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US 5,027,769 AGranted
Throttle valve control apparatus
AssigneeMitsubishi Jidosha Kogya Kabushiki Kaisha
InventorsMasato Yoshida, Yoshiaki Danno, Kazuhide Togai
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AssigneeMitsubishi Jidosha Kogya Kabushiki Kaisha
InventorsMasato Yoshida, Yoshiaki Danno, Kazuhide Togai
Estimating the term…
Throttle valves are individually disposed in a plurality of intake passages of an engine. In normal operation condition of the throttle valves, a first control device controls the throttle valves according to the detection result of an operation condition detecting device to control the amounts of intake air of the individual intake passages, thereby obtaining good engine performance from low-speed to high-speed ranges. When an abnormality detecting device detects an abnormality in a throttle valve, a determination device determines a normal throttle valve, and a second control device controls only the normal throttle valve in preference to the first control device to control the intake air amount, thereby ensuring continued operation even if a malfunction occurs in one of the throttle valves. Also, intake passages of the engine are divided into two systems and are individually connected with surge tanks, a communication passage communicating with the surge tanks and a communication control valve ae provided, throttle valves and intake control valves are disposed in the individual passages, and the throttle valves, the communication control valve and the intake control valves are open/closed controlled by the operation condition detecting device and control device, thereby obtaining good engine performance and ensuring continued operation of the engine even if a malfunction occurs in the throttle valve control system, to maintain the stability of the vehicle.
A throttle valve control apparatus comprising an engine mounted on a vehicle, an intake passage unit divided into at least two air intake systems for forming intake passages to supply air to said engine, throttle valves disposed in said individual intake passages, operation condition detecting means for detecting the operation condition of the vehicle, first control means for controlling the amount of intake air into said engine by open/close controlling said throttle valves according to the operation condition of the vehicle detected by said operation condition detecting means, abnormality detecting means for detecting an abnormality in any of said throttle valves to output a detection result, a determination means for determining a normal throttle valve from the detection result of said abnormality detecting means when an abnormality is detected in any of said throttle valves by said abnormality detecting means to output a determination result, and second control means for controlling the amount of air supplied to each cylinder of said engine by controlling only a normal throttle valve determined by said determination means when an abnormality is detected in any of said throttle valves according to the operation condition of the vehicle detected by said operation condition detecting means in preference to said first control means.
A throttle valve control apparatus comprising an engine mounted on a vehicle, a first divided passage unit comprising first divided passages divided into two systems, a first surge tank connected at the downstream side of one of said first divided passages of said first divided passage unit, a second surge tank connected at the downstream side of the other of said first divided passages, a communication passage providing communication between said first and second surge tanks, a communication control valve to open and close said communication passage, a second divided passage unit comprising second divided passages each connected to each said surge tank at the downstream side of said individual surge tanks, a first intake control valve disposed in one of said second divided passages of said second divided passage unit, a second intake control valve disposed in the other of said second divided passages of said second divided passage unit, a confluence passage joining said individual second divided passages of said second divided passage unit and communicating with individual cylinders of said engine, throttle valves disposed in said individual first divided passages of said first divided passage unit, operation condition detecting means for detecting the operation condition of the vehicle, and control means for open/close controlling said throttle valves, said communication control valve, and said intake control valves according to the operation condition of the vehicle detected by said operation condition detecting means.
Dependencies are inferred from the claim text.