further has a cylinder block mounted on the crankshaft.
  • the cylinder block has a first face having an exhaust outlet; a second face extending perpendicular from the first face, the second face having an adjacently placed timing chain; a third face opposite to the first face and extending perpendicular from the second face, the third face having an intake aperture; a fourth face, opposite to the second face and extending perpendicular from the third face and thereby meeting the first face.
  • the fourth face defines two corners.
  • the cylinder block has a sensor mounting boss formed on at least one corner of the two corners of the fourth face.
  • the sensor mounting boss is formed on a corner between the first face and the fourth face, or on a corner between the third face and the fourth face. Further, the sensor mounting boss extends between a first end inside the cylinder block and a second end.
  • the internal combustion engine further has a cylinder head, whereby the cylinder head is mounted above the cylinder block.
  • FIG. 1 shows an exemplary motor vehicle, in accordance with an embodiment of the invention.
  • Figure 2 shows an internal combustion engine in accordance with an embodiment of the invention.
  • Figure 3 shows an internal combustion engine in accordance with another embodiment of the invention.
  • Figure 4a shows an exploded view of the cylinder block in accordance with an embodiment of the invention.
  • Figure 4b shows the cylinder block along with a knock sensor in accordance with an embodiment of the invention.
  • Figure 5 shows a top view of the cylinder block along in accordance with an embodiment of the invention.
  • Figure 6 shows a cross-sectional view of the cylinder block in accordance with an embodiment of the invention.
  • Figure 7 shows a top view of the cylinder block along in accordance with an embodiment of the invention.
  • Figure 8 shows a comparative characteristic curve of Signal-to-Noise Ratio vs. the frequency of vibrations in accordance with an embodiment of the invention.
  • the present invention relates to detection of knocking in internal combustion engines.
  • the present invention discloses a cylinder block of an internal combustion engine.
  • FIG. 1 illustrates an exemplary motor vehicle, in accordance with an embodiment of the invention.
  • the motor vehicle 10 comprises an IC engine 12 that is vertically disposed.
  • the IC engine 12 is a single-cylinder type IC engine.
  • the two-wheeled vehicle 10 comprises a front wheel 14, a rear wheel 16, a frame member, a seat 18 and a fuel tank 20.
  • the frame member includes a head pipe 22, a main tube 24, a down tube (not shown), and seat rails (not shown).
  • the head pipe 22 supports a steering shaft (not shown) and two telescopic front suspensions 26 (only one shown) attached to the steering shaft through a lower bracket (not shown).
  • the two telescopic front suspensions 26 support the front wheel 14.
  • the upper portion of the front wheel 14 is covered by a front fender 28 mounted to the lower portion of the telescopic front suspension 26 at the end of the steering shaft.
  • a handlebar 30 is fixed to upper bracket not shown and can rotate to both sides.
  • a head light 32, a visor guard (not shown) and instrument cluster (not shown) is arranged on an upper portion of the head pipe 22.
  • the frame member comprises a down tube that may be located in front of the IC engine 12 and extends slantingly downward from head pipe 22.
  • the main tube 24 of the frame member is located above the IC engine 12 and extends rearward from head pipe 22.
  • the IC engine 12 is mounted at the front to the down tube and a rear of the IC engine 12 is mounted at the rear portion of the main tube 24.
  • the IC engine 12 is mounted vertically, with a cylinder block extending vertically above a crankcase.
  • the cylinder block is disposed rearwardly of the downtube.
  • the fuel tank 20 is mounted on the horizontal portion of the main tube 24.
  • Seat rails are joined to main tube 24 and extend rearward to support a seat assembly 18.
  • a rear swing arm 34 is connected to the frame member to swing vertically, and a rear wheel 16 is connected to rear end of the rear swing arm 34.
  • the rear swing arm 34 is supported by a mono rear suspension 36 (as illustrated in the present embodiment) or through two suspensions on either side of the motor vehicle 10.
  • a taillight unit (not shown) is disposed at the end of the motor vehicle 10 and at the rear of the seat assembly 18.
  • a grab rail (not shown) is also provided on the rear of the seat rails.
  • the rear wheel 16 arranged below seat 18 rotates by the driving force of the IC engine 12 transmitted through a chain drive (not shown) from the IC engine 12.
  • a rear fender 38 is disposed above the rear wheel 16.
  • FIG. 1 depicts a typical internal combustion engine 500 (ICE) of a two- wheeler vehicle in accordance with an embodiment of the present invention.
  • the ICE 500 typically has a crankcase 100, a cylinder block 200 and a cylinder head 300.
  • the crankcase 100 is essentially a housing which has a crankshaft.
  • the cylinder block 200 is mounted on the crankcase by stud bolts (not shown).
  • the cylinder block 200 has a bore in its center which houses a piston.
  • Cylinder head 300 sits above the cylinder block 200 forming a combustion chamber combustion of fuel occurs in order for the vehicle to move.
  • the cylinder block 200 also has an intake channel and an exhaust outlet.
  • the intake channel receives air / fuel mixture from fuel assembly of the vehicle.
  • the exhaust outlet lets out the combusted mixture.
  • the axially movable piston inside the bore of the cylinder block 200 is connected to the crankshaft by a connecting rod.
  • the crankshaft, the connecting rod and the piston are connected in a way that reciprocating motion of the piston causes rotational motion of the crankshaft.
  • the ICE 500 also comprises a knock sensor 410 in accordance with an embodiment of the present invention.
  • the knock sensor 410 is mounted at an intake side 440 of the cylinder block 200.
  • the intake side 440 of the cylinder block 200 is adjoining an intake pipe 450 extending towards the ICE 500 from a carburetor 430.
