Invalidity dossier
US 5353767
Fuel and air induction system
Current assignee: Motors Liquidation Co
Added 9/23/2026, 9:29:45 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 5,353,767 A
Title: Fuel and air induction system
Assignee (original): General Motors Corp (current assignee listed as Motors Liquidation Co)
Inventors: Donald T. Carbone; Thomas R. Schaenzer; Scott A. Geiger; Roger M. Brisbane
Application no.: US 08/168,306
Priority/filing date: 1993-12-17
Publication (grant) date: 1994-10-11
Status as listed: Expired – Fee Related; anticipated expiration 2013-12-17
Purpose (from the source's "Definitions" summary): To provide an integrated fuel and air induction system for a multi-cylinder internal combustion engine in which injection nozzles discharge fuel adjacent the engine inlet ports, and individual injectors drawing from a single fuel plenum integral with the intake manifold meter fuel to those nozzles. The stated aim is to overcome drawbacks attributed to earlier approaches—for example, a single injector feeding multiple nozzles fuels all cylinders simultaneously without regard to cylinder timing ("less than optimal engine and emission performance"), and rail-mounted individual injectors require application-specific fuel rails and are bulky because the solenoid sits at the point of delivery, limiting injector location and fuel targeting.
Plain-language scope: A fuel meter body acts as the system "chassis," housing multiple individual electromagnetic fuel injectors in a common fuel plenum to minimize pressure variability between them. The body mounts inside a multi-piece intake manifold through a sealed opening, keeping fuel and electrical connections external to the intake air plenum. Both ends of each injector extend out of the plenum so fuel delivery tubes and electrical connectors can attach. Each injector feeds a flexible fuel line ending in a pressure-activated poppet nozzle aimed at a corresponding cylinder's intake location—so metering stays remote from the nozzle, allowing a smaller terminal unit, better nozzle positioning and fuel targeting, while still fueling cylinders individually.
Not established by the excerpt: the actual numbered claims and their precise language and scope; the full written description and drawings; the complete prior-art discussion and any cited references; and the list of classifications shown. Nothing here addresses litigation, ownership transfers, validity, or prior-art conclusions.
Generated 10/1/2026, 9:34:16 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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