Method for operating an internal combustion engine
An internal combustion engine, reciprocating motion technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problem that the engine cycle cannot be executed in an effective manner
Active Publication Date: 2022-05-17
VOLVO LASTVAGNAR AB
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Problems solved by technology
In other words, when operating at part load or low load, the cycle of the engine cannot be performed in an efficient manner
Method used
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[0066] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for sufficiency and completeness. Throughout the specification, the same reference numerals denote the same elements.
[0067] Figure 1a is a side view of a vehicle in the form of a truck or tractor for a semi-trailer. It should be noted that the vehicle may be of various alternative types, for example it may be a car, a bus or a construction machine such as a wheel loader.
[0068]Figure 1a The vehicle 1 in comprises an internal combustion engine system 10 adapted to operate according to the method of an example embodiment of the invention. The internal combustion engine system 10 includes an internal combustion engine 2 w...
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The invention relates to a method (100) for operating an internal combustion engine (2), for example an internal combustion engine of a vehicle (1), said engine (2) comprising: an engine cylinder (3) at least partially delimiting a combustion chamber (4) and a reciprocating piston (5); a plurality of intake valves (20) in fluid communication with the combustion chamber; and a plurality of exhaust valves (30) in A plurality of exhaust valves (30) are in fluid communication with the combustion chamber, wherein either of the intake valve and the exhaust valve includes at least one flow control valve. The method comprises the steps of: opening (105) at least one of the intake valves and introducing an inflowing fluid medium into a cylinder (3) of the engine by performing an intake stroke (S1); compressing (110) the trapped inflowing fluid medium during a first compression stroke (CS1) of the cylinder (3), while keeping the plurality of intake valves and the plurality of exhaust valves in a closed state ; injecting ( 115 ) an amount of fuel into said cylinder ( 3 ) and combusting said injected fuel; performing ( 120 ) a first working stroke ( WS1 ) to generate power to the crankshaft of said engine while controlling the flow control valve to partially discharge the combusted gases at the end of the working stroke; additionally compress (125) the remaining fluid medium during the additional compression stroke (CS2) of the cylinder (3), while allowing the a plurality of intake valves and said plurality of exhaust valves are closed; an additional amount of fuel is additionally injected (130) into said cylinder (3); an additional working stroke (WS2) is additionally performed (135) to generating power to a crankshaft of the engine while controlling the flow control valve to partially exhaust the combusted gases at the end of the additional working stroke; and, opening (180) at least one of the exhaust valves , and allowing partially combusted gases to be expelled from the cylinder via the at least one exhaust valve by performing an exhaust stroke (ES).
Description
technical field [0001] The invention relates to a method for operating an internal combustion engine. By way of example, the invention relates to a method for operating an internal combustion engine of a vehicle. In particular, the invention relates to a method for operating an extended four-stroke internal combustion engine of a vehicle. The invention also relates to an internal combustion engine comprising a control unit for carrying out a method of operating the engine. [0002] The invention is applicable to various types of vehicles, especially heavy vehicles such as trucks, buses, construction equipment, construction machinery (such as wheel loaders), articulated dump trucks, dump trucks, excavators and backhoe loaders Wait. Although the invention will be described mainly in relation to trucks, the invention is not particularly limited thereto but may also be used in other vehicles, such as construction machinery. The invention is also applicable in any other type of...
Claims
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IPC IPC(8): F02D15/04F02B75/02
CPCF02B75/021F02B2075/028
Inventor 本特·拉塞松弗雷德里克·拉姆
Owner VOLVO LASTVAGNAR AB