Cummins Engine Company, Inc.

Cummins Inc.

Rod Radovanovic

Paul R Miller

A S Ghuman

Angela R May

Bruce G Bunting

Bradlee J Stoia

John M Janssen

Todd A Sheridan

S Arvind Suresh

Gregory H Henderson

Peter Vinson Woon

Amarjit S Ghuman

Byron J Bunker

John W Shoemaker

Angie R May

An engine tuned for use with a hybrid engine or CVT has a relatively narrow torque curve that is roughly centered at the engine's rated speed, with less than 50% of the maximum torque provided throughout 80% of the range of engine speeds. The relatively narrow torque peak permits a variety of optimizations that improve fuel economy and reduce emissions.

Engine tuned for hybrid electric and continuously variable transmission applications

A system for controlling the temperature of a particulate filter coupled to an exhaust outlet of an internal combustion engine includes a controller responsive to volumetric flow and temperature of exhaust gas to determine a filter regeneration parameter. In a hybrid electric-engine vehicle application, various control strategies are implemented as a function of the regeneration parameter to control exhaust gas temperature suitably for proper regeneration of the particulate filter. Such strategies include shifting the duty cycle of the engine toward lower engine speed operation along lines of constant power output, modifying the ratio of electrical power and engine power and controlling recharging of the battery supplying electrical energy to the vehicle's electric drive motor under vehicle deceleration conditions. In vehicle applications including a transmission coupled directly to the engine, shift points of the transmission are modified as a function of the regeneration parameter to control exhaust gas temperature.

System for controlling particulate filter temperature

A system and a method for hydraulic actuation of poppet valves. The poppet valve is opened by application of hydraulic pressure to a piston, and is closed by action of a mechanical spring. Hydraulic pressure comes from either a high pressure source of a low pressure source, the low pressure source being higher than ambient pressure. Application of hydraulic pressure is made by a pressure control device based upon signals received from an electronic controller. Hydraulic pressure is applied in a way that minimizes the power required to actuate the valve by making use of valve inertia.

Dual-pressure hydraulic valve-actuation system

EGR induction supercharged or turbocharged internal combustion engine having EGR and EGR cooling in which EGR cooling is obtained through jacket water coolers and/or an air-to-air aftercooler. EGR induction is obtained via either low pressure (ambient) induction to the system intake, or via venturi or passive pump induction into the pressurized intake. Bypassing of the EGR cooler is used to reduce condensation and fouling in the EGR cooler and to provide warmer air to reduce light load and cold ambient hydrocarbon production. A passive or catalyzed particulate trap and crankshaft driven supercharger boosting system are provided to address engine response deterioration and particulate increase problems associated with EGR.

Cooled exhaust gas recirculation system with load and ambient bypasses

A gas flow network in combination with a highly turbocharged diesel engine for the blending of either EGR gas or blow-by gas from the crankcase vent with fresh charge air is disclosed. In the diesel engine assembly which incorporates the flow network for EGR gas, a venturi conduit and control valve combination is positioned between tile intake manifold and aftercooler and is connected to a flow line carrying the EGR gas. When the turbocharged diesel engine assembly is configured with a flow path for blow-by gas, the venturi and control valve combination is positioned between the intake manifold and aftercooler and is connected to a flow line carrying blow-by gas. These systems utilize a low static pressure at the narrow throat of the venturi so as to induce the flow of EGR gas or blow-by gas into the fresh charge air, the flow being controlled by the state of the control valve.

EGR and blow-by flow system for highly turbocharged diesel engines

A control system for a diesel engine for creating an ON/OFF feedback signal for controlling engine-related functions includes a mechanical assembly involving a fuel injection pump, a governor for the fuel injection pump, a pair of cam stops as part of the governor and an electrically grounded moveable rack finger. One of the cam stops is a fixed stop which limits travel of the rack finger and thus limits fueling to a predetermined level. The only variable which determines fuel quantity for this full load cam stop is engine speed. The second stop which limits rack finger travel is an air-fuel cam stop which has two independent variables that determine the fuel limit. These independent variables are engine speed and engine boost pressure. The air-fuel cam stop is placed within a housing which is electrically isolated from the rest of the fuel pump and the engine. Once there is contact between the moveable rack finger and the air-fuel cain an electrical signal (ON) is created which may be used to activate or energize other engine-related functions such as shutting off EGR during air limited operation.

Growing community of inventors

Columbus, IN, United States of America

Rod Radovanovic