Home engines gears indexing pumps linkages couplings pneumatics electronics electricity arduino reciprocations straight line cams thermodynamics power generation miscellaneous feedback faq about. Most two strokes engines are slowly being banned in the usa. Patpoc like opoc and patportless engines the technical. Two stroke opposed piston gasoline diesel aims for super. Piston design impact on the scavenging and combustion in an. For the opposedpiston and opposedcylinder opoc diesel engine with higher power density, recently it has drawn even more attentions than ever in several developed countries, such usa and germany, et al, which is regarded as a technical innovation to further reduce emission, and decrease fuel consumption, attributed to outstanding thermal efficiency and engine. The opoc advantage the opoc engine could represent the next generation in diesel technology, and its advancement may prove as potent to diesel performance as turbocharging. This also improves the power density by another factor of 2. The opoc engine technology developed and owned by ecomotors can deliver the same power level as conventional engines at half the size, a lower cost, and lower emissions. The opoc engine how it works bright hub engineering.
The opoc engine runs with almost two times the engine speed 3800 rpm along with a large cylinder stroke 167. The engine was made using catia v5, it took me more than 200300 hours to make. According to ecomotors, based in suburban detroit, the new opoc. With the potential for 2050% better fuel economy compared to a stateoftheart, conventional turbodiesel engine, ecomotors opoc engine. The opposed cylinder design has two cylinders, one on each side of the crankshaft, each with two pistons, for mechanical balance. Ecomotors claims to have solved many of these problems with their prototype model em100, opoc engine which produces 325 horsepower and 664 poundsfeet of torque, yet weighs only 296 pounds. Are there any examples of cars that use an opposed piston. As compared to other conventional engines, the opoc has drastically small size. The opoc engine is a twostroke reciprocating internal combustion engine in which each cylinder has a piston at both ends, and no cylinder head or mechanical valvetrain. The opoc engine is perfectly balanced enabling stackable power modules.
How opposed piston opposed cylinder opoc engines work. Nov 29, 2014 patpoc like opoc and patportless engines posted in the technical forum. In a recent article, we highlighted the controversial scuderi group and their scuderi engine that never seems to materialize into a commercially viable. The engine, as designed by ecomotors international, consists of two cylinders, each with two opposing pistons. According to the national venture capital association, it is estimated that 40% of venture backed companies fail, 40% return moderate amounts. In this video we look at the opoc engine design and discuss the pros and cons of the design. Department of energys does argonne national laboratory is working with achates power, inc. Navistar announces opoc engine technology agreement. A comprehensive investigation on the impact of piston design on scavenging and combustion in an opposed piston, opposedcylinder opoc twostroke engine is carried out and presented in this paper. To learn more about achates power and our ultraclean, ultraefficient and cost effective engines please see our videos below, and visit our youtube channel for more great content. Opposedpiston crankshaft system dynamics simulation and. This week it was granted the us8,910,597 patent for the patpoc engine.
Opposed piston opposed cylinder opoc 510 kw heavy fuel. An estimated 90% scavenging efficiency has been achieved with unique gas exchange characteristics of the opoc engine and the use of an electric assisted turbocharger. And its that piston, when combined with gasoline, air and a spark plug. Ecomotors was an american company developing and commercializing an opposedpiston opposedcylinder opoc engine for use in cars, light trucks, commercial vehicles, aerospace, marine, agriculture, auxiliary power units, generators, etc. With equipment including a 28kw 899cc overhead valve engine, black plastic bumpers and radiocassette player, the panda hawaii also offers free insurance to firsttime teenage drivers. Opposed piston opposed cylinder opoc 450 hp engine. Trade secrets opposed piston opposed cylinder motor. Radical new engine makes a run at reality video roadshow. Opposed piston opposed cylinder opoc engine for military. Ecomotors teams with navistar to produce turbo diesel opoc engine.
