Evrard equips its Alpha evo self-propelled sprayers with more powerful engines and better traction

To comply with the Tier3b emission standards, Evrard is introducing two new Deutz engines of 217 and 245 ch on its "Alpha evo" self-propelled sprayers.
These 6-cylinder engines are turbocharged with an intercooler and a particulate filter (DPF). Note that the 3500 and 4100 litre Alpha evo models will nevertheless keep the 175 ch Tier3a "Easy-Drive" engine until the end of September 2014 (for deliveries).

The other changes concern traction, with resized hydraulic pumps and electronic wheel-slip control ("SAPE" and "Diff-Lock" systems).

The power increase and the use of an engine meeting the TIER3b standard (Deutz engine of 217 and 245 ch) come with an increase in the capacity of the variable-displacement Sauer pump used for the hydrostatic drive.

One 165 cm3 pump now equips the 25 km/h versions, and two 115 cm3 pumps equip the 40 km/h versions.

The 4 hydraulic wheel motors incorporate a parking brake and 3 speed ranges.

This new transmission, called "EcoDrive" and of Poclain origin, is said to offer fuel savings, a lower noise level in the cab and a much wider operating range for the Deutz engine. The EcoDrive function optimizes engine speed according to the load and the required speed.

Technically, the engine speed during transport in the EcoDrive version will be approximately 1400 tr/min for the 40 km/h version and 1600 tr/min for the 25 km/h version.

An anti-slip system on the new Evrard Alpha evo self-propelled sprayers

In addition to these developments, Evrard also offers an electronic anti-slip system.

Available as an option on the 25 and 40 km/h versions, the SAPE monitors the rotation speed of each wheel and, where necessary, limits the hydraulic supply to the wheel or wheels whose speed is higher than the others (slipping).

The oil flow is therefore distributed to the wheels whose grip conditions allow the sprayer to maintain its forward speed.

The Diff-Lock system to get out of difficult situations

In addition, and available only on the 40 km/h versions, the Diff-Lock system is an electronically controlled hydraulic block that allows the hydrostatic circuit to be split.

In standard use, the flows of the two hydrostatic pumps are combined to supply the four wheel motors. When Diff-Lock is engaged, the flow of each pump is allocated to the motors of one axle, producing an inter-axle differential lock effect.