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US 11,460,375 B2Granted
Engine apparatus and noise detection system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYoshiya Yamashita
Life of this patent
Estimating the term…
Abstract
A specific sound having a higher frequency than an operation sound of an engine is generated in synchronization with timing of a top dead center of a specific cylinder of the engine. Thus, timing of a noise of the engine is estimated by using, for example, a deviation in time between timing of generation of a specific sound and timing at which a noise occurs in the engine, based on a sound collected from around the engine without directly using a signal of a crank angle of the engine.
Claims3
A noise detection system, comprising:
- an engine apparatus comprising:
- an engine accommodated in an engine compartment of a vehicle;
- and
- a specific sound generator disposed in the engine compartment or attached to a wall part of the engine compartment, the specific sound generator configured to generate a specific sound having a frequency higher than an operation sound of the engine in synchronization with timing of a top dead center of a specific cylinder of the engine;
- a sound collector configured to collect a sound including the specific sound in the engine compartment;
- and
- an estimator configured to estimate presence or absence and timing of generation of a noise based on the sound collected by the sound collector, wherein
- the estimator is configured to estimate a crank angle of the engine at a time when a noise occurs in the engine, based on a deviation in time between a timing of the noise occurring in the engine and a further timing of the specific sound collected by the sound collector.
5 more elements
Dependencies are inferred from the claim text.