TH58623A - A tool for determining operating conditions for internal combustion engines. - Google Patents

Abstract

DC60 (10/04/46) The intake pressure in the intake passage (2) is detected at different predetermined rotation angles set outside the intake stroke in one combustion cycle of engine (1). The acceleration/deceleration and steady-state conditions of engine (1) are determined based on the amount of change between the preceding intake pressure and the current intake pressure detected at the same rotation angle. Thus, even if no current-force valve angle sensing device is used, there will be a number of intake pressure detection time points in one combustion cycle of engine (1). The operating conditions are determined from changes in pressure other than the intake stroke. The intake pressure in the intake passage (2) is detected at different predetermined rotation angles set outside the intake stroke in one combustion cycle of engine (1). The acceleration/deceleration and steady-state conditions of engine (1) are determined based on the amount of change between the preceding intake pressure and the current intake pressure detected at the same rotation angle. Thus, even if no current-force valve angle sensing device is used, there will be a number of intake pressure detection time points in one combustion cycle of engine (1). There will be a number of points of time for detecting the intake pressure in one combustion cycle of an engine (1). The operating conditions will be determined from changes in pressure in other than the intake cycle.

Claims (4)

Revised 6/11/2015 1. The operating condition determination device (30) for internal combustion engines (1) consists of: intake pressure sensing pathways (21, 30) for detecting multiple intake pressures in the intake passage (2) at a predetermined rotation angle in one combustion cycle of the internal combustion engine (1); and the operating condition determination pathway (30) for determining the acceleration/deceleration and steady state of the engine from the amount of change between the previous intake pressure and the current intake pressure detected by the intake pressure sensing pathways (21, 30) at the same rotation angle of the engine (1) where the predetermined rotation angle is set at an angle outside the intake stroke. 2. The operating condition determination device (30) for internal combustion engines as defined in claim 1, where the predetermined rotation angle for intake pressure detection, which is set outside the intake stroke, is set on the compression, power (combustion) and exhaust strokes. In addition to the intake stroke, 3. The operating condition determination device for internal combustion engines as defined in Claim 1 or Claim 2, where the operating condition determination pathway determines the acceleration/deceleration and steady state of the internal combustion engine from the sum of each amount of change between the previous intake pressure and the current intake pressure detected at each of the predetermined rotation angles. 1. An instrument for determining the operating conditions (30) for an internal combustion engine (1) consisting of: intake pressure sensing pathways (21, 30) for detecting the intake pressure in the intake passage (2) at a predetermined rotation angle in one combustion cycle of the internal combustion engine (1); and an operating condition determination pathway (30) for determining the acceleration/deceleration and steady state of the engine from the amount of change between the previous intake pressure and the current intake pressure detected by the intake pressure sensing pathways (21,30) at the same rotation angle of the engine (1). 2. Operating Condition Determination Device (30) for an internal combustion engine (1), which consists of: an intake pressure sensing pathway (21,30) for detecting the intake pressure in the intake passage (2) at a predetermined rotation angle in one combustion cycle of the internal combustion engine (1); and an operating condition determination pathway (30) for determining the acceleration/deceleration and steady state of the engine from the amount of change between the previous intake pressure and the current intake pressure detected by the intake pressure sensing pathway (21,30) at exactly the same rotation angle of the internal combustion engine. 3. Operating condition determination device (30) for the engine as specified in Claim 1 or Claim 2, where a predetermined rotation angle is set at an angle outside the intake stroke. 4. Operating Conditioning Device (30) for the engine as defined in Claims 1 through 3, where the operating condition determination method (30) determines the acceleration/deceleration and steady-state conditions of the engine (1) from the sum of each amount of change between the previous intake pressure and the current intake pressure detected at each of the predetermined rotation angles.