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GM High Feature engine
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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 High Feature moniker on the Holden produced engine is reserved for the twin cam phasing High output version. 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.
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Encyclopedia
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 High Feature moniker on the Holden produced engine is reserved for the twin cam phasing High output version. 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 and fillet rolled crankshaft, forged 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, United States.
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 (Holden 3.2, LP1 and LP9 Turbo) 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.
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 at 6200 rpm and 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:
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 at 6600 rpm and at 3200 rpm.
Applications:
LY7
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 at 6200 rpm and 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. The lower powered versions only have variable cam phasing on the inlet cam. Selected models also include variable intake. The engine weighs 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 and . The Holden Alloytec version has been modified to meet Euro III emissions standards and has an output of 262 hp (195 kW) and 251 ft-lbf (340 N-m). A dual fuel version able to run on petrol and autogas (LPG) has also been produced by Holden in Australia.
Applications:
LLT
The 3.6 liter (3564 cc) LLT is a direct injected version of the LY7. It was first unveiled in May 2006, and was claimed to have 15 percent greater power, 8 percent greater torque, and 3 percent better fuel economy than its port-injected counterpart. It has a compression ratio of 11.4:1, and has been certified by the SAE to produce at 6300 rpm and of torque at 5200 rpm on regular unleaded (87 octane) gasoline. This engine debuted on the 2008 Cadillac STS and CTS. GM will use a LLT in all 2009 Lambda-derived crossover SUVs to allow class-leading fuel economy in light of the new Corporate Average Fuel Economy (CAFE) standards. In the Lambdas, LLT engine produces and of torque.
Applications:
Future Applications:
LCS
The 3.6 L (3564 cc) LCS is derived from the direct-injected LLT for use in hybrids, using the two-mode system . Differences from the LLT include a slightly lower compression ratio, 11.3:1, and lower power and torque peaks. It will debut in the 2009 Saturn Vue Hybrid, where it will make at 6100 rpm and of torque at 4800 rpm.
Applications:
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 at 6500 rpm, and at 3300 rpm.
Applications:
LP9 Turbo
The LP9 is a 2.8 L turbocharged version is used for the Saab 9-3 and other GM vehicles. It produces EEC at 5500 rpm and 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 are also other variants available, with EEC and 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:
LF1
The LF1 is a 3.0 L version equipped with Direct Injection. In standard tune it produces and of torque
Applications:
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 at 6500 rpm and at 2300 rpm.
Applications:
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 and of torque. Development of the engine was reportedly being conducted in Australia by Holden.
In August, 2008, GM announced that development of the V12 had been canceled. The CAFE standards are most likely to blame.
See also
External links
- - Cadillac Discussion Forum, How-To, and Technical Information
- - Ward's Auto World.
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