US4919098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of electronically controlling engine
Assignee: Hitachi Ltd
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Filing: 1988-11-02
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Granted: 1990-04-24
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Expires: 2008-11-02
Abstract
Abstract An electronic engine control method and apparatus, which detects acceleration of a vehicle in the travelling directions, derives its differential or displacement difference, i.e., derivative of acceleration, thereby detects the longitudinal oscillation state of the vehicle in acceleration or deceleration and controls the output torque pattern of the engine so as to cause its phase to be opposite to the phase of the pattern of the derivative of acceleration derived.
Inventors
- 👤 Kousaku Shimada
- 👤 Teruji Sekozawa
- 👤 Motohisa Funabashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:43
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1497; F02D41/1498; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/1455; F02P5/15; F02P5/1502; F02P5/1504; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/1015; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
183 words
An electronic engine control apparatus comprising: a plurality of sensors for detecting operating conditions of an engine which drives a vehicle; a plurality of actuators for controlling the engine; control means for calculating manipulated variables of said actuators on the basis of outputs of said sensors and for supplying the manipulated variables to said actuators to control the output torque of the engine; means for measuring acceleration in the travelling directions of the vehicle; differentiation means for calculating displacement difference per unit time of said measured acceleration to thereby detect differentiated acceleration as the longitudinal oscillation of the vehicle in the travelling direction; and correction means responsive to said differentiation means for calculating a correction value, from the differentiated acceleration, of at least one of the manipulated variables of said actuators to correct the magnitude of the output torque of the engine so as to cause its phase to be opposite to the phase of magnitude of said displacement difference of acceleration and for supplying the calculated correction value to said control means to correct the at least one of said manipulated variables.
Claim 2
Dependent Claim
183 words
An electronic engine control apparatus comprising: a plurality of sensors for detecting operating conditions of an engine which drives a vehicle; a plurality of actuators for controlling the engine; control means for calculating manipulated variables of said actuators on the basis of outputs of said sensors and for supplying the manipulated variables to said actuators to control the output torque of the engine; means for measuring acceleration in the travelling directions of the vehicle; differentiation means for calculating displacement difference per unit time of said measured acceleration to thereby detect differentiated acceleration as the longitudinal oscillation of the vehicle in the travelling direction; and correction means responsive to said differentiation means for calculating a correction value, from the differentiated acceleration, of at least one of the manipulated variables of said actuators to correct the magnitude of the output torque of the engine so as to cause its phase to be opposite to the phase of magnitude of said displacement difference of acceleration and for supplying the calculated correction value to said control means to correct the at least one of said manipulated variables.
Claim 3
Dependent Claim
42 words
An electronic engine control apparatus according to claim 1, wherein said at least one of said actuators comprises an ignition coil, and the at least one of said manipulated variables of the actuators comprises an ignition advance angle of said ignition coil.
Claim 4
Dependent Claim
34 words
An electronic engine control apparatus according to claim 2, wherein said means for measuring acceleration calculates displacement difference per unit time of engine speed to obtain the acceleration in travelling directions of the vehicle.
Claim 5
Dependent Claim
32 words
An electronic engine control apparatus according to claim 1, further comprising correction value modifying means for modifying the correction value of said at least one manipulated variable calculated by said correction means.
Claim 6
Dependent Claim
34 words
An electronic engine control apparatus according to claim 4, wherein said correction value modifying means modifies said correction value at a predetermined delay time after detection of a longitudinal oscillation state of the vehicle.
Claim 7
Dependent Claim
52 words
An electronic engine control apparatus according to claim 2, wherein said correction means derives a product of said calculated displacement difference and a coefficient as the correction value of the ignition advance angle, and corrects the manipulated variable of ignition advance angle calculated in said control means by using said correction value.
Claim 8
Dependent Claim
19 words
An electronic engine control apparatus according to claim 6, further comprising means capable of arbitrarily setting said coefficient value.
