IHI Turbo Turbocharger

IHI Turbo Turbochargers: Precision Forced Induction from a Global OEM Leader

When it comes to turbochargers that carry genuine OEM pedigree, few names carry the weight of IHI Turbo. Founded in 1959, IHI has grown into one of the world's most prolific turbocharger manufacturers, and supplies a wide range of turbochargers from small ones for automobile engines to large ones for land and marine power generators, having already produced more than 100 million turbochargers for automobiles. That scale of production is a testament to the trust automakers and engine builders place in IHI's engineering.

The RH-Series: A Foundation of Performance and Reliability

At the heart of IHI Turbo's turbocharger lineup sits the flagship RH Series, which spans the RHF, RHS, and RHZ product families. The excellent performance and reliability of the RH-series turbochargers represents the application of state-of-the-art technology to meeting today's market needs, and these highly regarded units have found application in the automotive, heavy truck, marine, construction machine, and industrial engine markets.

The RHS and RHZ series turbochargers incorporate advanced technologies developed by IHI and were designed to meet today's stringent market requirements. The RH series are available with mixed-flow and radial-flow turbines and an advanced bearing structure, designed to satisfy increasingly strict emission regulations while achieving high-pressure ratios, long service life, and high efficiency. Notably, RHS and RHZ turbochargers are designed to be interchangeable with the preceding RHF series, making them a practical upgrade path for existing applications.

The latest RHZ series pushes the envelope even further. The RHZ turbocharger achieves a wider operating range, higher pressure ratio, and higher efficiency by increasing the compressor speed, strengthening the structure, and revising the turbine blade shape. Response has been improved by reducing the inertia of the rotating elements — turbine, shaft, and compressor — while employing low-friction bearings compatible with low-viscosity oil, making the turbocharger as a whole more compact and lighter while balancing the conflicting demands of performance and strength.

Wastegate (WG) and Variable Geometry (VGS) Technologies

IHI Turbo offers turbochargers across two key boost-control architectures. WG turbochargers made by IHI are available in a wide variety of sizes covering an engine power range from 40 to 300 kW per turbocharger, running on bearings with very low friction and available with mixed-flow turbine wheels and highly efficient compressors. To further reduce fuel consumption and emissions, IHI also offers multi-flow turbines in addition to the single-flow turbines available on a standard basis.

On the variable geometry side, VGS turbochargers made by IHI are available in a wide variety of sizes covering engine power ranges from 70 to 300 kW per turbocharger, with the movable guide-vane mechanism designed in cartridge form to improve manufacturability and installation — a system known for its very high reliability. IHI even offers the RHV*EX series, which is the world's only turbocharger for commercial vehicles equipped with a VGS for Exhaust Brake, a critical safety feature in medium- and heavy-duty trucking.

Engineering Excellence Built Into Every Unit

What separates IHI Turbo's turbochargers from generic replacements is the depth of engineering behind each unit. Design for optimum bearing stability, oil seal performance, and thermal resistance in conjunction with strict quality control ensure high reliability and excellent field life, while the use of advanced aerodynamic design for turbine and compressor wheels — along with minimized mechanical loss and low inertia — generates superior performance including high flow rates, wide operating ranges, and excellent response.

IHI turbochargers have been designed, manufactured, and utilized on a full range of diesel, gasoline, fuel cell, and natural gas applications for the passenger car, agricultural, industrial, marine, commercial truck, and military markets. Whether you are replacing a worn OEM unit or seeking a performance-matched fitment, browsing the full selection of IHI Turbo turbochargers is the natural starting point.