System and method for controlling speed of an engine
First Claim
1. A method for controlling speed of an engine in a vehicle including at least one mechanical system, a battery, and a passenger compartment, the method comprising:
- determining a desired engine power output;
using at least the desired engine power output to determine a desired engine speed;
determining whether the desired engine speed is within one of a plurality of predetermined engine speed ranges;
determining a noise-vibration level for the vehicle as a function of at least one of a corresponding vibration level for at least one vehicle mechanical system and a sound level for the passenger compartment for the engine operating at the desired engine speed;
determining whether the noise-vibration level is within a target range when it is determined that the desired engine speed is within one of the predetermined engine speed ranges; and
controlling the engine at the desired engine speed when the determined noise-vibration level is within the target range and it is determined that the desired engine speed is within one of the predetermined engine speed ranges.
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Accused Products
Abstract
A system and method for controlling the speed of an engine includes determining a desired engine power output and engine speed, and determining whether the desired engine speed is within one of a number of predetermined engine speed ranges. It is then determined whether a noise-vibration level for the vehicle is within a target range when it is determined that the desired engine speed is within one of the predetermined engine speed ranges. The noise-vibration level is a function of at least one of a corresponding vibration level for one or more vehicle mechanical systems, and a noise level for the passenger compartment for the engine operating at the desired engine speed. The engine is then controlled at the desired engine speed when the determined noise-vibration level is within a target range, and it is determined that the desired engine speed is within one of the predetermined engine speed ranges.
37 Citations
18 Claims
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1. A method for controlling speed of an engine in a vehicle including at least one mechanical system, a battery, and a passenger compartment, the method comprising:
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determining a desired engine power output; using at least the desired engine power output to determine a desired engine speed; determining whether the desired engine speed is within one of a plurality of predetermined engine speed ranges; determining a noise-vibration level for the vehicle as a function of at least one of a corresponding vibration level for at least one vehicle mechanical system and a sound level for the passenger compartment for the engine operating at the desired engine speed; determining whether the noise-vibration level is within a target range when it is determined that the desired engine speed is within one of the predetermined engine speed ranges; and controlling the engine at the desired engine speed when the determined noise-vibration level is within the target range and it is determined that the desired engine speed is within one of the predetermined engine speed ranges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling speed of an engine in a vehicle including a plurality of mechanical systems, a battery, and a passenger compartment, the method comprising:
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determining a desired engine power based on at least one condition of the vehicle; using at least the desired engine power to determine a desired engine speed; determining an engine frequency based on the desired engine speed; comparing the engine frequency to modal separation values which indicate a corresponding resonant frequency for at least one of the vehicle mechanical systems; using the desired engine speed as a target engine speed when the engine frequency is outside the at least one corresponding resonant frequency; determining a noise-vibration level for the vehicle based at least in part on vibration of at least one the vehicle mechanical systems for the engine operating at the target engine speed; and controlling the engine at the target engine speed when the determined noise-vibration level is within a target range. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A control system for controlling speed of an engine in a vehicle including at least one mechanical system, a battery, and a passenger compartment, the control system comprising:
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a sensor configured to sense vibrations in at least one vehicle mechanical system, and to output signals related to the sensed vibrations; and a controller configured to; receive a plurality of inputs related to operation of the vehicle, determine a desired engine power based on the inputs received, use the desired engine power to determine a desired engine speed, and determine whether the desired engine speed is within one of a plurality of predetermined engine speed ranges, the controller being further configured to; receive the signals from the sensor and determine whether a noise-vibration level for the vehicle is within a target range when it is determined that the desired engine speed is within one of the predetermined engine speed ranges, the determined noise-vibration level being based on at least one the signals received, and control the engine at the desired engine speed when the determined noise-vibration level is within the target range and it is determined that the desired engine speed is within one of the predetermined engine speed ranges. - View Dependent Claims (17, 18)
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Specification