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:''See also Ford Essex V6 engine (Canadian)'' | (3.1 L) | | stroke = | displacement = 2.5 L 2495 cc 152 cu in 3.0 L 2994 cc 183 cu in 3.1 L 3098 cc 189 cu in 3.4 L 3375 cc 206 cu in 3.4 L 3412 cc 207 cu in | weight = 170 kg 374 lbs | power = 118 - 462 Hp | torque = 132 - 300 ft/lb | block = Cast iron | head = Cast iron LM 25 Aluminium alloy ( Cosworth GAA ) | valvetrain = OHV 12 valve (2 per cylinder) Solid flat tappet lifters inlet valves exhaust valves SA 3.4 L: inlet valves exhaust valves Capri X pack: inlet valves exhaust valves 〔(【引用サイトリンク】 Project 200 hp )〕 DOHC 24 valve (4 per cylinder) - Cosworth GAA | supercharger = Naturally aspirated (stock) Turbocharged: TVR 3000M Turbo & aftermarket Supercharger : aftermarket | turbocharger = | fuelsystem = 2.5 L : Ford 1250 1bbl carburetor 3.0 L : Ford 1250 1bbl carburetor Weber 40 DFAV 2bbl carburetor Weber 38 DGAS 2bbl carburetor Weber 40 DFI 5 2bbl carburetor Electronic Fuel Injection x3 Weber 42 DCNF 2bbl carburetors 3.1 L : Weber 38 DGAS 2bbl carburetor SA 3.4 L : Weber 38 DGAS 2bbl carburetor Cosworth GAA 3.4 L : Lucas Mechanical Fuel Injection | fueltype = Gasoline ( Leaded ) | oilsystem = Wet sump (stock) Dry Sump (Cosworth GAA)〔http://www.tubetvr.com/essexpictures.html〕 | coolingsystem = Jacketed block (stock) | compression = 8.0:1 (TVR 3000S Turbo) 8.9:1 (standard pre-1971) 9.0:1 (standard after 1971) 9.1:1 (Ford Capri X-Pack 3.0) 9.5:1 (Ford Sierra 3.0 Sapphire) 10.0:1 (Cosworth 3.4 GAA)〔http://www.ford-capri.ch/technics/technical-data-I/3000e-gt-gxl-71-73-e.html〕〔http://www.ford-capri.ch/technics/technical-data-III/3000x-78-80-e.html〕 |production=1966 - 1988 UK 1982 - 2000 SA }} The Ford Essex V6 engine was a 60° V6 engine built between 1966 and 1988 by the Ford Motor Company in the United Kingdom and up until 2000 in South Africa although mostly in the Ford engine plant of Dagenham, Essex, which gave the engine its name. It is closely related to the Ford Essex V4 engine produced in displacements of 1.7 L and 2.0 L. Both engines share many parts since the Essex V6 was directly derived from the Essex V4, the 2.0 L Essex V4 and the 3.0 L Essex V6 in fact have the exact same bore and stroke and share various components.〔http://www.ford-capri.ch/technics/technical-data-I/2000gt-69-73-e.html〕 ==History== The Essex V4 and V6 were mainly designed to replace the outdated and aging inline-four and six-cylinder Ford Zephyr engine. It was produced in four capacities: 2.5 L (2495 cc, 153 ci), 3.0 L (2994 cc, 183 ci), 3.1 L (3098 cc, 189 ci), 3.4 L (3412 cc, 207 ci), with the 3.0 litre version being the most common and widely used. These engines were fitted to a wide range of vehicles, from Ford Transit vans to sedans, coupés like the Ford Capri and sports cars like TVR and Marcos. The earlier versions of engine were rated at 128 hp ( 95 kW ) and 173 lb/ft of torque, around October 1971 the engine was revised by modifying the camshaft and cylinder heads that improved the power and torque to produce 144 Hp or 138 DIN hp (103 kW) at 5000 rpm and 182 lb/ft of torque at 3000 rpm. At the same time, the oil disptick was moved from the front of the engine to the side, the Ford Capri used header style manifolds instead of the standard cast log type manifolds used in other cars equipped with this engine, the inlet manifold was improved from earier models, and the compression ratio was raised slightly from 8.9:1 to 9.0:1 due to a change of the piston design.〔http://duttonowners.ning.com/photo/red-block?test-locale=&exposeKeys=&xg_pw=&xgsi=&id=2398922%3APhoto%3A57164&groupId=&groupUrl=&xgi=&page=1#comments〕 The shape of the inlet ports were also changed, from an O-port design to a D-port design which improved the flow characteristics of the heads, with the new carburetor the air filter housing was also changed and a hot air intake was added consisting of a metal pipe running from the top of a plate welded on the exhaust manifold or header to an opening in the air intake to prevent the carburetor from icing and making the engine warm up quicker, this and a Positive crankcase ventilation ( Pcv ) system were also early forms of emissions control. The camshaft gear was also made slightly stronger by using steel with nylon teeth instead of being completely made from nylon as on previous ones, aftermarket steel, aluminium and alloy gears have been produced as replacements to prevent the gear from stripping its teeth, this commonly is due to overheating causing the nylon to weaken.,〔〔http://www.tickover.co.uk/shop/contents/en-uk/d129.html〕 this is one of the two major " weak points " of Essex V4 & V6 engines with the other being the hexagonal oil pump spindle/ shaft which can round off or even break, this is commonly caused by thick oil and cold temperatures which put a large stress on the oil pump and spindle / shaft, since the appearance of multi-grade oils such as 10w40 and 20w50 this problem has become less common.