Patent US601072A successfully refreshed from Google Patents.
Patent US4483301A successfully refreshed from Google Patents.
US4483301A
Expired / Lapsed
US
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Method and apparatus for controlling fuel injection in accordance with calculated basic amount
Assignee: Denso Corp
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Filing: 1982-09-01
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Granted: 1984-11-20
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Expires: 2002-09-01
Abstract
Abstract In the method and apparatus for controlling electronically the fuel injection in an internal combustion engine, an interruption routine of the main routine is performed. In the interruption routine, the control logic is selected in accordance with the value of the calculated basic width of the pulse for the fuel injection. The degree of increase or decrease of the amount of the fuel injection is regulated based on the selected control logic.
Inventors
- 👤 Yasuo Yamada
- 👤 Shiro Nagasawa
- 👤 Takao Niwa
- 👤 Takeshi Gouno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:18
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/263
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
A method for controlling electronically the fuel injection in an internal combustion engine comprising the steps of: obtaining operation values of a plurality of parameters representing engine running condition; calculating a basic width of a pulse for fuel injection on the basis of said obtained operation values; preliminarily dividing engine load range into at least a first load range indicative of a light load range and a second load range; preliminarily associating a first fuel range of values of said basic width with said first load range and a second fuel range of values of said basic width with said second load range; calculating an amount of decrease of fuel injection according to said basic width when said basic width is in said first fuel range; and carrying out decremental correction of said basic width using said calculated amount of decrease of fuel injection to lean the air-fuel mixture under light load conditions.
Claim 2
Independent Claim
153 words
A method for controlling electronically the fuel injection in an internal combustion engine comprising the steps of: obtaining operation values of a plurality of parameters representing engine running condition; calculating a basic width of a pulse for fuel injection on the basis of said obtained operation values; preliminarily dividing engine load range into at least a first load range indicative of a light load range and a second load range; preliminarily associating a first fuel range of values of said basic width with said first load range and a second fuel range of values of said basic width with said second load range; calculating an amount of decrease of fuel injection according to said basic width when said basic width is in said first fuel range; and carrying out decremental correction of said basic width using said calculated amount of decrease of fuel injection to lean the air-fuel mixture under light load conditions.
Claim 3
Dependent Claim
57 words
A method according to claim 1, further comprising the step of correcting the basic width using the signal from a sensor for detecting the constituents of engine exhaust gas when said basic width is in said second fuel range to cause the ratio of the air-fuel mixture supplied to the engine to approach the stoichiometric air-fuel ratio.
Claim 4
Independent Claim
165 words
A method for controlling electronically the fuel injection in an internal combustion engine comprising the steps of: obtaining operation values of a plurality of parameters representing engine running condition; calculating a basic width of a pulse for fuel injection on the basis of said obtained operation values; preliminarily dividing engine load range into at least light load range, a medium load range, and a heavy load range; preliminarily associating a first fuel range of values of said basic width with said light load range, a second fuel range of values of said basic width with said medium load range and a third fuel range of values of said basic width with said heavy load range; calculating an amount of decrease of fuel injection according to said basic width when said basic width is in said first fuel range; and carrying out decremental correction of said basic width usiing said calculated amount of decrease of fuel injection to lean the air-fuel mixture under light load conditions.
Claim 5
Independent Claim
165 words
A method for controlling electronically the fuel injection in an internal combustion engine comprising the steps of: obtaining operation values of a plurality of parameters representing engine running condition; calculating a basic width of a pulse for fuel injection on the basis of said obtained operation values; preliminarily dividing engine load range into at least light load range, a medium load range, and a heavy load range; preliminarily associating a first fuel range of values of said basic width with said light load range, a second fuel range of values of said basic width with said medium load range and a third fuel range of values of said basic width with said heavy load range; calculating an amount of decrease of fuel injection according to said basic width when said basic width is in said first fuel range; and carrying out decremental correction of said basic width usiing said calculated amount of decrease of fuel injection to lean the air-fuel mixture under light load conditions.
