C/M Valve. Sequencing EESM's for Sound

 C/M Valve. Sequencing EESM's for Sound

VALVE SEQUENCING 

Accelerant & Decelerant. Ev Motor speed management & speed + force based sound with functional cooling hybrid effects aiding in the cooling + heat sink effort

Sequencing to acheive V spec 8 - 12 sounds from based on acceleration

FIRING ORDER

Firing order (valve sequencing) gives that sound people are accustomed to that sounds fast (fast is a multi-faceted variable of acceleration & speed)

https://youtube.com/shorts/8_372dZt7Rw?si=eZiBdFtKUIsb3hVU

Valve sequencing for Electrically Excited Synchronous Motor (EESM) cooling typically involves managing a hybrid system that directs oil or water-glycol coolant to the stator and rotor based on real-time thermal demands. Unlike Permanent Magnet Synchronous Motors (PMSMs), EESMs generate significant heat in both the stator and the rotor due to the excitation current, requiring a more complex, multi-stage cooling strategy. 

Typical Valve Sequencing Strategy
The cooling control system generally operates in a specific sequence to manage thermal hotspots, prioritizing components based on speed and load: 

• Low Speed/High Torque (e.g., Acceleration): The primary focus is on cooling the stator windings and the rotor field windings.

• Valve Seq: Open flow path to stator water jacket for massive heat extraction.

• Valve Seq: Activate direct oil spray or jet to stator end-windings.

• High Speed/Low Torque (e.g., Highway Cruising): The focus shifts to rotor cooling, as rotational losses and centrifugal forces make rotor heat management more critical.

• Valve Seq: Modulate valves to increase oil flow to the hollow shaft for direct rotor cooling.

• Valve Seq: Reduce or bypass stator cooling if temperatures allow to minimize drag.

• Maximum Power (Peak Load): Simultaneous cooling of all components.

• Valve Seq: Maximum flow rate to stator, rotor, and inverter/gearbox. 

Key Components of EESM Cooling Control

• Direct Oil Cooling (Rotor): Oil is pumped through a hollow shaft to cool the rotor windings directly from the inside.

• Indirect Water Cooling (Stator): Water-glycol circulates through a water jacket in the stator casing.

• Valve Actuators: LIN BUS or PWM-controlled actuators are used for precise regulation.

• Thermal Sensors: Real-time data dictates the sequencing to prevent demagnetization or insulation breakdown. 

Sequence of Operation Example

• Startup: Cooling system is off or at minimum flow to allow rapid warm-up.

• Driving: As temperature sensor thresholds are met, the pump activates, and the stator valve opens (water loop).

• High Load/Speed: As rotor temperature increases, the rotor oil valve opens, increasing flow to the shaft.

• Shutdown: Post-cooling sequence might run to manage residual heat. 

This active management allows EESMs to operate at higher current densities—specifically increasing from 5.05 to 10.1 A/mm² in some studies. 

THE V8 STANDARD. SOUND. EESM + WIND-TUNNEL PISTON-PUNCH 

We can use a Wind-Tunnel Piston-Punch for different purpose. Idle & Motion. We can also pair it to pistons voiding combustion for Air Compression with equal or higher PSI 

Licence fee. Usage rights. Royalty per unit sold. 

Noice. (References a vintage Television Series)

Push button perpetual. No Fuel. No Charging. Can have Hydrogen as an Emergency back-up 

Discussions on thermal management in electric vehicles (EVs) usually focus on the battery because of the risk and potential consequences of thermal runaway. However, keeping motors comfortable in terms of temperature is also crucial to the performance, reliability, efficiency and longevity of an EV’s powertrain. E-motors generate significant heat from resistive losses in the windings, hysteresis and eddy current losses in the stator and rotor cores, and friction in the bearings. Furthermore, power and torque outputs, duty cycles, environmental conditions and location within the vehicle can also combine to make the process of removal of unwanted heat surprisingly complex. Over the past five years, however, the landscape of e-motor cooling technologies has witnessed significant advances.

Cool trends

One of the most notable trends is the integration of multiple coolant circuits. Nathan Stephens, chief engineer and head of technology at Grayson Thermal Systems, emphasises that, “The drive to connect EV motor coolant circuits to other coolant loops such as those for power electronics and power distribution into a complete thermal management system is one of the most significant advancements for increasing efficiency and performance.” This integrated approach allows for intelligent heat management, where waste heat can be employed strategically for other purposes. Stephens highlights that such systems “can now harvest the heat generated from EV traction motors and redirect it to the inside of a vehicle to improve passenger comfort.” This reduces reliance on energy-intensive auxiliary heating systems such as heat pumps or electrical heaters, leading to improved energy efficiency and extended driving range, particularly in colder climates.
Parker Lord has focused on enhancing heat transfer at the component level through innovative material science. Business development manager Eric Wyman, points to the significant impact of “end-winding potting with thermally conductive two-component pottants.” This technique involves encapsulating the motor’s end windings with a specialized material that exhibits high thermal conductivity, facilitating a more efficient pathway for dissipation of heat from the windings to the stator housing. Wyman explains that “ensuring efficient cooling of the motor can allow for smaller motors with higher output, saving weight and expense,” because effective thermal management permits higher power densities without exceeding critical temperature limits. This reduction in the size and weight of the motor directly contributes to improved vehicle efficiency and handling.

https://www.emobility-engineering.com/thermal-management-in-electric-vehicles-e-motor-cooling-technology/

Irrelevant Relevance 

Bugatti 

https://youtu.be/Mf4Sb__eeto?si=g2cGDUu8LyBu5XbB

K-4

https://youtube.com/shorts/umDY6HJOTgs?si=2ia7VG0k6OX6S-yS

CITY