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 Title: |
US4791902:
Throttle valve control system for an internal combustion engine
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Ishikawa, Yoshikazu; Wako, Japan
Yamaguchi, Kouji; Wako, Japan
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| Assignee: |
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, Japan
other patents from HONDA GIKEN KOGYO KABUSHIKI KAISHA (HONDA MOTOR CO., LTD.) (256400) (approx. 9,061)
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| Published / Filed: |
1988-12-20
/ 1987-07-15
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| Application Number: |
US1987000073655
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| IPC Code: |
Advanced:
F02D 11/10;
F02D 41/14;
IPC-7:
F02D 9/08;
F02D 41/14;
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| ECLA Code: |
F02D11/10B; F02D41/14; R02D11/10A2;
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| U.S. Class: |
Current:
123/399;
123/361;
Original:
123/399;
123/361;
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| Field of Search: |
123/339,352,399,361
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| Priority Number: |
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| Abstract: |
A throttle valve control system for an internal combustion engine sets a target value of a pressure in an intake pipe of the engine for attaining a minimum fuel consumption rate in response to a detected engine rotational speed, and drives the throttle valve to an opening determined so as to reduce the difference between the detected actual pressure in the intake pipe and the target value of the pressure in the intake pipe. When the actual operation position of the throttle valve is not in an allowable range of a target throttle valve opening determined in response to the detected engine speed, the throttle valve is controlled to reduce the difference between the actual operation position of the throttle valve and the target throttle valve opening.
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| Attorney, Agent or Firm: |
Pollock, Vande Sande and Priddy ;
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| Primary / Asst. Examiners: |
Argenbright, Tony M.;
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| INPADOC Legal Status: |
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| Family: |
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First Claim:
Show all 6 claims |
What is claimed is:
1. A throttle valve control system for controlling an opening of a throttle valve disposed in an air induction system of an internal combustion engine, comprising:
- engine speed detection means for detecting a rotational speed of said internal combustion engine;
- pressure detection means for detecting an actual pressure in an intake pipe of said air induction system, downstream of said throttle valve;
- throttle valve opening detection means for detecting an actual throttle valve opening of said throttle valve;
- first setting means for setting a target throttle valve opening to attain a minimum fuel consumption rate of said internal combustion engine, in accordance with said rotational speed detected by said engine speed detection means;
- second setting means for setting a target pressure in the intake pipe to attain the minimum fuel consumption rate of said internal combustion engine, in accordance with said rotational speed detected by said engine speed detection means; and
- drive means, for driving said throttle valve to an opening value selected to reduce a difference between said actual pressure in the intake pipe detected by said pressure detection means and said target pressure in the intake pipe set by said second setting means when said actual throttle opening detected by said throttle valve opening detection means is in an allowable range determined about said target throttle valve opening, and for driving said throttle valve to an opening value selected to reduce a difference between said actual throttle valve opening and said target throttle valve opening when said actual throttle valve opening is not in said allowable range.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 18 U.S. patent(s) that reference this one
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