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STAGE V REGULATION: Engines Between 19 And 37 kW (25 – 50 HP) Impacted

The next stage of EU emission standards comes in force in 2019 and 2020 for off-highway diesel engines across the power spectrum. Machines for Construction, Agriculture, and Material Handling will all be in the scope of the new standard.


One of the most impacted power ranges will be the engines between 19 and 37 kW (25 – 50 HP). Many of them will require technology such as common rail fuel systems and
exhaust after treatment devices such as Diesel Particles Filter or/and SCR. In short, OEMs will have to:
Adapt to tighter space constraints to install exhaust after treatment devices.
Manage the additional costs linked to those new devices.
Integrate the higher Total Cost Of Ownership(TCO) due to higher maintenance costs on Stage V engines mainly for Rental.
It is apparent that the engines between 19 and 37 kW will be the most impacted since their level of particulates emission will have to go from 0.6 down to 0.015 g/kWh, implying the usage of a Diesel Particles Filter.

One of the possible ways to minimize the impact of this regulation is to downsize the diesel engine used on the machine below the 19 kW threshold. When this is possible, it
has to be done without sacrificing machine performances.
To make this change possible, Poclain Hydraulics has been improving the efficiency of a great part of its hydrostatic transmission offering over the last five years. Hydraulic
loss reduction opens the door for diesel engine downsizing without compromising the machine performances.

First, the higher efficiency of Cam –lob technology versus high speed motor with gearbox brings a first gap in this quest of highly efficient hydrostatic transmissions. The
recent development of HighFlowTM motors, such as MS02, MS05 and MS08 HF reinforces this benefit, offering higher productivity with lower energy consumption. At constant speed, hydraulic losses of HighFlowTM motors are
reduced by 50% compared to the classic MS motors.

Second, the Poclain Hydraulics pump offering provides opportunities to further reduce hydraulic losses from the transmission. As a matter of fact, the brand new PM range
(PM50, PM30 and PM20) has been designed with higher volumetric and mechanical efficiency. In addition to this, the higher pressure capacity (up to 400 bar instead of 350 bar ) is opening new doors to overall hydrostatic transmission downsizing.

Last, but not the least, electronic control of hydrostatic transmissions gives more possibilities to ICE downsizing without sacrificing machine performances. For example, Electronic Anti-Stall or EcoDriveTM software functionalities will help end users to get the maximal productivity out of a
downsized engine machine.
To summarize, Poclain Hydraulics is ready to help its customers to face Stage V challenges. Thanks to brand new product offer, changes will be almost unnoticeable from a performance and cost perspective.

Source: Poclain Hydraulics, Ltd.