CBC AUTOMOTIVE RK AIR INJECTION • Chapter 8 • Page 272 Classroom Manual • Page 353 Lab Manual
CBC AUTOMOTIVE RK OBJECTIVES - CLASSROOM • Describe the operation of a pulsed secondary Air Injection System. • Explain the operation of a secondary Air Injection System when the engine is started. • Describe the operation of a secondary Air Injection System during engine warm-up. • Describe operation at normal operating temp.
CBC AUTOMOTIVE RK OBJECTIVES - LAB • Diagnose and service pulsed Air Injection Systems. • Diagnose and service secondary Air Injection Systems. • Use a scan tester to diagnose secondary Air Injection Systems. • Diagnose engine performance problems caused by AIR defects.
CBC AUTOMOTIVE RK AIR INJECTION SYSTEMS • There are two types; • Pulsed Air Injection • Pump type AIR systems
CBC AUTOMOTIVE RK PULSED AIR INJECTION • Identified by the absence of a pump. • Main components; • Manifold with Check valves • Hoses • Filter Page 274 Classroom 354 Lab
CBC AUTOMOTIVE RK SYSTEM DESIGN • Main system components are; • Air Pump • AIR Bypass valve • AIR Divert valve • Check valves • Manifolds and Hoses • Filter Page 274 Classroom 355 Lab
CBC AUTOMOTIVE RK THERMACTOR
CBC AUTOMOTIVE RK INITIAL START-UP • PCM de-energizes AIR Bypass solenoid. • PCM de-energizes AIR Divert solenoid. • Air flow is bypassed to atmosphere. Page 277 Classroom 356 Lab
CBC AUTOMOTIVE RK ENGINE WARM-UP • PCM energizes AIR Bypass solenoid. • PCM energizes AIR Divert solenoid. • Air flow is upstream, to exhaust manifolds. • Air is used to continue burning HC. Page 277 Classroom 357 Lab
CBC AUTOMOTIVE RK NORMAL OPERATING TEMP • PCM keeps AIR Bypass solenoid energized. • PCM de-energizes AIR Divert solenoid. • Air flow is downstream. • Air is used in the converter for oxidation. Page 278 Classroom 358 Lab