Abstract
Self-cooled engine including a cylinder,a cylinder head and a turbo-piston which freely reciprocates inside the cylinder. The cylinder head has a valve that achieves circumferential suction of air-fuel mixture into the cylinder. The valve mechanism is closed and opened by cylindrical cam by means of cam shaft. Circumferential suction of air-fuel mixture enables the cylinder to cool itself and to burn the fuel at the energy center effectively. The force of incoming stream of air-fuel mixture rotates the impeller on the piston which acts as a fan to cool the cylinder walls. The impeller blades deflect the flame from reaching the cylinder walls and acts as a thermal barrier between the energy center and cylinder walls. The high intensity compression swirl (HICS) created at the end of the compression stroke to ensure that the fuel combustion is efficient and instantaneous release of maximum energy.
Information
| Application ID | 201647014271 |
| Invention Field | MECHANICAL ENGINEERING |
| Date of Application | |
| Publication Number | 32/2016 |
Applicants
| Name | Address | Country | Nationality |
|---|
Specification
SELF COOLED ENGINE CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to U.S. Provisional Patent Application No. 61/882,529, filed September 25, 2013, which is incorporated herein by reference.
FIELD
[0002] The subject technology relates generally to the internal combustion engine that can be used
for transportation, power generation and industrial appliances and, more particularly, to generate
energy without the need for a complicated cooling system.
BACKGROUND
[0003] Combustion efficiency of an internal combustion engine mainly depends quality of air-fuel
mixture. Generating Swirl at the a) inlet manifold, b) cylinder head, c) top of the piston plays vital
role in achieving the good thermodynamic efficiency. Swirl is generated in different forms like
vortex, tumble flow, squish and turbulence. In spark ignition (SI) engines, swirling of the air-fuel
mixture is achieved during suction stroke called induction swirl which is generated in the induction
manifold or specially formed contours over the piston.
[0004] In compression ignition (CI) engines, swirling is achieved at the end of the compression
stroke which is called as compression swirl generated in the cylinder head. Spherical swirl
chambers are formed in the cylinder head where diesel fuel is injected. During the compression
stroke, the compressed air is forced into the spherical swirl chamber causing the injected fuel to mix
thoroughly to achieve effective combustion. The swirl caused by these techniques are local to the
small region of the cylinder or cylinder head which accomplish little improvement in fuel efficiency
while producing harmful emissions.
[0005] The heat loss to the cooling medium is more than useful work on the piston. More than a
third of the total heat of the consumed fuel is lost to the cooling medium and cooling system
accessories. The prior art efforts to prevent heat loss to the cooling medium have not yielded
favorable results.
[0006] IC engines suffer from a major pitfall that more than a third of heat generated is transferred
to the cylinder walls. During combustion process flame propagates abruptly in all directions and
conducts huge amount of heat to the cooling medium through the cylinder walls. Low heat rejection
(LHR) engines were developed during 1980s in which combustion chambers are coated with
zirconium based ceramics to prevent heat loss to the surroundings up to 7%. In gasoline engines,
use of ceramic materials results in overheating of the intake air, which leads to undesirable engine
knock at high load operations. Because of these reasons, the research on LHR engines has been
discontinued.
SUMMARY
[0007] In the context of aforementioned difficulties the present subject technology has been made to
provide a means for eliminating heat loss through the cylinder walls of an internal combustion
Engine(lOO). It also achieves efficient combustion of fuel so that emission due to incomplete
combustion is negligible.
[0008] The subject technology includes a Sunflower valve as an inlet valve operated by a cylindrical
cam topermit circumferential suction of air-fuel mixture into the cylinder, which acts as thermal
barrier between cylinder walls and energy center. Thus, substantial heat loss to the cooling medium
is prevented.
[0009] During the suction stroke, the air-fuel mixture swirls and sweeps away the heat from the
cylinder walls. Also the cylinder with a turbo-piston assemblyensures perfect air-fuel mixture for
ideal combustion. During the compression stroke, impeller blades aggravate the swirling motion to
generate high intensity compression swirl (HICS) at the.center of the cylinder. The high intensity
compression swirl ensures every fuel molecule is subjected to multiple collisions for the effective combustion process to enhance fuel efficiency.
[0010] High intensity compression swirl (HICS) can be a direct swirl or counter swirl depending on the type of fuel used.
[0011] One embodiment is directed to an engine including a cylinder head body comprising a Sunflower mechanism, an exhaust valve mechanism; and a reciprocating turbo-piston assembly movable through a stroke in the cylinder.
