Page 196 - Understanding Automotive Electronics

2735 | CH 5 Page 183 Tuesday, March 10, 1998 11:10 AM

THE BASICS OF ELECTRONIC ENGINE CONTROL 5

Quiz for Chapter 5

1. What is the primary motivation 5. What does secondary air do?
for engine controls? a. dilutes the air/fuel ratio
a. consumer demand for precise b. helps oxidize HC and CO in
controls the exhaust manifold
b. the automotive industry’s c. helps oxidize NO and CO in
x
desire to innovate the catalytic converter
c. government regulations d. helps reduce the production
concerning emissions and fuel of NO x
economy
6. What is air/fuel ratio?
2. What is the primary purpose of a. the mass of air in a cylinder
fuel control? divided by the mass
a. to minimize fuel economy of fuel
b. to eliminate exhaust emissions b. the volume of air in a cylinder
c. to optimize catalytic converter divided by the volume
efficiency of fuel
d. to maximize engine torque c. the ratio of the mass of HC to
3. What is the primary purpose of mass of NO x
spark timing controls? 7. What electronic device is used in
a. to maximize fuel economy engine controls?
b. to minimize exhaust emissions a. AM radio
c. to optimize catalytic converter b. catalytic converter
efficiency c. microcomputer
d. to optimize some aspect of
engine performance (e.g., 8. What air/fuel ratio is desired
torque) for a three-way catalytic
converter?
4. What does exhaust gas
recirculation do? a. 12:1
b. 17:1
a. improves fuel economy c. 14.7:1
b. reduces NO emission d. none of the above
x
c. increases engine torque
d. provides air for the catalytic
converter

UNDERSTANDING AUTOMOTIVE ELECTRONICS 183