GB2117447A - Tuned i c engine intake system - Google Patents
Tuned i c engine intake system Download PDFInfo
- Publication number
- GB2117447A GB2117447A GB08209089A GB8209089A GB2117447A GB 2117447 A GB2117447 A GB 2117447A GB 08209089 A GB08209089 A GB 08209089A GB 8209089 A GB8209089 A GB 8209089A GB 2117447 A GB2117447 A GB 2117447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air intake
- engine
- surge tank
- inertia
- intake manifold
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Classifications
-
- 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
- F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
- F02B27/005—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes
- F02B27/006—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes of intake runners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10026—Plenum chambers
- F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
The outlet passages 4 of the tuned air intake manifold S which are connected to the cylinder head inlets 3 spiral around the manifold chamber 6 in order to provide a compact arrangement. <IMAGE>
Description
SPECIFICATION
Inertia supercharger for internal combustion engines
Background of the invention
The invention relates to an improvement in an inertia supercharger for use in a multi-cylinder internal combustion engines.
In the multi-cylinder internal combustion engines such as diesel engines, there has heretofore been employed an inertia supercharger wherein the air intake ports of the engine are fitted with an air intake manifold and the dynamic effect or inertia of the air supplied through the air intake manifold is utilized to increase the amount of the air supplied into the cylinders thereof.
The length of the above-mentioned air intake manifold may depend on such factors as the cylinder volume, the timing of actuation of air intake and exhaust valves, the sectional area of the air intake manifold and the number of revolutions of the engine to be tuned with the operation of the supercharger and may be approximately obtained by the following formula:
where y is the frequency of the air supplied into the intake manifold; a is the velocity of the sound in the supplying air; Fpjp is the inner sectional area of the air intake manifold; Vh is the effective volume of the cylinder; and 4 is the length of the air intake manifold including the air intake ports.
In order to obtain a significant inertia effects, it is required to satisfy the following formula: Ne
6 Ne where Ne is the rotational speed of the engine and 05 is the effective opening angle of the air intake valve.
Regarding the inner sectional area of the air intake manifold Fpip, its proper range of values can be obtained by optimizing the mean velocity of the air supplied through the intake manifold at or around the tuned engine speed. The mean velocity of the air drawn through the intake manifold can be obtained by the following formula: Va S Nex Fpis
30 Fpip where Va is the mean velocity of the airflow through the intake manifold; S is the stroke of the piston; and
Fpis is the sectional area of the piston. In the vicinity of the number of revolutions of the engine to be tuned with the operation of the supercharger, the value of Va should preferably be 50 to 60 meters per second and the inner sectional area of the air intake manifold Fpjp is determined so that Va may be kept within such a range.Further, in order to prevent a decrease in the dynamic effect of the supplied air due to the resistance of air cleaner etc., it is necessary to provide a surge tank between each air intake manifold and the air cleaner.
An experimental result that the minimum required volume of the surge tank may correspond to the total exhaust volume of the engine was obtained.
If and when the inertia supercharger with the air intake manifold, the length of which is determined by the above-mentioned formula, is fitted to the air intake ports of the engine, its volumetric efficiency can be remarkably improved near the number of revolutions of the engine tuned with the supercharger as compared with those of air intake manifolds normally used thereby enabling a substantially improved supercharging efficiency to be obtained.Conventional inertia superchargers have been disadvantageous in that because air intake manifolds used therein are in the form of straight pipes and surge tanks are connected to the leading ends of the manifolds and hence the assemblies project considerably to the side of the engine thereby interfering sometimes with the installation of other machines and equipments and spaces for installing the inertia superchargers must be secured in advance.
In order to eliminate such disadvantages, a counter-measure was taken as a trial by using bent pipes as the air intake manifold. However, in the case of construction vehicles each having a comparatively low speed engine mounted thereon which requires an intake manifold longer than those of high speed engines, a difficulty has been encountered that even if the air intake manifold in the form of bent pipes are employed it contacts with the bonnet in some cases.
Summary ofthe invention
It is therefore an object of the present invention to provide an improved inertia supercharger which is compact in size yet is able to provide an efficient supercharging effect.
Another object of the present invention is to provide an inertia supercharger having a spiral intake manifold mounted along the inner periphery of a surge tank.
In accordance with an aspect of the present invention, there is provided an inertia supercharging apparatus for an internal combustion engine, comprising: a cylinder head of the engine, said cylinder head having formed therein a plurality of intake ports; a surge tank; and a plurality of spiral pipes each mounted along an inner periphery of said surge tank and having one end open within said surge tank and the other end protruding out of said surge tank and connected to the respective intake ports of said cylinder head.
The above and other objects, features and advantages of the present invention will be readily apparent from the following description taken in conjunction with the accompanying drawings.
