RVCR Applications

Green fuel & Renewable energy Prime-movers

Motors and drive systems

Utilities : - Compressors/ Pumps; Hydraulic, Metering and Dosing devices


RVCR (a seed principle in mechanisms for enhanced energy conversion) has numerous downstream engineering applications. RVCR makes new breed of Primemovers for transport and energy sector applications. They include Green fuel (hydrogen) engines for powering land transport and maritime propulsion; Wind and Hydro motors for renewable energy power-generation; Fluid handling utilities for compressor, variable delivery pumps, metering devices for both domestic and Industrial uses.

Green fuel (I.C. Engine) Primemovers

Enabling VCR based feed-stock agnostic Engines with wide range VCR control

The Principle

This section contains technical details for those skilled in the art.

The reduction and increase in volume trapped between the piston vanes is used for compression and expansion. These are the essential thermodynamic gas processes in I.C.Engine. The other two processes are the heat addition and removal. All these processes can be explicitly achieved with RVCR kinematics. The animation depicts the Piston-vane sequence and the gas process. The gas forces are always directly transferred to the central output shaft through the sleeves.
RVCR combines the efficiency gains from ‘Positive Displacement’ and the Compactness of the rotary Mechanism. This new methodology is capable of delivering many new features and functionalities. The most important of them is VCR ‘Variable Compression Ratio’. VCR feature has been pursued for almost a 100 years by almost every global major but it has remained illusive. VCR is key to gaining quantum leap in efficiency and multi-fuel adaptability (real-time switching from fossil to green-fuels).

Process depiction

This CAD model animation depicts operation of exhaust valve, its drive chain and fuel injection.

The RVCR concept-based engine was conceived and its technology knowhow is developed. The sequential motion of piston requisite for Gas Processes in I.C. Engines is achieved in a smarter, compacter way with piston-vane pair. While one piston-vane set is rotating, it's counterpart performs the equivalent of an Cylinder head.
The conventional reciprocating motion of cylindrical piston is a source of major limitations and RVCR eliminates it. The RVCR piston-vane is radially fitted on the sleeve and eliminates linear reciprocating motion. The connecting rod, top end bearing (Gudgeon pin) and bottom end bearings are not present.

Salient attributes

RVCR is an entirely new way of warping the gas volume around as central shaft.
RVCR opens possibilities for never before features and functionalities. A few are listed below

  • thermodynamic prosses called Constant Volume Heat exchange (CVHE);

  • Direct torque transfer through the entire expansion process.

  • Real time wide range Variable compression ratio (VRC).

  • Multi fuel flexibility (Switching of fuels during operation).

  • uniform peak efficiency under all load conditions

  • Miniaturization by warping of gas volume around shaft;

  • Reduced operations costs by minimizing of component wear.etc.

The Implications

RVCR I.C. Engine technology is the technology with be capability to transform from fossil fuel use to green-fuels. It allows OEM's in transport and energy sector to device newer long term strategies for dealing with ever stricter emission regulations and achieve Zero Carbon goals.

RVCR attains VCR with easy ease with external controls. The ease of attaining wide range VCR is key to better combustion control. The combustion of different fuels in an I.C. Engine is one of the most challenging engineering design aspects. However, RVCR provides for large residence time for combustion at constant volume which makes this possible.

RVCR shall facilitate green-fuel enforceability without being in conflict with fossil-fuel economic structures, for a greener Industry ecosystem. RVCR I.C. Engine project is covered in the dedicated page under the opportunities section.

The Application Segments

We understand the RVCR technology best and how to customize it into segment specific technologies. The shift in the industry is towards greener options to reduce GHG emissions in engine Exhaust. The trend is in automotive sector is consistently moving towards electrification and hybrids. In the maritime and many land based applications we see the shift if towards clean fuels like LNG, CNG, Bio Fuels and Hydrogen etc.
We have priorotized the customization of RVCR knowhow for developing the technology for 450 to 600 Hp applications. This specification is duduced as the MVP 'minimum viable product'. This is with consideration to the wide range of applications it suffices. RVCR shall facilitate green-fuel enforceability without being in conflict with fossil-fuel economic structures, for a greener Industry ecosystem.

RVCR I.C. Engine project is covered in the dedicated page under the 'Current projects' section.