Claim 6
Dependent Claim
57 words
A method according to claim 3, further comprising the step of correcting the basic width using the signal from a sensor for detecting the constituents of engine exhaust gas when said basic width is in said second fuel range to cause the ratio of the air-fuel mixture supplied to the engine to approach the stoichiometric air-fuel ratio.
Claim 7
Dependent Claim
41 words
A method according to claim 4, wherein the change from said first fuel range to said second fuel range occurs at a different value of said basic width than the change from said second fuel range to said first fuel range.
Claim 8
Dependent Claim
29 words
A method according to claim 4, further comprising the step of increasing the basic width by a predetermined amount when the basic width is in the third fuel range.
Claim 9
Dependent Claim
100 words
Apparatus for controlling electronically the fuel injection in an internal combustion engine comprising: means for sensing parameters representing engine running condition and generating operational values related thereto; processing means for: (1) determining a basic width of a pulse for fuel injection on the basis of said operational values, and (2) decreasing said basic width when said basic width is in a predetermined fuel injection range related to a predetermined load range to lean the air-fuel mixture under light load conditions; and means, coupled to said processing means, for controlling fuel injection in response to the determination of said processing means.
Claim 10
Dependent Claim
100 words
Apparatus for controlling electronically the fuel injection in an internal combustion engine comprising: means for sensing parameters representing engine running condition and generating operational values related thereto; processing means for: (1) determining a basic width of a pulse for fuel injection on the basis of said operational values, and (2) decreasing said basic width when said basic width is in a predetermined fuel injection range related to a predetermined load range to lean the air-fuel mixture under light load conditions; and means, coupled to said processing means, for controlling fuel injection in response to the determination of said processing means.
Claim 11
Dependent Claim
63 words
The apparatus according to claim 7, wherein: said apparatus further comprises means, connected to said processing means, for sensing the constituents of engine exhaust gas; and said processing means also corrects said basic width when said basic width is in another predetermined fuel injection range to cause the ratio of the air-fuel mixture supplied to the engine to approach the stoichiometric air-fuel ratio.
Claim 12
Dependent Claim
120 words
Apparatus for controlling electronically the fuel injection in an internal combustion engine comprising: means for sensing parameters representing engine running condition and generating operational values related thereto; processing means for: (1) determining a basic width of a pulse for fuel injection on the basis of said operational values, and (2) decreasing said basic width when said basic width is in a predetermined fuel injection range related to a light load range to lean the air-fuel mixture under light load conditions, the load range for said engine including said light load range, a medium load range and a heavy load range; and means, coupled to said processing means, for controlling fuel injection in response to the determinations of said processing means.
Claim 13
Dependent Claim
120 words
Apparatus for controlling electronically the fuel injection in an internal combustion engine comprising: means for sensing parameters representing engine running condition and generating operational values related thereto; processing means for: (1) determining a basic width of a pulse for fuel injection on the basis of said operational values, and (2) decreasing said basic width when said basic width is in a predetermined fuel injection range related to a light load range to lean the air-fuel mixture under light load conditions, the load range for said engine including said light load range, a medium load range and a heavy load range; and means, coupled to said processing means, for controlling fuel injection in response to the determinations of said processing means.
Claim 14
Dependent Claim
69 words
The apparatus as in claim 9, wherein: said apparatus further comprises means, connected to said processing means, for sensing the constituents of engine exhaust gas; and said processing means also corrects said basic width when said basic width is in a second predetermined fuel range related to said medium load range to cause the ratio of the air-fuel mixture supplied to the engine to approach the stoichiometric air-fuel ratio.
Claim 15
Dependent Claim
34 words
The apparatus according to claim 10 wherein said processing means increases said basic width by a predetermined amount when said basic width is in a third fuel range related to said heavy load range.
Claim 16
Dependent Claim
46 words
The apparatus according to claim 10, wherein said processing means causes the change from said first fuel range to said second fuel range to occur at a different value of said basic width than the change from said second fuel range to said first fuel range.
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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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |