Some preliminary results concerning performance improvement of a two-cylinder automotive engine, are here reported. This has been obtained through a revised version of a variable valve-timing system, whose early prototype had already been implemented on a single-cylinder engine. The updated device, which operates on the basis of a hydraulic working principle and is electronically controlled by means of a high-speed solenoid-valve, has been placed in the kinematic chain of the original valve-timing system of the engine, in order to modify only the closing features of the intake-valve. The major aim of this practice is to obtain some torque gain, especially at low revolution speeds, by selecting the most suitable intake-valve timing in all operating conditions

Variable intake-valve closing as a means to improve the s.i. engine torque-characteristic / Nuccio, Patrizio; Marzano, MARIO ROCCO; Bronuzzi, Fabrizio. - STAMPA. - (1992). ((Intervento presentato al convegno 3rd International Conference on Innovation and reliability in automotive design and testing tenutosi a Firenze nel Aprile.

Variable intake-valve closing as a means to improve the s.i. engine torque-characteristic

NUCCIO, Patrizio;MARZANO, MARIO ROCCO;BRONUZZI, Fabrizio
1992

Abstract

Some preliminary results concerning performance improvement of a two-cylinder automotive engine, are here reported. This has been obtained through a revised version of a variable valve-timing system, whose early prototype had already been implemented on a single-cylinder engine. The updated device, which operates on the basis of a hydraulic working principle and is electronically controlled by means of a high-speed solenoid-valve, has been placed in the kinematic chain of the original valve-timing system of the engine, in order to modify only the closing features of the intake-valve. The major aim of this practice is to obtain some torque gain, especially at low revolution speeds, by selecting the most suitable intake-valve timing in all operating conditions
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2499832
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