Engine sound generation as transmission shifting aid for a hybrid electric vehicle
First Claim
1. A method for operating a vehicle having an electric machine and an engine coupled by a clutch to a manual transmission, comprising, by a controller:
- generating an acoustic signal to indicate a gearshift resulting in an engine speed being outside of a specified range in response to the electric machine operating as a motor and the clutch being open, the engine speed based on electric machine speed and an engaged gear of the manual transmission.
1 Assignment
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Accused Products
Abstract
A hybrid electric vehicle having an internal combustion engine and an electrical machine operable as a traction motor with a manual transmission arranged between the engine and the driving wheels and a clutch between the engine and the transmission generates an acoustic notification signal to indicate a gear shift that would result in either an excessive or insufficient engine speed. A different acoustic tone may be provided for a gear shift that would result in excessive engine speed than a gear shift that would result in insufficient engine speed. The acoustic notification signal may be a simulated engine noise.
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Citations
20 Claims
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1. A method for operating a vehicle having an electric machine and an engine coupled by a clutch to a manual transmission, comprising, by a controller:
generating an acoustic signal to indicate a gearshift resulting in an engine speed being outside of a specified range in response to the electric machine operating as a motor and the clutch being open, the engine speed based on electric machine speed and an engaged gear of the manual transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle comprising:
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an engine; a manual transmission coupled to the engine by a clutch; an electric machine operable as a traction motor; a speaker; and a controller configured to generate an audio signal for the speaker when the clutch is open and the electric machine is operating as a traction motor in response to engine speed of the engine being above a first threshold or being below a second threshold, wherein the engine speed is based on a selected gear of the manual transmission and rotational speed of the electric machine. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A vehicle comprising:
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an internal combustion engine; an electric machine operable to drive the vehicle; a manual transmission having an input coupled to the internal combustion engine by a clutch and an output coupled to vehicle driving wheels; and a controller configured to; detect whether the clutch is open; detect an engaged gear of the manual transmission; detect an operating parameter of the electrical machine while operating as a traction motor to drive the vehicle; and generate a notification signal in response to a gear shift resulting in engine speed being outside a specified range, wherein the engine speed is based on the operating parameter of the electrical machine and the engaged gear of the manual transmission. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification