Auxiliary Power Unit – A22K

Auxiliary Power Unit – A22K is designed to provide electrical, pneumatic, and hydraulic power to vehicle subsystems without operating the main engine. It supports pre-mission preparation processes such as weapon and system testing, onboard diagnostics, and main engine cooling.

In emergency situations where the main engine is damaged or unavailable, the A22K enables selected systems to remain operational, preserving vehicle mobility and mission continuity. The system also supports sustained operation in deployment areas without access to fixed external power sources.

The A22K is developed for integration into a wide range of military platforms, including tracked and wheeled armored vehicles, tactical and support vehicles, stationary systems, and selected airborne applications. Typical platforms include main battle tanks, self-propelled artillery systems, armored and infantry fighting vehicles, armored personnel carriers, MRAP vehicles, rocket systems, shelters, tents, helicopters, and aircraft.

The system can be installed internally within sound-insulated compartments or externally on the vehicle structure, depending on platform layout, thermal dissipation requirements, and acoustic management needs.

Auxiliary Power Unit – A22K is engineered to support vehicles equipped with high-power electronic mission systems. By enabling silent mode operation with reduced acoustic and thermal signatures, the system minimizes reliance on the main engine and reduces fuel consumption.

The APU supports power configurations ranging from 2 kW to 20 kW and provides 24/28 VDC output as well as high AC and DC voltage options. Depending on operational requirements, the system can be configured with air-cooled or liquid-cooled diesel engine architectures.

The A22K is fully integrated with the vehicle’s fuel and control systems and draws fuel directly from the vehicle fuel tank, eliminating the need for a separate fuel tank or battery.

A key capability of the A22K is its co-generation operating mode. When operating alongside the vehicle’s main generator, the system continuously monitors onboard power demand and supplements power output to compensate for shortages caused by newly integrated mission equipment. This capability prevents the need for upgrading existing main generator systems.

Auxiliary Power Unit – A22K is equipped with an IP67-rated electronic control unit featuring a digital display. Operators can monitor real-time parameters such as temperature status, fuel level, pressure values, DC current, battery voltage, and system fault information.

The control interface supports both automatic and manual start options, allowing flexible and reliable system management across different mission profiles and vehicle operating states.

Auxiliary Power Unit – A22K is designed and tested in accordance with the following military standards:

• MIL-STD-461 for electromagnetic compatibility

• MIL-STD-810 for environmental durability

• MIL-STD-704 for power management and electrical compatibility

• MIL-HDBK-217 for reliability and life estimation

These standards validate the system’s performance and durability in harsh military environments.

Auxiliary Power Unit – A22K enables armored military vehicles to operate mission-critical systems independently of the main engine. It supplies power to onboard electronics, hydraulic and pneumatic systems, climate control units, weapon systems, communication equipment, fire suppression systems, power distribution units, and KBRN systems.

By supporting high electrical loads, reducing engine runtime, and maintaining silent operation, the A22K enhances operational efficiency, vehicle survivability, and mission endurance across diverse military platforms.