Importance

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Abstract

A mobile machine such as a tractor has an engine and hydraulic supply system including a pump supply with a pump (MP) driven by the engine to provide a pressurized fluid at a pump supply pressure PSP. The hydraulic supply system has an electronic load sensing system (E-LS) to regulate the pump supply pressure. The E-LS is arranged to increase a stand-by pressure differential of the pump supply once the engine is determined to be running following start-up. This enables the hydraulic supply system to be configured with a reduced hydro-mechanically defined stand-by pressure differential so that it places a reduced load on the engine when it is started. The E-LS may be arranged to inhibit LS control of the pump supply when the engine is started, with LS functionality only commenced once the engine is running. Reduced load on the engine during start-up can improve cold starting.

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First Claim