Improve physical geometry, fluid solvers, audio, and profiling

engines/single-450.toml

@@ -1,5 +1,5 @@
 # Engine definition. Dimensional keys state their units.
-schema_version = 1
+schema_version = 2
 id = "single-450"
 name = "450 cc / carbureted four-stroke thumper"
 category = "Singles / four-stroke"
@@ -7,9 +7,11 @@ description = "40 mm carb / mild valve timing / fixed idle stop"
 order = 17
 cycle = "four_stroke"
 
+[simulation]
+cells_per_meter = 20.0
+
 [engine]
 bank_angle_deg = 60.0
-collector_volume_litres = 0.25
 cylinders = 1
 initial_rpm = 1960.0
 initialize_phased_charge = true
@@ -18,7 +20,6 @@ maximum_load_torque_nm = 30.0
 minimum_substeps = 1
 phase_degrees = [0.0]
 pipe_damping = 1.0
-plenum_volume_litres = 1.0
 starter_torque_nm = 11.21926
 throttle_diameter_mm = 40.0
 topology = "collector"
@@ -31,18 +32,12 @@ burn_duration_deg = 60.0
 burn_start_deg = 5.0
 compression = 10.0
 energy_variation = 0.05
-exhaust_close_deg = 370.0
-exhaust_open_deg = 145.0
 exhaust_valve_count = 1
 exhaust_valve_diameter_mm = 30.72
-exhaust_valve_lift_mm = 8.640001
 fuel_lhv_j_per_kg = 4.4e+07
 heat_transfer = 100.0
-intake_close_deg = 565.0
-intake_open_deg = 355.0
 intake_valve_count = 1
 intake_valve_diameter_mm = 36.48
-intake_valve_lift_mm = 9.6
 misfire_probability = 0.0
 rod_mm = 111.6
 stroke_mm = 62.0
@@ -73,8 +68,8 @@ overrun_resume_rpm = 2400.0
 power_afr = 12.8
 rev_limit_enabled = true
 rev_limit_fuel_cut_enabled = false
-rev_limit_rpm = 7000.0
-rev_resume_rpm = 6750.0
+rev_limit_rpm = 13000.0
+rev_resume_rpm = 12990.0
 stoichiometric_afr = 14.7
 throttle_closing_rate = 0.0
 throttle_closing_time_constant_s = 0.0
@@ -113,24 +108,165 @@ bowl_refill_kg_per_s = 0.1
 
 [[pipes]]
 id = "intake"
-cells = 4
 diameter_mm = 75.0
-length_mm = 200.0
 
 [[pipes]]
 id = "runners"
-cells = 5
 diameter_mm = 35.0
-length_mm = 250.0
 
 [[pipes]]
 id = "primaries"
-cells = 13
 diameter_mm = 38.0
-length_mm = 650.0
 
 [[pipes]]
 id = "tailpipe"
-cells = 30
 diameter_mm = 60.0
-length_mm = 1500.0
+
+[cam.intake]
+points = [
+  [0.000, 0.000000],
+  [355.000, 0.000000],
+  [360.000, 0.244639],
+  [365.000, 0.912213],
+  [370.000, 1.903207],
+  [375.000, 3.118108],
+  [380.000, 4.457402],
+  [385.000, 5.821574],
+  [390.000, 7.111111],
+  [395.000, 8.226498],
+  [400.000, 9.068222],
+  [405.000, 9.536767],
+  [407.500, 9.600000],
+  [512.500, 9.600000],
+  [517.500, 9.355361],
+  [522.500, 8.687787],
+  [527.500, 7.696793],
+  [532.500, 6.481892],
+  [537.500, 5.142598],
+  [542.500, 3.778426],
+  [547.500, 2.488889],
+  [552.500, 1.373502],
+  [557.500, 0.531778],
+  [562.500, 0.063233],
+  [565.000, 0.000000],
+  [720.000, 0.000000]
+]
+
+[cam.exhaust]
+points = [
+  [0.000, 0.000000],
+  [145.000, 0.000000],
+  [150.000, 0.192664],
+  [155.000, 0.722110],
+  [160.000, 1.515520],
+  [165.000, 2.500077],
+  [170.000, 3.602963],
+  [175.000, 4.751361],
+  [180.000, 5.872451],
+  [185.000, 6.893417],
+  [190.000, 7.741441],
+  [195.000, 8.343705],
+  [200.000, 8.627391],
+  [201.250, 8.640001],
+  [313.750, 8.640001],
+  [318.750, 8.447337],
+  [323.750, 7.917891],
+  [328.750, 7.124481],
+  [333.750, 6.139924],
+  [338.750, 5.037038],
+  [343.750, 3.888640],
+  [348.750, 2.767550],
+  [353.750, 1.746584],
+  [358.750, 0.898560],
+  [363.750, 0.296296],
+  [368.750, 0.012610],
+  [370.000, 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 = [ 0, 0, 0 ]
+tilt_deg = 0.0
+
+# intake
+[[geometry.pipes]]
+index = 0
+points_mm = [
+  [ -257, 141.4889, -374.8 ],
+  [ -57, 141.4889, -374.8 ]
+]
+
+# runners
+[[geometry.pipes]]
+index = 1
+points_mm = [
+  [ 0, 141.4889, -288.4 ],
+  [ 0, 141.4889, -38.4 ]
+]
+
+# primaries
+[[geometry.pipes]]
+index = 2
+points_mm = [
+  [ 0, 141.4889, 48 ],
+  [ 0.943, 138.6704, 60.5191 ],
+  [ 3.6081, 134.2865, 71.5364 ],
+  [ 7.7491, 128.4585, 81.1477 ],
+  [ 13.1202, 121.3077, 89.4488 ],
+  [ 19.4754, 112.9555, 96.5354 ],
+  [ 26.5685, 103.5233, 102.5034 ],
+  [ 34.1536, 93.1325, 107.4485 ],
+  [ 41.9848, 81.9043, 111.4664 ],
+  [ 49.8159, 69.9601, 114.6529 ],
+  [ 57.4011, 57.4214, 117.1039 ],
+  [ 64.4942, 44.4093, 118.915 ],
+  [ 70.8493, 31.0454, 120.1821 ],
+  [ 76.2204, 17.451, 121.0009 ],
+  [ 80.3615, 3.7474, 121.4672 ],
+  [ 83.0265, -9.944, 121.6767 ],
+  [ 83.9696, -23.502, 121.7253 ]
+]
+
+# tailpipe
+[[geometry.pipes]]
+index = 3
+points_mm = [
+  [ 131.4981, -55, 135.8 ],
+  [ 1631.4981, -55, 135.8 ]
+]
+
+[[geometry.volumes]]
+id = "intake_plenum"
+center_mm = [ 0, 141.4889, -374.8 ]
+size_mm = [ 114, 50.7635, 172.8 ]
+
+[[geometry.volumes]]
+id = "exhaust_collector"
+center_mm = [ 100, -55, 135.8 ]
+size_mm = [ 62.9961, 62.9961, 62.9961 ]