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Engine including system and method for reducing oil entrainment in a combustion chamber

A technology of engines and combustion chambers, applied to combustion engines, internal combustion piston engines, engine control, etc., can solve problems such as increased emissions, low oil economy, etc.

Inactive Publication Date: 2016-03-30
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This oil entrainment can lead to increased oil residue and fouling on pistons, intake and exhaust manifolds, fuel injectors and valves as well as increased emissions and poor oil economy

Method used

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  • Engine including system and method for reducing oil entrainment in a combustion chamber
  • Engine including system and method for reducing oil entrainment in a combustion chamber
  • Engine including system and method for reducing oil entrainment in a combustion chamber

Examples

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Embodiment Construction

[0062] Examples of the present invention will now be described more fully with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the invention, its application, or uses.

[0063] refer to figure 1 , depicts a vehicle assembly 10 . The vehicle assembly 10 may include an engine assembly 12 , a transmission 14 , an output shaft 16 , a drive axle 18 , and a control module 22 . As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory, a combinational logic circuit that executes one or more software or firmware programs , and / or other suitable components that provide the described functions. The transmission 14 may engage the engine assembly 12 and use power from the engine assembly 22 to drive the output shaft 16 and drive rotation of the drive axle 18 .

[0064] additional reference figure...

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PUM

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Abstract

The present invention relates to engines including systems and methods for reducing oil carryover in a combustion chamber. The engine assembly may include an engine structure, a piston, a first valve, and a first valve actuation assembly. The engine structure may define a combustion chamber and a first port in communication with the combustion chamber. A piston is positionable within the combustion chamber and is reciprocally displaceable between a top dead center position and a bottom dead center position. The first valve selectively opens and closes the first port. The first valve actuation assembly is engageable with the first valve and is operable in first and second modes. The first valve actuation assembly is operable in a first mode when fuel is provided to the combustion chamber and is operable in a second mode when fuel is shut off from the combustion chamber. The first mode and the second mode may provide different first valve opening durations to reduce vacuum in the combustion chamber.

Description

technical field [0001] The present invention relates to engine components, and more particularly to systems and methods for reducing oil entrainment into combustion chambers of engine components. Background technique [0002] The statements in this section provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Internal combustion engines combust a mixture of air and fuel within cylinders to generate drive torque. The flow of air and fuel into and out of the cylinders can be controlled by a valve train. The valve train may include a camshaft that actuates intake and exhaust valves and thereby controls the timing and amount of air and fuel entering the cylinders and exhaust exiting the cylinders. The engine's pistons may remain in the cylinders under conditions where fuel is no longer being supplied to the engine, such as during deceleration (eg, braking) to reduce fuel consumption, during operation of a hybrid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02
CPCF02D13/08F02D17/02Y02T10/12
Inventor C.P.内兰德
Owner GM GLOBAL TECH OPERATIONS LLC
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