EP0120730A2
Expired / Lapsed
EP
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Fuel redistribution control for an internal combustion engine
Assignee: Honeywell International Inc
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Filing: 1984-02-15
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Granted: —
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Expires: 2004-02-15
Abstract
Abstract A fuel redistribution control for an internal combustion engine (12) having a fuel control computer (10) and fuel delivery means (14) for delivering fuel to the engine in response to electrical signals. A signal generator (16) generating first signals indicative of the incremental rotational velocity of the engine's output member resulting from the torque impulses imparted to the output member by the individual cylinders, averaging means (18) for generating from said first signal an average rotational velocity signal, a circuit (20) for generating a difference signal indicative of the difference between said first signals and said average rotational velocity signal, integrator means (22) for individually accumulating said difference signals to generate a correction signal for each cylinder, means for averaging said correction signal (26) to generate an average correction signal, means for summing (28) said correction signal with the base fuel quantity signals generated by the fuel control computerto generate intermediate fuel quantity signals, and means for summing (30) the correction signals to said intermediate fuel quantity signal to generate a corrected fuel quantity signal activating the fuel delivery means (14) to deliver a quantity of fuel to each cylinder tending to equalize the contribution of each cylinder to the total output torque of the engine.
Inventors
- 👤 Edwin Albert Johnson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1497; F02D41/1498; F02D41/30; F02D41/32; F02D41/36; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/1015; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
179 words
A fuel redistribution control system for an internal combustion engine (12) having at least two cylinders producing torque impulse rotating an output member, a fuel control computer (10) for generating base fuel quantity signals indicative of the quantity of fuel to be delivered to each cylinder in response to the operational parameters of the engine, and fuel delivery means (14) for delivering fuel to the engine cylinders in response to said base fuel quantity signals, said fuel redistribution control system characterized by: means (16) for sequentially generating first signals indicative of the rotational velocity of the output member resulting from each torque impulse imparted to the engine's output member by said at least two cylinders; and fuel redistribution means (18, 20, 22, 24, 26, 28, 30) for generating corrected fuel quantity signals in response to said first signals, said corrected fuel quantity signals redistributing the quantity of fuel being delivered by said fuel delivery means (14) to said at least two cylinders during each engine cycle, tending to equalize the torque impulse generated by said at least two cylinders.
Claim 2
Dependent Claim
179 words
A fuel redistribution control system for an internal combustion engine (12) having at least two cylinders producing torque impulse rotating an output member, a fuel control computer (10) for generating base fuel quantity signals indicative of the quantity of fuel to be delivered to each cylinder in response to the operational parameters of the engine, and fuel delivery means (14) for delivering fuel to the engine cylinders in response to said base fuel quantity signals, said fuel redistribution control system characterized by: means (16) for sequentially generating first signals indicative of the rotational velocity of the output member resulting from each torque impulse imparted to the engine's output member by said at least two cylinders; and fuel redistribution means (18, 20, 22, 24, 26, 28, 30) for generating corrected fuel quantity signals in response to said first signals, said corrected fuel quantity signals redistributing the quantity of fuel being delivered by said fuel delivery means (14) to said at least two cylinders during each engine cycle, tending to equalize the torque impulse generated by said at least two cylinders.
Claim 3
Dependent Claim
140 words
The control system of Claim 1 wherein said fuel redistribution means (18, 20, 22, 24, 26, 28, 30) comprises: difference means (18, 20) for generating difference signals indicative of the difference between the value of each of said first signals and an average value of said first signal; integrator means (22) for accumulating said difference signals generated with respect to each of said at least two cylinders to generate a fuel quantity correction signal for each cylinder; means for averaging (26) said fuel quantity correction signals to generate an average fuel quantity correction signal; and means for summing (28, 30) said individual fuel quantity correction signal corresponding to the cylinder to which fuel is to be delivered with said average fuel quantity correction signals and said base fuel quantity signal to generate a corrected fuel quantity signal for each cylinder.
Claim 4
Dependent Claim
48 words
The control system of Claim 2 wherein said difference means (18, 20) comprises: means for averaging (18) said sequentially generated first signals to generate an average first signal; and means for subtracting (20) each of said first signals from said average first signal to generate said difference signals.
