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The BorgWarner developed turbo can produce up to 27 psi (1.9 bar) of boost thanks in part to its unique dual volute turbine housing and an electrically actuated wastegate. Instead of two side-by-side exhaust passages like on a regular twin-scroll turbocharger , in this design the two exhaust passages are concentric and allow for better use of ...
An external wastegate requires a specially constructed turbo manifold with a dedicated runner going to the wastegate. The external wastegate may be part of the exhaust housing itself. External wastegates are commonly used for regulating boost levels more precisely than internal wastegates in high power applications, where high boost levels can ...
[8] [13] The first turbocharged cars were the short-lived Chevrolet Corvair Monza and the Oldsmobile Jetfire, both introduced in 1962. [23] [24] The turbo succeeded in motorsport, but took its time. The 1968 Indianapolis 500 was the first to be won with a turbocharged engine, turbos winning on the fast oval track ever since.
[5] [6] One month after the release of the turbocharged Oldsmobile, a turbocharged version of the Chevrolet Turbo-Air 6 engine was introduced in the Chevrolet Corvair Monza Spyder. [5] This engine did not use a wastegate. [7]: 62, 63, 64 Production of the turbocharged Corvair engine ran until 1966.
The GM E-Turbo engine is a gasoline-fueled engine developed by General Motors as part of the company’s next-generation turbocharged engine family. The engine features a start-stop system , gasoline direct injection , an electric water pump and an electric turbocharger wastegate to optimize fuel efficiency .
This design has a lower flow rate compared to VNT types so a wastegate may be incorporated with this design. [5] VGTs may be controlled by a membrane vacuum actuator, electric servo, 3-phase electric actuation, hydraulic actuator, or pneumatic actuator using air brake pressure. Unlike fixed-geometry turbines, VGTs do not require a wastegate. [6]
A 3-port solenoid-type boost controller A 4-port solenoid-type boost controller (used for a dual-port wastegate). The purpose of a boost controller is to reduce the boost pressure seen by the wastegate's reference port, in order to trick the wastegate into allowing higher boost pressures than it was designed for.
The anti-lag system (ALS) is a method of reducing turbo lag or effective compression used on turbocharged engines to minimize turbo lag on racing or performance cars. It works by retarding the ignition timing and adding extra fuel (and sometimes air) to balance an inherent loss in combustion efficiency with increased pressure at the charging side of the turbo.