GM small gasoline engine

"Small Gasoline Engine" redirects here. For the Fiat TwinAir engine also referred to as Small Gasoline Engine, see Fiat TwinAir engine.

Small Gasoline Engine
Overview
Manufacturer
Also calledMicrotec
Production2013 (2013)–present
Layout
Configuration
Displacement
  • 999 cc (1.0 L; 61.0 cu in)
  • 1,117 cc (1.1 L; 68.2 cu in)
  • 1,399 cc (1.4 L; 85.4 cu in)
  • 1,490 cc (1.5 L; 90.9 cu in)
Cylinder bore74 mm (2.91 in)
Piston stroke
  • 77.4 mm (3.05 in)
  • 77.7 mm (3.06 in)
  • 81.3 mm (3.20 in)
  • 86.6 mm (3.41 in)
Cylinder block materialAluminium
Cylinder head materialAluminium
ValvetrainDOHC 4 valves x cyl.
Valvetrain drive systemChain
Compression ratio10.0:1 - 12.5:1
RPM range
Max. engine speed6500
Combustion
TurbochargerMitsubishi Heavy Industries one-stage single-scroll (some versions)
Fuel system
Fuel type
Oil systemWet sump
Cooling systemWater cooled
Output
Power output55–130 kW (74–175 hp; 75–177 PS)
Torque output95–275 N⋅m (70–203 lb⋅ft)
Dimensions
Dry weight98 kg (216 lb) [specify]
Chronology
Predecessor
SuccessorGM E-Turbo engine (1.4 Version)

The GM Small Gasoline Engine (SGE) is a family of small-displacement three- and four-cylinder gasoline engines ranging from 1.0 L to 1.5 L, developed by Adam Opel AG, Shanghai Automotive Industry Corporation (SAIC), MG Motor (MG), Shanghai GM (SGM) and the Pan-Asia Technical Automotive Center (PATAC).[1]

The new global family is designed to improve fuel economy, performance, and emissions, reduce noise and vibrations. To achieve this, it features lightweight design and advanced technologies like gasoline direct injection, turbocharging, variable length intake manifold and alternative fuel compatibility. It uses a modular approach with interchangeable components that can be suited to specific application.

The initial engine variants include

  • 999 cc (1.0 L; 61.0 cu in) I3 DI DCVCP turbo 77.4 mm (3.05 in) stroke,
  • 1,118 cc (1.1 L; 68.2 cu in) I3 PFI 86.6 mm (3.41 in) stroke,
  • 1,399 cc (1.4 L; 85.4 cu in) I4 DI DCVCP turbo 81.3 mm (3.20 in) stroke and
  • 1,490 cc (1.5 L; 90.9 cu in) I4 PFI 86.6 mm (3.41 in) stroke. All are derived from just two blocks (three and four cylinder) sharing a common 74 mm (2.91 in) bore with 81 mm (3.19 in) bore spacing. Mitsubishi Heavy Industries provides one-stage single-scroll turbocharger.[2]

To reduce NVH (Noise, vibration, and harshness) levels the direct injection fuel rail mounts to the cylinder head and valve cover via bushings that isolate the loud ticking noise that injector pintles make. GM claims that the 1.0-liter turbo is 25 percent (3 dBA) quieter than the Ford Fiesta's 1.0-liter turbo, and the 1.4-liter is up to 50 percent (6 dBA) quieter than the VW/Audi 1.4-liter turbo. Other silencing measures include a bed-plate cylinder block that increases stiffness and a stiffened aluminum front cam cover. Three-cylinder variants get a balance shaft that is integrated with the oil pump and located inside the two-piece aluminum oil pan to prevent radiated noise. The shaft counter-rotates at engine speed. GM claims that the EcoTec triple will idle more smoothly than Ford's three-cylinder, which does not use a shaft.[2]

All turbocharged variants will provide 90 percent of their maximum torque between 1500 and 5000 rpm, with peak power arriving between 5600 and 6000 rpm. The MHI turbochargers are sized to provide quick torque response, and are mounted very close to the cylinders, thanks to cylinder heads that incorporate the exhaust manifolds in the head.[2]

To reduce mass, the engines are compact in all directions, made almost entirely of aluminum, and feature composite intake manifolds. This removes 44 pounds (20 kg) from the existing 1.4-liter turbo in the Cruze and makes it 8 pounds (4 kg) lighter than the 1.4-liter VW turbo. GM says this engine weighs 216 pounds (98 kg), ready for installation.[2]

The engines will debut in the 2014 Opel Adam[3] and will be produced in Szentgotthárd, Hungary[4][5] and GM's Flint Engine plant.[6] The new engine family will spread to other brands and markets by the end of the decade and will replace three separate engine families (S-TEC, Family 0, and Family 1).

The engine is used in:

The assembly lines for North American facilities were manufactured by Hirata Corporation at their powertrain facility in Kumamoto, Japan.

  1. ^ "Future Chevrolets to Benefit from Small Gas Engine Family". Media.gm.com. October 12, 2011. Retrieved May 29, 2012.
  2. ^ a b c d "General Motors Details New Modular I-3, I-4 Engines"
  3. ^ "Home | Media OPEL International". Media.opel.com. Retrieved September 13, 2019.
  4. ^ "Opel Expands Engine Production in Szentgotthárd, Hungary". Media.gm.com. September 21, 2010. Retrieved May 29, 2012.
  5. ^ Autonews: New Opel minicar set to debut small engine co-developed with China's SAIC[permanent dead link]
  6. ^ a b Loveday, Eric. "Official: 2016 Chevy Volt To Get 1.5-Liter, 4-Cylinder Range Extender". Inside EVs. Retrieved October 28, 2014.
  7. ^ "This is the MG GT for the Chinese car market". CarNewsChina.com. October 6, 2014. Retrieved September 13, 2019.
  8. ^ "Buick Introduces 2016 Encore Sport Touring". Media.gm.com. July 20, 2015. Retrieved September 13, 2019.
  9. ^ "GM Engine Original Equipment Manufacturer | GM Powertrain" (PDF). GM Powertrain. Retrieved January 27, 2020.