Engine
AssigneeYanmar Power Technology Co., Ltd.
InventorsTaishi Murakami, Masayoshi Doui
Life of this patent
Estimating the term…
Abstract
An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.
Claims3
An engine comprising:
- an intake manifold configured to supply air into a cylinder;
- a turbocharger configured to compress air with exhaust gas from an exhaust manifold;
- the exhaust manifold configured to emit exhaust gas from the cylinder;
- an exhaust bypass channel connecting an outlet of the exhaust manifold and an exhaust outlet of the turbocharger, the exhaust bypass channel having an exhaust bypass valve in the exhaust bypass channel,
- an intake bypass channel connecting an inlet of the intake manifold and an inlet of the turbocharger, the intake bypass channel provided with an intake bypass valve,
- wherein the engine includes at least one of the exhaust bypass channel and the intake bypass channel;
- an intake pressure sensor configured to detect a pressure of the intake manifold;
- and
- a control device configured to perform feedback control by outputting an instruction value of a degree of valve opening of the exhaust bypass valve and the intake bypass valve such that a pressure detected by the intake pressure sensor approaches a set target pressure of the intake manifold,
- wherein the control device is configured to perform feedback control on the exhaust bypass valve and the intake bypass valve.
Dependencies are inferred from the claim text.