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US 2022/0298977 A1Published application
Methods and system for controlling an engine with two throttles
AssigneeFord Global Technologies, LLC
InventorsRohit Bhat, Rob Ciarrocchi, Adam J. Richards, Conner Cecott
Life of this patent
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Abstract
Systems and methods for operating an engine that includes two throttles that are arranged in parallel to deliver air into a single intake manifold are described. In one example, a first throttle and a second throttle are opened according to a value of a variable that changes as a function of a requested engine air flow.
Claims19
An engine operating method, comprising:
- via a controller, adjusting engine air flow via a first of two throttles arranged in parallel in an engine intake system while a second of the two throttles arranged in parallel is fully closed in response to a requested engine air flow being less than a first threshold as determined via the controller;
- via the controller, adjusting engine air flow via the first of the two throttles and the second of the two throttles in response to the requested engine air flow being greater than the first threshold and less than a second threshold, the first of the two throttles and the second of the two throttles open unequally when the requested engine air flow is greater than the first threshold and less than the second threshold as determined via the controller;
- and
- via the controller, adjusting engine flow via the first of the two throttles and the second of the two throttles in response to the requested engine air flow being greater than the second threshold, the first of the two throttles and the second of the two throttles open equally when the requested engine air flow is greater than the second threshold.
1 more element
An engine system, comprising:
- an engine including a first throttle and a second throttle arranged in parallel with the first throttle, the first throttle and the second throttle controlling air flow to a common intake manifold;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to adjust air flow through the first throttle in response to a split ratio and a requested engine air flow, and that cause the controller to adjust air flow through the second throttle in response to the split ratio and the requested engine air flow, the split ratio and the requested engine air flow determined via the controller, and the split ratio decreases as engine air flow increases.
An engine operating method, comprising:
- via a controller, partially opening a first of two throttles before partially opening a second of the two throttles in response to an air flow request, the air flow request determined via the controller, the two throttles arranged in parallel;
- via the controller, adjusting the second of the two throttles to provide an air flow that is equal to an air flow that is provided via the first of the two throttles in response to the air flow request exceeding a threshold as determined via the controller;
- partially opening the second of the two throttles before partially opening the first of the two throttles after a most recent reduction of the engine air flow request from a second threshold to a first threshold;
- and
- fully closing the first of the two throttles after the most recent reduction of the engine air flow request from the second threshold to the first threshold.
2 more elements
17-18. (canceled)
Dependencies are inferred from the claim text.