US3842810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor
Assignee: Honda Motor Co Ltd
•
Filing: 1972-11-27
•
Granted: 1974-10-22
•
Expires: 1992-11-27
Abstract
Abstract A carburetor assembly is provided for an internal combustion engine having one or more cylinders each provided with an auxiliary chamber associated with each main combustion chamber, the chambers each being connected by a torch nozzle. A spark plug is associated with each auxiliary chamber. The carburetor assembly supplies a lean mixture to the main combustion chambers and a rich mixture to the auxiliary combustion chambers. The throttle valves which regulate the flow of lean mixture and rich mixture are interconnected by cam and follower mechanisms so that the quantity of air admitted into each chamber remains correct for optimum combustion over the full range of engine speeds from idle to full throttle. The carburetor assembly has a main primary passage and a main secondary passage both supplying lean mixture to the main combustion chambers. The carburetor assembly also has a single auxiliary passage supplying rich mixture to the auxiliary combustion chambers. The passages are arranged in a straight line with the auxiliary passage closest to the engine and with the main secondary passage positioned between the main primary passage and the auxiliary passage.
Inventors
- 👤 S Yagi
- 👤 M Atsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:00
CPC Classifications
F; F02; F02M; F02M13/00; F02M13/02; F02M13/04; F02M13/046; F02M11/00; F02M11/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
153 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage having a main throttle valve, an auxiliary passage having an auxiliary throttle valve, a supporting shaft for the auxiliary throttle valve, means for connecting the main primary passage to deliver a lean mixture to the main combustion chamber of the engine, means connecting the auxiliary passage to deliver a rich mixture to the auxiliary combustion chamber of the engine, a cam connected to turn in accordance with turning movement of the main throttle valve, a stationary member, a lever pivotally mounted on said stationary member and having a follower cooperating with said cam, and additional cam and follower means whereby turning movement of the auxiliary throttle valve is controlled by pivotAl movement of said lever.
Claim 2
Dependent Claim
153 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage having a main throttle valve, an auxiliary passage having an auxiliary throttle valve, a supporting shaft for the auxiliary throttle valve, means for connecting the main primary passage to deliver a lean mixture to the main combustion chamber of the engine, means connecting the auxiliary passage to deliver a rich mixture to the auxiliary combustion chamber of the engine, a cam connected to turn in accordance with turning movement of the main throttle valve, a stationary member, a lever pivotally mounted on said stationary member and having a follower cooperating with said cam, and additional cam and follower means whereby turning movement of the auxiliary throttle valve is controlled by pivotAl movement of said lever.
Claim 3
Dependent Claim
28 words
The combination as set forth in claim 1 in which the turning movement of the auxiliary throttle valve is always outside the projected area of its supporting shaft.
Claim 4
Dependent Claim
40 words
The combination set forth in claim 2 in which a first float chamber is provided for supplying fuel to said main primary passage and secondary passage, and a second float chamber is provided for supplying fuel to said auxiliary passage.
Claim 5
Dependent Claim
176 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage having a main throttle valve, an auxiliary passage having an auxiliary throttle valve, a supporting shaft for said auxiliary throttle valve, means for connecting the main primary passage to deliver a lean mixture to the main combustion chamber of the engine, means connecting the auxiliary passage to deliver a rich mixture to the auxiliary combustion chamber of the engine, means for varying the position of the auxiliary throttle valve so that the quantity of air delivered to the auxiliary combustion chamber is between 1 and 4 times the volume of the auxiliary combustion chamber, and means including cam mechanism for turning the auxiliary throttle valve in a predetermined manner with respect to turning movement of the main throttle valve, the range of turning movement of the auxiliary throttle valve being outside the projected area of its supporting shaft.
Claim 6
Dependent Claim
176 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage having a main throttle valve, an auxiliary passage having an auxiliary throttle valve, a supporting shaft for said auxiliary throttle valve, means for connecting the main primary passage to deliver a lean mixture to the main combustion chamber of the engine, means connecting the auxiliary passage to deliver a rich mixture to the auxiliary combustion chamber of the engine, means for varying the position of the auxiliary throttle valve so that the quantity of air delivered to the auxiliary combustion chamber is between 1 and 4 times the volume of the auxiliary combustion chamber, and means including cam mechanism for turning the auxiliary throttle valve in a predetermined manner with respect to turning movement of the main throttle valve, the range of turning movement of the auxiliary throttle valve being outside the projected area of its supporting shaft.
Claim 7
Dependent Claim
190 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage, a main throttle valve therein, a main secondary passage having a secondary throttle valve therein, an auxiliary passage having an auxiliary throttle valve therein, the passages being parallel and arranged in a straight line with the auxiliary passage nearest the engine, the main secondary passage being positioned between the auxiliary passage and the main primary passage, the main primary throttle valve and the main secondary throttle valve being positioned at a low elevation and the auxiliary throttle valve being positioned at a high elevation, a heat insulator having a projecting portion provided with a passage forming a continuation of the auxiliary passage, means in the insulator forming continuations of the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine and the auxiliary passage being adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine.
Claim 8
Dependent Claim
190 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage, a main throttle valve therein, a main secondary passage having a secondary throttle valve therein, an auxiliary passage having an auxiliary throttle valve therein, the passages being parallel and arranged in a straight line with the auxiliary passage nearest the engine, the main secondary passage being positioned between the auxiliary passage and the main primary passage, the main primary throttle valve and the main secondary throttle valve being positioned at a low elevation and the auxiliary throttle valve being positioned at a high elevation, a heat insulator having a projecting portion provided with a passage forming a continuation of the auxiliary passage, means in the insulator forming continuations of the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine and the auxiliary passage being adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine.
Claim 9
Dependent Claim
209 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main body having a member fixed thereunder, a main primary passage in the body and member and having a main throttle valve mounted in said member, a main secondary passage in said body and member and having a secondary throttle valve mounted in said member, an auxiliary passage in said body having an auxiliary throttle valve mounted in said body, the passages being parallel and arranged in a straight line with the auxiliary passage nearest the engine, the main secondary passage being positioned between the auxiliary passage and the main primary passage, a heat insulator fixed to a lower side of said member and having a projecting portion contacting said body, said projecting portion having a passage forming a continuation of the auxiliary passage, means in the insulator forming continuations of the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine and the auxiliary passage being adApted to deliver a rich mixture to the auxiliary combustion chamber of the engine.
Claim 10
Dependent Claim
209 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main body having a member fixed thereunder, a main primary passage in the body and member and having a main throttle valve mounted in said member, a main secondary passage in said body and member and having a secondary throttle valve mounted in said member, an auxiliary passage in said body having an auxiliary throttle valve mounted in said body, the passages being parallel and arranged in a straight line with the auxiliary passage nearest the engine, the main secondary passage being positioned between the auxiliary passage and the main primary passage, a heat insulator fixed to a lower side of said member and having a projecting portion contacting said body, said projecting portion having a passage forming a continuation of the auxiliary passage, means in the insulator forming continuations of the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine and the auxiliary passage being adApted to deliver a rich mixture to the auxiliary combustion chamber of the engine.
Claim 11
Dependent Claim
103 words
A carburetor assembly having a relatively large passage for supplying a lean mixture to main combustion chambers of an engine, the assembly having a relatively small passage for supplying a rich mixture to auxiliary combustion chambers of the engine, a main throttle valve in the large passage and an auxiliary throttle valve in the small passage, a supporting shaft for said auxiliary throttle valve, and means whereby turning movement of the main throttle valve acts to control turning movement of the auxiliary throttle valve, the range of turning movement of the auxiliary throttle valve being outside the projected area of its supporting shaft.
Claim 12
Dependent Claim
103 words
A carburetor assembly having a relatively large passage for supplying a lean mixture to main combustion chambers of an engine, the assembly having a relatively small passage for supplying a rich mixture to auxiliary combustion chambers of the engine, a main throttle valve in the large passage and an auxiliary throttle valve in the small passage, a supporting shaft for said auxiliary throttle valve, and means whereby turning movement of the main throttle valve acts to control turning movement of the auxiliary throttle valve, the range of turning movement of the auxiliary throttle valve being outside the projected area of its supporting shaft.
Claim 13
Dependent Claim
33 words
The combination set forth in claim 7 in which the quantity of air delivered to the auxiliary combustion chambers is between 1 and 4 times the combined volume of the auxiliary combustion chambers.
Claim 14
Dependent Claim
36 words
The combination set forth in claim 7 in which the carburetor assembly has a first float chamber for supplying fuel to the large passage and a second float chamber for supplying fuel to the small passage.
Claim 15
Dependent Claim
152 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage, a main throttle valve therein, a main secondary passage having a secondary throttle valve therein, an auxiliary passage having an auxiliary throttle valve therein, the passages being parallel, the main secondary passage being positioned between the auxiliary passage and the main primary passage, the main primary throttle valve and the main secondary throttle valve being positioned at a low elevation and the auxiliary throttle valve being positioned at a high elevation, the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine, and the auxiliary passage being adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine.
Claim 16
Dependent Claim
152 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage, a main throttle valve therein, a main secondary passage having a secondary throttle valve therein, an auxiliary passage having an auxiliary throttle valve therein, the passages being parallel, the main secondary passage being positioned between the auxiliary passage and the main primary passage, the main primary throttle valve and the main secondary throttle valve being positioned at a low elevation and the auxiliary throttle valve being positioned at a high elevation, the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine, and the auxiliary passage being adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine.
Claim 17
Dependent Claim
182 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage having a main throttle valve therein, a main secondary passage having a secondary throttle valve therein, an auxiliary passage having an auxiliary throttle valve therein, the passages being parallel, said throttle valves being mounted to turn about parallel axes, the main secondary passage being positioned between the auxiliary passage and the main primary passage, the main primary throttle valve and the main secondary throttle valve being positioned at a low elevation and the auxiliary throttle valve being positioned at a high elevation, the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine, the auxiliary passage being adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, and means whereby turning movement of the main throttle valve acts to control turning movement of the auxiliary throttle valve.
Claim 18
Dependent Claim
182 words
A carburetor assembly for use with an internal combustion engine having at least one main combustion chamber and an auxiliary combustion chamber connected thereto by a torch nozzle, said carburetor assembly having, in combination: a main primary passage having a main throttle valve therein, a main secondary passage having a secondary throttle valve therein, an auxiliary passage having an auxiliary throttle valve therein, the passages being parallel, said throttle valves being mounted to turn about parallel axes, the main secondary passage being positioned between the auxiliary passage and the main primary passage, the main primary throttle valve and the main secondary throttle valve being positioned at a low elevation and the auxiliary throttle valve being positioned at a high elevation, the main primary passage and the main secondary passage being adapted to deliver a lean mixture to the main combustion chamber of the engine, the auxiliary passage being adapted to deliver a rich mixture to the auxiliary combustion chamber of the engine, and means whereby turning movement of the main throttle valve acts to control turning movement of the auxiliary throttle valve.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |