GM High Feature engine

The GM High Feature engine (also known as the HFV6, and including the 3600 LY7 and derivative LP1) is a family of modern

GM's Australian auto division Holden produced a HFV6 engine under the name "Alloytec."

History

The HFV6 was designed, tested, and produced in a joint program by

This engine is also known as a A28NET, Z28NET, Z28NEL or B284.

The LP9 is a 2.8L

Applications:

LAU

The LAU is GM's new code for the LP9 Turbo engine, its usage starting with the 2010 Cadillac SRX.^[1] In 2011, production of the Cadillac SRX with the LAU engine ceased, but the engine remained in use in the Saab 9-4X until 2012, when production of that model came to an end.^[2][3]

Applications:

3.0

LF1

The LF1 is a 3.0-litre (2,994 cc) version with a bore and stroke of 89 mm × 80.3 mm (3.50 in × 3.16 in) produced between 2010 and 2014, equipped with

Applications:

LFW

The LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. Output is identical to the LF1.

Applications:

3.2

Holden has built its own 3.2 L (3,195 cc) version of the High Feature engine in Australia produced between 2005 and 2010 with a bore and stroke of 89 mm × 85.6 mm (3.50 in × 3.37 in). Branded with the Alloytec name like the 3.6L version, this version produces 227 hp (169 kW; 230 PS) at 6600 rpm and 297 N⋅m (219 lb⋅ft) at 3200 rpm. It has a 10.3:1 compression ratio. Its

Applications:

• 2006-2010
  Daewoo Winstorm / Chevrolet Captiva / Holden Captiva
• 2006-2010 Opel Antara / Daewoo Winstorm MaXX / Holden Captiva MaXX
• 2008-2012 Suzuki Grand Vitara

3.6

LY7

The 3.6 L; 217.5 cu in (3,564 cc) LY7 engine was developed primarily by Holden and introduced in the 2004 Holden VZ Commodore and 2004 Cadillac CTS sedan. It has a 10.2:1 compression ratio, Sequential multi-port fuel injection, and a bore and stroke of 94 mm × 85.6 mm (3.70 in × 3.37 in). Lower-powered versions only have variable cam phasing on the inlet cam (LE0). Selected models also include variable exhaust. The engine weighs 370 lb (170 kg) as installed.

This engine is produced in several locations: St. Catharines (Ontario), Flint Engine South (Michigan), Melbourne (Australia), Ramos Arizpe (Mexico), and Sagara (Japan) by Suzuki.

Suzuki's engine designation is N36A.

The dual-fuel 235 hp (175 kW; 238 PS) LW2 version was able to run on petrol and autogas. The LW2 engine was based on the low-output LE0 V6. It featured a factory-fitted dual-fuel system developed by IMPCO, different valves, and hardened titanium valve seats. This motor was available exclusively in Holden vehicles from 2005–2012.

Applications:^[7]

LLT

The 3.6 L (3,564 cc) LLT is a direct injected version based on the earlier LY7 engine. It was first unveiled in May 2006, and the DI version was claimed to have 15% greater power, 8% greater torque, and 3% better

The 3.6 L (3,564 cc) LCS was derived from the direct-injected LLT for use in hybrids, using the two-mode system.^[13] Differences from the LLT included a slightly lower compression ratio, 11.3:1, and lower power and torque peaks. It was to debut in the 2009 Saturn Vue Hybrid, where it would have made 262 hp (195 kW; 266 PS) at 6100 rpm and 250 lb⋅ft (339 N⋅m) of torque at 4800 rpm.^[14] Fuel economy ratings would have been 6–8 km/L (17–23 mpg_‑imp; 14–19 mpg_‑US) in city, and 9–11 km/L (25–31 mpg_‑imp; 21–26 mpg_‑US) on highway. However, GM cancelled its plans for the Saturn Vue Hybrid.

LF3

The 3.6L twin-turbocharged version for the 2014 Cadillac CTS and XTS was announced at the 2013 NYAS.^[15]

The engine is rated at 420 hp (313 kW; 426 PS) of power at 5750 rpm and 430 lb⋅ft (583 N⋅m) of torque at 3500–4500 rpm (with 90% of torque being available at 2500–5500 rpm) and helps the CTS achieve 0–60 mph (0–97 km/h) time of 4.6 seconds with an 8-speed automatic transmission.

In essence, the twin-turbo 3.6L V6 is the forced-induction variant of the popular LFX V6 found in the Cadillac ATS, XTS, and SRX, among many other GM models, with several important upgrades, including:

• All-new cylinder block casting
• All-new cylinder head castings
• Strengthened connecting rods
• Forged steel
  crankshaft
• Continuously variable valve timing
• Large 38.3 mm (1.51 in) intake valves and 30.6 mm (1.20 in) sodium-filled exhaust valves
• Machined, domed aluminum pistons with top steel ring carrier for greater strength
• 10.2:1 compression ratio
• Patented, integrated charge air cooler system with low-volume air ducts
• Twin turbochargers produce more than 12 psi (83 kPa)
• Vacuum-actuated wastegates with electronic control valves
• All-new direct injection fuel system
• Tuned air inlet and outlet resonators, aluminum cam covers, and other features that contribute to exceptional quietness and smoothness

Applications:

LF4

The LF4 is a higher-performance variant of the LF3 for use in the

• Turbochargers with low-inertia titanium-aluminide turbines and vacuum-actuated wastegates for more responsive torque production
• Compressors matched for peak efficiency at peak power levels, for optimal track performance
• Patent-pending low-volume charge-cooling system that optimizes packaging efficiency and maximizes boost pressure
• Lightweight titanium connecting rods that reduce inertia of the rotating assembly, complementing the quick-spooling turbochargers^[16]
• Peak boost increased to 18 psi (1.2 bar), from 12 psi (0.83 bar)
• Higher-flow fuel injectors
• Oil pan baffling for better oil flow at high cornering speeds^[17]

Applications:

LFR

The LFR is a bi-fuel variant of the LFX, although multi-point fuel injection is used for both the gasoline and CNG instead of direct-injection.

Applications:

LFY

The LFY is similar to the LFX, but adds stop-start technology and has improved airflow.^[18]

Applications:

Fourth generation

Starting with the 2016 Cadillac models, a new generation of High Feature V6s were developed.^[19] These new engines have redesigned block architectures with bore centers increased from 103 mm (4.055 in) on prior HFV6 engines to 106 mm (4.173 in) and a redesigned cooling system to target the hottest areas while also facilitating faster warm-up. They also incorporate engine start-stop technology, cylinder-deactivation, 2-stage oil pumps, and updated variable valve timing featuring intermediate park technology for late-intake valve closure. Both engines debuted in the 2016 Cadillac CT6.^[20]

3.0 L

LGW

Bore and stroke of 86 mm × 85.8 mm (3.39 in × 3.38 in) are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required.

Applications:

LGY

Bore and stroke of 86 mm × 85.8 mm (3.39 in × 3.38 in) are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required.

Applications:

3.6 L

LGX

Along with the increased bore spacing, the new 3.6 L DI V6 has larger bores than before, growing from 94 mm (3.701 in) to 95 mm (3.740 in) with the same 85.8 mm (3.378 in) stroke as the 3.0L LGW, for a displacement of 3.6 L (3,649 cc). Intake and exhaust valves are also increased in size along with other changes to the cylinder head.^[21] The only part shared with the prior generation is the hydraulic lash adjusters in the valvetrain.^[22] The LGX was benchmarked against the 3.7L VQ37VHR of the 2015 Infiniti Q40.^[22] Compression ratio is 11.5:1 and maximum engine speed is 7200 RPM.

Compared to GM's LFX/LFY 3.6 L engine, the LGX features active fuel management, NVH enhancements and slightly more torque.^[23]

The LGX was on Ward's 10 Best Engines for 2016.^[24]

Applications:

LGZ

The LGZ is a variant of the LGX designed for use in the Chevrolet Colorado and GMC Canyon.^[25][26]

Applications:

7.2L V12

On March 21, 2007,

In August 2008, GM announced that development of the V12 had been cancelled.[28]

Timing chain issues

Earlier production 2.8L, 3.0L, 3.2L, and 3.6L engines with the three chain design suffered from premature timing chain failures because of a faulty PCV system and extended oil change intervals. Most of the problems occurred on pre-LFX engines.^[29]

Holden High Feature engine

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Kumamoto, Japan. Most of the designs of this motor happened in Flint. They were first produced for the Cadillac range.^{[citation needed]} The engine block and cylinder heads are cast at Defiance Foundry in Defiance, Ohio

.

References

1. ^ "GM Media Online: GM Canada English". Archives.media.gm.com. Retrieved 2010-11-06.
2. ^ "Cadillac SRX Turbo Model Axed". GM Inside News. Retrieved 2011-01-02.
3. ^ ^{a b} "New Saab 9-4X: Powertrain". Saab Media Online. Retrieved 2011-01-02.^{[permanent dead link]}
4. ^ Abuelsamid, Sam (2009-01-04). "Detroit Preview: 2010 Cadillac SRX reborn". autoblog.com. Retrieved 2009-01-04.
5. ^ "Press Kits". Media.gm.com. Retrieved 2022-03-29.
6. ^ "Holden's new Alloytec engine may chew as much fuel as the engine it replaces". goauto.com.au. Retrieved 2009-06-23.
7. ^ "GM News - United States - News". Media.gm.com. 2010-11-01. Retrieved 2010-11-06.
8. ^ Hellwig, Ed (2007-01-08). "Detroit Auto Show: 2008 Cadillac CTS". edmunds.com. Archived from the original on 2008-03-18. Retrieved 2009-01-04.
9. ^ Brennan, Reilly (2007-05-08). "Cadillac Ups STS Horsepower Rating To 302". nextautos.com. Retrieved 2009-01-04.
10. ^ "Engine - Power Curve". Eogld.ecomm.gm.com. Archived from the original on 2009-02-23. Retrieved 2010-11-06.
11. ^ "Engine - Power Curve". Eogld.ecomm.gm.com. Archived from the original on 2009-02-21. Retrieved 2010-11-06.
12. ^ "Engine - Power Curve". Eogld.ecomm.gm.com. Archived from the original on 2009-02-23. Retrieved 2010-11-06.
13. ^ "Model Information - Online Ordering Guide". Eogld.ecomm.gm.com. Archived from the original on 2009-02-21. Retrieved 2010-11-06.
14. ^ http://media.gm.com/us/powertrain/en/product_services/2009a/HPT%20Library/HFV6/2009%2036L%20Hybrid_SAE.pdf ^{[dead link]}
15. ^ "Cadillac Twin-Turbo Debuts in All-New 2014 CTS Sedan". Media.gm.com. 2013-03-18. Retrieved 2022-03-29.
16. ^ "Cadillac ATS-V Expands Lineup, Intensifies Passion". GM Media USA. GM. Retrieved 19 November 2014.
17. ^ "2016 Cadillac ATS-V Coupe and Sedan: 455 M3-Baiting Horsepower!". Car & Driver. Car & Driver. 18 November 2014. Retrieved 19 November 2014.
18. ^ "GM 3.6 Liter V6 LFY Engine". 19 April 2017.
19. ^ "All-New, Advanced 3.6L V-6 to Drive Cadillac CT6". 20 March 2015. Retrieved 5 April 2015.
20. ^ "Cadillac Next-Gen V-6 Engines Led by 3.0L Twin Turbo". GM Media USA. GM. 20 March 2015. Retrieved 20 March 2015.
21. ^ "All-New, Advanced 3.6L V-6 to Drive Cadillac CT6". Cadillac Media USA. Cadillac Media USA. 20 March 2015. Retrieved 20 March 2015.
22. ^ ^{a b} "GM Powertrain Shows Love for 6-Pack". 9 November 2015.
23. ^ Albrecht, Tom. "Buyers Don't Seem To Care That New Buick Enclave Uses Last-Gen Engine". Retrieved 27 March 2024.
24. ^ "Electrics Charge up 10 Best Engines List | Engines content from WardsAuto". Archived from the original on 2015-12-15.
25. ^ "2017 GM VIN Card" (PDF).^{[permanent dead link]}
26. ^ "Chevrolet Colorado Resets the Bar for Midsize Segment". Media.chevrolet.com. 2016-08-26. Retrieved 2022-03-29.
27. ^ "AutoWeek Breaks Major Cadillac News in March 26 Issue" (Press release). prnewswire.com. 2007-03-21. Retrieved 2009-01-04.
28. ^ "Cadillac cancels plans for V12 XLKS flagship sedan". autospies.com. 2008-08-21. Retrieved 2009-01-04.
29. ^ "MOTOR".

External links

Wikimedia Commons has media related to General Motors High Feature engine.

• Technical article from AutoSpeed
• GM Unveils New Direct Injection V-6 - Ward's Auto World
• WebWombat article
• http://www.gminsidenews.com/index.php?page=Engine_Guide
• http://www.chevrolet.com/impala-4-door-sedan.html
• https://web.archive.org/web/20140109174626/http://www.chevrolet.com/2013-traverse-crossover-suv.html