Intake system for an internal-combustion engine
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorJuergen Schorn
Life of this patent
Estimating the term…
Abstract
An intake system for an internal-combustion engine has an intake pipe with a throttle device, an air flow or air mass sensor and a filter device. In order to improve the quality of the measuring signal of the air flow or air mass sensor and to prevent subsequent signal corrections, a Helmholtz resonator is coupled to the intake pipe in the proximity of the air flow or air mass sensor which is tuned to the resonance frequency occurring during the operation of the internal-combustion engine. By coupling the Helmholtz resonator in the area of the air flow or air mass sensor, fluctuations of the air flow are smoothed in this area.
Claims11
An intake system for an internal-combustion engine having an intake pipe which extends between an air filter and a throttle device, and having an air flow or air mass sensor which is inserted in the intake pipe at a distance D1 from the air filter and at a distance D2 from the throttle device, wherein a Helmholtz resonator is coupled to the intake pipe proximate the air flow or air mass sensor and is tuned to the resonance frequency of the intake pipe occurring during operation of the internal-combustion engine, a distance d of the Helmholtz resonator from the air flow or air mass sensor being less than 0.5.times.D1 or 0.5.times.D2.
An arrangement of a Helmholtz resonator in an intake pipe, comprising:
- an intake pipe extending between an air filter and a throttle device;
- an air flow or air mass sensor arranged in said intake pipe at a distance D1 from the air filter and at a distance D2 from the throttle device;
- a Helmholtz resonator coupled to the intake pipe at a distance d from the air flow or air mass sensor, said Helmholtz resonator being tuned to the resonance frequency of the intake pipe, wherein the distance d is less than 0.5.times.D1 and is less than 0.5.times.D2.
A method of arranging a Helmholtz resonator in an intake system having an intake pipe extending between an air filter and a throttle device, and an air flow or air mass sensor arranged in the intake pipe at a distance D1 from the air filter and at a distance D2 from the throttle device, said Helmholtz resonator being tuned to the resonance frequency of the intake pipe, said method comprising:
- coupling the Helmholtz resonator to the intake pipe at a distance d from the air flow or air mass sensor, wherein the distance d is less than 0.5.times.D1 and is less than 0.5.times.D2.
Dependencies are inferred from the claim text.