T/JSAS 049-2023 Active Group standards

T/JSAS 049-2023 Variable Valve Timing System Drive Unit

Publish Date: 2023-11-27 Implement Date: 2023-11-28 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JSAS 049-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Automotive electronics, electrical equipment, and instrumentation

ICS Name: \nBoosting air injection, intake/exhaust pipe system

Publish Date: 2023-11-27

Implement Date: 2023-11-28

Scope

Scope: This document specifies the terms and definitions, product classification, requirements, test methods, inspection rules, marking, packaging, transportation, and storage requirements for actuators used in variable valve timing systems for automotive engines. This document applies to actuators for variable valve timing systems in automotive engines (hereinafter referred to as VCPs). Main technical content: The following terms and definitions apply to this document. 3.1 Actuator A phaser mechanism that changes the direction of oil supply in the internal oil circuit through an OCV, thereby driving the camshaft phase to increase or decrease. 3.2 Adjustment angle The maximum angle that the rotor can turn from its initial position after the locking pin is unlocked. 3.3 Locking pin clearance The maximum angle at which the locking pin can rotate in the locking groove. 3.4 Unlocking pressure The minimum oil or air pressure required for the locking pin to descend to the unlocking position without friction, allowing the rotor to freely rotate. 3.5 Friction torque The resistance torque generated by friction during the rotation of the VCT rotor. 3.6 Leakage rate The amount of oil leakage measured under specified conditions of oil viscosity, pressure, and rotor angle, from the early-angle oil channel to the late-angle oil channel under atmospheric pressure, or from the late-angle oil channel to the early-angle oil channel under atmospheric pressure. 3.7 Advanced chamfer A chamber formed by the front and rear covers and the stator and rotor in a VCP, which prompts the rotor to rotate toward an advanced phase after being filled with oil. 3.8 Retard chamfer A chamber formed by the front and rear covers and the stator and rotor in a VCP, which prompts the rotor to rotate toward a retarded phase after being filled with oil. 4. Product classification 4.1 Structural type A — Blade type