What are the adjustable angles and locking types available for VVT phase adjusters?
Category: Company News
Release time: 2025-12-19
Overview: The adjustment angle of the VVT phase shifter is measured in crankshaft angle (CA) units, and the locking mechanism is compatible with the mainstream hydraulic vane-type structure.
I. Core Adjustment Angle (Compatible with mainstream models from 1.0T to 2.5L)
| Product Series | Adjustment angle range (crankshaft rotation angle) | Compatible Models / Scenarios | Adjust response speed |
|---|---|---|---|
| Standard type on the intake side | 0°~50°C (commonly 40°~45°C) | Naturally Aspirated / Turbocharged Gasoline Engines (such as Volkswagen EA211, Geely JLγ) | ≤100ms |
| Compact on the exhaust side | 0°~35°C (commonly 25°~30°C) | Hybrid/Diesel Engine Exhaust VVT System (e.g., BYD Xiaoyun Hybrid) | ≤120ms |
| Wide-range adjustable | 0°~60°CA | High-performance engines / OEM-customized requirements | ≤90ms |
Note: The angle range can be customized according to the OEM’s requirements, with a minimum adjustment accuracy of 0.1°CA, meeting the emission and fuel consumption optimization requirements of China VIb standards.
II. Locking Types and Technical Features
Shangchuan Technology employs hydraulic locking technology; the mainstream types are as follows:
1. Initial position locking (single-sided locking)
Structure: Spring-driven locking pin, which locks in the maximum lag/advance position (default lag position) when the engine is shut down.
Advantages: Low cost, high reliability, and suitable for mid-to-low-end mass-produced models (such as Great Wall 1.5T and General Motors 1.3T).
Application: The mainstream configuration of the intake-side phase shifter prevents phase misalignment and noise during startup.
2. Middle-position locking (high-end customization)
Structure: Dual locking pins + hydraulic pressure control, allowing locking at any position within the 0° to maximum angle range (e.g., 20°CA).
Advantages: Smoother cold starts and faster warm-up times, suitable for hybrid and high-performance engines (such as BYD DM-i and Volkswagen EA888 Gen4).
Technical Highlight: Locking accuracy of ±0.5°CA, certified by BorgWarner, and used in joint R&D projects with international automotive manufacturers.
3. Emergency Locking Function
When the oil pressure is too low, the system automatically locks into a safe position to prevent the valves from colliding with the pistons, thereby enhancing system redundancy.
III. Supplementary Key Technical Parameters
Locking mechanism material: Surface anodized treatment (HV500+), with a wear-resistant lifespan of ≥1000 hours in durability testing.
Oil pressure adaptation range: 3 bar to 8 bar (compatible with mainstream engine oil pressure standards).
Compatible OCV valve types: side-mounted / center-mounted, supports PWM control, and is compatible with valve bodies from suppliers such as Bosch and Continental.
Keywords: What are the adjustable angles and locking types available for VVT phase adjusters?
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