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System and method for adjusting actuation timing of valves in piston engines

A piston engine, actuation technology, applied in engine control, engine components, machine/engine, etc.

Active Publication Date: 2019-11-08
JACOBS VEHICLE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These differences, and accompanying performance variations, mean that VVA components will not always perform exactly as desired

Method used

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  • System and method for adjusting actuation timing of valves in piston engines
  • System and method for adjusting actuation timing of valves in piston engines
  • System and method for adjusting actuation timing of valves in piston engines

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Embodiment Construction

[0012] This figure illustrates an embodiment of a system and method providing adjustable actuation timing of valves in a piston engine. Actuation timing may involve opening and closing intake and exhaust valves in an automobile's internal combustion engine. Although described in more detail below, in general, the system and method make the necessary adjustments to actuation timing to account for performance variations between variable valve actuation assemblies in a piston engine and to account for variations in piston engines of the same class. Performance variation between variable valve actuation components. A position sensor is employed and its position reading is used as the basis for any adjustments. The systems and methods bring greater precision and greater reliability and consistency to valve actuation timing in piston engines, and help ensure improved fuel economy, reduced exhaust emissions, and overall enhanced performance in related automobiles. engine performanc...

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Abstract

A system for providing adjustable actuation timing of one or more valves (16) in a piston engine includes a position sensor (12) and a variable valve actuation assembly (10). The valve (16) may be an intake / exhaust valve in an internal combustion engine of an automobile. As the valve (16) is actuated in the piston engine, a position sensor (12) takes a reading of the position of the valve (16). A variable valve actuation assembly (10) controls the timing of actuation of the valve (16). The timing of actuation of valve (16) may be adjusted based in part or more on one or more position readings from position sensor (12). The variable valve actuation assembly (10) may be a lost motion assembly (10).

Description

[0001] This application claims the benefit of U.S. Provisional Serial No. 62 / 077,686, filed November 10, 2014, which is hereby incorporated by reference in its entirety. technical field [0002] The present disclosure relates generally to variable valve actuation assemblies for piston engines, and more particularly to making adjustments to the timing of actuation of valves in piston engines. Background technique [0003] Variable valve actuation (VVA) assemblies are commonly provided in piston engines, such as automotive internal combustion engines, and are used to control the timing of actuation of valves in the engine. Actuation timing involves opening and closing intake and exhaust valves. Intake valves allow air or an air-fuel mixture to enter the engine cylinders, and exhaust valves allow exhaust gases to exit the cylinders. In general, VVA components can help improve fuel economy, reduce exhaust emissions, and enhance engine performance in associated vehicles. Engine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/00F01L1/34F01L9/02F01L9/14F01L9/10F01L9/11F01L9/12F01L9/20
CPCF01L9/14F01L9/12F01L9/11F01L9/10F01L9/20F01L2009/2167
Inventor R·T·辛普森
Owner JACOBS VEHICLE SYST