An engine control apparatus of a vehicle comprises an air conditioner with a variable displacement compressor (104). The pressure difference measured between two monitoring points in a refrigeration circuit represents the compressor displacement. The compr...

An air-conditioning system with a refrigerant circulation circuit, which has improved control precision for maintaining a compartment temperature and improved response characteristics. The refrigerant circulation circuit includes a variable displacement ty...

In a cylinder head 1 has boss portions 8 for head bolts 11 which are formed inside of both sides of the cylinder head 1, and a discharge/intake port 5 which extends from an intermediate portion 15a of a lower-surface deck 15 that is in contact with a gaske...

A vehicle air conditioner includes a variable displacement compressor (10) forming a part of a coolant circuit, detectors (80-83) for detecting external information necessary for air conditioning, and a controller (79). The compressor (10) has pistons (35)...

An air conditioner having a refrigerant circuit that maintains a high cooling efficiency and a sufficient amount of oil returned to a compressor even if the flow rate of refrigerant is decreased due to a low cooling load is provided. The refrigerant circui...

An industrial vehicle includes a transmission, which is coupled to an engine by a torque converter. When the vehicle is accelerating, the rotational acceleration of driving wheels is computed based on the rotational speed of the driving wheels. A traction ...