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Tumble system for the intake manifold of an internal-combustion engine provided with an actuator made with shape-memory material

A technology of transmission and conversion system, applied in charging system, internal combustion piston engine, fuel heat treatment device, etc., can solve the problems of heavy weight and large overall size, etc.

Inactive Publication Date: 2010-06-23
FAB ITAL MAGNETI MARELLI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such an arrangement also has a relatively heavy weight and, above all, considerable overall dimensions

Method used

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  • Tumble system for the intake manifold of an internal-combustion engine provided with an actuator made with shape-memory material
  • Tumble system for the intake manifold of an internal-combustion engine provided with an actuator made with shape-memory material
  • Tumble system for the intake manifold of an internal-combustion engine provided with an actuator made with shape-memory material

Examples

Experimental program
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Effect test

Embodiment Construction

[0015] exist figure 1 , reference numeral 1 indicates the entire internal combustion engine provided with four cylinders 2 (only one of which is shown in the figure), wherein each cylinder communicates with the intake manifold 3 through at least one intake valve 4 and communicates with the intake manifold 3 through at least one An exhaust valve 6 communicates with the exhaust manifold 5 .

[0016] The intake manifold 3 receives fresh air (i.e., gas from the external environment) through supply ducts 7 controlled by throttle valves 8 and passing through individual intake ducts 9 ( figure 1 Only one of them is shown in the figure) and communicate with the cylinder 2, wherein each intake pipe is controlled by a corresponding intake valve 4. Likewise, the exhaust manifold 5 passes through each exhaust pipe 10 ( figure 1 Only one of them is shown in the figure) communicates with the cylinder 2, wherein each exhaust pipe is controlled by a corresponding exhaust valve 6. From the ...

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PUM

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Abstract

A tumble system (13) for the intake manifold (3) of an internal-combustion engine (1) is provided with a number of cylinders (2). The tumble system (13) is provided with at least one throttle valve (14) for varying the section of passage of air through an intake pipe (9), which connects a cylinder (2) with the intake manifold (3). The throttle valve (14) has a throttle butterfly (15) mounted so as to rotate under the thrust of an actuator device (17) equipped with at least one actuator element (23), which is made of a shape-memory material that generates a torque by modifying its own geometryfollowing upon application of an external stress of a physical nature.

Description

technical field [0001] The invention relates to a tumble system for an intake manifold of an internal combustion engine. Background technique [0002] The internal combustion engine is provided with a plurality of cylinders, each cylinder being connected to an intake manifold via at least one intake valve and to an exhaust manifold via at least one exhaust valve. The intake manifold receives fresh air (i.e. air from the external environment) through a supply duct controlled by a throttle valve, and communicates with the cylinders through individual intake ducts, each of which The trachea is controlled by at least one inlet valve. [0003] Recently, the introduction of a conversion system designed to change the cross-section of the intake pipe according to the r.p.m of the engine itself (ie, the rotational angular velocity of the crankshaft of the engine) has been proposed. At low r.p.m, the cross-section of the gas passage through the intake duct is reduced, creating turbu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D9/08
CPCY02T10/146Y02T10/126F02B31/04F02M31/07Y02T10/12
Inventor N·贝拉托F·兰乔尼M·佩科拉
Owner FAB ITAL MAGNETI MARELLI SPA