mirror of https://github.com/rusefi/rusefi.git
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#include "pch.h"
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#include "vehicle_speed_converter.h"
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float GetVssFor(float revPerKm, float axle, float teeth, float hz) {
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EngineTestHelper eth(engine_type_e::TEST_ENGINE);
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VehicleSpeedConverter dut;
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engineConfiguration->driveWheelRevPerKm = revPerKm;
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engineConfiguration->vssGearRatio = axle;
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engineConfiguration->vssToothCount = teeth;
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return dut.convert(hz).value_or(-1);
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}
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TEST(VehicleSpeed, FakeCases) {
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// 0hz -> 0kph
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EXPECT_NEAR_M3(0, GetVssFor(500, 5, 10, 0));
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// 1000hz -> 144 kph
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EXPECT_NEAR_M3(144, GetVssFor(500, 5, 10, 1000));
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// Half size tires -> half speed
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EXPECT_NEAR_M3(72, GetVssFor(1000, 5, 10, 1000));
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// Double the axle ratio -> half the speed
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EXPECT_NEAR_M3(72, GetVssFor(500, 10, 10, 1000));
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// Twice as many teeth -> half speed
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EXPECT_NEAR_M3(72, GetVssFor(500, 5, 20, 1000));
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}
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TEST(VehicleSpeed, RealCases) {
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// V8 Volvo
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// 205/50R16 tire -> 521 rev/km
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// 3.73 axle ratio
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// 17 tooth speedo gear
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EXPECT_NEAR_M3(108.970f, GetVssFor(521, 3.73, 17, 1000));
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// NB miata
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// 205/50R15 tire -> 544 rev/km
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// 4.3 axle ratio
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// 21 tooth speedo gear
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EXPECT_NEAR_M3(73.285f, GetVssFor(544, 4.3, 21, 1000));
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// Some truck with ABS sensors
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// 265/65R18 tire -> 391 rev/km
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// 1.0 ratio because ABS sensors are hub mounted
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// 48 tooth abs sensor
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EXPECT_NEAR_M3(191.816f, GetVssFor(391, 1, 48, 1000));
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}
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