〔http://tvr.m-fix.co.uk/oilpumpv6.htm〕 The 2.5 L engine was rated at 118 or 120 hp and 132 or 144 lb/ft of torque depending on the application. The 2.5 litre version ended production in 1977 along with the Essex V4 engine.〔http://www.automobile-catalog.com/car/1974/916955/ford_consul_2500.html〕 The 3.1 L engine as used in the Ford Capri RS 3100 was essentially a 3.0 L engine bored out by 1.6 mm or 60 thousands of an inch from 93.6 mm (3.69 inches) to 95.2 mm (3.75 inches). It was capable of 148 hp and 188 lb/ft of torque. It featured blue rocker covers in order to distinguish the engine from the usual 3.0 L engine and it also featured hand polished and ported inlet and exhaust ports, Only 250 RS 3100s were produced for homologation purposes between November 1973 and January 1974, making original 3.1 litre engines very rare, although modified engines bored +0.60 are common, one of the first 50 engines which was in a RS 3100 that was free for car magazines to review and test in fact had 165 Hp instead of the 148 of the rest of road going RS 3100s, this was achieved with a higher lift camshaft.〔http://s1195.photobucket.com/user/coo260t/media/scan0032_zps7af75455.jpg.html〕〔https://www.flickr.com/photos/triggerscarstuff/6674182651/sizes/l〕〔http://www.rsownersclubaust.com.au/?page_id=19〕〔http://www.ford-capri.ch/technics/technical-data-I/3100rs-73-74-e.html〕 These figures vary somewhat depending on the source.〔http://www.ford-capri.ch/technics/technical-data-II/3000-gt-ghia-s-74-78-e.html〕〔http://www.ford-capri.ch/technics/technical-data-I/3000e-gt-70-71-e.html〕 The Essex V6 also formed the base for the 3.4 L Cosworth GAA born in May 1972 and designed by Mike Hall, also responsible for designing Cosworth's famous DFV Engine 〔 the GAA with the benefit of 100mm bores, DOHC aluminium alloy heads, Lucas mechanical fuel injection, a dry sump oiling system and a steel crankshaft generated at 9000 rpm and 300 ft/lb of torque, Mike Hall's intention was to design the cylinder heads so that 3 spark plugs per cylinder could be fitted but this idea was dropped since there wasn't any appreciatable increase in power or torque, the original objective was an engine with a minimum of 400 Hp, this objective was exceeded with the engine making 420 Hp in the first test run. This engine was used in the racing version of the Capri RS 3100, competing successfully in the European Touring Car Championship, as well as in Formula 5000 single-seaters. 100 kits were also sold by Ford Motorsport. 〔https://www.facebook.com/162525143777251/photos/pb.162525143777251.-2207520000.1446293727./1116998181663271/?type=3&theater〕 . Ford RS Dealerships also offered a number of performance modifications for the Essex V6 called the GP1 and X Pack , the GP1 package offered a Weber 40 DFI5 Carburetor a camshaft kit, larger 44.5mm inlet and 41.3mm exhaust valves, double valve springs, "specially selected" connecting rods and forged high compression pistons giving a power output of around 170 Hp, the X pack offered the same larger inlet and exhaust valves as the GP1 but also offered a new inlet manifold designed for 3 Weber 42 DCNF Carburetors, nicknamed as the "Triple Weber manifold" which boosted power up to 185 Hp and 195 lb/ft which was fitted as standard on the Series X Capris made from 1977 to 1981. 〔http://www.capripower.co.uk/forum/index.php?/topic/360-original-ford-rs-parts-catalogue-supplied-by-martin-mk2/〕 〔https://www.flickr.com/photos/134498023@N03/22672925669/in/datetaken-public/〕 Earlier versions of the 3.0 litre engine ( pre October 1971 ) were fueled by a Weber 40 DFAV Twin choke carburetor, which had some inherent faults in its design which caused it to run too rich and cause bore wash. It was subsequently replaced by a more modern Weber 38 DGAS twin choke carburetor which effectively solved the problems of the earlier carburetors, and was used for the 3 Litre V6 until the end of its production.〔 The 2.5 litre V6 used a single barrel Ford carburetor which was also used in the low compression variants of the 3.0 litre Essex V6 used in the Ford Transit. Unusually, the Essex V6 was designed so that the same block could serve in both diesel (compression ignition) and petrol applications, although the diesel version never reached production. Traces of its diesel design lie in the very heavy construction using Heron cylinder heads and the necessity for dished pistons to decrease compression for the petrol engine. The cast iron Essex V6 is a heavy engine due to its sturdy design weighing in at 170 kg or 374 pounds, 56 pounds more than the aluminum alloy Rover V8, for example,〔http://www.gomog.com/allmorgan/engineweights.html〕 the Essex V6 also has a very heavy yet sturdy four-main bearing crossplane crankshaft with large 63.52mm (2.50 in) main journals,〔http://www.burtonpower.com/main-bearing-set-std-with-std-od-housing-ford-essex-v6-vp91247-std.html〕 and a heavy flywheel in order to smooth out the power delivery, sometimes Essex V6 engines are referred to as an "Essex Lump" referring to the weight of these engines. In spite of its heaviness, the Essex V6 was used as the main workhorse and a high performance option for medium to full-sized cars like the Capri the Granada and Transit vans supplied by Ford to the Police and Ambulance services in the UK throughout the late 1960s and 1970s and up until 1989 in the case of the Transit where it was later replaced by more modern engines such as the fuel injected 2.8 and 2.9 L Ford Cologne V6 engine and was even used until year 2000 in South Africa. TVR contracted the company Broadspeed to develop a turbocharging system for their TVR 3000S Turbo. In lieu of fuel injection, the carburettor was run inside a pressurized box atop the engine, and the turbocharger itself was mounted low and forward in the engine compartment, requiring the exhaust manifolds to exit forward. The compression ratio was lowered from 9.0:1 to 8.0:1 to reduce the engine's internal stresses. Turbocharging substantially increased horsepower, from 138 hp to 230 () and torque from 182 lb/ft to 273 lb/ft. Broadspeed also designed a turbocharging system For the Mk1 Ford Capri 3.0, available since early 1970〔http://www.caprimk1register.com/history.stm〕 these Capris were known as Broadspeed Bullett Capris, the engine was heavily modified and included modified cylinder heads, a high lift camshaft, a re jetted carburetor a new inlet manifold and exhaust system using a single turbocharger. Their power was substantially increased (by 63%) from 138 hp to 218 hp. Similar to the TVR 3000S' turbocharging system, it used a "Blow through Carburetor" system in which the standard but re-jetted Weber 38 DGAS carburetor was run inside a pressurized box , performance figures further increased with the uprated post-October 1971 versions of the engine.〔 The company Janspeed, well known for their high performance exhaust systems also designed a turbocharging system for the Ford Essex 3.0 L and 1.6 - 2.0 L OHC engines, although these were much simpler than the turbocharging system offered by Broadspeed, Janspeed promised a 25% increase in horsepower boosting the engine's power output from 138 to around 172 Hp using a single Roto-Master turbocharger mounted directly on top of the left bank of the engine providing 5 psi of boost.〔http://www.capripower.co.uk/boardold/lofiversion/index.php?t4032.html〕 The 2.5 L and 3.0 L engines share the same block and bore, differing only in crank throw and pistons , 3.0 L pistons have a length of 95mm and 2.5 L pistons have a length of 100 / 101mm, since the bore is the same on both engines at 93.6mm, 2.5 pistons can be used in combination with a 3.0 crankshaft to raise the compression. .〔 Companies like Specialised Engines, Essex engines and Ric Wood have professionally built and developed large displacement 3.2 L, 3.4 L and even 4.0 L Conversions and forced induction conversions for the Essex V6 with power outputs reaching as high as 390 Hp. 〔http://www.essexengines.com/ford%20essex%203.4%20litre%20v6%20engine.htm〕 〔http://www.specialisedengines.co.uk/engine-services/3-0-essex-capri-consul-granada-zephyr-and-zodiac〕 〔http://www.ricwood.com/essexv6.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ford Essex V6 engine (UK)」の詳細全文を読む スポンサード リンク
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