Claim 5
Dependent Claim
48 words
The control system of Claim 2 wherein said difference means (18, 20) comprises: means for averaging (18) said sequentially generated first signals to generate an average first signal; and means for subtracting (20) each of said average first signals from said first signals to generate said difference signals.
Claim 6
Dependent Claim
97 words
The control system of Claim 3 or 4 wherein said means for generating said first signals (16) comprises: means for detecting predetermined rotational positions of the engine's output member (32, 34) to generate position signals indicative of equal rotational intervals of an operating cycle of the engine (12), said equal rotational intervals being equal in number to the number of torque impulses imparted to the engine's output member during each operational cycle; and means for measuring the rotational velocity of the engine's output member (38, 40) between sequentially generated position signals to generate said sequential first signals.
Claim 7
Dependent Claim
79 words
The control system of Claim 5 wherein said means for measuring the rotational velocity (38, 40) comprises: a clock (40) generating clock pulses at a predetermined frequency; and counter means (38) for counting the number of clock pulses generated between sequentially'generated position signals, said counter means storing a number at the end of each rotational interval inversely proportional to the rotational velocity of the engine's output member in said rotational interval and wherein said number is said first signal.
Claim 8
Dependent Claim
166 words
The control system of Claim 5 wherein said integrator means (22) comprises: decoder means (54, 56) for generating sequential cylinder designating signals in response to said position signals, a plurality of accumulators (46, 48, 50, 52), one associated with each cylinder, said plurality of accumulators enabled one at a time in a first predetermined sequence by said cylinder designating signals to store the difference signals generated in response to the torque impulses produced by the associated cylinder, wherein said stored difference signals in each accumulator (46, 48, 50, 52) are said fuel quantity correction signals; and switch means (58) connected to the outputs of said plurality of accumulators for selecting said fuel quantity signals stored in said accumulators, one at a time in a second predetermined sequence in response to said sequential cylinder designating signals, said second predetermined sequence selecting the fuel quantity correction signal stored in the accumulator corresponding to the engine cylinders whose fuel requirements are currently being computed by the fuel control computer.
Claim 9
Dependent Claim
31 words
The control system of Claim 7 wherein said integrator means (22) further includes a multiplier (24) for multiplying the fuel quantity correction signal selected by said switch means by a constant.
Claim 10
Dependent Claim
63 words
The control system of Claim 3 wherein said means for summing (28, 30) comprises: subtraction means (28) for subtracting said average fuel quantity correction signal from said base fuel quantity signal to generate an intermediate fuel quantity signal; and adder means (30) for adding said individual fuel quantity correction signals to said intermediate fuel quantity signal to generate said corrected fuel quantity signals.,
Claim 11
Dependent Claim
63 words
The control system of Claim 4 wherein said means for summing (28, 30) comprises: adder means (28) for adding said average fuel quantity correction signal to said base fuel quantity signal to generate an intermediate fuel quantity signal; and subtraction means (30) for subtracting said individual fuel quantity correction signals from said intermediate fuel quantity signal to generate said corrected fuel quantity signals.
Claim 12
Independent Claim
288 words
A method for redistributing the fuel being delivered to an internal combustion engine (12) having at least two cylinders generating torque impulses rotating an output member, fuel control computer means (10) for generating base fuel quantity signals indicative of the fuel requirements of each engine cylinder in response to the operational parameters of the engine, and fuel delivery means (14) for delivering fuel to the cylinders in response to fuel quantity signals, said method comprising the steps of: detecting with a signal generator (16) the rotational velocity of the engine's output member to generate sequential first signals indicative of the magnitude of the individual torque impulse imparted to the output member by said cylinders; averaging said sequential first signals in an averaging circuit (18) to generate an average first signal indicative of the average rotational velocity of the engines output member; generating with a subtraction circuit (20) a different signal indicative of the difference between said first signals and said average first signal; accumulating in individual integrators (22) said difference signals with respect to each cylinder to generate a fuel quantity correction signal for each cylinder; averaging with an averaging circuit (26) the fuel quantity correction signals for all of the cylinders to generate an average fuel quantity correction signal; summing in summing circuits (28, 30) said base fuel quantity signal with said average fuel quantity correction signal and the fuel quantity correction associated with cylinder to which fuel is to be delivered to generate a corrected fuel quantity signal; and activating fuel delivery means (14) with said corrected fuel quantity signals to deliver a quantity of fuel to each engine cylinder tending to equalize the contribution of each cylinder to the total output torque of the engine.