Brief description of the drawings
Figure 1 is a perspective view of an inertia supercharger according to the present invention;
Figure 2 is a cross-sectional view thereof; and
Figure 3 is a diagram showing how the volume efficiency is changed in accordance with engine speed.
Description of the preferred embodiment
The present invention will now be described in detail below by way of example only with reference to the accompanying drawings.
In the drawings, reference numeral 1 denotes an internal combustion engine having, for example, four cylinders with its cylinder head 2 having four air intake ports 3 formed in one side face thereof. Connected to each air intake port 3 is the leading end of each air intake pipe 4. Reference numeral 5 indicates an inertia supercharger which comprises a barrel-shaped surge tank 6 capable of providing a damping volume and air intake pipes 4 wound around the inner periphery of the surge tank 6 as shown, one end of each pipe 4 opening into the surge tank 6. Each air intake pipe 4 extends around the inner periphery of the surge tank 6 and projects from the lower end thereof and then, its leading end is connected to each of air intake ports 3 formed in the cylinder head 2.
Referring to Figure 3, there is shown a comparison between the volumetric efficiency of an inertia supercharged engine of the present invention as the rotational speed of the engine is changed and that of the non-inertia supercharged engine under the same condition. It can be seen from this diagram that the inertia supercharged engine according to the present invention has a volumetric efficiency far superior to that of the non-inertia supercharged engine.
As mentioned in detail hereinabove, according to the present invention, the air intake pipes 4, each having one end opening into the surge tank 6, extend around the inner periphery of the surge tank and then project from the lower end thereof and the other end of each pipe 4 is connected to the respective air intake ports 3 formed in the engine's cylinder head.
Therefore the overall size of the supercharger can be reduced remarkably as compared with that of the conventional type supercharger wherein the air intake manifold is not mounted in the surge tank. For this reason, the supercharger can be fitted to the engine 1 without requiring a large space and also there is no possibility of occurrence of its contact with the bonnet upon installation. Further, because the required length of the air intake pipes can be secured by coiling them around the inner periphery of the surge tank 6, there is no risk of deteriorating the inertia supercharging efficiency in spite of the compact overall size thereof.
Claims (1)
1. An inertia supercharging apparatus for an internal combustion engine, comprising:
a cvlinder head of the engine, said cylinder head having formed therein a plurality of intake ports;
a surge tank; and
a plurality of spiral pipes each mounted along an inner periphery of said surge tank and having one end open within said surge tank and the other end protruding out of said surge tank and connected to the respective intake ports of said cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08209089A GB2117447B (en) | 1982-03-27 | 1982-03-27 | Tuned i c engine intake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08209089A GB2117447B (en) | 1982-03-27 | 1982-03-27 | Tuned i c engine intake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2117447A true GB2117447A (en) | 1983-10-12 |
| GB2117447B GB2117447B (en) | 1986-06-18 |
Family
ID=10529345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08209089A Expired GB2117447B (en) | 1982-03-27 | 1982-03-27 | Tuned i c engine intake system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2117447B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0177794A1 (en) * | 1984-10-10 | 1986-04-16 | Audi Ag | Inlet system for multi-cylinder engines |
| US4590895A (en) * | 1983-03-22 | 1986-05-27 | Mazda Motor Corporation | Intake passage for internal combustion engine |
| CN116392843A (en) * | 2023-06-07 | 2023-07-07 | 东营市和瑞化学科技有限公司 | Propylene glycol rectifying and purifying device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB769041A (en) * | 1954-05-06 | 1957-02-27 | Daimler Benz Ag | Improvements in induction pipes for internal combustion engines |
| GB1012425A (en) * | 1964-04-01 | 1965-12-08 | Alfa Romeo Spa | Resonance induction device for internal-combustion engines |
-
1982
- 1982-03-27 GB GB08209089A patent/GB2117447B/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB769041A (en) * | 1954-05-06 | 1957-02-27 | Daimler Benz Ag | Improvements in induction pipes for internal combustion engines |
| GB1012425A (en) * | 1964-04-01 | 1965-12-08 | Alfa Romeo Spa | Resonance induction device for internal-combustion engines |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4590895A (en) * | 1983-03-22 | 1986-05-27 | Mazda Motor Corporation | Intake passage for internal combustion engine |
| EP0177794A1 (en) * | 1984-10-10 | 1986-04-16 | Audi Ag | Inlet system for multi-cylinder engines |
| CN116392843A (en) * | 2023-06-07 | 2023-07-07 | 东营市和瑞化学科技有限公司 | Propylene glycol rectifying and purifying device |
| CN116392843B (en) * | 2023-06-07 | 2023-08-11 | 东营市和瑞化学科技有限公司 | Propylene glycol rectifying and purifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2117447B (en) | 1986-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |