Emerald K6+ ECU Explained

The Emerald K6+ Engine Management System represents a significant leap forward in programmable engine control. Unlike some of its competitors, an Emerald system arrives complete with a programmer's pack, software, and a communications lead, offering a comprehensive solution right out of the box. Designed to cater to a wide array of automotive needs, the K6+ ECU boasts impressive flexibility, capable of managing engines with up to 12 cylinders. Its advanced features are geared towards optimising performance, driveability, and efficiency, making it a top choice for serious tuners and motorsport enthusiasts.

Unpacking the Emerald K6+ ECU

At its core, the K6+ builds upon the already robust capabilities of the K6 ECU, introducing a suite of enhanced functionalities. For those seeking ultimate control over their engine's behaviour, the K6+ offers features such as Traction Control, Variable Valve Timing (VVT) control, and Drive-by-wire compatibility. It also provides advanced features like throttle blipping for seamless downshifts and flat-shifting capabilities, allowing for rapid gear changes without lifting off the throttle. This level of control is crucial for maximising performance in demanding driving scenarios.

Key Features and Capabilities

The versatility of the Emerald K6+ is evident in its extensive feature list. It supports up to 12 cylinders, with options for sequential ignition and injection for up to six cylinders. The system allows for triple live map switching, enabling drivers to change engine maps on the fly, adapting to different driving conditions or fuel types. Connectivity is also a strong point, with a USB port that can facilitate a Wi-Fi link to a phone or tablet device, offering real-time data monitoring and tuning adjustments on the go.

For engines utilising V-configurations, the K6+ offers twin Lambda inputs, crucial for accurate fuelling across multiple banks of cylinders. Load sensing can be managed via the Throttle Position Sensor (TPS), MAP sensor, or a combination of both. The system supports double injector control, allowing for more precise fuel delivery, especially at higher power outputs. Closed-loop fuelling, driven by a wideband Lambda sensor, ensures optimal air-fuel ratios for both performance and economy. Furthermore, the K6+ excels in boost control, offering adjustments based on different gears and even a dash-mounted override for on-the-fly boost increases. Over-boost protection and both hard and soft cut rev limiters are included to safeguard the engine.

Advanced Engine Management Functions

• Adaptive Mapping: Utilises wideband Lambda sensor data for real-time fuel map adjustments.
• Boost Control: Comprehensive control over turbocharger boost pressure, including gear-dependent settings and override functions.
• VVT and VVC Control: Manages Variable Valve Timing and Variable Valve Control for optimised engine breathing across the rev range.
• Drive-by-Wire (DBW): Compatible with modern electronic throttle control systems, including programmable pedal mapping.
• Throttle Blip & Flat Shift: Facilitates smoother gear changes, particularly beneficial in racing applications.
• Traction Control: Advanced system to manage wheelspin and improve acceleration.
• Launch Control: Optimised system for consistent race starts.
• Ignition & Injection: Supports sequential ignition and injection for up to six cylinders, with coil-on-plug capability.
• EGT Function: Integrated Exhaust Gas Temperature monitoring and control for engine protection.

Connectivity and Data Logging

The K6+ features a dedicated RS232 serial communications port and a Controller Area Network (CAN) interface, supporting the Version 2.0B protocol at up to 1Mbit/sec. This allows for seamless integration with data logging systems and aftermarket displays, such as those from AIM and Race Technology. The ability to log a vast amount of engine data is critical for performance tuning and diagnostics, providing invaluable insights into engine operation.

Physical and Environmental Specifications

The physical build of the Emerald K6+ is designed for durability and reliability. It measures 110 x 190 x 44 mm and weighs 491g. The ECU operates on a power supply range of 6.5v to 18v. Environmental protection is paramount, with an IP65 sealed enclosure and IP68 waterproof connectors, ensuring robust performance even in harsh conditions. This makes it suitable for a wide range of motorsport and performance applications where exposure to the elements is a concern.

Input and Output Capabilities

The K6+ is equipped with a comprehensive array of inputs and outputs to manage virtually every aspect of engine operation:

Inputs:

• Engine Speed Triggers: 3 inputs, configurable for inductive or digital sensors (crank, cam, distributor), with user-selectable trigger patterns.
• Air Temperature & Coolant Temperature: Standard Bosch or user-programmable characteristics.
• Barometric Pressure: Internal sensor for accurate atmospheric pressure readings.
• Engine Load: Utilises TPS and/or MAP sensor signals (0-5v).
• Lambda Sensor: Supports both narrowband (0-1v) and wideband (0-5v) signals.
• Road Speed: Up to 4 inputs, configurable for inductive or digital sensors, with software-switchable internal pull-up resistors.
• Other Inputs: Coded immobiliser input, exhaust gas temperature, oil/aux temperature, plus spare inputs assignable to functions like air conditioning requests, boost adjustments, map selection, and launch enable.

Outputs:

• Ignition Coil Drivers: 6 internal drivers, configurable for external amplifier control or direct coil control.
• Injector Drivers: 6 internal high-power drivers.
• Other Outputs: Air conditioning clutch, fuel pump relay, supply relay, two-stage cooling fan control, programmable tacho driver, oxygen sensor heater, shift light, boost control valve, variable cam control, cam switching, IACV control (various types), user-programmable outputs, and 5v sensor supply.

Emerald3D K6 ECU for Porsche Applications

AT Power has developed a specialised range of Shaftless Direct to Head Individual Throttle Body (EFI) systems, which can be paired with the Emerald3D K6 ECU for air-cooled Porsche models. This combination is particularly suited for models such as the Porsche 911, 914/6, 964, and 993. The Shaftless throttle technology, with its knife-edged butterflies, significantly enhances airflow, minimises separation, and reduces turbulence, leading to higher volumetric efficiency and improved throttle response. The close proximity of the throttle blades to the inlet valves results in a dramatic improvement in engine performance, including gains in horsepower, torque, and overall driveability.

These EFI installation kits for Porsches are supplied complete with Individual Throttle Bodies (ITBs), fuelling, vacuum, oil breather, air filtration, and heater systems. The optional Emerald3D K6 ECU package for these applications includes the ECU, a full electrical engine harness, all necessary hardware components, and the required software, often pre-loaded with a base map tailored for the specific Porsche model. This ensures a comprehensive and integrated solution for classic Porsche owners looking to upgrade to modern fuel injection and engine management.

Comparison Table: K6 vs. K6+

To highlight the advancements, here's a comparison of the K6 and K6+ ECUs:

Frequently Asked Questions

Q1: What information do I need to provide when ordering an Emerald K6+ ECU?
When ordering, you'll need to specify the intended application and use of the ECU. This helps in configuring the correct inputs and outputs and providing a suitable base map.

Q2: Can I wire the Emerald K6+ into my existing engine harness?
Yes, the Emerald ECU requires wiring into your existing engine harness, unless you have specific Peugeot ECUs (MM1AP 55-pin). Wiring services for loom adaptations are available.

Q3: Does the K6+ come with software and a communication lead?
Yes, unlike some other engine management systems, every Emerald system, including the K6+, comes with a programmer's pack, software, and a communications lead.

Q4: What is the advantage of Drive-by-Wire compatibility?
Drive-by-wire compatibility allows the ECU to control electronic throttle bodies, offering finer control over throttle response, cruise control integration, and features like throttle blipping.

Q5: Is dyno tuning recommended after installing an Emerald ECU?
Yes, it is highly recommended to have the system professionally dyno-tuned after installation to ensure optimal performance and to prevent potential engine damage.

Q6: What are the benefits of Traction Control on the K6+?
Traction control helps to manage wheelspin during acceleration, improving grip and allowing for more efficient power delivery, especially in adverse conditions or on slippery surfaces.

Conclusion

The Emerald K6+ Engine Management System is a powerful and highly configurable solution for anyone looking to take their engine's performance and control to the next level. Its extensive feature set, robust build quality, and comprehensive support make it a leading choice in the aftermarket engine management sector. Whether for road use, track days, or full-blown motorsport, the K6+ offers the precision and flexibility required to unlock an engine's true potential.