HORSE B20 Engine Brings Waterproof Capability to Hybrids

HORSE B20 Brings Waterproof Capability to Hybrid Vehicles

On September 8, Horse Powertrain introduced the HORSE B20, a fully waterproof gasoline engine developed to expand the all-terrain capabilities of hybrid vehicles. The engine is intended for hybrid applications including SUVs and pick-up trucks, while supporting HEV, PHEV, and REEV configurations. Its IPX8 waterproofing compliance allows the engine to operate at depths of up to 1.1 meters. The development gives hybrid powertrains a powertrain option designed for demanding operating environments where water exposure can be a significant consideration.

HORSE B20 Specifications and Hybrid Applications

Weighing 130kg, the HORSE B20 uses a four-cylinder, 2-liter inline gasoline engine architecture. It combines turbocharging with direct injection and can produce between 140kW and 185kW of power, with torque ranging from 300Nm to 380Nm. The engine is designed for HEV, PHEV, and REEV applications, allowing it to serve multiple hybrid powertrain configurations. Its combination of relatively low weight, turbocharged performance, and broad hybrid compatibility supports applications requiring a gasoline engine capable of delivering substantial output within different electrified vehicle architectures.

Miller Cycle Supports 48.4% Brake Thermal Efficiency

The HORSE B20 uses an advanced Miller cycle to support a brake thermal efficiency of 48.4%. Its combustion system includes high-pressure injectors and high-tumble intake ports, while the pistons are designed to make full use of the “squish” effect to promote air-fuel mixing at the peak of the compression cycle. These technologies are integrated into the engine's combustion strategy to support efficient operation while maintaining the performance levels required for hybrid vehicle applications. The design therefore combines combustion efficiency with the output range needed across HEV, PHEV, and REEV powertrains.

Waterproof Design Enables 1.1-Meter Operating Depth

The engine's waterproof capability is based on a fully sealed structure developed to achieve an IPX8 rating. The system incorporates torsional vibration dampers and dedicated engine-transmission sealing to maintain protection against water intrusion. With compliance to IPX8 waterproofing standards and an operating capability of up to 1.1 meters, the HORSE B20 is designed for applications where vehicles may encounter substantial water exposure. This construction is particularly relevant to all-terrain hybrid vehicles, including SUVs and pick-up trucks, where powertrain protection can be important under challenging operating conditions.

Aluminum Block Integrates the Exhaust Manifold

The HORSE B20 also incorporates a gantry-type aluminum block with an integrated exhaust manifold. This component design forms part of the engine's broader effort to combine its combustion, structural, and sealing requirements within a compact powertrain package. Alongside the integrated exhaust manifold, the engine uses the previously described high-pressure injection, high-tumble intake, piston squish-effect, and Miller cycle technologies. Together, these features define the technical architecture of the engine while supporting its stated performance range and waterproof construction for hybrid vehicle applications.

Industry Impact & Outlook

The HORSE B20 could broaden the range of hybrid powertrains available for vehicles operating in environments where water exposure and all-terrain capability are important considerations. Its IPX8 rating, 1.1-meter operating depth, and compatibility with HEV, PHEV, and REEV configurations give Horse Powertrain a differentiated engine proposition for SUVs and pick-up trucks. The combination of 48.4% brake thermal efficiency and outputs reaching 185kW may also support applications where efficiency and performance must coexist. Further adoption will depend on how vehicle manufacturers integrate the engine into specific hybrid architectures and applications.

Frequently Asked Questions

What is the HORSE B20 engine designed for?
The HORSE B20 is a fully waterproof four-cylinder gasoline engine designed for hybrid vehicle applications, including HEV, PHEV, and REEV powertrains. It is intended for vehicles such as SUVs and pick-up trucks requiring all-terrain capability. The engine complies with IPX8 waterproofing standards and can operate at depths of up to 1.1 meters. It produces 140kW to 185kW of power and 300Nm to 380Nm of torque, while its Miller cycle supports a brake thermal efficiency of 48.4%. Its sealed structure also incorporates dedicated engine-transmission sealing and torsional vibration dampers.