SYSTEM AND METHOD FOR CONTROLLING TORQUE DURING ENGINE START OPERATIONS IN HYBRID VEHICLES
First Claim
1. A control system for a hybrid vehicle that includes an internal combustion engine and an electric motor, comprising:
- an engine speed control module that increases engine speed during a first calibration period based on a driver torque request and a predetermined torque threshold;
an air pressure control module that decreases intake manifold pressure (MAP) of the engine during a second calibration period based on the driver torque request and the predetermined torque threshold; and
an engine torque control module that starts the engine during a period after the first and second calibration periods by activating N of M cylinders of the engine, wherein N is based on the driver torque request and the predetermined torque threshold.
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Abstract
A control system for a hybrid vehicle that includes an internal combustion engine and an electric motor includes an engine speed control module, an air pressure control module, and an engine torque control module. The engine speed control module increases engine speed during a first calibration period based on a driver torque request and a predetermined torque threshold. The air pressure control module decreases intake manifold pressure (MAP) of the engine during a second calibration period based on the driver torque request and the predetermined torque threshold. The engine torque control module starts the engine during a period after the first and second calibration periods by activating N of M cylinders of the engine, wherein N is based on the driver torque request and the predetermined torque threshold.
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Citations
20 Claims
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1. A control system for a hybrid vehicle that includes an internal combustion engine and an electric motor, comprising:
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an engine speed control module that increases engine speed during a first calibration period based on a driver torque request and a predetermined torque threshold; an air pressure control module that decreases intake manifold pressure (MAP) of the engine during a second calibration period based on the driver torque request and the predetermined torque threshold; and an engine torque control module that starts the engine during a period after the first and second calibration periods by activating N of M cylinders of the engine, wherein N is based on the driver torque request and the predetermined torque threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a hybrid vehicle that includes an internal combustion engine and an electric motor, comprising:
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increasing engine speed during a first calibration period based on a driver torque request and a predetermined torque threshold; decreasing intake manifold pressure (MAP) of the engine during a second calibration period based on the driver torque request and the predetermined torque threshold; and starting the engine during a period after the first and second calibration periods by activating N of M cylinders of the engine, wherein N is based on the driver torque request and the predetermined torque threshold. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification