CONTROLLING FLOW OF EXHAUST GAS INTO TURBOCHARGER OF ENGINE

• US 20160273445A1
• Filed: 05/31/2016
• Published: 09/22/2016
• Est. Priority Date: 05/31/2016
• Status: Abandoned Application

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Pierpont, David A.
• Application Number:
  US15/168,508
• Publication Number:
  US 20160273445A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01N 13/10 of exhaust manifolds with cooling jacket F01N3/046
• CPC Class Codes: F01N 2260/14 for modifying or adapting flow area or back-pressure
• CPC Class Codes: F02B 37/025 Multiple scrolls or multiple gas passages guiding the gas to the pump drive
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A system for controlling flow of exhaust gas into a turbocharger of an engine is provided. The system includes an exhaust manifold having a first outlet port and a second outlet port. A valve element is pivotally coupled between the first and the second outlet ports. The system includes a control module that determines a value of load condition of the engine. The control module actuates the valve element from a first position to a second position when the value of the load condition is less than a threshold. In the first position, the valve element directs exhaust gas received from a first set of cylinders and a second set of cylinders to the first outlet port and the second outlet port, respectively. In the second position, the valve element allows the exhaust gas to enter one of the first outlet port and the second outlet port.

Claims

1. A system for controlling flow of exhaust gas into a turbocharger of an engine, the system comprising:

an exhaust manifold having a plurality of inlet ports in fluid communication with a plurality of cylinders of the engine to receive the exhaust gas therefrom, and a pair of outlet ports in fluid communication with the turbocharger of the engine, wherein the pair of outlet ports includes a first outlet port and a second outlet port to communicate with a. first inlet port and a second inlet port, respectively, of the turbocharger;

a valve element pivotally coupled within the exhaust manifold between the first outlet port and the second outlet port, the valve element being movable between a first position and a second position;

an actuating unit coupled to the valve element and adapted to move the valve element between the first position and the second position; and

a control module in electronic communication with the actuating unit, the control module being configured to;

receive an input indicative of an operating parameter of the engine;

determine a value of load condition of the engine based on the operating parameter;

compare the value of the load condition of the engine with a threshold; and

actuate the valve element from the first position to the second position through the actuating unit, when the value of the load condition is less than the threshold,

wherein, in the first position, the valve element directs the exhaust gas received from a first set of the plurality of cylinders to the first outlet port and the exhaust gas received from a. second set of the plurality of cylinders to the second outlet port, and, in the second position, the valve element allows the exhaust gas received from the plurality of cylinders to enter one of the first outlet port and the second outlet port.