US 2011/0238261 A1Published application

Engine control unit

AssigneeHonda Motor Co., Ltd.

InventorsMakoto TSUYUGUCHI, Akihiko Hamazaki, Toru Takeda

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Abstract

An engine control unit includes an anomaly judging section for judging whether or not there is any anomaly in throttle sensors based on the output of the throttle sensors, a throttle motor driving section for controlling the driving of a throttle motor, and a fuel injection control section for controlling the amount of fuel injection at the time of starting an engine by using the fuel injection map for starting. The throttle motor driving section stops the driving of the throttle motor if the throttle sensors are judged to be anomalous, and the fuel injection control section switches the fuel injection map for starting in a normal state into the fuel injection map for starting in an anomalous state at the time of restarting the engine after stopping the engine in a state wherein the throttle sensors are judged to be anomalous.

Claims20

Dependent claims

An engine control unit comprising:

a drive system capable of driving a motorcycle backward while an engine is running;
a throttle valve energized toward a closed position by a return spring;
and
a drive-by-wire system for detecting the amount of operation of the accelerator by accelerator opening sensors for driving said throttle valve by a throttle motor in response to the amount of operation, thereby controlling the opening of said throttle valve and detecting said opening by throttle opening sensors,
wherein said engine control unit has an anomaly judging section for judging whether or not there is anomaly in said throttle valve opening sensors based on the output of said throttle valve opening sensors, a throttle motor driving section for controlling the driving of said throttle motor, and a fuel injection control section for controlling the amount of fuel injection at the time of starting the engine by using the fuel injection map for starting,
said throttle motor driving section stops the driving of said throttle motor if said throttle valve opening sensors are judged to be anomalous by said anomaly judging section, thereby causing said throttle valve to be returned to the closed position by said return spring, and
said fuel injection control section has said fuel injection map for starting which is applicable when said throttle valve opening sensors are in a normal state and said fuel injection map for starting in an anomalous state in which the amount of injection is set to be smaller than that in the fuel injection map for starting in a normal state, and said fuel injection control section also switches said fuel injection map for starting in a normal state into said fuel injection map for starting in an anomalous state, at the time of restarting the engine after the engine stops in a state wherein said throttle valve opening sensors are judged to be anomalous by said anomaly judging section, thereby enabling the engine to start and allowing the motorcycle to be moved backward by said drive system.

4 more elements

An engine control unit comprising:

a throttle valve energized toward a closed position by a return spring;
and
a drive-by-wire system for detecting the amount of operation of the accelerator by accelerator opening sensors for driving said throttle valve by a throttle motor in response to the amount of operation of the accelerator, thereby controlling the opening of said throttle valve and detecting said opening by throttle opening sensors,
an anomaly judging section for judging whether or not there is an anomaly in said throttle valve opening sensors based on the output of said throttle valve opening sensors, a throttle motor driving section for controlling the driving of said throttle motor, and a fuel injection control section for controlling the amount of fuel injection at the time of starting the engine by using the fuel injection map for starting,
said throttle motor driving section stops the driving of said throttle motor if said throttle valve opening sensors are judged to be anomalous by said anomaly judging section, thereby causing said throttle valve to be returned to the closed position by said return spring, and
said fuel injection control section includes said fuel injection map for starting which is applicable when said throttle valve opening sensors are in a normal state and said fuel injection map for starting in an anomalous state in which the amount of injection is set to be smaller than that in the fuel injection map for starting in a normal state, and said fuel injection control section also switches said fuel injection map for starting in a normal state into said fuel injection map for starting in an anomalous state, at the time of restarting the engine after the engine stops in a state wherein said throttle valve opening sensors are judged to be anomalous by said anomaly judging section, thereby enabling the engine to start and allowing the motorcycle to be moved backward by said drive system.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/071,583Filed 25 Mar 2011
Priority: JP 2010-07508929 Mar 2010
Published: 29 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F02D 11/107
Of the electric type: safety-related aspects
B62K 11/14
Motorcycles, engine-assisted cycles or motor scooters with one or two wheels: handlebar constructions, or arrangements of controls thereon,…
F02B 61/02
Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing: for driving cycles
F02D 41/065
For starting: at hot start or restart