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Engine control system having quick-open valve timing

A valve timing, engine technology, applied in engine control, engine components, combustion engines, etc., can solve problems such as uncontrolled cylinder pressure

Inactive Publication Date: 2015-09-09
ELECTRO-MOTIVE DIESEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, even though the peak cylinder pressure can be adjusted by the device of the '140 document, the cylinder pressure at which blowby occurs (e.g., the intake port is open) is not controlled

Method used

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  • Engine control system having quick-open valve timing
  • Engine control system having quick-open valve timing
  • Engine control system having quick-open valve timing

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 An exemplary internal combustion engine 10 is shown. Engine 10 is shown and described as a two-stroke dual fuel engine. However, it should be understood that engine 10 may be any other type of internal combustion engine, including a diesel engine or a gaseous fuel engine. Engine 10 may include an engine block 12 at least partially defining a plurality of cylinders 16 (only one shown) each having an associated cylinder head 20 . A cylinder liner 18 may be disposed within each engine cylinder 16 , and a cylinder head 20 may close one end of the cylinder liner 18 . A piston 24 may be slidably disposed within each cylinder liner 18 .

[0016] Each cylinder liner 18 , cylinder head 20 and piston 24 may collectively define a combustion chamber 22 that receives fuel from a fuel system 14 mounted on the engine 10 . Engine 10 may include any number of engine cylinders 16 with corresponding combustion chambers 22 . In an exemplary embodiment, engine 10 may be a sixt...

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PUM

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Abstract

An engine control system having quick-open valve timing is disclosed. The engine may have a cylinder, a piston slidably disposed in the cylinder, and an exhaust valve configured to open and close an exhaust port. Operation of the engine may include directing air and fuel into the cylinder, and combusting the air and fuel to force the piston between a TDC position and a BDC position. Operation may further include cyclically opening and closing the exhaust valve during piston movement according to a first valve timing. Operation may also include receiving a signal indicative of a condition associated with pre-ignition of the air and fuel, and selectively opening and closing the exhaust valve according to a second valve timing, based at least on the signal. In the second valve timing, the exhaust valve may be moved from a closed position to a maximum lift position in a shorter amount of time than in the first valve timing.

Description

technical field [0001] The present invention relates to engine control systems, and more particularly to an engine control system with fast opening valve timing. Background technique [0002] Engines, such as diesel engines and dual fuel engines, include ports and valves that regulate air, fuel, and exhaust gas into and out of the engine cylinders. The cylinders of some unidirectional-flow scavenged two-stroke dual-fuel engines include an intake port that is opened by the movement of the piston to allow the introduction of air and gaseous fuel, and one or more exhaust ports for removing combusted exhaust gas from the cylinder. valve. The exhaust valves are cyclically opened and closed to control the flow of exhaust gas from each cylinder. The opening / closing curve of the exhaust valve with respect to the crankshaft angle is generally known as valve timing. Valve timing—including how much the valve opens relative to crankshaft angle (eg, the amount of lift)—may be plotted ...

Claims

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Application Information

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IPC IPC(8): F01L1/34
CPCF01L13/08F01L1/08F02D13/0249F02B25/04F02D19/10Y02T10/12Y02T10/30F02D13/0215
Inventor D·班德亚帕德耶V·库马尔
Owner ELECTRO-MOTIVE DIESEL