148 results about "Heavy duty diesel" patented technology

A piston particularly adapted for heavy-duty diesel engine applications is fabricated from separate parts having circumferentially extending joining surfaces that are heated prior to bonding to an elevated temperature sufficient to enable bonding of the joining surfaces, and thereafter the joining surfaces brought into contact with one another and twisted to attain a permanent metallurgical weld at the interface of the joining surfaces. The piston has radially spaced walls which are both welded simultaneously. The weld joints may lie in the same or different planes. Once joined, and while still hot, the parts may be pulled apart slightly to reduce the wall thicknesses at the weld joint.

Disclosed are washcoats, coated substrates formed from such washcoats, and catalytic converters for use in diesel applications, such as heavy duty diesel applications. Methods of preparing the coated substrates are also disclosed.

Lubricating oil compositions are provided that inhibit coolant-induced oil filter plugging in heavy-duty diesel engines, and particularly CJ-4 and CI-4 PLUS compliant lubricating oil compositions that inhibit coolant-induced oil filter plugging in exhaust gas recirculation or recycle engines.

The present invention is directed to a low sulfur, low sulfated ash and low phosphorus lubricating oil composition for low emission heavy duty diesel engines comprising (a) a major amount of an oil of lubricating viscosity and (b) a detergent composition comprising a (i) a mixture of a metal salt of an alkyl hydroxyaromatic carboxylic acid and a metal salt of an alkyl phenol, and (ii) a metal salt of a Mannich condensation product of an alkyl phenol. The present invention is also directed to a low sulfur, low sulfated ash and low phosphorus lubricating oil concentrate comprising (a) an oil of lubricating viscosity and (b) a detergent composition comprising a (i) a mixture of a metal salt of an alkyl hydroxyaromatic carboxylic acid and a metal salt of an alkyl phenol, and (ii) a metal salt of a Mannich condensation product of an alkyl phenol.

The invention relates to an active oil-gas separator which is characterized in that the upper end of a base assembly is fixedly connected with an upper shell assembly, a sealing ring is arranged at the joint of the base assembly and the upper shell assembly, an inner cavity of the base assembly is an oil return cavity, a gas outlet cavity assembly is assembled at the lower end of an inner cavity of the upper shell assembly, a driving shaft assembly is vertically arranged in a cavity formed by the base assembly and the upper shell assembly, an auxiliary separating impeller is arranged on the portion of the driving shaft assembly positioned in the base assembly, an engine oil spraying hole is formed below the driving shaft assembly, a lamination lower body, a lamination and a lamination upper body sleeve the portion of the driving shaft assembly positioned in the upper shell assembly from bottom to top, the lamination lower body is limited by a limiting spring, the lamination upper body is limited by a clamping spring, a pressing plate is arranged in a side cover above the upper shell assembly, a diaphragm is arranged at the pressing plate, the maximum gap is kept between the diaphragm and a gas outlet, and the diaphragm is supported by a pressure adjusting valve spring. The active oil-gas separator can solve the problems that the overall engine performance and reliability of medium-duty and heavy duty diesel engines are reduced after a closed crankcase ventilation system is used.