# Engine definition. Dimensional keys state their units.
schema_version = 2
id = "f20"
name = "F20C-inspired / 2.0 high-rev four"
category = "Inline four / specials"
description = "Unequal primaries / small junctions / staged collectors / EFI"
order = 22
cycle = "four_stroke"

[simulation]
cells_per_meter = 20.0

[engine]
bank_angle_deg = 60.0
cylinders = 4
initial_rpm = 1400.0
initialize_phased_charge = true
layout = "inline"
maximum_load_torque_nm = 30.0
minimum_substeps = 1
phase_degrees = [0.0, 180.0, 540.0, 360.0]
pipe_damping = 0.0
starter_torque_nm = 49.9353
throttle_diameter_mm = 65.0
topology = "staged"

[cylinder]
afr = 14.7
ambient_temperature_k = 300.0
bore_mm = 87.0
burn_duration_deg = 60.0
burn_start_deg = 5.0
compression = 10.0
energy_variation = 0.05
exhaust_valve_count = 1
exhaust_valve_diameter_mm = 27.84
fuel_lhv_j_per_kg = 4.4e+07
heat_transfer = 100.0
intake_valve_count = 1
intake_valve_diameter_mm = 33.06
misfire_probability = 0.0
rod_mm = 151.2
stroke_mm = 84.0
wall_area = 0.02
wiebe_a = 5.0
wiebe_m = 2.0

[crankshaft]
friction_constant_nm = 7.989648
friction_quadratic_nm_s2 = 0.0
friction_viscous_nm_s = 0.007989648
inertia_kg_m2 = 0.2396894

[ecu]
idle_base_opening = 0.05
idle_control = "feedback"
idle_ki = 4e-05
idle_kp = 0.0001
idle_max_opening = 0.25
idle_minimum_advance_deg = -5.0
idle_rpm = 1000.0
idle_spark_gain = 0.02
ignition_map = [[0.0, 10.0], [15000.0, 40.0]]
overrun_cut_rpm = 3500.0
overrun_fuel_cut_enabled = true
overrun_ignition_cut_enabled = false
overrun_resume_rpm = 2400.0
power_afr = 12.8
rev_limit_enabled = true
rev_limit_fuel_cut_enabled = true
rev_limit_rpm = 9000.0
rev_resume_rpm = 8750.0
stoichiometric_afr = 14.7
throttle_closing_rate = 0.0
throttle_closing_time_constant_s = 0.0
throttle_rate = 1000.0
throttle_time_constant_s = 0.001

[vehicle]
air_density = 1.225
clutch_capacity = 439.4306
clutch_engagement_rate = 8.0
drag_coefficient = 0.7
final_drive_ratio = 2.7
frontal_area = 0.65
gear_ratios = [4.1, 2.7, 2.0, 1.55, 1.25, 0.98]
gravity = 9.80665
mass_kg = 1400.0
primary_reduction = 1.8
rolling_resistance = 0.015
rotational_inertia_kg_m2 = 1.2
wheel_radius_mm = 320.0

[fuel]
system = "injection"

[junctions]
h_pipe = true

[[pipes]]
id = "intake"
diameter_mm = 75.0

[[pipes]]
id = "runners"
count = 4
diameter_mm = 35.0

[[pipes]]
id = "primary_1"
diameter_mm = 38.0

[[pipes]]
id = "primary_2"
diameter_mm = 38.0

[[pipes]]
id = "primary_3"
diameter_mm = 38.0

[[pipes]]
id = "primary_4"
diameter_mm = 38.0

[[pipes]]
id = "tailpipe_9"
diameter_mm = 60.0

[[pipes]]
id = "secondary_10"
diameter_mm = 48.0

[[pipes]]
id = "secondary_11"
diameter_mm = 48.0

[cam.intake]
points = [
  [0.000, 0.000000],
  [340.000, 0.000000],
  [345.000, 0.158131],
  [350.000, 0.596890],
  [355.000, 1.262822],
  [360.000, 2.102477],
  [365.000, 3.062400],
  [370.000, 4.089139],
  [375.000, 5.129242],
  [380.000, 6.129254],
  [385.000, 7.035725],
  [390.000, 7.795200],
  [395.000, 8.354227],
  [400.000, 8.659354],
  [402.500, 8.700000],
  [527.500, 8.700000],
  [532.500, 8.541869],
  [537.500, 8.103110],
  [542.500, 7.437178],
  [547.500, 6.597523],
  [552.500, 5.637600],
  [557.500, 4.610861],
  [562.500, 3.570758],
  [567.500, 2.570746],
  [572.500, 1.664275],
  [577.500, 0.904800],
  [582.500, 0.345773],
  [587.500, 0.040646],
  [590.000, 0.000000],
  [720.000, 0.000000]
]

