System and method for controlling engine

Abstract

A system may be used for determining a parameter relating to a piston in an engine. The parameter may be the piston position, speed, etc., which may be determined at a reference point in a cylinder. The system may be controlled based on the determined parameter. The engine may be a linear reciprocating engine, opposed piston engine, etc. The system may include a first sensor provided on a base connected to the engine, and a second sensor provided on the base. The first sensor may be configured to generate a signal in response to a component coupled to the piston being in a region of the first sensor. The second sensor may be configured to generate a signal in response to a component coupled to the piston interacting with the second sensor. The system may include an energy transformer configured to transform motion of the engine to electrical power.

1 - 40 . (canceled) 
     
     
         41 . A system for determining a state of an engine, the system comprising:
 a first sensor configured to determine a parameter related to the state of the engine with a first granularity;   an electronic control unit configured to determine the state of the engine, wherein the electronic control unit is configured to: determine that a piston of the engine is in a first region of the engine when output of the first sensor is a first value, and to determine that the piston is in a second region of the engine when output of the first sensor is a second value, and determine a moving direction of the piston based on a change between the first value and the second value.   
     
     
         42 . The system of  claim 41 , further comprising a second sensor configured to determine a parameter related to the state of the engine with a second granularity, wherein the second granularity is finer than the first granularity, wherein the moving direction is determined solely based on output of the first sensor. 
     
     
         43 . The system of  claim 41 , wherein the engine includes a linear reciprocating engine, the first sensor is provided on a base configured to be connected to the linear reciprocating engine, the first sensor configured to generate a signal in response to a component coupled to the piston being in a region of the first sensor, the signal including a first signal corresponding to the piston being in a first half of a cylinder or a second signal corresponding to the piston being in a second half of the cylinder, and the electronic control unit is configured to determine to inject fuel into the first half of the cylinder or the second half of the cylinder based on a change in output of the first sensor.