Latch Assembly and Valvetrain Comprising Same
US-2024093622-A1 · Mar 21, 2024 · US
Spark ignition internal combustion engine having intake valves with variable actuation and delayed closure
US9200548B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9200548-B2 |
| Application number | US-201414201223-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 7, 2014 |
| Priority date | May 17, 2013 |
| Publication date | Dec 1, 2015 |
| Grant date | Dec 1, 2015 |
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- Title
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Abstract
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A spark-ignition supercharged internal-combustion gasoline engine is equipped with a system for variable actuation of the intake valves including a pressurized fluid chamber set between intake valve and a respective control cam, and an electrically actuated valve, the opening of which vents the pressure chamber so as to cause rapid closing of the valve, as a result of the respective elastic return means, even when the respective cam would tend to keep the valve open. The variable-valve-actuation system is used in combination with control cams of the intake valves shaped in such a way as to generate an intake valve lift profile including a boot portion with substantially constant lift. The boot portion is provided in the final part of the opening cycle of the intake valve, after bottom dead center.
First claim
Opening claim text (preview).
What is claimed is: 1. A multi-cylinder internal-combustion engine, comprising: at least one intake valve and at least one exhaust valve for each cylinder, each provided with respective elastic return means that bias the valve into a closed position, for controlling the respective intake and exhaust conduits, at least one camshaft, for actuating the intake valves and the exhaust valves of the engine cylinders by means of respective tappets, wherein each intake valve is a valve…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F01L13/0015Primary
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9200548B2 cover?
- A spark-ignition supercharged internal-combustion gasoline engine is equipped with a system for variable actuation of the intake valves including a pressurized fluid chamber set between intake valve and a respective control cam, and an electrically actuated valve, the opening of which vents the pressure chamber so as to cause rapid closing of the valve, as a result of the respective elastic ret…
- Who is the assignee on this patent?
- Fiat Ricerche, C R F Società Consortile Per Azioni
- What technology area does this patent fall under?
- Primary CPC classification F01L13/0015. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 01 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).