Single-Stroke Engine

AMPERe has designed, built and is now optimizing the world’s first single-stroke internal-combustion engine. This engine design can be configured for fuelling utilizing gasoline, diesel, natural gas or even hydrogen and the engine package is both compact and structural. In a few words, the single-stroke internal combustion engine is the engine where every stroke is the power stroke.


The single-stroke internal combustion engine performance characteristics compare well to today’s top-line automotive gasoline fuelled engines:

  • is 55% efficient — vs 32% for current typical ICE

  • has 90% fewer parts — reduced complexity / improved maintainability

  • reduces negative substances by 80%

  • has 10 times improved durability

  • has 500% improved power to weight ratio

  • is estimated to cost about 50% less to construct

  • can easily integrate for use in current applications

The history of the Single-Stroke Engine

AMPERe has started working on research and development of the Single-Stroke engines over 20 years ago as a personal project of the inventor.


To make this engine a reality, the inventor would eventually construct and improve more than 400 engines, which he divided into 3 generations. It was through constant research that the JabFly 240CC and JabFly 480CC two-stroke boxer engines emerged. After a thorough examination and analysis of the engines at the Silesian University of Technology, in 2013 the two-stroke engine received a rating of: “The best engine in the world in its class.”

The crowning achievement, however, is the “Single Stroke” engine with a working prototype rEV-r1 Mk 0.5 built-in 2014.


The rEV-r1 Mk 0.5 engine has unprecedented engine efficiency at 55% or above. The engine’s design allows for never before achievable “water injection powering” without harm done to engine components, radically decreasing the amount of fuel use (even up to 50%), significantly increasing horsepower, and significantly decreasing the number of harmful emissions into the atmosphere. The engine is not only energy-efficient, but it is also inexpensive, and it is composed of only a few yet safe components, making it incredibly eco-friendly. Intensive work is being done for the 2nd prototype of this revolutionary engine.

rEV-r1 SS Mk 0.5 Prototype

December, 2014

The first prototype was completed at the end of 2014. During the tests, the analytical and experimental critical function and data were collected. The first prototype was a successful proof of concept.

Prototype Specifications:

Displacement: 800 cc
Weight: 22 kg / 48 lbs

Structure # of parts: 12

Horsepower output: 150 hp

Torque (fl-lb): ~210@3200 rpm

Power output: 111 kW

Stroke: 98 mm / 3.85 inch

Bore: 102 mm / 4.01 inch

rEV SS-r1 Mk1 Prototype

March, 2019

The second prototype has been designed in 2017, the manufacturing began at the end of 2018 and was completed in March of 2019. The AMPERe team has begun validation in a laboratory environment. Basic technological components have been integrated to establish that they will work together. Activities include the integration of "ad hoc" hardware in the laboratory.

Prototype Specifications:

Displacement: 2666 cc
Weight: 85 kg / 187 lbs

Structure # of parts : 24

Horsepower output: 260 hp

Power output: 193.8 kW

Stroke: 80 mm / 3.14 inch

Bore: 102 mm / 4.01 inch

rEV SS-r1 Mk2 Prototype

May, 2019

The team has worked on optimizing the rEV SS-r1 Mk1 and the result is the new prototype rEV SS-r1 Mk2. The new optimized engine was also equipped with ultralight carbon fibre crankcase. The engine will be tested in the laboratory environment in August 2019.

Prototype Specifications:

Displacement: 3666 cc
Weight: 65 kg / 143 lbs

Structure # of parts : 28

Horsepower output: 350 hp

Power output: 260 kW

Stroke: 120 mm / 4.72 inch

Bore: 102 mm / 4.01 inch

rEV SS-r2 Mk3 Prototype

July, 2019

The redesigned version of this engine based on one of the early patents for the aviation applications. The engine will be tested in the laboratory environment in August 2019.

Prototype Specifications:

Displacement: 500 cc
Weight: 12 kg / 26.4 lbs

Structure # of parts: 9

Horsepower output: 56 hp

Power output: 41.7 kW

Stroke: 44 mm / 1.73 inch

Bore: 66 mm / 2.59 inch

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