[0012] The cylinder head body comprises: an inlet manifold and an exhaust manifold are disposed on the cylindrical surface of the cylinder head body; a valve lock housing on the cylindrical surface of the cylinder head body to accommodate a Sunflower valve upper guide lock, a Sunflower valve lock, a Sunflower valve lower guide lock, Sunflower valve assembly cover and a cylindrical cam follower; a bracket provides bearing support for the camshaft and pushrod; an annular protrusion disposed on the outer cylindrical surface of the exhaust chamber to stop the Sunflower valve assembly movement along the cylinder axis; a recess below the said annular protrusion to receive Sunflower assembly circlip disposed on the outer cylindrical surface of the exhaust chamber to stop the Sunflower valve assembly movement along the cylinder axis; and threaded holes on the top surface of the cylinder head body to receive an injector and an igniter plug. [0013] The Sunflower valve mechanism or inlet valve mechanism disposed adjacent the inlet manifold comprises: a Sunflower valve upper guide having plurality of radial channels disposed concentrically with engine cylinder axis for guiding air-fuel mixture flow during the suction stroke, wherein said Sunflower valve upper guide is secured to cylinder head body to prevent the rotation about cylinder axis; a Sunflower valve lower guide has plurality of helical shaped, radial channels in line/with said Sunflower valve upper guide disposed concentrically with the engine cylinder axis for guiding the air-fuel mixture to the cylinder to generate circumferential swirl, wherein said Sunflower
valve lower guide is secured to cylinder head body to prevent the rotation about cylinder axis; a Sunflower valve has plurality of radial channels disposed concentrically with engine cylinder axis for permitting air-fuel mixture flow during the suction stroke, wherein said Sunflower valve is secured to cylindrical cam follower, said cylindrical cam follower to provide angular movement to said Sunflower valve; the cylindrical cam follower disposed on the top surface of the Sunflower valve lock to follow the cylindrical cam profile to impart angular movement to the Sunflower valve; an angular slot is formed on the Sunflower valve lock housing of the cylinder head body to guide the cylindrical cam follower in an angular path; and a helical spring disposed on Sunflower valve spring seats to keep the Sunflower valve in closed position.
[0014] The exhaust valve mechanism comprising exhaust valve cam, push rod, adjustable rocker arm and exhaust valve to expel burnt gases out of the cylinder.
[0015] The camshaft comprising an exhaust valve cam and a cylindrical cam are disposed on the cylindrical surface of the camshaft; an exhaust valve cam for imparting reciprocating motion to the push rod; and a cylindrical cam for imparting angular motion to the cylindrical cam follower and to the
Sunflower valve.
[0016] The turbo-piston assembly, comprising an impeller rotatably disposed on top surface of the piston, said impeller rotated by the force of intake air-fuel mixture about cylinder axis, wherein the impeller is secured to said piston to prevent movement along the cylinder axis; and a connecting rod to convert reciprocating motion to rotary motion.
[0017] In the embodiment Sunflower mechanism whereas Sunflower valve is rotatable about cylinder axis between Sunflower valve upper guide and Sunflower valve lower guide, and said Sunflower valve uncover the radial channels of Sunflower valve upper guide and Sunflower valve lower guide to permit the air-fuel mixture flow into the cylinder during suction stroke; and the Sunflower valve mechanism, wherein the radial, helical channels of a Sunflower valve lower guide
direct the air-fuel mixture flow into the cylinder circumferentially to generate circumferential swirl
within the cylinder; the circumferential swirl generated by the said Sunflower mechanism, cools the
walls of engine cylinder; the circumferential swirl generated by the said Sunflower mechanism,
prevents flame propagation to the walls of engine cylinder during power stroke.
[0018] The turbo-piston assembly moves upward during compression stroke, to cause high intensity
compression swirl at the energy center, the said high intensity compression swirl causes air-fuel
mixture to burn completely at the energy center.
[0019] Accordingly, among the objects of the subject technology are: the provision of an internal
combustion engine that eliminates heat lost to a cooling medium and exhaust gases which
subsequently eliminate the need for a cooling system for the cylinders of the internal combustion
engine. Another object of the subject technology is to improve the efficiency of fuel combustion
within the cylinder of an internal combustion engine.
[0020] It should be appreciated that the present technology can be implemented and utilized in
numerous ways, including without limitation as a process, an apparatus, a system, a device, a method
for applications now known and later developed. These and other unique features of the
technology disclosed herein will become more readily apparent from the following description and
the accompanying drawings.