  • the ICE 500 receives an intake charge from the carburetor 430, while in another embodiment, the carburetor 430 can be replaced by a throttle body mounted with a electronic fuel injector (EFI).
  • EFI electronic fuel injector
  • FIG. 3 depicts a typical internal combustion engine 500 (ICE) of a two-wheeler vehicle in accordance with another embodiment of the present invention.
  • the knock sensor 410 is mounted at an exhaust side 480 of the cylinder block 200.
  • the exhaust side 480 of the cylinder block 200 is disposed at a side opposite to the side of the cylinder block 200 that adjoins the intake pipe 450 extending towards the ICE 500 from a throttle body 460.
  • the ICE 500 receives an intake charge from the throttle body 460 mounted with an electronic fuel injector (EFI) 470, while in another embodiment the throttle body 460 can be replaced by a carburetor.
  • EFI electronic fuel injector
  • the cylinder block 200 has a bore 250 made therethrough. The bore receives an axially movable piston (not shown).
  • the cylinder block 200 is a block having four faces. Accordingly, the cylinder block 200 has first face 210. Referring to Figure 5 and Figure 7, the first face 210 has an exhaust outlet 212. Thus, combusted mixture from the combustion chamber of the ICE is let out from the exhaust outlet 212.
  • the cylinder block 200 further has a second face 220.
  • the second face 220 extends perpendicular to the first face 210. As seen in Figure 4a, Figure 4b, Figure 5 and Figure 7, the second face 220 has an adjacently made slot 222.
  • the slot 232 receives a timing chain (chain) wherein the timing chain connects a cam shaft to a crank shaft.
  • the cylinder block 200 has a third face 230.
  • the third face 230 extends perpendicularly from the second face 220. Accordingly, the third face 230 is opposite to the first face 210. Further, the third face 230 has an intake aperture (not shown) made therethrough. As seen in Figure 4a and Figure 4b, the cylinder block 200 has an intake channel 232 which connects to the intake aperture on the third face 230 leading into the combustion chamber.
  • the cylinder block 200 has a fourth face 240 which extends perpendicularly from the third face 230 and meets the first face 210. The fourth face 240 thus is opposite to the second face 220 of the cylinder block 200.
  • the cylinder block 200 has a plurality of cooling fins 260.
  • the cooling fins 270 are formed around outer periphery of the cylinder block 200, wherein the outer periphery is defined by the first face 210, the second face 220, the third face 230 and the fourth face 240.
  • the cooling fins 270 are configured such that, when the vehicle is in motion, the cooling fins 270 direct incident air towards the cylinder block 200.
  • the cylinder block 200 further has apertures 270a, 270b, 270c, 270d to receive stud bolts.
  • the stud bolts are essentially mounting means used to mount the cylinder block 200 on the crankcase 100 of the engine 500. Since the stud bolts extend completely along length of the cylinder block 200 as shown in Figure 6, they provide an added stability to the cylinder block 200. Thus, there is least amount of vibrations experienced around the stud bolts when the vehicle is in motion.
  • the cylinder block 200 has a sensor mounting boss 400 formed on a corner between the first face 210 and the fourth face 240 of the cylinder block 200 or on a corner between the first face 210 and the fourth face 240 of the cylinder block 200.
  • the sensor mounting boss 400 extends from a first end 401, which is inside the cylinder block 200, to a second end 402 wherein the second end 402 extends away from the cylinder block 200.
  • the sensor mounting boss 400 is placed close to the stud bolt 270a. More particularly, as shown in Figure 6, distance ‘F’ between surface of the stud bolt 270a and the first end 410 of the sensor mounting boss 400 is 0 mm to 15 mm. [030] In another embodiment of the invention, as shown in Figure 4a, the sensor mounting boss 400 is essentially made discontinuous with at least one cooling fin present on the outer periphery of the cylinder block 200. Further, the sensor mounting boss 400 protrudes from the cylinder block 200 and is inclined at an angle of between 15° to 90° from an axial axis 280 of the cylinder block 200. [031] In a further embodiment of the invention, as shown in Figure 4a, the sensor mounting boss
  • the knock sensor 410 is mounted on the sensor mounting boss 400 by using a fixating means 420 such as nut, hots, screw etc.
  • Figure 8 is a comparative characteristic graph showing the signal-to- noise ratio at 5000 rpm detected by the knock sensor 410, over frequency of vibration in a cylinder block 200. Accordingly, solid line as seen in the figure represents signal-to-noise ratio as detected by the knock sensor 410 when the sensor mounting boss 400 is formed on a corner between the first face 210 and the fourth face 240 of the cylinder block 200. On the other hand, dotted line as seen in the figure represents signal-to-noise ratio as detected by the knock sensor 410 when the sensor mounting boss 400 is formed on a corner shared between the third face 230 and the fourth face 240 of the cylinder block 200.
  • the sensor mounting boss 400 is formed close to the stud bolts, stability of the sensor mounting boss 400 is higher.
  • the sensor mounting boss 400 and consequently the knock sensor 410 experience vibrations arising only from the combustion chamber and not due to the movement of the vehicle.
  • all vibrations sensed by the knock sensor 400 would pertain to the knocking in the combustion chamber 250 of the cylinder block 200.
  • this leads to higher signal-to-noise ratio detected by the knock sensor 410.
  • the sensor mounting boss 400 is made discontinuous with the cooling fins 260, it ensures sufficient air flow around the knock sensor 410. Due to the air flow, the knock sensor 410 is cooled and is not greatly affected by the excessive damaging heat generated by the combustion chamber. Furthermore, when the sensor mounting boss 400 is formed on the aforementioned positions, it offers better serviceability of the knock sensor 410 present therein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

