Onboard device and method for checking diesel exhaust fluid quality
AssigneePerkins Engines Company Limited
InventorsDaniel Fitch, Mark Philip Aldred, Ivan Rogers
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Abstract
The present invention pertains an onboard device for checking the quality of DEF in a work machine, comprising a flow channel configured to fluidly connect a DEF inlet with a DEF tank. The flow channel comprises a DQS configured to be brought into contact with DEF passing through the flow channel. The present invention also pertains to a method of checking the quality of DEF comprising the steps of tilling DEF into a flow channel configured to fluidly connect a DEF inlet with a DEF tank; and checking, by means of a DQS, the quality of the DEF in the flow channel.
Claims16
An onboard device for checking the quality of diesel exhaust fluid (DEF) in a work machine, the onboard device comprising a flow channel configured to fluidly connect a DEF inlet with a DEF tank, characterized in that the flow channel comprises:
- a DEF quality sensor (DQS) configured to be brought into contact with DEF passing through the flow channel;
- and
- a flow channel bypass comprising a bypass valve and a bypass reservoir, the bypass valve being connected downstream of the bypass reservoir, relative to a direction of flow of the DEF, wherein the DQS is provided in the flow channel bypass, wherein the bypass valve is a standard-off valve.
A method of checking the quality of diesel exhaust fluid (DEF) using an onboard device of a work machine, the method comprising:
- receiving DEF with a flow channel of the onboard device, the flow channel being configured to fluidly connect a DEF inlet of the onboard device with a DEF tank of the work machine and the flow channel having a flow channel bypass and a bypass valve provided in the flow channel bypass, including filling the flow channel bypass with a portion of the DEF, as retained DEF;
- checking, using a DEF quality sensor (DQS) provided in the flow channel bypass, a quality of the retained DEF in the flow channel bypass;
- and
- opening the bypass valve to drain the retained DEF from the flow channel bypass into the DEF tank,
- wherein the DQS is provided downstream of the bypass valve, relative to a direction of flow of the DEF, and wherein the checking the quality of the retained DEF is performed after the step of opening the bypass valve.
Dependencies are inferred from the claim text.