Claim 9
Independent Claim
177 words
A method for electronically controlling an internal combustion engine including a plurality of sensors for detecting operating conditions of the engine for driving a vehicle and a plurality of actuators for controlling the engine, comprising: calculating manipulated variables of said actuators on the basis of the output of said sensors to control the output torque of the engine; measuring acceleration of the vehicle in the travelling directions; differentiating acceleration by calculating displacement difference per unit time of said measured acceleration to thereby detect differentiated acceleration as the longitudinal oscillation state of the vehicle in the travelling direction; calculating, from the differentiated acceleration, a correction value of at least one of the manipulated variables of said actuators to correct the magnitude of the output torque of the engine so as to cause its phase to be opposite to the phase of magnitude of said detected displacement difference of acceleration; and correcting the at least one of said manipulated variables of said actuators by using said correction value and supplying the result to at least one of said actuators.
Claim 10
Independent Claim
177 words
A method for electronically controlling an internal combustion engine including a plurality of sensors for detecting operating conditions of the engine for driving a vehicle and a plurality of actuators for controlling the engine, comprising: calculating manipulated variables of said actuators on the basis of the output of said sensors to control the output torque of the engine; measuring acceleration of the vehicle in the travelling directions; differentiating acceleration by calculating displacement difference per unit time of said measured acceleration to thereby detect differentiated acceleration as the longitudinal oscillation state of the vehicle in the travelling direction; calculating, from the differentiated acceleration, a correction value of at least one of the manipulated variables of said actuators to correct the magnitude of the output torque of the engine so as to cause its phase to be opposite to the phase of magnitude of said detected displacement difference of acceleration; and correcting the at least one of said manipulated variables of said actuators by using said correction value and supplying the result to at least one of said actuators.
Claim 11
Dependent Claim
39 words
The method according to claim 8, wherein said at least one of said actuators comprises an ignition coil, and the at least one of said manipulated variables of the actuators comprises an ignition advance angle of said ignition coil.
Claim 12
Dependent Claim
36 words
The method according to claim 8, wherein said step of measuring acceleration comprises the step of calculating displacement difference per unit time of engine speed to obtain the acceleration in the travelling directions of the vehicle.
Claim 13
Dependent Claim
48 words
The method according to claim 8, wherein said step of correcting comprises the step of modifying the correction value of said manipulated variable calculated by said step of calculating and correcting the at least one of said manipulated variables of said actuators by using said modified correction value.
Claim 14
Dependent Claim
27 words
The method according to claim 11, wherein said step of correcting is performed at predetermined delay time after detection of the longitudinal oscillation state of the vehicle.
Claim 15
Dependent Claim
37 words
The method according to claim 9, wherein said step of calculating comprises the step of deriving the product of the calculated displacement difference and a coefficient arbitrarily set as the correction value of the ignition advance angle.
Claim 16
Dependent Claim
42 words
An electronic engine control apparatus according to claim 1, wherein said at least one of said actuators comprises a throttle valve, and the at least one of said manipulated variables of the actuators comprises a throttle valve opening of said throttle valve.
Claim 17
Dependent Claim
44 words
An electronic engine control apparatus according to claim 1, wherein said at least one of said actuators comprises injection quantity control means, and the at least one of said manipulated variables of the actuators comprises the injection quantity of said injection quantity control means.
Claim 18
Dependent Claim
22 words
An electronic engine control apparatus according to claim 4, wherein said means for modifying includes a manual control accessible to the driver.
Claim 19
Dependent Claim
22 words
An electronic engine control apparatus according to claim 5, wherein said means for modifying includes a manual control accessible to the driver.
Claim 20
Dependent Claim
37 words
The method according to claim 8, wherein said at least one of said actuators comprises a throttle valve, and the at least one of said manipulated variables of the actuators comprises an opening of said throttle valve.
Claim 21
Dependent Claim
43 words
The method according to claim 8, wherein said at least one of said actuators comprises fuel injection quantity control means, and the at least one of said manipulated variables of the actuators comprises a fuel quantity of said fuel quantity injection control means.
Claim 22
Dependent Claim
18 words
The method according to claim 11, wherein said modifying is accomplished by the driver manipulating a manual control.
Claim 23
Dependent Claim
18 words
The method according to claim 12, wherein said modifying is accomplished by the driver manipulating a manual control.
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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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |