US4446833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection apparatus for an internal combustion engine
Assignee: Yamaha Marine Co Ltd
•
Filing: 1982-12-03
•
Granted: 1984-05-08
•
Expires: 2002-12-03
Abstract
Abstract A fuel injection control method and system for a crankcase compression two cycle engine wherein the amount of fuel discharge is controlled by the pressure in the crankcase.
Inventors
- 👤 Yukio Matsushita
- 👤 Toshikatsu Nozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/10; F02D; F02D41/00; F02D41/30; F02D41/32; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02D2400/00; F02D2400/04
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
59 words
In a fuel injection control system for an internal combustion engine comprising a chamber in which an intake charge is compressed during engine operation and fuel injection means for delivering fuel to an air charge, the improvement comprising means for controlling the amount of fuel delivered by said fuel injection means in response to the pressure in said chamber.
Claim 2
Dependent Claim
59 words
In a fuel injection control system for an internal combustion engine comprising a chamber in which an intake charge is compressed during engine operation and fuel injection means for delivering fuel to an air charge, the improvement comprising means for controlling the amount of fuel delivered by said fuel injection means in response to the pressure in said chamber.
Claim 3
Dependent Claim
30 words
In a fuel injection control system as claimed in claim 1 wherein the controlling means is responsive to the maximum pressure in the chamber during a given cycle of operation.
Claim 4
Dependent Claim
37 words
In a fuel injection control system as claimed in claim 1 wherein the controlling means is responsive to the difference between the maximum pressure and the minimum pressure in the chamber during a given cycle of operation.
Claim 5
Dependent Claim
32 words
In a fuel injection control system as claimed in claim 1 wherein the controlling means is responsive to the excess pressure over atmospheric in the chamber during a given cycle of operation.
Claim 6
Dependent Claim
34 words
In a fuel injection control system as claimed in claim 1 wherein the controlling means is responsive to the area under a curve of pressure versus time of cycle of operation of the engine.
Claim 7
Dependent Claim
30 words
In a fuel injection control system as claimed in claim 1 wherein the chamber has a fuel/air charge in it and the pressure is the pressure of the fuel/air charge.
Claim 8
Dependent Claim
30 words
In a fuel injection control system as claimed in claim 6 wherein the controlling means is responsive to the maximum pressure in the chamber during a given cycle of operation.
Claim 9
Dependent Claim
37 words
In a fuel injection control system as claimed in claim 6 wherein the controlling means is responsive to the difference between the maximum pressure and the minimum pressure in the chamber during a given cycle of operation.
Claim 10
Dependent Claim
32 words
In a fuel injection control system as claimed in claim 6 wherein the controlling means is responsive to the excess pressure over atmospheric in the chamber during a given cycle of operation.
Claim 11
Dependent Claim
34 words
In a fuel injection control system as claimed in claim 6 wherein the controlling means is responsive to the area under a curve of pressure versus time of cycle of operation of the engine.
Claim 12
Dependent Claim
38 words
In a fuel injection control system as claimed in claim 1 wherein the chamber is a variable volume chamber that has its volume varying from a maximum to a minimum during a cycle of operation of the engine.
Claim 13
Dependent Claim
22 words
In a fuel injection control system as claimed in claim 11 wherein the variable volume chamber is a crankcase of the engine.
Claim 14
Dependent Claim
30 words
In a fuel injection control system as claimed in claim 12 wherein the controlling means is responsive to the maximum pressure in the chamber during a given cycle of operation.
Claim 15
Dependent Claim
37 words
In a fuel injection control system as claimed in claim 12 wherein the controlling means is responsive to the difference between the maximum pressure and the minimum pressure in the chamber during a given cycle of operation.
Claim 16
Dependent Claim
32 words
In a fuel injection control system as claimed in claim 12 wherein the controlling means is responsive to the excess pressure over atmospheric in the chamber during a given cycle of operation.
Claim 17
Dependent Claim
34 words
In a fuel injection control system as claimed in claim 12 wherein the controlling means is responsive to the area under a curve of pressure versus time of cycle of operation of the engine.
Claim 18
Dependent Claim
64 words
In a fuel injection control system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to said chamber, and a fuel injection means for delivering fuel, the improvement comprising means for controlling the amount of fuel delivered by said fuel injection means in response to a pressure that varies during a single cycle of engine operation.
Claim 19
Dependent Claim
64 words
In a fuel injection control system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to said chamber, and a fuel injection means for delivering fuel, the improvement comprising means for controlling the amount of fuel delivered by said fuel injection means in response to a pressure that varies during a single cycle of engine operation.
Claim 20
Dependent Claim
31 words
In a fuel injection control system as set forth in claim 17 wherein the controlling means is responsive to the maximum pressure in the chamber during a given cycle of operation.
Claim 21
Dependent Claim
37 words
In a fuel injection control system as claimed in claim 17 wherein the controlling means is responsive to the difference between the maximum pressure and the minimum pressure in the chamber during a given cycle of operation.
Claim 22
Dependent Claim
32 words
In a fuel injection control system as claimed in claim 17 wherein the controlling means is responsive to the excess pressure over atmospheric in the chamber during a given cycle of operation.
Claim 23
Dependent Claim
34 words
In a fuel injection control system as claimed in claim 17 wherein the controlling means is responsive to the area under a curve of pressure versus time of cycle of operation of the engine.
