Hatz believed the time had come to rethink the classic industrial diesel engine and with the release of the H-Series three- and four-cylinder diesel engines with power up to 64kW (87hp) they achieved just what the future requires
Hatz took on the task of redefining industrial diesel engines fitted to small and medium-sized machines when it developed its H-series.
And while the Hatz H-series engines carries the most progessive design on offer, it incorporates the company’s long-standing expertise and fundamental inventions, such as the flat-seat injection nozzle of 1926 that continues to influence developments in diesel technology.
And Hatz breakthroughs such as the first industrial diesel engine made out of aluminium in 1958, something that became an industry-wide standard, but not for many years later with other brands.
These milestones only mark two of Hatz’s many technical innovations and are mentioned as the engine specialist has once again set an industry-wide standard with H-Series three- and four-cylinder diesel engines.
Hatz engines in the H-Series do in fact constitute a completely new diesel drive generation, that elevates off-highway
applications to the very next evolutionary level.
These three- and four-cylinder diesel engines achieve much more than previous generation engine, such as higher specific power, they provide efficiency and torque with less displacement, have a lower weight, smaller size, lower fuel consumption and lower emissions.
The H-Series engine class was achieved by adhering to a consistently implemented down sizing principle combined with a build from world-best components.
These include sturdy, highly effective turbochargers and Bosch’s special off-highway common rail injection system.
Other components, for example from Mann+Hummel, Mahle, Behr and also from Kolbenschmidt/Pierburg, are top-quality supplements to the Hatz engine design, all included in a design that gives Hatz the leading standard.
Hatz’s H-Series is best described as a one engine family with two platforms, both three- and four-cylinder models.
The three- as well as the four-cylinder engines are based on the same basic design with a thin-wall cast cylinder crankcase, a die-cast aluminium cylinder head with cross-flow cooling and the OHV two-valve concept with a decentralised injector position.
The Hatz H-Series product range includes various derivatives and development levels of the two basic engines in order to provide the ideal engine for almost every machine type.
This gives OEM machine manufacturers a great deal of choice when it comes to power versions, emission classes or engines with special casings for weather protection and noise insulation.
A total of eight engine variations are available in the Hatz H-Series, with drive machines offering up to 64kW (87hp) of power and fitted with the cleanest and most cost cutting run technology.
As to the lowest emissions levels, these clean engines are designed to comply with US/Tier 4 final and EU Stage V, in force since 2019.
Several aspects were decisive in this regard.
One of them was the very low vibration level of the drive, and to the credit of Hatz engineers, that was realised despite deliberately dispensing with a balancer shaft.
As a result, it was possible to keep the size and weight down, and to minimise friction losses along with lower fuel consumption and associated CO2 emissions.
The intelligent Hatz Advanced Combustion Strategy (iHACS) adopted by Hatz engineers has been crucial in lowering raw emissions.
This involves special combustion chamber geometry, combined with individually defined injection patterns, gas exchange and optimised exhaust gas recirculation.
Other considerable advantages to the iHACS combustion procedure include particulate filter adaptation.
The highly efficient combustion procedure with its low fuel requirements promotes extremely low soot input while the minimal oil consumption leads to reduced ash input into the filter.
This facilitates lengthy intervals between the active regeneration cycles with little influence on overall fuel consumption and realises very long service lives before ash scrubbing becomes necessary.
Together, these advantages cut overall operating costs.
The power class of the entire H-series is achieved with the help of a mechanical wastegate turbocharger and intercooler. The engine’s highly compact design is one result of this technology.
Because of the engines’ enormous power and high torque, machine manufacturers can use the Hatz H-series in models they previously fitted higher displacement systems.
The turbocharged three-cylinder 3H50 TICD engine with intercooler and 1.5-litre displacement is proof that more than enough power is available. It already reaches its high torque of 200Nm at 1700rpm, and in many cases that even exceeds the torque of older 6kW 76hp) engines.
In addition, there are H-series models under 19kW (26hp), without an intercooler, that deliver a very high torque of 130Nm at 1300rpm and as a result encroach on the former 19 to 37kW (26 to 50hp) class.
This means torque-intensive applications, such as hydraulic hoisting, are no problem.
In addition, noise emissions have been slashed compared to conventional engine solutions without a turbocharger, due to the low speed of the Hatz engine.
Another achievement for the Hatz H-series engine platform, through DPF regeneration, is the automatic shut-down of one (3H50 TICD) or two (4H50 TICD) cylinders during standstill regeneration.
This is the first use by Hatz of automatic cylinder shut down in industrial diesel engines in this power class.
The design of the Hatz H-series engine platform is distinguished by its durability, power, compact size and easy maintenance.
This is all to the benefit of machine manufacturers and operator with a range of three- and four-cylinder models.
These models are designed for a wide variety of uses that provides a drive solution for almost every small to medium engine.
Further model specs and information is available from www.hatz.com.au