PERFORMANCE ENGINE AND BRAKE FEATURES

1. PERFORMANCEENGINE AND BRAKE FEATURES

2. TOYOTA ENGINE TOPICS MENU Acoustic Control Induction System (ACIS) 4-Valve-Per-Cylinder Design Valvetrain Designs VVT-i Overhead Valve (OHV) • Dual Independent VVT-i Single Overhead Cam (SOHC) Dual-Path Exhaust Double Overhead Cam (DOHC) NEXT SECTION

3. ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS) • Controls airflow into the engine • Provides torque at low rpm or horsepower at high rpm • Power delivery is smooth TOPICS NEXT SECTION

4. VALVETRAIN DESIGNS • Intake valves control the flow of air and fuel into the cylinders • Exhaust valves allow burnt gases to escape from the cylinders • Control of the valves is critical for maximum power, emissions control and peak efficiency • Types: OHV, SOHC, DOHC TOPICS NEXT SECTION

5. OVERHEAD VALVE (OHV) Used by Chevy and Dodge Advantages • Compact engine design Disadvantages • Lacks precise control • Difficult to include more than two valves in the design TOPICS NEXT SECTION

6. SINGLE OVERHEAD CAM (SOHC) Used by Dodge and Ford Advantages • More advanced than OHV • More precise valve timing than OHV Disadvantages • Variable valve timing is compromised • Intake and exhaust valves must be adjusted identically TOPICS NEXT SECTION

7. DOUBLE OVERHEAD CAM (DOHC) Advantages • Precise control of valves with true independent variable valve timing • Power and engine efficiency is increased • More torque at low rpm • Boosts overall performance at higher engine speeds TOPICS NEXT SECTION

8. 4-VALVE-PER-CYLINDER DESIGN • 4 valves (2 intake and 2 exhaust) • Allows more volume flow than 2- or 3-valve cylinder design • Increases engine power TOPICS NEXT SECTION

9. VARIABLE VALVE TIMING WITHINTELLIGENCE (VVT-i) • Adjusts intake camshaft timing • Computer constantly monitorsand retunes to suit driving conditions • Air/fuel mixture control ensures the engine operates at its optimum level • Trucks don’t have tocompromise betweenperformance andfuel economy TOPICS NEXT SECTION

10. DUAL VARIABLE VALVE TIMING WITH INTELLIGENCE (DUAL INDEPENDENT VVT-i) • Adjusts intake and exhaust camshaft timing • Provides a greater range of valve control for enhanced power, torque and fuel economy ratings throughout the power band TOPICS NEXT SECTION

11. DUAL-PATH EXHAUST • Concept similar to ACIS • Maximizes exhaust flow out of the engine • Second path opens in the exhaust system at higher revs • Better engine breathing with less back pressure TOPICS NEXT SECTION

12. BRAKE FEATURES

13. BRAKE BASICS • Slows the vehicle with friction • Brake pads and discs • Brake shoes and drums US-TU07-31-V2-O-FPO2

14. DISC BRAKES • Pistons press brake pads on disc • Generally on front wheels, but many vehicles now have 4-wheel disc brakes • Fixed and floating calipers Floating Caliper 4-Piston Fixed Caliper Disc brakes

15. DRUM BRAKES • Rotating drum attached to wheel • Brake shoes mounted inside the drum press outward • Normally on rear wheels Drum Brake Drum brakes

16. TOYOTA TRUCK BRAKES

17. TOYOTA TRUCK BRAKES