GM High Feature engine

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High Feature V6
Manufacturer General Motors
Also called: Alloytec V6
Production: 2004–
Predecessor: 54° V6

The 3600 LY7 (and derivative LP1) are members of General Motors' new High Feature (or HFV6) engine family of modern DOHC V6s. This new family of engines was introduced in 2004 with the Cadillac CTS. Holden sells the HFV6 under the name Alloytec. The block was designed to be expandable from 2.8 L to 4.0 L.

It is a 60° 24-valve design with aluminum block and heads and Sequential Electronic Fuel Injection. Most versions feature continuously-variable cam phasing on both intake and exhaust valves and electronic throttle control. Other features include piston oil-jet capability, forged crankshaft and connecting rods, a variable intake manifold, twin knock control sensors and coil-on-plug ignition. It was developed by the same international team responsible for the Ecotec, including the Opel engineers responsible for the 54° V6, with involvement with design and development engineering from Ricardo, Inc.

High Feature V6 engines are produced at Fisherman's Bend in Port Melbourne, Australia, St. Catharines in Canada, and Flint Engine South in Flint, Michigan.

Contents

[edit] History

The HFV6 was first designed, tested and produced in a joint team by Cadillac and Holden. A majority of design into the new alloy construction, transmission pairing and first use in production were all undertaken in Detroit (and manufactured in St Catherines). Holden had the job of developing smaller engines as well as their own Holden HFV6 (called the Alloytec V6) for local models.

Cadillac and Holden both tested variations of these engines in US and Australia.

North America and Australia remain the only two places that manufacture the HFV6.

[edit] Alfa Romeo

Alfa Romeo uses the High Feature engine design, though with many modifications, as the JTS V6. The Alfa unit features lean-burn technology as on many other engines from the company. It displaces 3.2 L (3195 cc) and has an output of 260 hp (DIN) (191 kW) at 6200 rpm and 237 ft·lbf (322 N·m) torque, with gasoline direct injection allowing a high compression ratio of 11.25:1. The engine is also equipped with cam-phasing on both inlet and exhaust side, thus the name "TwinPhaser".

Alfa Romeo only acquires the core designs and productions of the HFV6. It is then taken to their factory and modified for their performance, fuel economy and soundtrack.

Applications:

[edit] Holden 3.2

Holden has built its own 3.2 L version of the High Feature engine in Australia. Branded with the Alloytec name like the 3.6 L version, this version produces 227 hp (169 kW) at 6600 rpm and 219 lb·ft (297 N·m) at 3200 rpm.

Applications:

[edit] LY7

LY7 V6 engine in a Cadillac STS.
LY7 V6 engine in a Cadillac STS.
Alloytec V6 engine in a Holden VZ Commodore.
Alloytec V6 engine in a Holden VZ Commodore.
LPG Alloytec V6 engine in a Holden VE Commodore.
LPG Alloytec V6 engine in a Holden VE Commodore.

The 3.6 L (3564 cc) LY7 version was introduced in the 2004 Cadillac CTS sedan. It has a 10.2:1 compression ratio and produces 255 hp (190 kW) at 6200 rpm and 252 lb·ft (342 N·m) at 3100 rpm. The bore is 3.70 in (94.0 mm) and the stroke is 3.37 in (85.6 mm). In some applications, including the Buick LaCrosse and Holden Commodore, the LY7 has an output of 235 to 262 hp (175 to 195 kW) and 225 to 251 ft·lbf (305 to 340 N·m) depending on the vehicle induction and exhaust system designs. Selected models also include variable intake. The engine weighs 370 lb (170 kg) as installed.

This engine is produced in North America and Australia.

On the Lambda crossover SUVs (Saturn Outlook, GMC Acadia, and Buick Enclave) it produces 275 hp (205 kW) and 251 lb·ft (340 N·m). The Holden Alloytec version has been modified to meet Euro III emissions standards. A 235 hp (175 kW) version able to run on autogas (LPG) has also been produced.