[cam.exhaust]
points = [
  [0.000, 0.000000],
  [130.000, 0.000000],
  [135.000, 0.131866],
  [140.000, 0.498953],
  [145.000, 1.058493],
  [150.000, 1.767720],
  [155.000, 2.583864],
  [160.000, 3.464160],
  [165.000, 4.365840],
  [170.000, 5.246136],
  [175.000, 6.062280],
  [180.000, 6.771507],
  [185.000, 7.331047],
  [190.000, 7.698134],
  [195.000, 7.830000],
  [325.000, 7.830000],
  [330.000, 7.698134],
  [335.000, 7.331047],
  [340.000, 6.771507],
  [345.000, 6.062280],
  [350.000, 5.246136],
  [355.000, 4.365840],
  [360.000, 3.464160],
  [365.000, 2.583864],
  [370.000, 1.767720],
  [375.000, 1.058493],
  [380.000, 0.498953],
  [385.000, 0.131866],
  [390.000, 0.000000],
  [720.000, 0.000000]
]

[valves.intake]
mass_g = 35.0
spring_rate_n_per_mm = 38.0
damping_n_s_per_m = 24.0
seat_force_n = 75.0
maximum_lift_mm = 15.0
seat_restitution = 0.005
cam_restitution = 0.01
stop_restitution = 0.01

[valves.exhaust]
mass_g = 35.0
spring_rate_n_per_mm = 38.0
damping_n_s_per_m = 24.0
seat_force_n = 75.0
maximum_lift_mm = 15.0
seat_restitution = 0.005
cam_restitution = 0.01
stop_restitution = 0.01

[valve_sound]
mode_hz = 3600.0
effective_mass_g = 180.0
radiation_area_cm2 = 10.0
damping_ratio = 0.9

[[geometry.cylinders]]
origin_mm = [ -157.5, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ -52.5, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 52.5, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 157.5, 0, 0 ]
tilt_deg = 0.0

# intake
[[geometry.pipes]]
index = 0
points_mm = [
  [ -410, 194.5333, -363.1 ],
  [ -210, 194.5333, -363.1 ]
]

# runners 1
[[geometry.pipes]]
index = 1
points_mm = [
  [ -157.5, 194.5333, -284.8 ],
  [ -157.5, 194.5333, -34.8 ]
]

# runners 2
[[geometry.pipes]]
index = 2
points_mm = [
  [ -52.5, 194.5333, -284.8 ],
  [ -52.5, 194.5333, -34.8 ]
]

# runners 3
[[geometry.pipes]]
index = 3
points_mm = [
  [ 52.5, 194.5333, -284.8 ],
  [ 52.5, 194.5333, -34.8 ]
]

# runners 4
[[geometry.pipes]]
index = 4
points_mm = [
  [ 157.5, 194.5333, -284.8 ],
  [ 157.5, 194.5333, -34.8 ]
]

# primary_1
[[geometry.pipes]]
index = 5
points_mm = [
  [ -157.5, 194.5333, 43.5 ],
  [ -156.9599, 191.2299, 56.8381 ],
  [ -155.4334, 185.7695, 68.1689 ],
  [ -153.0615, 178.3497, 77.6508 ],
  [ -149.9852, 169.1678, 85.4419 ],
  [ -146.3452, 158.4214, 91.7006 ],
  [ -142.2825, 146.3079, 96.5849 ],
  [ -137.9379, 133.0247, 100.2531 ],
  [ -133.4525, 118.7693, 102.8634 ],
  [ -128.9671, 103.7391, 104.5741 ],
  [ -124.6226, 88.1316, 105.5434 ],
  [ -120.5599, 72.1442, 105.9294 ],
  [ -116.9199, 55.9744, 105.8905 ],
  [ -113.8435, 39.8197, 105.5848 ],
  [ -111.4716, 23.8774, 105.1705 ],
  [ -109.9452, 8.3451, 104.806 ],
  [ -109.4051, -6.5798, 104.6493 ]
]

# primary_2
[[geometry.pipes]]
index = 6
points_mm = [
  [ -52.5, 194.5333, 43.5 ],
  [ -53.0401, 191.2299, 56.8381 ],
  [ -54.5666, 185.7695, 68.1689 ],
  [ -56.9385, 178.3497, 77.6508 ],
  [ -60.0148, 169.1678, 85.4419 ],
  [ -63.6548, 158.4214, 91.7006 ],
  [ -67.7175, 146.3079, 96.5849 ],
  [ -72.062, 133.0247, 100.2531 ],
  [ -76.5475, 118.7693, 102.8634 ],
  [ -81.0329, 103.7391, 104.5741 ],
  [ -85.3774, 88.1316, 105.5434 ],
  [ -89.4401, 72.1442, 105.9294 ],
  [ -93.0801, 55.9744, 105.8905 ],
  [ -96.1565, 39.8197, 105.5848 ],
  [ -98.5284, 23.8774, 105.1705 ],
  [ -100.0548, 8.3451, 104.806 ],
  [ -100.5949, -6.5798, 104.6493 ]
]