Compared with opposedpiston op engines, the opoc architecture comprises only one crankshaft instead of two, and all the forces generated. If you have any engine designs that you think would make a good video just leave a link or a. Opoc engine has a better selfbalancing character, less kinematic inertial force and cylinder lateral pressure, and is helpful in reducing frictional power consumption, and improving the noise vibrations smoothness. The achates power opposedpiston engine with two pistons per cylinder, working in opposite reciprocating action, the achates power opposedpiston engine does not need cylinder heads, which. All engine forces counteract each other creating inherently low noise and vibration. And, thats partly thanks to innovative designs that keep cropping up like the opoc opposed piston opposed cylinder engine from. Scavenge flow analysis of opposedpiston twostroke engine based. If this engine is able to deliver 100 miles per gallon in a passenger car, as its developers hope it will, it will be a great success. The opoc engine has a high power density of nearly one horsepower per pound. Opposed piston opposed cylinder engine video at engineering tv. Aftermarket cylinder heads why you shouldnt just bolt them on part 2 trrc vortecpro duration. Structural characteristics of opoc engine opoc engine outputs power by a single crank shaft.
An extremely lightweight opposed piston opposed cylinder opoc diesel engine is under development by fev engine technology under a defense advanced research projects agency. They have reached an agreement with navistar to build a 2. The unique design of the opoc engine produces a piston speed that is half the speed of a typical crankshaft engine running at the same speed. The engine uses a twocycle supercharged uniflow scavenging system with asymmetric port timing and will run at speeds between 8,000 and 12,000 rpm. Only time will tell if this new opoc engine will fulfill the potential it seems to offer. Retail investors seem to like the idea of a new engine. If you have any engine designs that you think would make a good video. The patpoc can be seen as a short simplified opoc opoc stands for opposed cylinder opposed piston and is the engine. Ecomotors opposedpiston engine to be built in china. A super and turbocharged boxer truck dieselgas engine with no spark plugs duration. After seeing so many positive reports on the ecomotors opoc engine, the cleeves cycle from pinnacle engines, the coaxe opposed piston diesel and many others, its hard to get too excited over one more, at this point a running engine. Sir joseph swan centre for energy research 167,030 views. Patpoc like opoc and patportless engines posted in the technical forum.
Opposed piston opposed cylinder opoc engine for military ground vehicles 2005011548 an extremely lightweight opposed piston opposed cylinder opoc diesel engine is under development by fev engine technology under a defense advanced research projects agency darpa program. Turbocharged, 125 horsepower uniflow diesel engine designed for lsa, elsa and experimental aircraft. They have reached an agreement with navistar to build a 2 module turbo diesel version for class 8 trucks, designed to produce about 480 hp, it could deliver as much as 45% better fuel efficiency than the. The funding is to be used to further develop a new engine design called the opposed piston opposed cylinder, or opoc for short. I dont think i ever read anything about the size of the opoc engine.
Ecomotors receives new investment from current customer. Dec 04, 2016 the opoc engine is an opposedpiston opposedcylinder, 2stroke engine. The opposed piston twostroke op2s engine architecture is widely recognized for its improved fuel efficiency relative to a fourstroke engine. Piston design impact on the scavenging and combustion in. Millions of indians have no choice but to download the countrys tracking. For a given power level, the opoc engine is 30% lighter, onequarter the size, and achieves 50% better fuel economy compared with a stateoftheart, conventional turbodiesel engine. Apr 11, 20 groundbreaking engine technology appears fairly frequently, but few designs ever make it beyond the test bench and into production vehicles. Lighter weight with higher torque at lower rpms mechanically simpler design with fewer moving. Jul 10, 2012 the company will also produce a gasoline version of its opoc engine technology which stands for opposedpistonopposedcylinder. A significant characteristic ecomotors claims for its opoc engine is that they can, by means of special clutches, deactivate some pairs of opposed cylinders at partial loads because each pair of opposed cylinders i. Opoc engine add a comment or brief description of this mechanism in your language. Gates, khosla invest in ecomotors efficient engine cnet. An engine cylinder is just what it sounds like a cylindrical hole in the engine into which you can place a moveable tube, called a piston. It consists of two cylinders with a piston at both ends.
