Waukesha, Wisconsin
Project Term:
03/15/2022 - 03/14/2025

Technology Description:

INNIO’s Waukesha Gas Engines will develop a new piston, liner, and head gasket design that dramatically reduces crevice volumes, the largest source of unburned fuel, in engine combustion chambers. The team will optimize a large-bore steel piston to achieve the same reciprocating mass as current aluminum pistons. The new technology will broadly apply to all natural-gas-fueled lean-burn engines and can be used to retrofit a fleet of existing engines with little-to-no increase in budgeted costs. The technology will reduce emissions of regulated pollutants such as carbon monoxide, volatile organic compounds, and formaldehyde, while nitrogen oxides will stay the same, meaning no emissions re-permitting will be necessary after installation. The new technology will reduce operating costs and is similar to existing components, meaning support technicians will not need to retrain.

Potential Impact:

REMEDY addresses methane emissions from domestic oil, gas, and coal value chains, accounting for 78% of U.S. primary energy.


REMEDY systems will reduce the environmental footprint from the production and use of domestic resources.


A key REMEDY process performance metric is to reduce net greenhouse gas emissions > 87% on a life cycle basis. This metric ensures that proposed solutions provide a holistic environmental benefit. If successful, REMEDY processes have the potential to reduce U.S. methane emissions by at least 60 million tons of CO2e (carbon dioxide equivalents) per year.


REMEDY goals call for 99.5% methane reduction while meeting a levelized cost less than $40/ton of CO2e.


ARPA-E Program Director:
Dr. Jack Lewnard
Project Contact:
James Zurlo
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Project Contact Email:

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