Engine exhaust system for a vehicle
AssigneeNissan Motor Co., Ltd.
InventorsMasanari Kobayashi, Takefumi Mitani
Life of this patent
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Abstract
An engine exhaust system for a vehicle is provided in which it is possible to obtain necessary vibration damping performance even when there are layout restrictions. For instance, a spherical joint on a front side of the vehicle and a spherical joint on a rear side of the vehicle, are positioned before and after two catalysts, and the components positioned between the front and rear spherical joints is unsupported by a vehicle body. Hence, a dynamic damper is formed. The resonant frequency of the dynamic damper, i.e. a frequency at which vibrations are absorbed can be adjusted by altering the modulus of elasticity and weight of the dynamic damper. Therefore, the necessary vibration damping performance can be obtained despite layout restrictions.
Claims22
An engine exhaust system for a vehicle, comprising:
- at least two flexible couplings having elastic characteristics, positioned at two different locations in the exhaust system;
- an intermediate component positioned between the at least two flexible couplings and having mass;
- and
- a dynamic damper formed by virtue of the elastic characteristics and the mass.
The engine exhaust system for a vehicle, comprising:
- at least two flexible couplings having elastic characteristics, positioned at two different locations in the exhaust system;
- and
- an intermediate component positioned between the at least two flexible couplings and having mass so that a dynamic damper is formed by virtue of the elastic characteristics and the mass.
An engine exhaust system for a vehicle, having a body, the engine exhaust system comprising:
- an upstream flexible coupling having a first elastic characteristic;
- a downstream flexible coupling having a second elastic characteristic;
- an intermediate component positioned between the upstream flexible coupling and the downstream flexible coupling and having a mass, the intermediate component being separated from a body of the vehicle;
- and
- a downstream component positioned further downstream of the downstream flexible coupling, the downstream component being mounted to the body of the vehicle.
An engine exhaust system to be positioned between an engine and a muffler of a vehicle having a body, the system comprising:
- an upstream flexible coupling configured and arranged to be closer to the engine than to the muffler;
- a downstream flexible coupling configured and arranged to be closer to the muffler than to the engine;
- an intermediate component configured and arranged to be positioned between the upstream flexible coupling and the downstream flexible coupling, the intermediate component configured and arranged to be separated from the body of the vehicle;
- and
- a downstream component configured and arranged to be positioned between the downstream flexible coupling and the muffler, the downstream component configured and arranged to be mounted to the body of the vehicle.
Dependencies are inferred from the claim text.