More info on the new Turbo 1.4L
Thread Starter
Registered User
Joined: Jan 2000
Posts: 10,285
From: Albany, NY
More info on the new Turbo 1.4L
Glad to see it is also direct injection. Looks like they will probably wait for the next generation (2010?) before it goes into the Cobalt.
http://www.greencarcongress.com/2008...duce.html#more
http://www.greencarcongress.com/2008...duce.html#more
General Motors Corp. will introduce in 2009 two new engines offering fuel efficiency gains for vehicles marketed in Europe and other regions. Both engines are new variants of GM’s existing engine families used globally.
A 1.4-liter direct-injection turbocharged 4-cylinder engine will be used in vehicles worldwide starting in 2010. A 1.6-liter Compressed Natural Gas (CNG) turbocharged 4-cylinder engine will be introduced in the Opel Zafira in 2009.
The 1.4-liter Turbo engine is a new addition to an engine family that ranges from 1.0 to 1.4-liter displacement. The engine will produce an estimated output ranging from 88 kW to 104 kW (120 hp to 140 hp) and torque values of 175 Nm to 200 Nm (129 lb-ft to 148 lb-ft). It will deliver an approximate 8% improvement in fuel consumption (compared to a higher displacement naturally aspirated engine with similar output) and will be Euro 5 compliant.
Injection nozzles are positioned centrally in the combustion chamber for the direct injection (up to 200 bar) to make sure that a homogeneous mixture is produced and also ensure that the design will not become outdated, as it will also be suitable for other future developments such as HCCI.
The two camshafts can be adjusted independently of one another. At medium load, the intake valves are closed late, which is good for low fuel consumption. At low engine speeds and high loads, on the other hand, the engine works with a higher valve overlap to improve the torque curve.
Key features include a turbocharger integrated into the exhaust manifold, full variable valve timing, thermal management, flow-controlled oil pump, and a reinforced crankshaft and connecting rod.
The engine will be manufactured at the GM Powertrain assembly facility in Aspern, Austria.
The 1.6-liter CNG Turbo is a new variant in the 1.6-liter engine family that includes a naturally aspirated gasoline unit and a CNG unit. The engine will generate an estimated output of 110 kW (150 hp) and an estimated torque of 210 Nm (155 lb-ft).
Key features include a turbocharger integrated into the exhaust manifold, an intake manifold with a gasoline and CNG fuel rail, and an oil cooler and piston cooling.
A 1.4-liter direct-injection turbocharged 4-cylinder engine will be used in vehicles worldwide starting in 2010. A 1.6-liter Compressed Natural Gas (CNG) turbocharged 4-cylinder engine will be introduced in the Opel Zafira in 2009.
The 1.4-liter Turbo engine is a new addition to an engine family that ranges from 1.0 to 1.4-liter displacement. The engine will produce an estimated output ranging from 88 kW to 104 kW (120 hp to 140 hp) and torque values of 175 Nm to 200 Nm (129 lb-ft to 148 lb-ft). It will deliver an approximate 8% improvement in fuel consumption (compared to a higher displacement naturally aspirated engine with similar output) and will be Euro 5 compliant.
Injection nozzles are positioned centrally in the combustion chamber for the direct injection (up to 200 bar) to make sure that a homogeneous mixture is produced and also ensure that the design will not become outdated, as it will also be suitable for other future developments such as HCCI.
The two camshafts can be adjusted independently of one another. At medium load, the intake valves are closed late, which is good for low fuel consumption. At low engine speeds and high loads, on the other hand, the engine works with a higher valve overlap to improve the torque curve.
Key features include a turbocharger integrated into the exhaust manifold, full variable valve timing, thermal management, flow-controlled oil pump, and a reinforced crankshaft and connecting rod.
The engine will be manufactured at the GM Powertrain assembly facility in Aspern, Austria.
The 1.6-liter CNG Turbo is a new variant in the 1.6-liter engine family that includes a naturally aspirated gasoline unit and a CNG unit. The engine will generate an estimated output of 110 kW (150 hp) and an estimated torque of 210 Nm (155 lb-ft).
Key features include a turbocharger integrated into the exhaust manifold, an intake manifold with a gasoline and CNG fuel rail, and an oil cooler and piston cooling.
Registered User
Joined: Sep 1998
Posts: 4,320
From: Memphis
8%? Can we assume that's 8% over the current base cobalt motor? So instead of 35 mpg highway with a manual in the current model it'd get 37.8.