DESCRIPTION OF DRAWINGS
[0021] So that those having ordinary skill in the art to which the disclosed technology appertains will
more readily understand how to make and use the same, reference may be had to the following
drawings.
[0022] Fig. 1 is a sectional view of an engine in accordance with the subject technology.
[0023] Fig. 2 is a cylinder head body showing the inlet and exhaust manifolds for the engine of Fig.
1.
[0024] Fig. 3 is a cylinder head body showing the Sunflower valve and exhaust valve mechanisms
for the engine of Fig. 1.
[0025] Fig. 4 is a bottom view of cylinder head assembly for the engine of Fig. 1
[0026] Fig. 5 is an enlarged view of the cam and followers with Sunflower upper guide lock and
Sunflower valve lock exposed for the engine of Fig. 1.
[0027] Fig. 6 is a cylindrical cam follower that moves in an angular slot to open and close the
Sunflower valve for the engine of Fig. 1.
[0028] Fig. 7 is a complete sectional view of cylinder head for the engine of Fig. 1.
[0029] Fig. 7A is enlarged view of Sunflower valve assembly stopper, exhaust valve seat and recess
to receive Sunflower valve assembly circlip.
[0030] Fig. 8 is an exploded view of Sunflower valve mechanism for the engine of Fig. 1.
[0031] Fig. 9 is serrations on the valve locks which mate with the Sunflower valve and Sunflower
valve guides for the engine of Fig. 1.
[0032] Fig. 10 illustrates important dimensions of the Sunflower valve and the impeller for the
engine of Fig. 1.
[0033] Fig. 11 is a Sunflower valve mechanism in the closed position for the engine of Fig. 1.
[0034] Fig. 12 is a Sunflower valve mechanism in the open position for the engine of Fig. 1.
[0035] Fig. 13 is a sectional view of the cylinder head assembly along the flat surface of Sunflower
valve upper guide, showing cylindrical cam follower positions with respect to the camshaft axis for
the engine of Fig. 1.
[0036] Fig. 14 is an exploded view of the turbo-piston assembly for the engine of Fig. 1.
[0037] Fig. 15 is a sectional view of the turbo-piston for the engine of Fig. 1. .
[0038] Fig. 16 is an O-positive construction of connecting rod to withstand torsional-compressive
load for the engine of Fig. 1.
[0039] Fig. 17 is the engine during the suction stroke with arrows indicating air-fuel mixture flows through the intake manifold, suction chamber and Sunflower valve mechanism for the engine of Fig.
1.
[0040] Fig. 17A is the partly enlarged view of the Sunflower valve assembly showing air-fuel
mixture flow into the engine cylinder.
[0041] Fig. 18 is the engine during compression stroke with arrows at the energy center showing the
intensified swirl (HICS) as a result of compression for the engine of Fig. 1.
[0042] Fig. 19 is the engine during the power stroke for the engine of Fig. 1, which shows
combustion of gases as disk of fire at the energy center.
[0043] Fig. 20 is the engine during the exhaust stroke with arrows showing burnt gases leaving the
cylinder through exhaust manifold for the engine of Fig. 1.
[0044] Fig. 21 is a Direct swirl energy center (DSEC) with arrows at the energy center showing the
direction of the HICS being same to the circumferential swirl for the engine of Fig. 1.
[0045] Fig. 22 is a Counter swirl energy center (CSEC) with arrows at the energy center showing
the direction of HICS being opposite to the circumferential swirl for the engine of Fig. 1.
[0046] Fig. 23 is an exploded view of Sunflower valve mechanism without Sunflower valve guide
locks and Sunflower valve lock.
DESCRIPTION OF REFERENCE NUMERALS
1 ... Cylinder head assembly
2 ... Exhaust valve mechanism
3 ... Sunflower valve mechanism
4 ... Turbo-piston assembly
5 ... Rocker arm adjusting screw. 6... Rocker arm
7 ... Exhaust valve spring
8 ... Cylinder head body
8a.. Fastening studs and bolts for Engine cylinder and cylinder head assembly. 9... Stepped hole for Exhaust valve spring.
10 ... Cylinder axis
11 ... Exhaust valve
12 ... Exhaust manifold
13 ... Cam shaft
14 ... Cam shaft axis
15 ... Exhaust manifold axis
16 .... Exhaust valve seat
17 ... Sunflower valve upper guide
17a.. Sunflower valve upper guide radial channels.
18 ... Sunflower valve
18a.. Sunflower valve radial channels.
19 ... Sunflower valve lower guide.