(RVCR Mechanism Schematic Representation)

Renewable energy motors

the methodology is about Converting flow energy in wind/hydro (Rivers, tidal) to pressure differential for driving RVCR +ve displacement motors

Turbine vs RVCR tech overview

The section contains technical details for those skilled in the art.

The axial flow wind turbines are rotary machines converting Wind energy into Power. The root principal differentiator between rotary and RVCR methods is in the wind force tapping method. Conventional wind turbines are driven by lift, achieved by aerofoiled profile of turbine blades. RVCR uses pressure differential between high wind velocity zone and ground level stagnant air conditions.

RVCR is the 1st in basing a wind motor on a rotary positive displacement mechanism.

The RVCR system deploys a Convergent divergent nozzle in the flow path of air rather than a turbine. This creates low pressure at throat of the Nozzle. An air stack connects the low pressure at nozzle throat to the RVCR wind motor exhaust.

The high pressure at lower altitude region is connected to the intake side. The air flow induced from the high to low pressure point passes through the wind motor by turning the piston vanes which seal any air leak past its sides.

This methodology cannot be deploy turbines for air slip between blades. Even placing reaction turbines with closely packed blades has issues with air varying differential pressures and flow . The complexities of conventional positive displacement system make it difficult.

Superior attributes

RVCR wind motors can be installed at ground level as it is easy to communicate the air pressure differential without losses. evaluated in terms of its implication on increment in efficiency of Power take-off, indicates towards the gain in Value. The simplified geometry of the technology component systems when compared to conventional turbines complements further gains in value

RVCR enables multi-fold increase in energy capture efficiency compared to modern wind turbines. The RVCR principal simplifies the mechanics of Prime-Mover to reduce the Capital Cost drastically and the engineering involved reduces operations cost.

The Topic is covered on the RVCR wind project page.

(RVCR Mechanism Schematic Representation)


RVCR compressor is a lower derivative of I.C.E design.(without fuel accessories and coustomized with low inertia valve placements.)

Conventional compressors overview

Conventionally reciprocating piston type along with rotary Screw, Lobe/Gear type positive displacement compressors are used for industrial need. These cover applications like generic high-pressure air, low pressure service air, Refer, Aircon, Industrial Nitrogen, Acetylene, LPG, CNG, etc. Each of these compressors have their advantages and limitations.

Reciprocating compressors generally have higher mechanism complexity. The force dynamics complicacy increases with speed due to inertia and its reversal. The limitations of reciprocating compressors is that it utilizes only one full piston area (upper side) for compression. The under-piston side is not utilized in single acting pistons. In double acting piston a fraction of the full area is used for compression action and the remaining area is open to crankcase. The piston floats on gudgeon and has to make provisions for connecting rod. This adds a degree of freedom which leads to second order vibrations and chattering.

In case of Screw compressors for applications which demand high volume flow rates, compressor needs to run at very high speeds. Screw compressors needs clean environment to work because of critical clearances maintained in between sealing surfaces. The surface sealing and its air ends are not field serviceable. Lobe/Gear compressors requires timing gears to operate freely. Thin fluids have higher slip surface sealing.

RVCR overcomes all these limitations with its unique simplified rotary mechanism and the variable delivery control feature makes the product highly viable.

Advantages of RVCR Compressors

RVCR compressors are positive displacement with adjustable compression ratio, offering high- and low- discharge and varying flow rates with single unit. Absence of Crank mechanism assures eliminations of vibrations, which aids to work with high speed.

The rotary compressors normally carry packages of fluid trapped between gears or lobes. (in screw compressor the package volume is proportional to the volume covered in 1 pitch of the screw. This volume is comparatively small compared to that displaced by a reciprocating piston.

RVCR deploys tangential Piston rotating peripherally. It increases volume handled in every stroke by a large amount and especially with increased bore. Other major advantages of RVCR compressors includes, Low RPM compared to other compressors, with fever moving parts, low maintenance cost, Multistage capability, and heavy-duty work. RVCR compressors are the best option over conventional compressors.

Hydraulics - Pumps & Motors

Its about fine control in variation of volume throughput on demand by manipulating stroke displacement.

