An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines (such as steam engines) burn a fuel to create heat, which then creates motion.Electric motors convert electrical energy into mechanical motion, pneumatic motors use compressed air and others—such as clockwork motors in wind-up toys—use elastic energy. In biological systems, molecular motors, like myosins in muscles, use chemical energy to create motion
SPECIFICATION
For the specs of engine, the latest engine is the new 3.6-liter, direct-injected V6 motor, similar to the one in the CTS, which puts out 308 horsepower, and 265 lb-ft of torque at a low down 2400 rpm. It’s a huge improvement over the previous year’s offerings of the 3.0-liter V6 or even the 2.8-liter Turbo V6. And gas mileage on our AWD test car is still a respectable 16 mph city and 23 mpg highway, which is 1 mpg fewer than the standard front wheel drive models. During a 500-mile highway trip, our SRX registered 25.5 mpg when cruising at 70 miles per hour and 23 mpg when at 75 miles per hour. Regular gas is recommended, instead of Premium that was required on last year’s turbo.
V6 ENGINE
A V6 engine is a V engine with six cylinders mounted on the crankcase in two banks of three cylinders, usually set at either a right angle or an acute angle to each other, with all six pistons driving a common crankshaft. It is the second most common engine configuration in modern cars after the inline four
LATEST ENGINE
For the 2013 Cadillac SRX, a new 3.6-liter V6 replaces both of the previous engine choices. The six-speed automatic transmission also gains a fuel-saving Eco mode. In terms of features, Bluetooth is now standard, while a heated steering wheel is standard on all trims except the base SRX. Cadillac says it also retuned the suspension and added more sound insulation for a more comfortable and quiet ride.
In the SRX, its output shrinks by four horsepower and eight pound-feet, due to some tweaks to the induction system. Replacing those two engines is a single 3.6-liter V-6. “This is the engine the SRX should have had all along,” said an engineer who didn’t wish to be named. The engine is similar to the 3.6-liter V-6 found in the CTS, but it’s adapted and tweaked for the SRX’s transverse arrangement. A few of the changes—like the clever exhaust manifolds integrated into the heads, the plastic intake manifold, and lighter connecting rods—help shave 20 pounds off the 3.6-liter V-6. Lightening the connecting rods allows the engine to rev a bit higher, and the higher revs lead to 308 hp at 6800 rpm. Other changes, like additional sound deadening in the firewall and a clever rubber-isolated high-pressure fuel line, keep engine noises out of the cabin. Putting rubber between the fuel line and engine nearly eliminates the injector ticking sound we’ve come to expect from direct-injection engines at idle.
No comments:
Post a Comment