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US 12,448,931 B2Granted
Torque compensation for air/fuel switching
AssigneesToyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
InventorsGarrett Parker Munson, Adam C. McJunkin
Life of this patent
Estimating the term…
Abstract
A vehicle includes one or more processors configured to select an air/fuel ratio for the engine that is different from the stoichiometric air/fuel ratio. The one or more processors are further configured to select a torque request for the engine, determine a load request for the engine based on at least the torque request and the selected air/fuel ratio, and determine an output to a throttle actuator based on the load request for the engine.
Claims18
A vehicle comprising:
- one or more processors disposed within the vehicle and configured to:
- select an air/fuel ratio for an engine of the vehicle, wherein the selected air/fuel ratio is different from a stoichiometric air/fuel ratio;
- select a torque request for the engine;
- determine a load request for the engine based on at least the torque request and the selected air/fuel ratio;
- and
- determine a first output to a throttle actuator based on the load request for the engine,
- wherein the one or more processors are further configured to:
- if the selected air/fuel ratio exceeds a threshold maximum, determine the load request for the engine based on at least the torque request and the threshold maximum;
- and
- if the selected air/fuel ratio is less than a threshold minimum, determine the load request for the engine based on at least the torque request and the threshold minimum.
7 more elements
A method comprising:
- with one or more processors disposed within a vehicle:
- selecting an air/fuel ratio for an engine of the vehicle, wherein the selected air/fuel ratio is different from a stoichiometric air/fuel ratio;
- selecting a torque request for the engine;
- determining a load request for the engine based on at least the torque request and the selected air/fuel ratio;
- and
- determining, based on the load request for the engine, at least one of a first output to a throttle actuator, a second output to a spark actuator, or a third output to a variable valve timing (VVT) actuator;
- if the selected air/fuel ratio exceeds a threshold maximum, determining the load request for the engine based on at least the torque request and the threshold maximum;
- and
- if the selected air/fuel ratio is less than a threshold minimum, determining the load request for the engine based on at least the torque request and the threshold minimum.
6 more elements
A system comprising:
- a vehicle;
- one or more processors disposed within the vehicle and configured to, if an engine of the vehicle is at idle:
- select an air/fuel ratio for the engine of based at least in part on a sensor reading from an air/fuel sensor located downstream of a catalytic converter in an exhaust system of the vehicle, wherein the selected air/fuel ratio is different from a stoichiometric air/fuel ratio;
- select a torque request for the engine;
- if the selected air/fuel ratio exceeds a threshold maximum, determine a load request for the engine based on at least the torque request and the threshold maximum;
- if the selected air/fuel ratio is less than a threshold minimum, determine the load request for the engine based on at least the torque request and the threshold minimum;
- if the selected air/fuel ratio is between the threshold minimum and the threshold maximum, determine the load request for the engine based on at least the torque request and the selected air/fuel ratio;
- and
- determine, based on the load request for the engine, at least one of a first output to a throttle actuator, a second output to a spark actuator, or a third output to a variable valve timing (VVT) actuator.
6 more elements
Dependencies are inferred from the claim text.