Throttle control in internal combustion engine for noise reduction
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNobutaka Takeuchi, Shinji Nagai
Life of this patent
Estimating the term…
Abstract
Limitation of the opening rate of the throttle valve is prohibited unless the following conditions have been all satisfied: (i) the engine speed detected at starting opening the throttle valve is below a prescribed speed; (ii) the throttle angle detected at starting opening the throttle valve is below a prescribed throttle angle; (iii) the target throttle-open angle is above a prescribed throttle-open angle; and (ix) the target opening rate of the throttle valve is above a prescribed opening rate.
Claims15
1-7. (canceled)
A method for controlling a throttle valve of an internal combustion engine, comprising:
- executing under given conditions a throttle opening rate limitation limiting a throttle opening rate at which the throttle valve is opened, below a limit opening rate;
- and
- prohibiting the throttle opening rate limitation if an engine speed of the internal combustion engine detected at starting opening the throttle valve is above a prescribed engine speed.
A method for controlling a throttle valve of an internal combustion engine, comprising:
- executing under given conditions a throttle opening rate limitation limiting a throttle opening rate at which the throttle valve is opened, below a limit opening rate, and
- prohibiting the throttle opening rate limitation if an opening amount of the throttle valve is not changing across a predetermined range thereof.
A throttle system for an internal combustion engine, comprising:
- a throttle valve;
- an accelerator operated by an operator to adjust an engine output of the internal combustion engine;
- an engine speed detector for detecting an engine speed of the internal combustion engine;
- and
- a throttle valve controller that is adapted to:
- control the throttle valve to open in accordance with a manner in which the accelerator has been operated,
- execute under given conditions a throttle opening rate limitation limiting a throttle opening rate at which the throttle valve is opened, below a limit opening rate, and
- prohibit the throttle opening rate limitation if the engine speed detected via the engine speed detector at starting opening the throttle valve is above a prescribed engine speed.
A throttle system for an internal combustion engine, comprising:
- an accelerator operated by an operator to adjust an engine output of the internal combustion engine;
- a throttle valve;
- and
- a throttle valve controller that is adapted to:
- control the throttle valve to open in accordance with the manner in which the accelerator has been operated,
- execute under given conditions a throttle opening rate limitation limiting a throttle opening rate at which the throttle valve is opened, below a limit opening rate;
- determine whether the throttle opening amount is changing across a predetermined range thereof, and
- prohibit the throttle opening rate limitation if the throttle opening amount is not changing across the predetermined range.
Dependencies are inferred from the claim text.