The 484Q - 12 - 450B is a dedicated exhaust Variable Valve Timing (VVT) component designed specifically for the
Haima S7, especially matching its HM484Q 2.0L naturally aspirated engine and HM484Q - T 1.8T turbocharged engine variants . As a core part of the engine's valve timing control system, it works with the intake VVT component to form the dual - VVT system of the HM484Q series engine, which is a key factor in ensuring the engine's reliable power output, fuel efficiency and low - emission performance .
Precise Exhaust Timing Regulation: It dynamically adjusts the opening and closing timing and duration of the exhaust valves according to the engine's operating conditions, such as idling, cruising, and acceleration. For instance, during high - speed operation, it advances the opening of the exhaust valves to reduce exhaust backpressure, which helps the engine release more power; during low - speed operation, it optimizes the closing timing to retain appropriate heat in the combustion chamber, improving the efficiency of fuel combustion .
Boost Power and Fuel Economy: By coordinating with the HM484Q engine's 150 - horsepower maximum output and 180 N·m peak torque parameters, this component ensures that the engine can output power smoothly at 6000 rpm (where maximum power is achieved) and 4500 rpm (where maximum torque is achieved) . The optimized exhaust timing reduces energy loss during the exhaust process, enabling the engine to convert more fuel energy into mechanical energy, thus enhancing both power performance and fuel economy in daily driving.
Reduction of Harmful Emissions: It ensures that the exhaust gas in the combustion chamber is fully discharged by optimizing the exhaust process. This minimizes the residue of unburned fuel in the chamber, thereby reducing the emission of harmful pollutants such as hydrocarbons and carbon monoxide. This aligns with the environmental protection requirements of modern automotive engines .
![484Q-12-450B]( "484Q-12-450B")
This VVT exhaust part is composed of several key components, each made of materials that suit the harsh working environment of the engine . The main housing is crafted from heat - resistant alloy, which can withstand the high temperature of over 600°C in the exhaust system without warping or deforming. The internal hydraulic control valve is made of precision - machined steel, ensuring accurate regulation of engine oil flow. The rotor vane assembly connected to the exhaust camshaft is made of high - strength aluminum, balancing structural strength and lightweight requirements. In addition, the part is equipped with a weatherproof ECU connector with gold - plated contacts. This connector guarantees stable signal transmission between the VVT component and the engine control unit and prevents short circuits caused by moisture or dust intrusion .
The component operates based on the coordination of hydraulic pressure and electronic control. The engine control unit (ECU) collects real - time data on the engine's speed, load, and other operating conditions, and then sends electrical signals to the hydraulic control valve of this VVT exhaust part . The hydraulic control valve then adjusts the flow rate and pressure of the engine oil entering the VVT mechanism accordingly. The oil pressure pushes the rotor vane assembly connected to the exhaust camshaft, changing the phase angle of the camshaft. This adjustment alters the opening and closing timing of the exhaust valves, achieving real - time optimization of the exhaust process to adapt to different driving scenarios .
This part is exclusively designed for Haima S7 models equipped with HM484Q series engines and is also compatible with Haima M8 . It is not suitable for other Haima models or vehicles of other brands due to differences in engine camshaft specifications, oil pressure requirements, and ECU communication protocols. As an original equipment manufacturer (OEM) part, it undergoes professional testing before leaving the factory . It has a one - year warranty period and can maintain stable performance for over 100,000 kilometers of driving when matched with regular maintenance such as using recommended engine oil . Using non - original alternative parts may lead to problems such as incorrect exhaust timing, engine misfires, and reduced power output.
![484Q-12-450B]( "484Q-12-450B")
As Hanma S7’s “exhaust timing regulator,” this precision component is made of durable alloy and heat-resistant materials. Mounted on the exhaust camshaft, it’s exclusive to Hanma S7 with 484Q series engines (confirm via VIN), matching the engine’s mechanical and electrical interfaces.
Key roles: Dynamically adjust exhaust valve opening/closing timing to optimize exhaust gas flow. This enhances engine power, improves fuel efficiency, and reduces emissions by refining combustion. Without it, the engine may suffer from poor acceleration, increased fuel consumption, or rough running.
It fits all Hanma S7 variants with 484Q engines but not other Hanma models, non-Hanma vehicles, or S7 with modified camshafts/engines.
Professional installation is recommended (involves camshaft access and timing calibration). Maintenance: Use manufacturer-recommended engine oil, inspect for oil leaks regularly, and scan for timing-related error codes periodically.
Original VVT exhaust components ensure precise timing control and durability—aftermarket ones risk timing misalignment, engine damage, or subpar performance.
![484Q-12-450B]( "484Q-12-450B")
Contact us
![484Q-12-450B]( "484Q-12-450B")
