Patent US3785355A successfully refreshed from Google Patents.
US3785355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine with internal charge dilution and method
Assignee: Motors Liquidation Co
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Filing: 1973-03-02
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Granted: 1974-01-15
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Expires: 1993-03-02
Abstract
Abstract In a preferred embodiment, a spark-ignited internal combustion engine is provided with a valved receiver chamber connected with the combustion chamber adjacent the spark plug. The receiver valve is open at peak combustion pressures to admit combustion chamber gases which are retained in the receiver until discharged to the combustion chamber after ignition of the charge on the following cycle. The arrangement and method provide substantial combustion chamber charge dilution for limiting nitrogen oxide emissions without adversely affecting ignition of the air-fuel mixture.
Inventors
- 👤 R Toepel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:52
CPC Classifications
F; F02; F02B; F02B47/00; F02B47/04; F02B47/08; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
An internal combustion engine comprising means defining a cylinder closed at one end, a piston movable in said cylinder and defining therewith a variable volume combustion chamber, means for admitting air and fuel to the combustion chamber, igniting the mixture and exhausting burned products from the combustion chamber, said admitting, igniting and exhausting means being operative in timed relation to the movement of the piston to cause repetitive performance of an operating cycle, including the steps of admission of air-fuel mixture to the combustion chamber, compression of the mixture, ignition and burning of the compressed mixture, expansion of the burned mixture with an output of power and exhaust of the burned gases from the combustion chamber, an enclosed receiver chamber in said cylinder-defining means adjacent and connecting with said combustion chamber, and means controlling communication between said combustion and receiver chambers, said controlling means being operative in timed relation with movement of the piston to permit such communication during portions of the various cycles substantially coincident with the burning process in the combustion chamber and to prevent communication during the remaining portions of the cycles.
Claim 2
Dependent Claim
185 words
An internal combustion engine comprising means defining a cylinder closed at one end, a piston movable in said cylinder and defining therewith a variable volume combustion chamber, means for admitting air and fuel to the combustion chamber, igniting the mixture and exhausting burned products from the combustion chamber, said admitting, igniting and exhausting means being operative in timed relation to the movement of the piston to cause repetitive performance of an operating cycle, including the steps of admission of air-fuel mixture to the combustion chamber, compression of the mixture, ignition and burning of the compressed mixture, expansion of the burned mixture with an output of power and exhaust of the burned gases from the combustion chamber, an enclosed receiver chamber in said cylinder-defining means adjacent and connecting with said combustion chamber, and means controlling communication between said combustion and receiver chambers, said controlling means being operative in timed relation with movement of the piston to permit such communication during portions of the various cycles substantially coincident with the burning process in the combustion chamber and to prevent communication during the remaining portions of the cycles.
Claim 3
Dependent Claim
176 words
An internal combustion engine comprising a housing defining a closed end cylinder, a piston reciprocably movable in said cylinder and defining therewith a variable volume combustion chamber at said cylinder closed End, inlet and exhaust ports connecting with said combustion chamber in said housing and valves controlling said ports, a closed receiver chamber in said housing, said receiver chamber being connected with said combustion chamber by an opening, a valve in said opening and openable to permit communication between said chambers, and spark ignition means in said housing and extending within said combustion chamber near said receiver chamber opening, said piston being sequentially movable through intake, compression, expansion and exhaust strokes and being operably interconnected with said valves and spark ignition means whereby said intake port valve is open during the intake stroke, said spark ignition means operates near the end of the compression stroke, said receiver valve is opened near the end of the compression stroke and closed near the beginning of the expansion stroke and said exhaust valve is open during the exhaust stroke.
Claim 4
Dependent Claim
176 words
An internal combustion engine comprising a housing defining a closed end cylinder, a piston reciprocably movable in said cylinder and defining therewith a variable volume combustion chamber at said cylinder closed End, inlet and exhaust ports connecting with said combustion chamber in said housing and valves controlling said ports, a closed receiver chamber in said housing, said receiver chamber being connected with said combustion chamber by an opening, a valve in said opening and openable to permit communication between said chambers, and spark ignition means in said housing and extending within said combustion chamber near said receiver chamber opening, said piston being sequentially movable through intake, compression, expansion and exhaust strokes and being operably interconnected with said valves and spark ignition means whereby said intake port valve is open during the intake stroke, said spark ignition means operates near the end of the compression stroke, said receiver valve is opened near the end of the compression stroke and closed near the beginning of the expansion stroke and said exhaust valve is open during the exhaust stroke.
Claim 5
Independent Claim
142 words
The method of operating an internal combustion engine for internal charge dilution, said method comprising admitting a charge of combustible air-fuel mixture to an enclosed combustion chamber, contracting the chamber to compress the mixture, igniting and burning the compressed mixture with a resultant increase in gas pressure within the chamber, opening communication of the combustion chamber with a receiver chamber early in the burning process to receive previously stored gases into the combustion chamber for dilution of the charge and subsequently closing off such communication near the end of the burning process at about the point of maximum gas pressure in the combustion chamber, thereby retaining a charge of burned gases for reintroduction to the combustion chamber on the subsequent cycle, expanding the gases in the combustion chamber with an output of power, and exhausting the burning gases from the combustion chamber.
Claim 6
Independent Claim
142 words
The method of operating an internal combustion engine for internal charge dilution, said method comprising admitting a charge of combustible air-fuel mixture to an enclosed combustion chamber, contracting the chamber to compress the mixture, igniting and burning the compressed mixture with a resultant increase in gas pressure within the chamber, opening communication of the combustion chamber with a receiver chamber early in the burning process to receive previously stored gases into the combustion chamber for dilution of the charge and subsequently closing off such communication near the end of the burning process at about the point of maximum gas pressure in the combustion chamber, thereby retaining a charge of burned gases for reintroduction to the combustion chamber on the subsequent cycle, expanding the gases in the combustion chamber with an output of power, and exhausting the burning gases from the combustion chamber.
Claim 7
Dependent Claim
19 words
The method of claim 3 and including the further step of cooling the gases stored in the receiver chamber.
References Cited (Backward Citations)
US2701556A
Cited
US3702111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |