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An internal wastegate is a built-in bypass valve and passage within the turbocharger housing which allows excess exhaust pressure to bypass the turbine into the downstream exhaust. Control of the internal wastegate valve by a pressure signal from the intake manifold is identical to that of an external wastegate.
Most modern designs are electronic boost controllers that use an electronic control unit to control the boost via a solenoid or stepper motor. The operating principle is the same as older manual boost controllers, which is to control the air pressure presented to the wastegate actuator. Electronic controllers add greater flexibility in ...
OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.
If it is, then the control unit activates a solenoid valve that directs boost pressure to the turbocharger's pneumatically controlled wastegate, that opens to bypass exhaust gases from the turbocharger directly to the exhaust pipe, lowering turbo boost pressure until the knock subsides. Knock events that are managed by the APC can be discerned ...
The traction control system (TCS) intervenes; the knock control system intervenes; The ECM regulates the throttle area (opening angle) together with the turbo wastegate so that the correct torque is attained, i.e. air mass per combustion. Fuel injection is sequential and regulated with air mass per combustion and engine speed as parameters.
These produce up to 20 psi (1.4 bar) and are matched with electronic wastegate control for more precise boost management and more responsive torque production. Ninety percent of the engine's peak torque is available at 2000 rpm and carried through 5200 rpm.
Where they met, there was a wastegate valve; keeping the wastegate valve away from the turbine housing improved flow where it mattered most. Maximum boost in stock form was around 14 psi (97 kPa). Piston velocities and valve-train components force a rev limit of 6240 rpm although MOPAR upped the ante with their Stage 2 and 3 kits which have a ...
The i-DTEC engine uses a 2-Stage turbocharger from Wastegate Type & Variable Geometry Turbocharger (VGT) left/right. It enables strong power from about 1,500 rpm. With Diesel particulate filter (DPF), Start-stop system, Exhaust gas recirculation system (EGR) & Small Size Intercooler.