Each piston travels about half the distance of a cylinder in a conventional engine. Another opoc design from pinnacle engines tries to solve for that by being a fourstroke engine. Mar 02, 2017 for the opposedpiston and opposedcylinder opoc diesel engine with higher power density, recently it has drawn even more attentions than ever in several developed countries, such usa and germany, et al, which is regarded as a technical innovation to further reduce emission, and decrease fuel consumption, attributed to outstanding thermal efficiency and engine package downsizing. All of these opoc designs are different from the flat four and flat six engines you find in a. Nov 02, 2016 there are no commercially available cars as of 2016 using opposed piston engines. Car industry technology ecomotors opoc engine goauto.
The opoc engine is an internal combustion engine, so it isnt emissionsfree. The opoc looks complicated, and expensive to build, for a two stroke engine. Freepiston engine range extender technology duration. Navistar ecomotors diesel engine diesel power magazine. The new plant will have a capacity to produce an estimated 100,000 engines per year. With opoc all but destined to the death sentence of longterm study, some geniuses in the pro opoc group thought up the attentiongrabbing proposal, according to the gnso report, that.
This engine was promoted to significantly improve fuel efficiency, and. Bill gates ups his bet on auto engine maker ecomotors. The opoc engine is a new architecture of ic engines and is growingly paid attention to due to its remarkable advantages in comparison with conventional 4 stroke engines. One of the most exciting new types of internal combustion engines is the opposedpiston opposedcylinder engine, and if you cant remember all those tonguetwisting syllables you can just call it an opoc engine. Ecomotorss opposedpiston opoc engine modules can be connected by an electronically controlled clutch. Ecomotors opoc two stroke engines opposed piston opposed.
The two pistons in each cylinder run in opposing directions, and hence there is no cylinder head. The grabcad library offers millions of free cad designs, cad files, and 3d models. The unique design of the opoc engine produces a piston speed that is half the speed of a typical crankshaft engine. Giphy is how you search, share, discover, and create gifs. The powertoweight ratio for this engine is around 1. Ecomotors opoc engine has a number of distinct advantages over traditional internal combustion engines. The opoc engine runs with almost two times the engine.
This type of engine uses the structure of longshort rod ingeniously to put the explosion pressure of internalexternal pistons and inertia force on same crank shafts. The patpoc can be seen as a short simplified opoc opoc stands for opposed cylinder opposed piston and is the engine of ecomotors bill gates. Jul 20, 2010 the reason which prompted one of the wealthiest people on the planet into providing funding for the company is the so called opoc engine or opposed pistonopposed cylinder engine. The design relies on precise computerized control of all the components. Ems opoc design eliminates the cylinder head and valve train components of conventional engines, resulting in fewer parts and a smaller, lighter and. In a recent article, we highlighted the controversial scuderi group and their scuderi engine that never seems to materialize into a commercially viable product. Please let me know how much you like this 1 is very bad 10 is excellent opoc engine. Compared to the op engine is has only one crankshaft to the output power. All of these opoc designs are different from the flat four and flat six engines. Apr 19, 2011 all engine forces counteract each other creating inherently low noise and vibration. Ecomotors opposed piston opposed cylinder engine youtube. And its that piston, when combined with gasoline, air and a spark plug that provides the motive power that makes your car go zooming down the road. Join the grabcad community today to gain access and download.
Techselect is a costeffective subscription option to select and download. Get the official youtube app for android phones and tablets. The opoc engine has very high power density of nearly one horsepower per pound resulting in an unprecedented lightweight and compact engine. The basic opoc engine consists of two cylinders on either side of a. Its engines use 60% fewer components and are lighter than. As compared to other conventional engines, the opoc. Your browser does not currently recognize any of the video formats available. Opposed piston opposed cylinder opoc engine for military ground vehicles. Achieving ultralow oil consumption in opposed piston two. Have you ever heard anything about ecomotors opoc engines.
The opoc engine is an opposedpiston opposedcylinder, 2stroke engine. China to build ecomotors efficient opposedpiston engines. Ecomotors teams with navistar to produce turbo diesel opoc. A single crankshaft sits in between pairs of cylinders. Unlike some innovative engine designs perpetually hyped as the engine of the future, ecomotors opoc engine seems to be making real headway. Opposed piston diesel engine 3d cad model library grabcad.