Back to results
US 4,535,743 AGranted
Fuel injection apparatus for an internal combustion engine
AssigneeNippon Soken, Inc.
InventorsToshihiko Igashira, Taro Tanaka, Yasuyuki Sakakibara
Life of this patent
Estimating the term…
Abstract
A fuel injection apparatus for an internal combustion engine comprising: a nozzle body; a nozzle formed at the bottom of the nozzle body; an electroexpansive actuator having the electroexpansive effect; a valve member, slideably mounted within the nozzle body; and a fuel chamber formed between the electroexpansive actuator and the valve member. When the electroexpansive actuator expands to reduce the volume of the fuel chamber, the valve member is moved in the closed direction of the nozzle. When the electroexpansive actuator contracts to increase the volume of the fuel chamber, the valve member is moved in the open direction of the nozzle.
Claims22
A fuel injection apparatus for an internal combustion engine comprising:
- a nozzle body;
- a nozzle formed at the bottom of said nozzle body;
- an electroexpansive actuator having an electroexpansive effect;
- a valve member, slideably mounted within said nozzle body, for opening and closing said nozzle;
- and
- a fuel chamber formed between said electroexpansive actuator and said valve member;
- said electroexpansive actuator and said valve member being disposed so that expansion of said electroexpansive actuator reduces the volume of said fuel chamber, thereby moving said valve member in the closed direction of said nozzle and contraction of said electroexpansive actuator increases the volume of said fuel chamber, thereby moving said valve member in the open direction of said nozzle.
4 more elements
A fuel injection apparatus for an internal combustion engine comprising:
- a nozzle body;
- a nozzle formed at the bottom of said nozzle body;
- an electroexpansive actuator having an electroexpansive effect;
- a valve member, slideably mounted within said nozzle body, for opening and closing said nozzle;
- a fuel chamber formed between said electroexpansive actuator and said valve member;
- circular elongated fuel chamber means at the bottom of said valve member for receiving pressurized fuel from the outside, said circular elongated fuel chamber means leading to said nozzle when said nozzle is opened;
- and
- a fuel passage through said valve member, said fuel passage communicating said circular elongated fuel chamber means with said fuel chamber when said nozzle is closed;
- wherein
- expansion of said electroexpansive actuator reduces the volume of said fuel chamber to thereby move said valve member in the closed direction of said nozzle;
- and
- contraction of said electroexpansive actuator increases the volume of said fuel chamber to thereby move said valve member in the open direction of said nozzle.
9 more elements
A fuel injection apparatus for an internal combustion engine comprising:
- a nozzle body;
- a nozzle formed at the bottom of said nozzle body;
- an electroexpansive actuator having an electroexpansive effect;
- a valve member, slideably mounted within said nozzle body, for opening and closing said nozzle;
- a distance piece fixed on the top of said nozzle body and defining a fuel chamber formed between said electroexpansive actuator and said distance piece, said distance piece having a plurality of fuel passages communicating said fuel chamber with a space between said valve member and said distance piece, and
- a spring between said distance piece and said valve member, said spring biasing said valve member in the down direction;
- wherein
- expansion of said electroexpansive actuator reduces the volume of said fuel chamber to thereby move said valve member in the closed direction of said nozzle;
- and
- contraction of said electroexpansive actuator increases the volume of said fuel chamber to thereby move said valve member in the open direction of said nozzle.
7 more elements
A fuel injection apparatus for an internal combustion engine comprising:
- a nozzle body;
- a nozzle formed at the bottom of said nozzle body;
- an electroexpansive actuator having an electroexpansive effect;
- a valve member, slideably mounted within said nozzle body, for opening and closing said nozzle;
- a distance piece fixed on the top of said nozzle body and defining a fuel chamber between said electroexpansive actuator and said distance piece, said distance piece having a plurality of fuel passages communicating said fuel chamber with a space between said valve member and said distance piece;
- a spring on said distance piece;
- and
- a piston provided between said electroexpansive acturator and said spring, said spring biasing said piston in the contraciting direction of said electroexpansive actuator;
- wherein
- expansion of said electroexpasive actuator reduces the volume of said fuel chamber to thereby move said valve member in the closed direction of said nozzle;
- and
- contraction of said electroexpansive actuator increases the volume of said fuel chamber to thereby move said valve member in the open direction of said nozzle.
9 more elements
A fuel injection apparatus for an inernal combustion engine comprising:
- a nozzle body;
- a nozzle formed at the bottom of said nozzle body;
- an electroexpansive actuator having an electroexpansive effect;
- a valve member, slideably mounted within said nozzle body, for opening and closing said nozzle;
- a fuel chamber formed between said electroexpansive actuator and said valve member;
- means for generating a timing signal having a definite frequency;
- means for calculating a fuel injection amount in accordance with a predetermined driving state parameter of said internal engine;
- and
- means for applying a definite voltage signal, having a time period indicative of said fuel injection amount, to said electroexpansive actuator, each time said timing signal is generated;
- wherein
- expansion of said electroexpansive actuator reduces the volume of said fuel chamber to thereby move said valve member in the closed direction of said nozzle;
- and
- contraction of said electroexpansive actuator increases the volume of said fuel chamber to thereby move said valve member in the open direction of said nozzle.
10 more elements
A fuel injection apparatus for an enternal combustion engine comprising:
- a nozzle body;
- a nozzle formed at the bottom of said nozzle body;
- an electroexpansive actuator having an electroexpansive effect;
- a valve member, slideably mounted within said nozzle body, for opening and closing said nozzle;
- and
- a fuel chamber formed between said electroexpansive actuator and said valve member;
- a first fuel passage for supplying pressurized fuel to said nozzle;
- and
- a second fuel passage selectively opened and closed by said valve member to connect said first fuel passage with said fuel chamber;
- wherein
- expansion of said electroexpansive actuator reduces the volume of said fuel chamber to thereby move said valve member in the closed direction of said nozzle;
- and
- contraction of said electroexpansive actuator increases the volume of said fuel chamber to thereby move said valve meber in the open direction of said nozzle.
10 more elements
Dependencies are inferred from the claim text.