Claim 24
Dependent Claim
33 words
In a fuel injection control system as claimed in claim 17 wherein the controlling means is responsive to a pressure of the intake charge at a point other than in the induction system.
Claim 25
Dependent Claim
33 words
In a fuel injection control system as claimed in claim 17 wherein the fuel injection means injects fuel into the system upstream of the point where the control means responds to the pressure.
Claim 26
Dependent Claim
80 words
In a fuel injection control system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to said chamber, and a fuel injection means for delivering fuel to said induction system upstream of the point of discharge of said induction system into said chamber, the improvement comprising means for controlling the fuel delivered by said fuel injection means in response to a pressure downstream of the point of injection into said induction system.
Claim 27
Dependent Claim
80 words
In a fuel injection control system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to said chamber, and a fuel injection means for delivering fuel to said induction system upstream of the point of discharge of said induction system into said chamber, the improvement comprising means for controlling the fuel delivered by said fuel injection means in response to a pressure downstream of the point of injection into said induction system.
Claim 28
Dependent Claim
30 words
In a fuel injection control system as claimed in claim 24 wherein the controlling means is responsive to the maximum pressure in the chamber during a given cycle of operation.
Claim 29
Dependent Claim
37 words
In a fuel injection control system as claimed in claim 24 wherein the controlling means is responsive to the difference between the maximum pressure and the minimum pressure in the chamber during a given cycle of operation.
Claim 30
Dependent Claim
32 words
In a fuel injection control system as claimed in claim 24 wherein the controlling means is responsive to the excess pressure over atmospheric in the chamber during a given cycle of operation.
Claim 31
Dependent Claim
34 words
In a fuel injection control system as claimed in claim 24 wherein the controlling means is responsive to the area under a curve of pressure versus time of cycle of operation of the engine.
Claim 32
Independent Claim
65 words
A method of controlling a fuel injection system for an internal combustion engine comprising a chamber in which an intake charge is compressed during engine operation and fuel injection means for delivering fuel to an air charge comprising the steps of measuring the pressure in the chamber and controlling the amount of fuel delivered by the fuel injection means in response to the measured pressure.
Claim 33
Independent Claim
65 words
A method of controlling a fuel injection system for an internal combustion engine comprising a chamber in which an intake charge is compressed during engine operation and fuel injection means for delivering fuel to an air charge comprising the steps of measuring the pressure in the chamber and controlling the amount of fuel delivered by the fuel injection means in response to the measured pressure.
Claim 34
Independent Claim
65 words
A method of controlling a fuel injection system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to the chamber, and a fuel injection means for delivering fuel comprising the steps of measuring a pressure that varies during a single cycle of engine operation and controlling the amount of fuel discharged in response to the measured pressure.
Claim 35
Independent Claim
65 words
A method of controlling a fuel injection system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to the chamber, and a fuel injection means for delivering fuel comprising the steps of measuring a pressure that varies during a single cycle of engine operation and controlling the amount of fuel discharged in response to the measured pressure.
Claim 36
Independent Claim
89 words
A method of controlling a fuel injection system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to the chamber, and a fuel injection means for delivering fuel to the induction system upstream of the point of discharge of the induction system into the chamber comprising the steps of measuring the pressure downstream of the point of injection of the fuel injection means and controlling the amount of fuel discharged by the fuel injection means in response to the measured pressure.
Claim 37
Independent Claim
89 words
A method of controlling a fuel injection system for an internal combustion engine having a variable volume chamber, an induction system for delivering a charge to the chamber, and a fuel injection means for delivering fuel to the induction system upstream of the point of discharge of the induction system into the chamber comprising the steps of measuring the pressure downstream of the point of injection of the fuel injection means and controlling the amount of fuel discharged by the fuel injection means in response to the measured pressure.
Claim 38
Dependent Claim
88 words
In a fuel injection control system for an internal combustion engine comprising a variable volume chamber that has its volume varying from a maximum to a minimum during a cycle of operation of the engine and in which an intake charge is compressed during engine operation, the variable chamber is a crankcase of the engine and fuel injection means for delivering fuel to an air charge, the improvement comprising means for controlling the fuel delivered by said fuel injection means in response to the pressure in said chamber.
Claim 39
Dependent Claim
88 words
In a fuel injection control system for an internal combustion engine comprising a variable volume chamber that has its volume varying from a maximum to a minimum during a cycle of operation of the engine and in which an intake charge is compressed during engine operation, the variable chamber is a crankcase of the engine and fuel injection means for delivering fuel to an air charge, the improvement comprising means for controlling the fuel delivered by said fuel injection means in response to the pressure in said chamber.
Claim 40
Dependent Claim
30 words
In a fuel injection control system as claimed in claim 32 wherein the controlling means is responsive to the maximum pressure in the chamber during a given cycle of operation.
Claim 41
Dependent Claim
37 words
In a fuel injection control system as claimed in claim 32 wherein the controlling means is responsive to the difference between the maximum pressure and the minimum pressure in the chamber during a given cycle of operation.
Claim 42
Dependent Claim
32 words
In a fuel injection control system as claimed in claim 32 wherein the controlling means is responsive to the excess pressure over atmospheric in the chamber during a given cycle of operation.
Claim 43
Dependent Claim
34 words
In a fuel injection control system as claimed in claim 32 wherein the controlling means is responsive to the area under a curve of pressure versus time of cycle of operation of the engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |