# US 2018/0320636 A1 · Carbureted engine having an adjustable fuel to air ratio

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- Number: US 2018/0320636 A1
- Document ID: US20180320636A1
- Status: Published application
- Kind: A1
- Application number: 15/884,297
- Filed: 2018-01-30
- Published: 2018-11-08
- Earliest claimed: 2014-09-22
- Assignees: INI Power Systems, Inc.
- Applicants: INI Power Systems Inc.
- Inventors: Larry J. Markoski; Timothy C. Simmons
- Web page: https://patentgrep.com/patent/US20180320636A1

## CPC

- F02M 17/38: Controlling of carburettors, not otherwise provided for (external control gear F02M19/12)
- F01P 3/02: Arrangements for cooling cylinders or cylinder heads
- F01P 7/16: by thermostatic control
- F02B 63/04: for electric generators
- F02B 75/16: Engines characterised by number of cylinders, e.g. single-cylinder engines (F02B75/26 takes precedence)
- F02M 7/12: Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves (F02M7/24 takes precedence)
- F02M 17/34: Other carburettors combined or associated with other apparatus, e.g. air filters
- F02M 35/1017: {Small engines, e.g. for handheld tools, or model engines; Single cylinder engines}
- F02P 13/00: Sparking plugs structurally combined with other parts of internal-combustion engines ({connection of ignition coil to spark plug connector F02P3/02;} with fuel injectors F02M57/06 {; spark plug connector per se H01T13/04 – H01T13/06; predominant aspects of sparking plug, see H01T13/40 – H01T13/44})
- F02B 25/14: using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
- Y02T 10/30: Use of alternative fuels, e.g. biofuels
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A simple engine, comprises (1) a cylinder, and a spark plug in the cylinder; (2) a carburetor, fluidly connected to the cylinder; (3) a primary air intake path, fluidly connecting atmosphere to the carburetor; (4) a carburetor bypass air intake path, fluidly connecting air to the cylinder without passing through the carburetor; and (5) a valve, along the carburetor bypass air intake path, for controlling the flow of air through the carburetor bypass air intake path.

## Claims

### Claim 1

A simple engine, comprising:
(1) a cylinder, and a spark plug in the cylinder,
(2) a carburetor, fluidly connected to the cylinder,
(3) a primary air intake path, fluidly connecting atmosphere to the carburetor,
(4) a carburetor bypass air intake path, fluidly connecting air to the cylinder without passing through the carburetor, and
(5) a valve, along the carburetor bypass air intake path, for controlling the flow of air through the carburetor bypass air intake path.

### Claim 2 (depends on 1)

The simple engine of claim 1, wherein the engine further comprises an air filter, and
the carburetor bypass air intake path draws air through the air filter.

### Claim 3 (depends on 1)

The simple engine of claim 1, wherein the engine further comprises an air filter, and
both the primary air intake path, and the carburetor bypass air intake path, draw air through the air filter.

### Claim 4 (depends on 1)

The simple engine of claim 1, wherein the engine further comprising a gasket spacer, between the carburetor and the cylinder, and
the carburetor bypass air intake path feeds air into the gasket spacer.

### Claim 5 (depends on 4)

The simple engine of claim 4, wherein the gasket spacer comprises a metal.

### Claim 6 (depends on 4)

The simple engine of claim 4, wherein the gasket spacer comprises brass.

### Claim 7 (depends on 1)

A generator, comprising the simple engine of claim 1.

### Claim 8 (depends on 3)

A flexible fuel generator, comprising the simple engine of claim 3.

### Claim 9 (depends on 8)

The flexible fuel generator of claim 8, further comprising:
(6) a primary fuel tank, fluidly connected to the carburetor,
(7) a coolant path, which provide a flow path for coolant to cool the cylinder,
(8) a thermal controller, along the coolant path, and
(9) a start module, comprising a starting fuel tank holder and a starting fuel line, wherein the starting fuel line is fluidly connected to the primary air intake path or the carburetor bypass air intake path.

### Claim 10 (depends on 7)

The generator of claim 7, wherein the generator is a 1 kW, 2kW or 5 kW generator.

### Claim 11 (depends on 9)

The flexible fuel generator of claim 9, wherein the generator is air-cooled.

### Claim 12 (depends on 1)

The simple engine of claim 1, wherein the simple engine is part of a lawn mower; a leaf blower; a motor cycle without a fuel injector; a moped; an ATV; or a dirt bike.

### Claim 13 (depends on 9)

The flexible fuel generator of claim 9, wherein the cylinder comprises aluminum.

### Claim 14 (depends on 9)

The flexible fuel generator of claim 9, further comprising a generator housing enclosing the cylinder, wherein the start module is attached to the generator housing.

### Claim 15 (depends on 9)

The flexible fuel generator of claim 9, further comprising a starting fuel tank, fluidly connected to the starting fuel line.

### Claim 16 (depends on 15)

The flexible fuel generator of claim 15, further comprising a starting fuel dispenser, fluidly connecting the starting fuel tank to the starting fuel line.

### Claim at position 17

17-24. (canceled)

### Claim 25 (depends on 9)

The flexible fuel generator of claim 9, further comprising a generator housing enclosing the cylinder, wherein the start module is attached to the generator housing, and
wherein the generator is air-cooled,
the cylinder comprises aluminum,
the generator does not include a battery,
the start module further comprises a starting fuel enclosure,
the starting fuel line is connected to an air intake path between the air filter and the cylinder,
the coolant path has an entrance for air to enter the generator and an exit for air to exit the generator,
the thermal controller is a thermal door, and
the thermal door is at the exit of the coolant path.

### Claim 26

A method of running a simple engine, comprising:
supplying air and fuel to a carburetor, to produce an air fuel mixture,
supplying the air-fuel mixture to a cylinder,
supplying additional air to the cylinder, wherein the additional air does not go through the carburetor, and
igniting the fuel in the cylinder to drive the engine.

### Claim at position 20

27-31. (canceled)

### Claim 32

A simple engine, comprising:
(i) a cylinder, and a spark plug in the cylinder,
(ii) a carburetor, fluidly connected to the cylinder,
(iii) a primary air intake path, fluidly connecting atmosphere to the carburetor, and
(iv) a carburetor bypass, comprising
(a) an inlet tube, fluidly connecting to the air,
(b) a valve, fluidly connected to the inlet tube, and
(c) an outlet tube, fluidly connected to the cylinder,
wherein the carburetor bypass provides air to the cylinder bypassing the carburetor.

### Claim at position 22

33-37. (canceled)

### Claim 38

A method of making a modified engine from a simple engine, the simple engine having a cylinder, a spark plug in the cylinder, a carburetor fluidly connected to the cylinder, and a primary air intake path fluidly connecting air to the carburetor, the method comprising:
adding a carburetor bypass to the simple engine,
wherein the carburetor bypass comprises:
(a) an inlet tube, fluidly connecting to the air,
(b) a valve, fluidly connected to the inlet tube, and
(c) an outlet tube, fluidly connected to the cylinder, and
the carburetor bypass provides air to the cylinder bypassing the carburetor.

### Claim at position 24

39-46. (canceled)