Applications:

[edit] LLT

The 3.6 L (3564 cc) LLT is a direct injected version of the LY7. It was first unveiled in May 2006, and was claimed to have 15% greater power, 8% greater torque, and 3% better fuel economy than it's port-injected counterpart. It has a compression ratio of 11.4:1, and has been certified by the SAE to produce 302 hp (225 kW) at 6300 rpm and 272 lb·ft (369 N·m) of torque at 5200 rpm on regular unleaded (87 octane) gasoline. This engine will debut on the 2008 Cadillac STS and CTS [1][2]. GM will use a LLT in all 2009 Lamdba crossovers to allow class-leading fuel economy in light of the new CAFE standards. In the Lambdas, LLT engine produces 286 hp (213 kW) and 255 lb·ft (346 N·m) of torque. [3][4][5]

Applications:

Future applications

[edit] LCS

The 3.6 L (3564 cc) LCS is the hybrid version of the LLT, using the two-mode system [8]. It will debut in the 2009 Saturn Vue Green Line, where it will make 255 hp (190 kW) and 252 lb·ft (342 N·m) of torque. [9]

Applications:

[edit] LP1

A 2.8 L (2792 cc) LP1 variant was introduced in the 2005 Cadillac CTS. It has a 3.50 in (89.0 mm) bore, a 2.94 in (74.8 mm) stroke, and a 10.0:1 compression ratio. It generates 210 hp (157 kW) at 6500 rpm, and 194 lb·ft (263 N·m) at 3300 rpm.

Applications:

[edit] Suzuki

Suzuki builds the High Feature V6 at its Sagara, Japan plant for the Suzuki XL-7 SUV under license from General Motors. Displacing 3.6 L, this engine produces 252 hp (188 kW) at 6500 rpm and 243 lb·ft (329 N·m) at 2300 rpm.

Applications:

[edit] LP9 Turbo

2.8 L turbo V6 in a 2006 Saab 9-3 SportCombi
2.8 L turbo V6 in a 2006 Saab 9-3 SportCombi

The LP9 is a 2.8 L turbocharged version is used for the Saab 9-3 and other GM vehicles. It produces 255 hp (190 kW) EEC at 5500 rpm and 258 lb·ft (350 N·m) between 1800 and 5000 rpm. It has the same bore and stroke as the naturally-aspirated LP1, however the compression ratio is reduced to 9.5:1. There is also other variants available, with 230 hp (172 kW) EEC and 280 lb·ft (380 N·m) EEC. GM Powertrain Sweden (Saab Automobile Powertrain) has been responsible for the turbocharging of the engine. The engine is built in Port Melbourne, Australia.

Applications:

[edit] V12

On March 21, 2007 it was reported by AutoWeek that GM is planning to develop a 60-degree V12 based on this engine family to power the top version of Cadillac's upcoming flagship sedan. This engine would essentially consist of two 3.6 L High Feature V6s attached end-to-end on a single crankshaft, and would feature such high-end technologies as direct injection and cylinder deactivation. If so, the engine would displace 7.2 liters, and produce approximately 600 hp (447 kW) and 540 lb·ft (732 N·m) of torque. Development of the engine is reportedly being conducted in Australia by Holden. [1]

[edit] See also

[edit] References

  1. ^ http://www.edmunds.com/insideline/do/Features/articleId=119071?tid=edmunds.il.home.photopanel..2.*#5
  2. ^ http://news.windingroad.com/body-stylesmarket-segment/sedans/cadillac-ups-sts-horsepower-rating-to-302/
  3. ^ http://eogld.ecomm.gm.com/NASApp/domestic/graytabcontroller.jsp?graytabtype=1&rpoid=39719&vehicleid=6650&section=engineAxle
  4. ^ http://eogld.ecomm.gm.com/NASApp/domestic/graytabcontroller.jsp?graytabtype=1&rpoid=36105&vehicleid=6795&regionID=1&section=oi_def
  5. ^ http://eogld.ecomm.gm.com/NASApp/domestic/graytabcontroller.jsp?graytabtype=1&rpoid=40162&vehicleid=6858&section=engineAxle
  6. ^ http://www.autoshow.ca/2008/downloads/SHOWBIZ-JAN08.pdf
  7. ^ http://www.ls1.com.au/forum/showthread.php?t=96095
  8. ^ http://eogld.ecomm.gm.com/NASApp/domestic/proddesc.jsp?year=2009&regionID=1&divisionID=10&type=0&vehicleID=6861&section=engineAxle&page=5&butID=3
  9. ^ http://eogld.ecomm.gm.com/NASApp/domestic/graytabcontroller.jsp?graytabtype=1&rpoid=40181&vehicleid=6861&section=engineAxle

[edit] External links