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US 4,791,902 AGranted
Throttle valve control system for an internal combustion engine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYoshikazu Ishikawa, Kouji Yamaguchi
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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYoshikazu Ishikawa, Kouji Yamaguchi
Estimating the term…
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.
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:
A throttle valve control system for controlling the opening of a throttle valve disposed in an air induction system of an internal combustion engine mounted on a vehicle, comprising:
A throttle valve control system for controlling the opening of a throttle valve disposed in an air induction system of an internal combustion engine mounted on vehicle, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Of the electric type: characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal…
Circuit arrangements for generating control signals: introducing closed-loop corrections
Characterised by the means for actuating the throttles: at least one throttle being moved only by an electric actuator
Controlling combustion engines
Term ended 15 Jul 2007 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to a throttle valve control system for controlling the opening of the throttle valve of an internal combustion engine.
2. Description of Background Information
FIG. 1 is a schematic diagram of the construction of embodiments of the present invention;
FIG. 2 is a block diagram showing a concrete construction of the control circuit in the system shown in FIG. 1;
FIG. 3 is a flowchart showing the operation of the CPU 27 in a first embodiment of the present invention;
The preferred embodiments of the present invention will be described with reference to the accompanying drawings.
In the throttle valve control system shown in FIG. 1 as the preferred embodiment of the present invention, an accelerator pedal 1 is connected at an end of a bracket 2, having a generally doglegged shape, which is supported on a shaft 3 so that a swing motion of the accelerator pedal 1 with respect to the floor of the vehicle is permitted. At the other end of the bracket 2, there is provided a return spring 4 for urging the accelerator pedal 1 toward an idling position. An accelerator pedal operation position sensor 7 made up of a potentiometer is connected to the shaft 3, and produces an output voltage corresponding to the accelerator pedal angle, i.e., the rotation angle of the accelerator pedal around the shaft 3 from the idle position.
On the other hand, a throttle valve 12 is provided in an intake pipe 11 of the engine and a shaft 12a of the throttle valve 12 is provided with a throttle valve opening sensor 14 which is made up of a potentiomater like the acceleration pedal operation position sensor 7. The throttle valve opening sensor 14 generates an output voltage corresponding to an opening angle of the throttle valve 12. In addition, a rotation shaft of a pulse motor 15 is connected to the shaft 12a of the throttle valve 12.