19a.. Sunflower valve lower guide radial channels.
20 ... Impeller 20a.. Impeller shaft
21 ... Energy center
22 ... Piston
23 ... Connecting rod
24 ... Crankshaft
25 ... Igniter plug
26 ... Exhaust chamber
27 ... Suction chamber
28 ... Inlet manifold axis
29 ... Inlet manifold
30 ... Engine cylinder
31 ... Fuel injector
32 ... Push rod
33 ... Exhaust valve cam follower
34 ... Exhaust valve cam
35 ... Sunflower valve upper guide lock
36 ... Sunflower valve lock
37 ... Sunflower valve spring
38 ... Cylindrical cam
39 Cylindrical cam follower
39a ... Cylindrical cam follower axis.
39b ... Cylindrical cam follower at closed position
39c ... Cylindrical cam follower at mean position
39d ... Cylindrical cam follower at open position
39e .. . Cylindrical cam follower swing angle
40 ... Bracket for camshaft and pushrod bearing support
41... Slot for cylindrical cam follower angular movement
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42 ... Sunflower valve assembly stopper
43 ... Recess to receive Sunflower valve assembly circlip.
44 ... Stepped hole to receive exhaust valve seat
45 ... Sunflower valve assembly circlip
46 ... Sunflower valve lock housing
47 ... Rectangular groove for Sunflower valve angular play
48 ... Sunflower valve spring seat
49 ... Sunflower valve lower guide lock
50 ... Sunflower valve assembly cover
51 ... Serrations on valve locks
52 ... Cylindrical cam follower path
53 ... piston pin
54 ... Impeller circlip
55 ... Air fuel mixture flow in suction stroke
56 ... Circumferential swirl
57 High intensity compression swirl (HICS)
58 ... Combustion of gases
59 ... Exhaust valve open
60 ... Exhaust gas flow
61 .. .SF valve upper guide mating surface with valve lock housing
62 .. .SF valve lower guide mating surface with valve lock housing
63 .. .Valve lock housing mating surface with SF valve upper guide
64 .. .Valve lock housing mating surface with SF valve lower guide
Sunflower valve and impeller dimensions
D . ... Diameter of Sunflower valve
d .. .. Inner diameter of Sunflower valve
0 .... Port angle
Documents
| Name | Date |
| 201647014271.pdf | 2016-06-08 |
| 201647014271-Form 5-250416.pdf | 2016-07-19 |
| 201647014271-Form 3-250416.pdf | 2016-07-19 |
| 201647014271-Form 18-250416.pdf | 2016-07-19 |
| 201647014271-Other Patent Document-F1-F2-F3-F5-F18-PA-250416.pdf | 2016-07-19 |
| 201647014271-PETITION UNDER RULE 137 [19-09-2017(online)].pdf | 2017-09-19 |
| 201647014271-Form 1-250416.pdf | 2016-07-19 |
| 201647014271-Form 26-250416.pdf | 2016-07-19 |
| 201647014271-FORM 3 [19-09-2017(online)].pdf | 2017-09-19 |
| 201647014271-Changing Name-Nationality-Address For Service [19-09-2017(online)].pdf | 2017-09-19 |
| 201647014271-Form 2(Title Page)-250416.pdf | 2016-07-19 |
| Correspondence by Agent_PA-Assignment_26-09-2017.pdf | 2017-09-26 |
| 201647014271-RELEVANT DOCUMENTS [19-09-2017(online)].pdf | 2017-09-19 |
| 201647014271-FORM 3 [14-03-2018(online)].pdf | 2018-03-14 |
| 201647014271-AMENDED DOCUMENTS [19-09-2017(online)].pdf | 2017-09-19 |
| 201647014271-FER.pdf | 2019-08-05 |
| 201647014271-OTHERS [04-02-2020(online)].pdf | 2020-02-04 |
| 201647014271-FORM 3 [04-02-2020(online)].pdf | 2020-02-04 |
| 201647014271-FER_SER_REPLY [04-02-2020(online)].pdf | 2020-02-04 |
| 201647014271-CLAIMS [04-02-2020(online)].pdf | 2020-02-04 |
| 201647014271-COMPLETE SPECIFICATION [04-02-2020(online)].pdf | 2020-02-04 |
| 201647014271-ABSTRACT [04-02-2020(online)].pdf | 2020-02-04 |
| 201647014271-DRAWING [04-02-2020(online)].pdf | 2020-02-04 |
Orders
| Applicant | Section | Controller | Decision Date | URL |