Claim 13
Independent Claim
288 words
A method for redistributing the fuel being delivered to an internal combustion engine (12) having at least two cylinders generating torque impulses rotating an output member, fuel control computer means (10) for generating base fuel quantity signals indicative of the fuel requirements of each engine cylinder in response to the operational parameters of the engine, and fuel delivery means (14) for delivering fuel to the cylinders in response to fuel quantity signals, said method comprising the steps of: detecting with a signal generator (16) the rotational velocity of the engine's output member to generate sequential first signals indicative of the magnitude of the individual torque impulse imparted to the output member by said cylinders; averaging said sequential first signals in an averaging circuit (18) to generate an average first signal indicative of the average rotational velocity of the engines output member; generating with a subtraction circuit (20) a different signal indicative of the difference between said first signals and said average first signal; accumulating in individual integrators (22) said difference signals with respect to each cylinder to generate a fuel quantity correction signal for each cylinder; averaging with an averaging circuit (26) the fuel quantity correction signals for all of the cylinders to generate an average fuel quantity correction signal; summing in summing circuits (28, 30) said base fuel quantity signal with said average fuel quantity correction signal and the fuel quantity correction associated with cylinder to which fuel is to be delivered to generate a corrected fuel quantity signal; and activating fuel delivery means (14) with said corrected fuel quantity signals to deliver a quantity of fuel to each engine cylinder tending to equalize the contribution of each cylinder to the total output torque of the engine.
Claim 14
Dependent Claim
109 words
The method of Claim 11 wherein said step of detecting the rotational velocity of the engine's output member comprises the steps of: detecting' with a sensor (32, 34) predetermined rotational positions of the engine's output member dividing an operational cycle of the engine into a plurality of equal angular intervals to generate position signals, said plurality of equal angular intervals equal in number to the number of engine cylinders; generating with a clock (40) pulses at a predetermined frequency substantially higher than the rotational speed of the engine; and counting in a counter (38) said pulses, generated between sequentially generated position signals to generate said seqentially generated first signal.
Claim 15
Dependent Claim
163 words
The method of Claim 12 wherein said step of individually accumulating said difference signals comprises the steps of: decoding in decoder means (54, 56) said position signals to generate a repetitive set of cylinder designating signals, each set of cylinder designating signals having a cylinder designating signal associated with each cylinder; sequentially enabling a plurality of accumulators (46, 48, 50, 52) one associated with each engine cylinder, in a first predetermined sequence determined by said repetitive set of cylinder designating signals to store said difference signals, each accumulator storing the difference signals generated in response to the torque impulse produced by its associated cylinder; and enabling a switch means (58) with said repetitive set of cylinder designating to output the content of each accumulator in a second predetermined sequence, said second predetermined sequence outputing the content of the accumulator associated with the cylinder whose fuel requirements are currently being computed, and wherein the contents of said accumulators are said fuel quantity correction signal.
Claim 16
Dependent Claim
70 words
The method of Claim 13 wherein said step of generating a difference signal subtracts said first signals from said average first signal, said step of summing includes the steps of: subtracting said average fuel quantity correction signal from said base fuel quantity signal to generate an intermediate fuel quantity signal; and adding said fuel quantity correction signal to said intermediate fuel quantity signal to generate said corrected fuel quantity signal.
Claim 17
Dependent Claim
69 words
The method of Claim 13 wherein said step of generating a difference signal subtracts said average first signal from said first signal, said step of summing includes the steps of: adding said average fuel quantity signal to said base fuel quantity signal to generate an intermediate fuel quantity signal; and subtracting said fuel quantity correction signal from said intermediate fuel quantity signal to generate said corrected fuel quantity signal.
References Cited (Backward Citations)
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