Vacuum force amplifier for internal combustion engine
AssigneeAudi NSU Auto Union Aktiengesellschaft
InventorsRodolfo Rocchio, Fritz Naumann, Heinrich Strotkotter
Life of this patent
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Abstract
The air intake of an internal-combustion engine passes through a throttle whose upstream and downstream sides are shunted by an idle-speed circuit. A vacuum-actuated auxiliary device has a vacuum line connected to the downstream side of the throttle. An injector-type jet pump connected in the idle circuit has an outlet connected to the downstream side of the throttle, a high-pressure inlet connected to the upstream side of the throttle, and a low-pressure input connected to the vacuum line. This jet pump serves as a vacuum amplifier during low-speed engine operation to ensure sufficient vacuum to drive the auxiliary load.
Claims7
A system comprising:
- an internal-combustion engine having a throttle through which intake air passes and having an upstream side and a downstream side;
- an idle-speed circuit shunting said upstream and downstream sides of said throttle;
- an injector-type jet pump in said idle circuit having an output connected to said downstream side, a high-pressure input connected to said upstream side, and a low-pressure input;
- and
- a vacuum-actuated auxiliary device having a vacuum line connected to said low-pressure input.
Dependencies are inferred from the claim text.