Publicité
Les langues disponibles
Les langues disponibles
Fig. 3
Tube-oil fill
Cylinder Deactivation - Not Used With Chevrolet Performance Engine Control Kit
In production, to provide maximum fuel economy under light load driving conditions, the engine control module (ECM) will
command the cylinder deactivation system ON to deactivate engine cylinders 1, 7, 6, and 4, switching to a V4 mode. The engine
will operate on 8 cylinders, or V8 mode, during engine starting, engine idling, and medium to heavy throttle applications. This
system requires many inputs (weight of vehicle, tire size, final drive ratio, etc.) to work properly. These parameters are unknown
when selling the Chevrolet Performance engine controller kit. Due to these unknown parameters as well as the need to tune
the motor mounts and exhaust system for operation in both V8 and V4 modes. The Chevrolet Performance engine control kit
disables this feature. The engine has not been changed, so cylinder deactivation hardware is still present.
Ignition System
The Gen-V small block engine has an advanced 58X crankshaft position encoder to ensure that ignition timing is accurate
throughout its operating range. The 58X crankshaft ring and sensor provide more immediate, accurate information on the
crankshaft's position during rotation. This allows the ECM to adjust ignition timing with greater precision, which optimizes
performance and economy. Engine starting is also more consistent in all operating conditions. In conjunction with 58X
crankshaft timing, the Gen-V applies the latest digital cam-timing technology. The cam sensor is located in the front engine
cover, and it reads a 4X sensor target on the camshaft phaser rotor which is attached to the front end of the camshaft. The
target ring has four equally spaced segments that communicate the camshaft's position more quickly and accurately than
previous systems with a single segment. The dual 58X/4X measurement ensures extremely accurate timing for the life of the
engine. Moreover, it provides an effective backup system in the event one sensor fails.
Air Induction Humidity Sensor: This new feature ensures optimal combustion efficiency, regardless of the surrounding air's
humidity.
Coil-on-Plug Ignition: The Gen-V's individual coil-near-plug ignition features advanced coils that are compact and mounted on
the rocker covers, although they are positioned differently than on Gen-IV engine. An individual coil for each spark plug delivers
maximum voltage and consistent spark density, with no variation between cylinders.
Iridium-Tip Spark Plugs: The spark plugs have an iridium electrode tip and an iridium core in the conductor, offering higher
internal resistance while maintaining optimal spark density over its useful life. The electrode design improves combustion
efficiency.
Fuel System
Low Pressure (Fuel Tank To Engine)
The production system uses a returnless variable flow/pressure system that has been incorporated in the Chevrolet
Performance engine control kit. A returnless fuel system reduces the internal temperature of the fuel tank by controlling the
speed of the fuel pump and not returning hot fuel from the engine to the fuel tank. If using the Chevrolet Performance engine
control kit, a pulse width modulation capable fuel pump that delivers 500 kPa (72psi) at 45 gallons per hour is required. If not
using the Chevrolet Performance engine control system, then a fuel pump and a regulator that delivers 500kPa (72psi) with 45
gallons per hour of flow must be used.
LT4 Wet Sump Engine
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
19332622
IR 02JA18
PART NO.
DATE
17AU15
Initial Release - Rocko Parker
02JA18
Revision - Rocko Parker
3
SHEET
REVISION
35
OF
AUTH
ECA P5E00313
N/A
Publicité
