Claims
- 1. An apparatus for controlling an engine capable of lean mixture operation, comprising:
- an engine speed detecting unit for detecting an engine speed of said engine;
- an engine torque determining unit for determining a target engine torque corresponding to an acceleration requirement; and
- a storage unit for storing data map indicating values of target throttle opening of said engine with respect to parameters of said engine speed and said target engine torque, a plurality of sets of said values of target throttle opening being stored in said storage unit, and said sets being provided for different air-fuel ratio values of the mixture.
- 2. An apparatus according to claim 1, wherein said acceleration requirement is a target driving torque which is determined from a depression stroke of an accelerator pedal.
- 3. A method of controlling an engine capable of operating in lean mixture, comprising a step of determining a target throttle opening value as parameters of a detected engine speed, a target engine torque corresponding to an acceleration requirement and a plurality of target air-fuel ratio values.
- 4. An method according to claim 3, wherein said acceleration requirement is a target driving torque which is determined from a depression stroke of an accelerator pedal.
- 5. An apparatus according to claim 1, further comprising a control unit for (a) selecting a data map on the basis of a given air-fuel ratio, (b) looking up the selected data map, and (c) determining the target throttle opening according to the selected data map.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-044376 |
Mar 1992 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/917,949, filed Aug. 27, 1997, now U.S. Pat. No. 5,888,166, which is a divisional of application Ser. No. 08/700,854, filed Aug. 21, 1996, (U.S. Pat. No. 5,724,866); which is a continuation of prior application Ser. No. 08,521,411 (U.S. Pat. No. 5,580,334), filed Aug. 30, 1995, which is a divisional application of prior application Ser. No. 08/025,211 (U.S. Pat. No. 5,468,196) filed Mar. 2, 1993.
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Divisions (2)
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Number |
Date |
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Parent |
700854 |
Aug 1995 |
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Parent |
025211 |
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Continuations (2)
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Date |
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Parent |
917949 |
Aug 1997 |
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Parent |
521411 |
Aug 1995 |
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