US 2003/0226536 A1 · Engine intake system

Abstract

An engine intake system including an air cleaner with an intake noise-damping box. The system is easily switchable from a noise-damping state to a non-noise-damping state when high output of the engine is regarded as important. The intake noise-damping box is attached to one side wall of an air cleaner. It is formed by a substantially rectangular air intake frame, the inside of which functions as an air intake open to the inside and the outside of the air cleaner. A passage former can be attached and detached to/from the air intake frame. When attached, the passage former forms an air passage extending in the longitudinal direction of the air intake frame, and communicating with the inside and the outside of the air intake frame at the air intake.

Claims20

Dependent claims

An intake system of an engine, comprising:

an intake noise-damping box attached to a side wall of an air cleaner connected to an upstream end of an induction system of an engine,
wherein the intake noise-damping box includes:
a substantially rectangular air intake frame, an inside of which functions as an air intake open to an inside and an outside of the air cleaner;
and
a passage former which can be detached from the air intake frame and which forms an air passage extending in a longitudinal direction of the air intake frame when the passage former is mounted and communicating with the inside and the outside of the air intake frame at the air intake.

2 more elements

An intake system of an engine, comprising:

an intake noise-damping box attached to an upper side wall of an air cleaner connected to an upstream end of an induction system of an engine,
wherein the intake noise-damping box includes:
a substantially rectangular air intake frame, an inside of which functions as an air intake open to an inside and an outside of the air cleaner;
and
a passage former which can be detached from the air intake frame and which forms an air passage extending in a longitudinal direction of the air intake frame when the passage former is mounted and communicating with the inside and the outside of the air intake frame at the air intake.

2 more elements

An intake system of an engine, comprising:

an air cleaner with a case, the air cleaner being connected to an upstream end of an induction system of an engine;
and
an intake noise-damping box attached to an upper side of the case,
wherein the intake noise-damping box includes:
a substantially rectangular air intake frame, an inside of which functions as an air intake open to an inside and an outside of the air cleaner;
and
a passage former which can be detached from the air intake frame and which forms an air passage extending in a longitudinal direction of the air intake frame when the passage former is mounted and communicating with the inside and the outside of the air intake frame at the air intake.

4 more elements

Dependencies are inferred from the claim text.

Engine intake system

Life of this patent

Engine intake system

Life of this patent

Abstract

Claims20