La présente invention concerne la détection de cognement dans des moteurs à combustion interne. Par conséquent, la présente invention concerne un bloc-cylindres (200) qui comporte une première face (210) ayant une sortie d'échappement (212); une deuxième face (220) qui s'étend perpendiculairement à partir de la première face (210) et à côté de laquelle est placée une chaîne de distribution; une troisième face (230) opposée à la première face (210) et qui s'étend perpendiculairement à partir de la deuxième face (220); une quatrième face (240), opposée à la deuxième face (220) et qui s'étend perpendiculairement à partir de la troisième face (230) et rejoint ainsi la première face (210). Le bloc-cylindres comporte également un bossage de montage de capteur (400) formé sur au moins un coin des deux coins de la quatrième face (240).
EP21731599.3A 2020-06-17 2021-04-08 Bloc-cylindres d'un moteur à combustion interne Withdrawn EP4168663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041025488 2020-06-17
PCT/IN2021/050349 WO2021255746A1 (fr) 2020-06-17 2021-04-08 Bloc-cylindres d'un moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP4168663A1 true EP4168663A1 (fr) 2023-04-26

Family

ID=76375377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21731599.3A Withdrawn EP4168663A1 (fr) 2020-06-17 2021-04-08 Bloc-cylindres d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP4168663A1 (fr)
CN (1) CN115917135A (fr)
WO (1) WO2021255746A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007080653A1 (fr) * 2006-01-13 2007-07-19 Honda Motor Co., Ltd. Moteur a combustion interne pour vehicule
JP2016011587A (ja) * 2014-06-27 2016-01-21 本田技研工業株式会社 ユニットスイングエンジンにおけるノックセンサ取付け構造
CN209523814U (zh) * 2019-01-31 2019-10-22 江门市大长江集团有限公司 一种摩托车发动机气缸体的补强结构及摩托车的加强气缸体

Also Published As

Publication number Publication date
WO2021255746A1 (fr) 2021-12-23
CN115917135A (zh) 2023-04-04

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