1. TURBOCHARGERS & SUPERCHARGERS
CHAPTER 7

2. FORCED INDUCTION 4 WAYS TO INCREASE COMPRESSION SUPERCHARGING
TURBOCHARGING
CHEMICAL
ENGINE MODIFICATION

3. TURBOCHARGERS COMPRESSES AIR GOING INTO COMBUSTION CHAMBER
DEPENDS ON RAPID EXPANSION OF EXHAUST GASES LEAVING COMBUSTION CHAMBER
TURBO LAG IS A CHARACTERISTIC

4. TURBOCHARGER PARTS TURBINE SHAFT COMPRESSOR WASTEGATE ACTUATOR
CENTER HOUSING
CONTAINS COOLING SECTION
222C

5. VANE WHEELS
TURN AT 100,000 RPM

6. TURBO CYCLE EXHAUST GAS FORCES TURBINE TO ROTATE
COMPRESSOR FORCES (PACKS) CREATING A DENSE AIR-FUEL MIXTURE
CREATES A POSITVE PRESSURE (BOOST)

7. BOOST PRESSURE CONTROL
WASTEGATE DIAPHRAGM
CONTROLS BOOST PRESSURE
MECHANICAL OR ELECTRONICALLY CONTROLS WASTEGATE OPERATION
224C

8. TURBOCHARGER COOLING EXHAUST FLOW PAST TURBINE WHEEL CAUSES HIGH TEMPS
WATER COOLING
OIL COOLING
OIL SEALS
MUST LET TURBO COOL DOWN ON SHUTOFF

9. HEAVY DUTY APPLICATION
SAME PRINCIPLE AS SMALLER ONES
BOOST PRESSURE SLIGHTLY HIGHER
COOLING A LOT MORE IMPORTANT
DIESEL TRUCK, LOCOMOTIVE, HEAVY EQUIPMENT

10. POWER OUTPUT COMPARISON

11. ROTARY RACING ENGINE

12. MAINTENANCE / PROBLEMS
LACK OF OIL
DIRTY OIL
MECHANICAL DAMAGE OF VANE WHEELS
WASTEGATE CONTROL PROBLEMS
OIL CAKING

13. DIAGNOSIS OIL LEAKS, HOSES, LINKAGES BLUE SMOKE EXCESSIVE NOISE
PAGE 302 LAB
OIL LEAKS, HOSES, LINKAGES
BLUE SMOKE
EXCESSIVE NOISE
EXHAUST LEAKS
TEST BOOST PRESSURE
TURBO R & R REQUIRES PRE-LUBING

14. SUPERCHARGERS

15. SUPERCHARGER OPERATION
BELT OR GEAR DRIVEN
ROTORS ACT LIKE A PUMP AND COMPRESS AIR (PAGE 310 LAB)
SUPERCHARGER SPEED IS LIMITED BY ENGINE SPEED -TURNS A LOT SLOWER
SOMETIMES USED WITH INTERCOOLER TO COOL AIR
BYPASS BUTTERFLY VALVE 230 LAB

16. BLOWN ENGINE MORE RELIABLE THAN A TURBO
MUST RECEIVE PROPER LUBRICATION
IMPROVED THROTTLE RESPONSE OVER A TURBO