Chevrolet 2013 Full-Size Truck Bedienungsanleitung PDF herunterladen (Seite 2)

Volume 20, Number 5 (TS-PU-0005-13)

ACDelco TechConnect is published bi-monthly

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ACDelco

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Chevrolet Silverado 1500 and

GMC Sierra 1500 – continued from page 1

The new 4.3L V6 will offer custom-

ers a state-of-the art truck engine,

SAE-certiﬁed at 285 horsepower and

305 lb.-ft. of torque, the most torque

of any standard V6. The engine is E85

capable.

The new 5.3L V8 is SAE-certiﬁed

at 355 horsepower and 383 lb.-ft.

of torque. With EPA-estimated fuel

economy of 23 mpg highway (2WD),

it is the best fuel economy of any V8

pickup. It is also E85 capable.

The new 6.2L V8, available later

this year, is expected to be the most

capable engine offered in any light-

duty pickup truck.

Flexible Fuel Sensor

The ﬂexible fuel sensor measures

the ethanol-gasoline ratio of the fuel

being used in a ﬂexible fuel (E85 capa-

ble) engine. Flexible fuel vehicles can

be operated with a blend of ethanol

and gasoline, up to 85 percent ethanol.

The ﬂexible fuel sensor uses quick-

connect style fuel connections, an

incoming fuel connection, and an

outgoing fuel connection. All fuel

passes through the ﬂexible fuel sensor

before continuing on to the fuel rail.

The ﬂexible fuel sensor measures

two different fuel related parameters,

and sends an electrical signal to the

Engine Control Module (ECM) to

indicate ethanol percentage and fuel

temperature. Since the ﬂexible fuel

sensor measures the actual percent-

age of ethanol in the fuel, it is no

longer necessary to wait for an empty

fuel tank in order to reﬁll with E85.

Active Fuel Management

Cylinder deactivation, also known

as Active Fuel Management, is now

standard on all three engines. The

system uses oil pressure, controlled

by the Powertrain Control Module,

to deactivate the lifters on selected

cylinders, closing the valves for those

cylinders. It deactivates four of the

cylinders on the V8 engines and two

cylinders on the V6 under light load

conditions — operating the engines

as a V4 — and seamlessly reacti-

vates the cylinders when the driver

demands greater power. The transition

takes less than 20 milliseconds and is

imperceptible.

Advanced Oiling System

The oiling system on the engines

incorporates a new variable displace-

ment two-stage vane-type oil pump

that enables more efﬁcient oil delivery,

based on operating conditions. Its

dual-pressure control enables opera-

tion at a very efﬁcient oil pressure at

lower RPM, and then delivers higher

pressure at higher engine speeds.

An oil control solenoid valve, con-

trolled by the ECM, mounted to the oil

pump provides two-stage functionality.

The oil pump is mounted on the front

of the engine block and driven directly

by the crankshaft sprocket.

An oil passage at camshaft bear-

ing location permits oil ﬂow into the

center of the camshaft. Oil enters the

camshaft, exiting at the front and into

the camshaft position (CMP) actuator

solenoid valve. The CMP valve spool

position is controlled by the ECM and

CMP magnet. When commanded by

the ECM, the CMP magnet repositions

the CMP actuator solenoid valve spool

directing pressurized oil into the CMP

actuator to control valve timing.

continued on page 3

EcoTec3 5.3L V8

EcoTec3 4.3L V6

1 2 3 4 5 6 7 8

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