The Caterpillar C1.1 is a 1.13 L (1,130 cc, 68.96 cu·in) natural aspirated three-cylinders four-stroke liquid-cooled internal combustion vertical diesel, manufactured by Caterpillar Inc. for general-purpose applications.
The Cat C1.1 engine has a three-cylinders, cast-iron cylinder block, overhead valve design, indirect injection fuel system, 12 volts electric starter motor, and 12 Volts (40 amp) alternator. This engine used a belt-driven coolant pump and coolant temperature switch. The lubrication system consists of a closed-circuit breather, spin-on lube oil filter, lube oil pressure switch, and lube oil sump.
The Caterpillar C1.1 engine produced:
- EU Stage IIIA emission standards (Standard version): From 20 PS (14.7 kW; 19.7 HP) at 2,200 rpm to 28.6 PS (21 kW; 28.2 HP) at 3,400 rpm of output power and 59 N·m (6 kg·m, 43.5 ft·lb) at 3,200 rpm of torque.
- EU Stage IIIA emission standards (Derate version): From 18.6 PS (13.7 KW; 18.4 HP) at 2,200 rpm to 24.1 PS (17.7 KW; 23.7 HP) at 3,000 rpm of maximum power
- U.S. EPA Tier 4 Final emission standards: From 19.6 PS (14.4 KW; 19.3 HP) at 2,200 rpm to 25.0 PS (18.4 KW; 24.7 HP) at 2,800 rpm of power.
- U.S. EPA Tier 4 Interim emission standards (Standard version): From 20.0 PS (14.7 KW; 19.7 HP) at 2,200 rpm to 28.6 PS (21.0 KW; 28.2 HP) at 3,400 rpm of power.
- U.S. EPA Tier 4 Interim emission standards (Derate version): From 18.6 PS (13.7 KW; 18.4 HP) at 2,200 rpm to 28.6 PS (21.0 KW; 28.2 HP) at 3,400 rpm of power.
The CAT C1.1 power unit produced:
- EU Stage IIIA emission standards: 26.8 PS (19.7 KW; 26.4 HP) at 3,000 rpm.
- U.S. EPA Tier 4 Final emission standards: 19.6 PS (14.4 KW; 19.3 HP) at 2,200 rpm.
- U.S. EPA Tier 4 Interim emission standards: 24.3 PS (17.9 KW; 24.0 HP) at 3,000 rpm.
General information
| Engine Specifications | |
| Engine model | Cat C1.1 |
| Engine type | 4-stroke, OHV, three-cylinders |
| Displacement | 1,130 cm3, (68.96 cu·in) |
| Max. horsepower |
Engine EU Stage IIIA (Standard version): 20 PS (14.7 kW; 19.7 HP) at 2,200 rpm to 28.6 PS (21 kW; 28.2 HP) at 3,400 rpm EU Stage IIIA (Derate version): 18.6 PS (13.7 KW; 18.4 HP) at 2,200 rpm to 24.1 PS (17.7 KW; 23.7 HP) at 3,000 rpm U.S. EPA Tier 4 Final: 19.6 PS (14.4 KW; 19.3 HP) at 2,200 rpm to 25.0 PS (18.4 KW; 24.7 HP) at 2,800 rpm U.S. EPA Tier 4 Interim (Standard version): 20.0 PS (14.7 KW; 19.7 HP) at 2,200 rpm to 28.6 PS (21.0 KW; 28.2 HP) at 3,400 rpm U.S. EPA Tier 4 Interim (Derate version): 18.6 PS (13.7 KW; 18.4 HP) at 2,200 rpm to 28.6 PS (21.0 KW; 28.2 HP) at 3,400 rpm Power unit: |
| Max. torque |
EU Stage IIIA (Standard version): 59 N·m (6 kg·m, 43.5 ft·lb) at 3,200 rpm |
| Cooling system | Liquid-cooled |
| Lubricating system | Pressure feed |
| Fuel system | Indirect injection |
| Fuel used | Diesel |
| Starting system | Starter motor 12 Volts |
| Starting aid | Glow plug |
| Charging system | Alternator 12 Volts (40 amp) |
| PTO shaft rotation | Counterclockwise (from flywheel end) |
| Dimensions (L x W x H) |
Engine: 491 x 400 x 576 mm (19.3 x 15.7 x 22.7 in) Power unit: 778 x 438 x 730 mm (30.6 x 17.2 x 28.7 in) |
| Dry weight |
Engine:87.0 kg (192 lbs) Power unit: 129.0 kg (284.0 lbs) |
Cylinder Block and Head
Cylinder bore and piston stroke are 77.0 mm (3.03 in) and 81.0 mm (3.19 in), respectively. Compression ratio rating is 23.0:1. The engine used cast iron engine block, cast iron exhaust manifold and inlet manifold with choice of inlets.
| Cylinder block | |
| Cylinder block alloy: | Cast-iron |
| Compression ratio: | 23.0:1 |
| Cylinder bore: | 77.0 mm (3.03 in) |
| Piston stroke: | 81.0 mm (3.19 in) |
| Crankshaft center distance: | 40.5 mm (1.595 in) |
| Cylinder head | |
| Cylinder head alloy: | Cast-iron |
| Valve arrangement: | OHV |
| Valves: | 2 per cylinder, (6 valves in total) |
Service Data
The engine oil with a viscosity of SAE 10W-30 is recommended for the C1.1, refilling oil capacity is 4.4 L (4.65 US. qt, 3.87 Imp. qt.).
| Oil system | |
| Lubrication system: | Pressure feed |
| Oil capacity: | 4.4 L (4.65 US. qt, 3.87 Imp. qt.) |
| Cooling system | |
| Cooling system: | Liquid-cooled |
| Capacity: | 1.9 L (2.0 U.S. qts) |
| Fuel system | |
| Type: | Indirect injection |
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