GB/T 3367.2-2018Glossary of terms for diesel locomotives - Part 2: Diesel engine (English PDF)

2.1 Diesel engine classification

2.1.1 Two-stroke diesel engine two-strokedieselengine The piston completes a duty cycle of the diesel engine through two strokes. [

GB/T 1883.1-2005, definition 7.3]

2.1.2 Four-stroke diesel engine four-strokedieselengine The piston completes a duty cycle of the diesel engine through four strokes. [

GB/T 1883.1-2005, definition 7.2]

2.1.3 Low speed diesel low-speeddieselengine A diesel engine with a crankshaft speed n <= 300 r/min or an average piston speed vm < 6 m/s.

2.1.4 Medium speed diesel engine medium-speeddieselengine

2.1.5 High speed diesel high-speeddieselengine A diesel engine with a crankshaft speed n > 1200 r/min or an average piston speed vm > 12 m/s.

2.1.6 Supercharged diesel engine superchargeddieselengine A diesel engine that uses a supercharger to increase the charge (2.2.16) density and increase the power.

2.1.7 Low pressure diesel engine lowpressure-chargingdieselengine A supercharged diesel engine with a supercharging pressure pb <=

0.15 MPa.

2.1.9 High pressure diesel engine highpressure-chargingdieselengine

2.1.10 Super high pressure diesel engine superhighpressure-chargingdieselengine A supercharged diesel engine with a supercharging pressure pb >

0.35 MPa.

2.1.11 Exhaust gas turbocharged diesel turbochargingdieselengine A diesel engine that uses a diesel exhaust energy to drive an exhaust gas turbocharger for boosting.

2.1.12 Supercharged diesel engine mechanicalsuperchargingdieselengine A diesel engine that is mechanically driven by a diesel engine to supercharge the supercharger.

2.1.13 Two-stage supercharged diesel engine two-stagesuperchargeddieselengine The charge (2.2.16) is a two-pressed diesel engine.

2.1.14 Compound diesel compound-superchargingdieselengine In addition to driving the compressor, the exhaust gas turbine transmits the remaining power to the exhaust gas turbocharged diesel engine that is outputted by the diesel engine crankshaft.

2.1.15 Vertical diesel engine verticaldieselengine The cylinder centerline is perpendicular to the horizontal plane of the diesel engine.

2.1.16 Horizontal diesel engine horizontaldieselengine The cylinder centerline is parallel or close to the parallel diesel engine.

2.1.17 Inline diesel engine in-linedieselengine A diesel engine having two or more upright cylinders arranged in a row.

2.1.18 For piston-type diesel engines opposed-pistondieselengine There are two piston-operated diesel engines in the same cylinder.

2.1.19 V-type diesel engine V-typedieselengine A diesel engine having two or two columns of cylinders with a V-shaped centerline angle and sharing a crankshaft.

2.1.20 Single cylinder diesel engine single-cylinderdieselengine There is only one cylinder for the diesel engine.

2.1.21 Multi-cylinder diesel engine multi-cylinderdieselengine A diesel engine with two or more cylinders.

2.2 Diesel engine working process

2.2.1 Cylinder diameter cylinderborediameter The diameter of the bore in the cylinder.

2.2.2 Crank radius crankradius The distance from the crankpin centerline of the crankshaft to the centerline of the main journal.

2.2.3 Piston stroke pistonstoke The distance between the upper and lower stop points of the piston.

2.2.4 Stroke bore ratio stroke-boreratio The ratio of stroke to bore.

2.2.5 Link length lengthofconnectingrod The distance between the centerline of the end hole size of the connecting rod.

2.2.6 Crank link than crankradius-connectingrodlengthratio The ratio of the crank radius to the length of the connecting rod.

2.2.7 Stop deadcentre When the piston reciprocates, its top surface changes from one direction to the position of the transition point in the opposite direction.

2.2.8 Top dead center topdeadcentre The stop point when the top surface of the piston is farthest from the centerline of the crankshaft.

2.2.9 Bottom deadbot bottomdeadcentre The stop point of the top surface of the piston closest to the centerline of the crankshaft.

2.2.10 Inner dead point innerdeadcentre The dead center of the piston top surface of the piston-type diesel engine (2.1.18) which is the farthest from the crankshaft center line.

2.2.11 External stop point outerdeadcentre The dead center of the piston top surface of the piston-type diesel engine (2.1.18) closest to the crankshaft centerline.

2.2.12 Cylinder maximum volume maximumcylindervolume The volume of the closed space above the piston at the bottom dead center (outside stop) of the piston.

Note. It is the sum of cylinder working volume and cylinder clearance volume.

2.2.13 Cylinder clearance volume cylinderclearancevolume The volume of the closed space above the piston at the top dead center (internal stop point) of the piston.