# Chapter 5 : Combustion in SI Engines¶

## Example 5.1 Page No : 178¶

In [1]:
#Given:
theta_s = 25.      #Angle at which spark occured before top dead centre in degrees
theta_d = 3.      #Angle at which delay ended before top dead centre in degrees
theta_c = -12.      #Angle at which combustion finish after top dead centre in degrees
p = 15.      #Percentage increase of delay period at half clomath.sing the throttle

#Solution:
DP = theta_s-theta_d      #Delay period in degrees
CP = theta_d-theta_c      #Combustion period in degrees
#(a)Full throttle, half speed
DA1 = DP/2      #Delay angle in degrees
TP1 = DA1+CP      #Total period in degrees
TS1 = TP1+theta_c      #Time of spark before top dead centre in degrees
#(b)Half throttle, half speed
DA2 = (DP/2)+(DP/2)*p/100      #Delay angle in degrees
TP2 = DA2+CP      #Total period in degrees
TS2 = TP2+theta_c      #Time of spark before top dead centre in degrees

#Results:
print " a)Full throttle, half speed\t Time of spark before top dead centre is %d degree"%(TS1)
print " a)Half throttle, half speed\t Time of spark before top dead centre is %.2f degree"%(TS2)

 a)Full throttle, half speed	 Time of spark before top dead centre is 14 degree
a)Half throttle, half speed	 Time of spark before top dead centre is 15.65 degree
The text passage contains a technical example from a chapter on combustion in SI engines. It includes given values, a solution with calculations, and the results of those calculations.
single_question_with_answer
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
# Chapter 5 : Combustion in SI Engines¶

## Example 5.1 Page No : 178¶

In [1]:
#Given:
theta_s = 25.      #Angle at which spark occured before top dead centre in degrees
theta_d = 3.      #Angle at which delay ended before top dead centre in degrees
theta_c = -12.      #Angle at which combustion finish after top dead centre in degrees
p = 15.      #Percentage increase of delay period at half clomath.sing the throttle

#Solution:
DP = theta_s-theta_d      #Delay period in degrees
CP = theta_d-theta_c      #Combustion period in degrees
#(a)Full throttle, half speed
DA1 = DP/2      #Delay angle in degrees
TP1 = DA1+CP      #Total period in degrees
TS1 = TP1+theta_c      #Time of spark before top dead centre in degrees
#(b)Half throttle, half speed
DA2 = (DP/2)+(DP/2)*p/100      #Delay angle in degrees
TP2 = DA2+CP      #Total period in degrees
TS2 = TP2+theta_c      #Time of spark before top dead centre in degrees

#Results:
print " a)Full throttle, half speed\t Time of spark before top dead centre is %d degree"%(TS1)
print " a)Half throttle, half speed\t Time of spark before top dead centre is %.2f degree"%(TS2)

 a)Full throttle, half speed	 Time of spark before top dead centre is 14 degree
a)Half throttle, half speed	 Time of spark before top dead centre is 15.65 degree
user
The text passage contains a technical example from a chapter on combustion in SI engines. It includes given values, a solution with calculations, and the results of those calculations.

TYPE: SINGLE_QUESTION_WITH_ANSWER