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US 12,378,927 B2Granted
In-vehicle control device and method for controlling internal combustion engine
AssigneeHitachi Astemo, Ltd.
InventorsYoshihiro Sukegawa, Kengo Kumano, Yoshihiko Akagi, Kazuhiro Oryoji
Life of this patent
Estimating the term…
Abstract
This in-vehicle control device includes: a cooling period setting unit that sets a timing prior to the start timing of a predicted knock occurrence period as the increasing timing of a cooling amount of a combustion room, and sets a timing prior to an end timing of the predicted knock occurrence period as the decreasing timing of the cooling amount of the combustion room; and a cooling amount change unit that changes the cooling amount of the combustion room by a cooling mechanism on the basis of the set increasing and decreasing timings and a target cooling amount set by a target cooling amount setting unit.
Claims13
An in-vehicle control device mounted in an automobile that is driven by an internal combustion engine having a combustion chamber, the in-vehicle control device comprising:
- a cooling mechanism that cools the combustion chamber;
- an engine output prediction unit that predicts an engine output that is a future output of the internal combustion engine;
- a knock intensity prediction unit that predicts a future knock intensity on a basis of the engine output predicted by the engine output prediction unit;
- a knock occurrence period prediction unit that predicts a future knock occurrence period on the basis of the knock intensity predicted by the knock intensity prediction unit;
- a target cooling amount setting unit that sets a target amount of cooling delivered by the cooling mechanism on the basis of the knock intensity predicted by the knock intensity prediction unit;
- a cooling timing setting unit that sets, as an increase timing of an amount of cooling of the combustion chamber, a timing that precedes a start timing of the knock occurrence period predicted by the knock occurrence period prediction unit by a predetermined amount of time, and sets, as a decrease timing of the amount of cooling of the combustion chamber, a timing that precedes an end timing of the knock occurrence period predicted by the knock occurrence period prediction unit by a predetermined amount of time;
- and
- a cooling amount change unit that changes the amount of cooling of the combustion chamber by the cooling mechanism, on the basis of the increase timing and the decrease timing set by the cooling timing setting unit and the target amount of cooling set by the target cooling amount setting unit, wherein in response to a difference between the engine output predicted by the engine output prediction unit and an actual engine output being equal to or greater than a predetermined value, the cooling amount change unit changes the amount of cooling of the combustion chamber on the basis of the actual engine output, an actual amount of ignition delay, or an actual knock intensity.
5 more elements
An in-vehicle control device mounted in an automobile that is driven by an internal combustion engine having a combustion chamber, the in-vehicle control device comprising:
- a cooling mechanism that cools the combustion chamber;
- an engine output prediction unit that predicts an engine output that is a future output of the internal combustion engine;
- a knock intensity prediction unit that predicts a future knock intensity on a basis of the engine output predicted by the engine output prediction unit;
- a knock occurrence period prediction unit that predicts a future knock occurrence period on the basis of the knock intensity predicted by the knock intensity prediction unit;
- a target cooling amount setting unit that sets a target amount of cooling delivered by the cooling mechanism on the basis of the knock intensity predicted by the knock intensity prediction unit;
- a cooling timing setting unit that sets, as an increase timing of an amount of cooling of the combustion chamber, a timing that precedes a start timing of the knock occurrence period predicted by the knock occurrence period prediction unit by a predetermined amount of time, and sets, as a decrease timing of the amount of cooling of the combustion chamber, a timing that precedes an end timing of the knock occurrence period predicted by the knock occurrence period prediction unit by a predetermined amount of time;
- and
- a cooling amount change unit that changes the amount of cooling of the combustion chamber by the cooling mechanism, on the basis of the increase timing and the decrease timing set by the cooling timing setting unit and the target amount of cooling set by the target cooling amount setting unit, wherein
- in response to an amount of ignition delay exceeds a predetermined amount of ignition delay prior to the increase timing of the amount of cooling set by the cooling timing setting unit, the knock intensity exceeds a predetermined intensity, or at least one of water temperature, oil temperature, internal combustion engine wall temperature, and intake air temperature exceeds a predetermined temperature, the cooling amount change unit changes the amount of cooling of the combustion chamber on the basis of an actual engine output, an actual amount of ignition timing delay, or an actual knock intensity.
6 more elements
An in-vehicle control device mounted in an automobile that is driven by an internal combustion engine having a combustion chamber, the in-vehicle control device comprising:
- a cooling mechanism that cools the combustion chamber;
- an engine output prediction unit that predicts an engine output that is a future output of the internal combustion engine;
- a knock intensity prediction unit that predicts a future knock intensity on a basis of the engine output predicted by the engine output prediction unit;
- a knock occurrence period prediction unit that predicts a future knock occurrence period on the basis of the knock intensity predicted by the knock intensity prediction unit;
- a target cooling amount setting unit that sets a target amount of cooling delivered by the cooling mechanism on the basis of the knock intensity predicted by the knock intensity prediction unit;
- a cooling timing setting unit that sets, as an increase timing of an amount of cooling of the combustion chamber, a timing that precedes a start timing of the knock occurrence period predicted by the knock occurrence period prediction unit by a predetermined amount of time, and sets, as a decrease timing of the amount of cooling of the combustion chamber, a timing that precedes an end timing of the knock occurrence period predicted by the knock occurrence period prediction unit by a predetermined amount of time;
- and
- a cooling amount change unit that changes the amount of cooling of the combustion chamber by the cooling mechanism, on the basis of the increase timing and the decrease timing set by the cooling timing setting unit and the target amount of cooling set by the target cooling amount setting unit, wherein
- in response to determining that at the decrease timing of the amount of cooling set by the cooling timing setting unit, an amount of ignition delay exceeds a predetermined amount of ignition delay, the knock intensity exceeds a predetermined intensity, or at least one of water temperature, oil temperature, internal combustion engine wall temperature, and intake air temperature exceeds a predetermined temperature, the cooling amount change unit changes the amount of cooling of the combustion chamber on the basis of an actual engine output, an actual amount of ignition timing delay, or an actual knock intensity.
6 more elements
A method for controlling an internal combustion engine in an automobile, the automobile including the internal combustion engine having a combustion chamber, and a cooling mechanism for cooling the combustion chamber, the method comprising:
- an engine output prediction step for predicting an engine output that is a future output of the internal combustion engine;
- a knock intensity prediction step for predicting a future knock intensity on a basis of the engine output predicted in the engine output prediction step;
- a knock occurrence period prediction step for predicting a future knock occurrence period on the basis of the knock intensity predicted in the knock intensity prediction step;
- a target cooling amount setting step for setting a target amount of cooling delivered by the cooling mechanism on the basis of the knock intensity predicted in the knock intensity prediction step;
- a cooling timing setting step for setting, as an increase timing of an amount of cooling of the combustion chamber, a timing that precedes a start timing of the knock occurrence period predicted in the knock occurrence period prediction step by a predetermined amount of time, and sets, as a decrease timing of the amount of cooling of the combustion chamber, a timing that precedes an end timing of the knock occurrence period predicted in the knock occurrence period prediction step by a predetermined amount of time;
- and
- a cooling amount change step for changing the amount of cooling of the combustion chamber by the cooling mechanism, on the basis of the increase timing and decrease timing set in the cooling timing setting step and the target amount of cooling set in the target cooling amount setting step;
- and
- in response to determining a difference between the engine output predicted by the engine output prediction unit and an actual engine output being equal to or greater than a predetermined value, changing the amount of cooling of the combustion chamber on the basis of the actual engine output, an actual amount of ignition delay, or an actual knock intensity.
6 more elements
Dependencies are inferred from the claim text.