That's good... class leading... but I'm unsure about using a turbo to do it... I mean it seems you pretty much NEVER hear of a turbocharged vehicle making it past 150k miles without requiring some extra work (Turbo rebuild if not more) that a non turbocharged vehicle wouldn't need.
Also it seems they typically require premium fuel, though I'm sure this might be tuned to not require it... and the torque curve is probably pretty flat.
That's good... class leading... but I'm unsure about using a turbo to do it... I mean it seems you pretty much NEVER hear of a turbocharged vehicle making it past 150k miles without requiring some extra work (Turbo rebuild if not more) that a non turbocharged vehicle wouldn't need.
Also it seems they typically require premium fuel, though I'm sure this might be tuned to not require it... and the torque curve is probably pretty flat.
Thread Starter
Registered User
Joined: Jan 2000
Posts: 10,285
From: Albany, NY
8%? Can we assume that's 8% over the current base cobalt motor? So instead of 35 mpg highway with a manual in the current model it'd get 37.8.
That's good... class leading... but I'm unsure about using a turbo to do it... I mean it seems you pretty much NEVER hear of a turbocharged vehicle making it past 150k miles without requiring some extra work (Turbo rebuild if not more) that a non turbocharged vehicle wouldn't need.
Also it seems they typically require premium fuel, though I'm sure this might be tuned to not require it... and the torque curve is probably pretty flat.
That's good... class leading... but I'm unsure about using a turbo to do it... I mean it seems you pretty much NEVER hear of a turbocharged vehicle making it past 150k miles without requiring some extra work (Turbo rebuild if not more) that a non turbocharged vehicle wouldn't need.
Also it seems they typically require premium fuel, though I'm sure this might be tuned to not require it... and the torque curve is probably pretty flat.
The regular non turbo 1.4L Astra is already rated at 5L/100km which is 47mpg. I don't know why they don't just sell us some Euro spec engines in these smaller cars.
Thread Starter
Registered User
Joined: Jan 2000
Posts: 10,285
From: Albany, NY
Better yet, I just noticed the Astra in Germany comes with a 1.6L Turbo engine and it is rated at 6.2L/100km, according the the calculator I've been using http://www.eforecourt.com/l_100km_mpg_convert.htm That is 37.9mpg, the smaller engine should have no problem toping 40mpg as long as it has the right gearing.
Thread Starter
Registered User
Joined: Jan 2000
Posts: 10,285
From: Albany, NY
Thread Starter
Registered User
Joined: Jan 2000
Posts: 10,285
From: Albany, NY
Registered User
Joined: Sep 2002
Posts: 9,705
From: Oakland, California
Registered User
Joined: Sep 1999
Posts: 602
From: Alpharetta, GA
Registered User
Joined: Sep 2002
Posts: 9,705
From: Oakland, California
For my daily driver? Heck I drive a '02 Tahoe now. :P
I do happen to have a GT-R badge at home. 
Registered User
Joined: Mar 2001
Posts: 4,000
From: TX Med Ctr
It depends on a variety of factors but you don't have to have premium fuel just because it has a turbo. For instance even the now dead VW 1.8T could run on regular, albeit at reduce power from premium. The amount of charge cooling, timing, cylinder pressure.... basically it depends on how you design it.
Registered User
Joined: Jun 2002
Posts: 1,817
From: O-Town
That's good... class leading... but I'm unsure about using a turbo to do it... I mean it seems you pretty much NEVER hear of a turbocharged vehicle making it past 150k miles without requiring some extra work (Turbo rebuild if not more) that a non turbocharged vehicle wouldn't need.
Registered User
Joined: Feb 1999
Posts: 2,947
From: Springfield,OH. U.S.A.
To be uber reliable, a turbo motor should come with a timer that runs the cooling fan and an electric oil circulation pump for a couple of minutes after shut down.
As well as using a synthetic or semi-synthetic oil to fight heat breakdown.
And not dragging out the time between oil changes.
Also maintaining the correct coolant at the correct level.
With a little more attention to cooling and lubrication, they'll last as long as any other motors.
As well as using a synthetic or semi-synthetic oil to fight heat breakdown.
And not dragging out the time between oil changes.
Also maintaining the correct coolant at the correct level.
With a little more attention to cooling and lubrication, they'll last as long as any other motors.