Fuel injected engine system
First Claim
1. An engine system, comprising:
- an engine having a fuel and air supply circuit and an exhaust circuit;
a temperature sensor mounted on an exterior of the engine;
an oxygen sensor located in the exhaust circuit and operable to provide a signal indicative of the oxygen content of engine exhaust gases;
a throttle body mounted on the engine and having a throttle valve to control the flow rate of air delivered to the engine;
a fuel injector carried by the throttle body to deliver fuel to the engine;
a fuel rail carried by at least one of the throttle body and the fuel injector and having an inlet to receive a supply of fuel and an outlet through which fuel is routed to the fuel injector;
the fuel rail is rotatably carried by the throttle body and includes an anti-rotation feature to retain a desired position of the fuel rail in assembly; and
an engine control unit communicated with the temperature sensor, the oxygen sensor, the throttle valve and the fuel injector to control the fuel and air mixture provided to the engine as a function of the temperature sensor output and the oxygen sensor output.
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Accused Products
Abstract
An engine system may include a fuel and air supply circuit and an exhaust circuit, a temperature sensor mounted on an exterior of the engine and an oxygen sensor located in the exhaust circuit. The fuel and air supply circuit may include a throttle body mounted on the engine and having a throttle valve to control the flow rate of air delivered to the engine, a fuel injector carried by the throttle body to deliver fuel to the engine and a fuel rail carried by at least one of the throttle body and the fuel injector and having an input to receive a supply of fuel and an outlet through which fuel is routed to the fuel injector. An engine control unit may be communicated with these components to control the fuel and air mixture provided to the engine as a function of the temperature and oxygen sensor outputs.
28 Citations
18 Claims
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1. An engine system, comprising:
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an engine having a fuel and air supply circuit and an exhaust circuit; a temperature sensor mounted on an exterior of the engine; an oxygen sensor located in the exhaust circuit and operable to provide a signal indicative of the oxygen content of engine exhaust gases; a throttle body mounted on the engine and having a throttle valve to control the flow rate of air delivered to the engine; a fuel injector carried by the throttle body to deliver fuel to the engine; a fuel rail carried by at least one of the throttle body and the fuel injector and having an inlet to receive a supply of fuel and an outlet through which fuel is routed to the fuel injector; the fuel rail is rotatably carried by the throttle body and includes an anti-rotation feature to retain a desired position of the fuel rail in assembly; and an engine control unit communicated with the temperature sensor, the oxygen sensor, the throttle valve and the fuel injector to control the fuel and air mixture provided to the engine as a function of the temperature sensor output and the oxygen sensor output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An engine system, comprising:
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an engine having a fuel and air supply circuit, an exhaust circuit and one or more cooling fins integrally formed on at least part of the main body; a temperature sensor mounted on an exterior of the engine, coupled to a cooling fin by direct engagement of a portion of the temperature sensor with the cooling fin and without requiring any void formed in the cooling fin; a resilient clip having a first portion overlying part of the temperature sensor and a second portion overlying the cooling fin to trap the temperature sensor against the cooling fin under a compressive force; an oxygen sensor located in the exhaust circuit and operable to provide a signal indicative of the oxygen content of engine exhaust gases; a throttle body mounted on the engine and having a throttle valve to control the flow rate of air delivered to the engine; a fuel injector carried by the throttle body to deliver fuel to the engine; a fuel rail carried by at least one of the throttle body and the fuel injector and having an inlet to receive a supply of fuel and an outlet through which fuel is routed to the fuel injector; and an engine control unit communicated with the temperature sensor, the oxygen sensor, the throttle valve and the fuel injector to control the fuel and air mixture provided to the engine as a function of the temperature sensor output and the oxygen sensor output. - View Dependent Claims (16, 17)
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18. An engine system, comprising:
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an engine having a fuel and air supply circuit and an exhaust circuit; a temperature sensor mounted on an exterior of the engine; an oxygen sensor located in the exhaust circuit and operable to provide a signal indicative of the oxygen content of engine exhaust gases; a throttle body mounted on the engine and having a throttle valve to control the flow rate of air delivered to the engine; a fuel injector carried by the throttle body to deliver fuel to the engine; a fuel rail rotatably carried by at least one of the throttle body and the fuel injector and having an inlet to receive a supply of fuel and an outlet through which fuel is routed to the fuel injector; an anti-rotation feature retaining a desired position of the fuel rail in assembly; and an engine control unit communicated with the temperature sensor, the oxygen sensor, the throttle valve and the fuel injector to control the fuel and air mixture provided to the engine as a function of the temperature sensor output and the oxygen sensor output.
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Specification