Throttle device for internal combustion engine
AssigneeDenso Corporation
InventorsKatsuya Torii, Hiroki Shimada
Life of this patent
Estimating the term…
Abstract
A throttle device for an internal combustion engine designed to absorb variations in dimensions of components by centering a closed-bottom tube of an integral plug-type slide bearing with a plastic shaft part of a throttle shaft, inserting a tube of the slide bearing in a ring-shaped clearance formed between an inner circumference of a first shaft insertion hole of a first bearing support of a throttle body and outer circumference of a first sliding part of the plastic shaft, then fixing by welding a ring-shaped end face of a flange of the slide bearing to a ring-shaped end face of the first bearing support using a welding method such as laser welding.
Claims7
A throttle device for an internal combustion engine comprised of:
- a throttle shaft rotating integrally with a throttle valve and having a sliding part with respect to a bearing at one end,
- a throttle body having a bore wall holding inside it said throttle valve in an operable state and a tubular bearing support supporting said sliding part of the throttle shaft, and
- an integral plug-type slide bearing accommodated and held in an inner circumference of said bearing support of the throttle body, rotatably supporting said sliding part of the throttle shaft, and air-tightly closing an opening of said bearing support of the throttle body,
- said throttle body having in said bearing support a shaft insertion hole in which said sliding part of the throttle shaft is inserted and having a ring-shaped end face at an open side of said bearing support, and
- said integral plug-type slide bearing having a closed-bottom tube rotatably and slidably supporting said sliding part of the throttle shaft and fit at its outer circumference in said shaft insertion hole with a clearance and a flange having an outer diameter larger than that tube and affixed to a ring-shaped end face of said bearing support.
Dependencies are inferred from the claim text.