# primary_3
[[geometry.pipes]]
index = 7
points_mm = [
  [ 52.5, 194.5333, 43.5 ],
  [ 53.0401, 191.1567, 58.187 ],
  [ 54.5666, 185.761, 71.4839 ],
  [ 56.9385, 178.5161, 83.4517 ],
  [ 60.0148, 169.5922, 94.1515 ],
  [ 63.6548, 159.1591, 103.6443 ],
  [ 67.7175, 147.387, 111.9912 ],
  [ 72.062, 134.4458, 119.2533 ],
  [ 76.5475, 120.5056, 125.4917 ],
  [ 81.0329, 105.7364, 130.7675 ],
  [ 85.3774, 90.3081, 135.1416 ],
  [ 89.4401, 74.3909, 138.6753 ],
  [ 93.0801, 58.1546, 141.4295 ],
  [ 96.1565, 41.7694, 143.4654 ],
  [ 98.5284, 25.4053, 144.8439 ],
  [ 100.0548, 9.2322, 145.6263 ],
  [ 100.5949, -6.5798, 145.8735 ]
]

# primary_4
[[geometry.pipes]]
index = 8
points_mm = [
  [ 157.5, 194.5333, 43.5 ],
  [ 156.9599, 191.1567, 58.187 ],
  [ 155.4334, 185.761, 71.4839 ],
  [ 153.0615, 178.5161, 83.4517 ],
  [ 149.9852, 169.5922, 94.1515 ],
  [ 146.3452, 159.1591, 103.6443 ],
  [ 142.2825, 147.387, 111.9912 ],
  [ 137.9379, 134.4458, 119.2533 ],
  [ 133.4525, 120.5056, 125.4917 ],
  [ 128.9671, 105.7364, 130.7675 ],
  [ 124.6226, 90.3081, 135.1416 ],
  [ 120.5599, 74.3909, 138.6753 ],
  [ 116.9199, 58.1546, 141.4295 ],
  [ 113.8435, 41.7694, 143.4654 ],
  [ 111.4716, 25.4053, 144.8439 ],
  [ 109.9452, 9.2322, 145.6263 ],
  [ 109.4051, -6.5798, 145.8735 ]
]

# tailpipe_9
[[geometry.pipes]]
index = 9
points_mm = [
  [ 218.4202, -70, 170.25 ],
  [ 1718.4201, -70, 170.25 ]
]

# secondary_10
[[geometry.pipes]]
index = 10
points_mm = [
  [ -86.5798, -27.7177, 113.8736 ],
  [ -68.2776, -28.1621, 114.4661 ],
  [ -50.5923, -29.4178, 116.1404 ],
  [ -33.4358, -31.3689, 118.7419 ],
  [ -16.7199, -33.8997, 122.1162 ],
  [ -0.3565, -36.8941, 126.1088 ],
  [ 15.7426, -40.2362, 130.5649 ],
  [ 31.6653, -43.8101, 135.3302 ],
  [ 47.5, -47.5, 140.25 ],
  [ 63.3347, -51.1899, 145.1698 ],
  [ 79.2574, -54.7638, 149.9351 ],
  [ 95.3565, -58.1059, 154.3912 ],
  [ 111.7199, -61.1003, 158.3838 ],
  [ 128.4358, -63.6311, 161.7581 ],
  [ 145.5923, -65.5822, 164.3596 ],
  [ 163.2777, -66.838, 166.0339 ],
  [ 181.5798, -67.2823, 166.6264 ]
]

# secondary_11
[[geometry.pipes]]
index = 11
points_mm = [
  [ 123.4202, -33.7253, 158.1585 ],
  [ 127.6728, -34.0347, 158.2616 ],
  [ 131.6784, -34.9091, 158.553 ],
  [ 135.4722, -36.2677, 159.0059 ],
  [ 139.0895, -38.0299, 159.5933 ],
  [ 142.5657, -40.115, 160.2883 ],
  [ 145.9359, -42.4421, 161.064 ],
  [ 149.2356, -44.9307, 161.8936 ],
  [ 152.5, -47.5, 162.75 ],
  [ 155.7644, -50.0693, 163.6064 ],
  [ 159.0641, -52.5579, 164.436 ],
  [ 162.4343, -54.8851, 165.2117 ],
  [ 165.9105, -56.9701, 165.9067 ],
  [ 169.5278, -58.7323, 166.4941 ],
  [ 173.3216, -60.0909, 166.947 ],
  [ 177.3272, -60.9653, 167.2384 ],
  [ 181.5798, -61.2747, 167.3415 ]
]

[[geometry.volumes]]
id = "intake_plenum"
center_mm = [ 0, 194.5333, -363.1 ]
size_mm = [ 420, 60.8162, 156.6 ]

[[geometry.volumes]]
id = "junction_0"
center_mm = [ -105, -25, 110.25 ]
size_mm = [ 36.8403, 36.8403, 36.8403 ]

[[geometry.volumes]]
id = "junction_1"
center_mm = [ 105, -25, 155.25 ]
size_mm = [ 36.8403, 36.8403, 36.8403 ]

[[geometry.volumes]]
id = "junction_2"
center_mm = [ 200, -70, 170.25 ]
size_mm = [ 36.8403, 36.8403, 36.8403 ]