Pumping system & Variable delivery

Pumps are an essential part of processes dealing with fluids in industrial processes, domestic use machines or other societal use like wastewater handling etc. They are placed in the fluid flow path where the fluid enters and exits from different points on the Pump. A pump acts on the fluid mainly in two different ways resulting in two different types of pumps listed below.

The 1st type: - fluid is trapped within the spaces between the moving and stationary elements of the Pump and are transported from the Inlet/entry Point to the exit point. These types of Pumps are known as 'Positive displacement' type.
The 2nd type is where the fluid is churned by a fast spinning impeller which agitates the fluid and is hence thrown outwards and channeled to the outlet. These Pumps are known as rotary/dynamic pumps. The volume transferred by 1st type of pump is easily metered as it is in multiples of the volume entrapped. It is not easy to calculate the amount of fluid churned out of the 2nd type of pump.

In Industrial and other processes, the fluid demand changes dynamically, and various methods are used to deal with such varying demand like (Starting of multiple Pumps for increased flow or say by parting the flow into multiple channels and allowing some channels to flow fluid back to the inlet side.

Pumps based on RVCR allows a wide range variation in the volume entrapped within a positive displacement pump and hence can adjust the output of the pump according to the process demand. (Idling with minimal flow when fluid demand is minimal and delivering maximum fluid during full load demand). This real time adjusting of fluid flow and hence the power consumed reduces power consumption from the current levels which uses pumps with a constant delivery volume. Moreover, the processes too are well conducted with a easily controlled fluid flow. There are several other benefits of RVCR like large volumes of fluid handled @ low speed hence lower frictional losses etc.

Pumps that can adapt their discharge on demand are known as variable delivery Pump. They are used specialized applications like Hydraulic systems. The two types are ‘Axial Piston Pump’ or swash Plate Pumps & Hele Shaw Pumps. The rarity of these pumps is due to the extreme complexity of parts and its intricate assembly. RVCR achieves variation in flow rate with a simplified mechanism compared to conventional variable delivery pumps. It can be scaled up in large sizes with ease to handle large volumes of fluids in industry processes.

Metering & dozing devices

The fine control in variation of volume throughput by manipulating stroke displacement on demand

Metering and dozing devices and basically pumps where the quantity of flow throughput is controlled. These are used over in almost every Industry dealing with fluids, ranging from biomedical, chemical, food and beverages, Breweries etc.

The volume transferred by positive displacement pump is easily metered as it is in multiples of the volume entrapped. (Volume multiplied by rotations or strokes). In Industrial and other processes, the fluid demand changes dynamically. The methods used to deal with such varying demand like; starting of multiple Pumps for increased flow or say by parting the flow into multiple channels and allowing some channels to flow fluid back to the inlet side.

The ease of variable delivery control with RVCR is discussed in the above section. RVCR allows easy variation by external control gadgetry without need for any RPM control. The precision control of volume metered analogously over a wide range makes RVCR a superior methodology.

Electric drive-systems

Using Solenoids for its pulling and pushing action on core for variable torque and speed drive

For nearly 200 years now electrical motors are based on rotary mechanism. RVCR is a new addition that simplifies conversion of electromagnetic energy into mechanical work whilst enhancing efficiency and miniaturization. Improving efficacy of torque conversion and easy intricate control of time and intensity of force for outputting wide range of torque output is key to RVCR Motors.

The RVCR knowhow development for RVCR technology motors is in process and we will upload information on the go, as we go.

Specialized utilities

RVCR Sewage Sludge Extraction system for city based sludge dewatering and similar dredging systems applications.

Sewage Sludge Extraction (SSE)

It is a smaller version of a Slurry dewatering System.

RVCR SSE is a novel rotary continuous feed mechanical sludge compression devise that simultaneously sucks, and compress sludge mix, on opposite sides of its internal rotating elements in a toroidal chamber, to segregate water and sludge into continuous out flow stream through separate channels.

Unlike conventional compression technologies this is a ‘Continuous feed Type’ machine, compact, completely enclosed system (keeping sludge sealed from the operator’s environment to maintain odour free operations)

the data is being structured for publishihg. We can surely provide details over e-mails on request.

the data is being structured for publishihg. We can surely provide details over e-mails on request.

the data is being structured for publishihg. We can surely provide details over e-mails on request.


The entire range of applications of RVCR is an exhaustive list and covers almost every fluid handling machine based on conventional kinematic mechanisms.